diff --git a/src/oberon.c b/src/oberon.c
index d636fba6b19d253c65a167420a25f21547bef892..931a30724697a03476cff779779b3385bad5f2b4 100644 (file)
--- a/src/oberon.c
+++ b/src/oberon.c
#include <string.h>
#include <assert.h>
#include <stdbool.h>
+#include <math.h>
+#include <float.h>
-#include "../include/oberon.h"
+#include <gc.h>
#include "oberon-internals.h"
+#include "oberon-type-compat.h"
+#include "oberon-common.h"
#include "generator.h"
-enum {
- EOF_ = 0,
- IDENT,
- MODULE,
- SEMICOLON,
- END,
- DOT,
- VAR,
- COLON,
- BEGIN,
- ASSIGN,
- INTEGER,
- TRUE,
- FALSE,
- LPAREN,
- RPAREN,
- EQUAL,
- NEQ,
- LESS,
- LEQ,
- GREAT,
- GEQ,
- PLUS,
- MINUS,
- OR,
- STAR,
- SLASH,
- DIV,
- MOD,
- AND,
- NOT,
- PROCEDURE,
- COMMA,
- RETURN,
- CONST,
- TYPE,
- ARRAY,
- OF,
- LBRACE,
- RBRACE,
- RECORD,
- POINTER,
- TO,
- UPARROW,
- NIL,
- IMPORT,
- REAL
-};
-
// =======================================================================
// UTILS
// =======================================================================
-void
-oberon_error(oberon_context_t * ctx, const char * fmt, ...)
-{
- va_list ptr;
- va_start(ptr, fmt);
- fprintf(stderr, "error: ");
- vfprintf(stderr, fmt, ptr);
- fprintf(stderr, "\n");
- fprintf(stderr, " code_index = %i\n", ctx -> code_index);
- fprintf(stderr, " c = %c\n", ctx -> c);
- fprintf(stderr, " token = %i\n", ctx -> token);
- va_end(ptr);
- exit(1);
-}
+static void
+oberon_make_copy_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args);
static oberon_type_t *
oberon_new_type_ptr(int class)
{
- oberon_type_t * x = malloc(sizeof *x);
+ oberon_type_t * x = GC_MALLOC(sizeof *x);
memset(x, 0, sizeof *x);
x -> class = class;
return x;
}
static oberon_type_t *
-oberon_new_type_boolean(int size)
+oberon_new_type_boolean()
{
oberon_type_t * x;
x = oberon_new_type_ptr(OBERON_TYPE_BOOLEAN);
- x -> size = size;
return x;
}
return x;
}
+static oberon_type_t *
+oberon_new_type_char(int size)
+{
+ oberon_type_t * x;
+ x = oberon_new_type_ptr(OBERON_TYPE_CHAR);
+ x -> size = size;
+ return x;
+}
+
+static oberon_type_t *
+oberon_new_type_string(int size)
+{
+ oberon_type_t * x;
+ x = oberon_new_type_ptr(OBERON_TYPE_STRING);
+ x -> size = size;
+ return x;
+}
+
+static oberon_type_t *
+oberon_new_type_set(int size)
+{
+ oberon_type_t * x;
+ x = oberon_new_type_ptr(OBERON_TYPE_SET);
+ x -> size = size;
+ return x;
+}
+
+static oberon_expr_t *
+oberon_new_operator(int op, oberon_type_t * result, oberon_expr_t * left, oberon_expr_t * right)
+{
+ oberon_oper_t * operator;
+ operator = GC_MALLOC(sizeof *operator);
+ memset(operator, 0, sizeof *operator);
+
+ operator -> is_item = 0;
+ operator -> result = result;
+ operator -> read_only = 1;
+ operator -> op = op;
+ operator -> left = left;
+ operator -> right = right;
+
+ return (oberon_expr_t *) operator;
+}
+
+static oberon_expr_t *
+oberon_new_item(int mode, oberon_type_t * result, int read_only)
+{
+ oberon_item_t * item;
+ item = GC_MALLOC(sizeof *item);
+ memset(item, 0, sizeof *item);
+
+ item -> is_item = 1;
+ item -> result = result;
+ item -> read_only = read_only;
+ item -> mode = mode;
+
+ return (oberon_expr_t *)item;
+}
+
+static oberon_type_t *
+oberon_get_type_of_int_value(oberon_context_t * ctx, int64_t i)
+{
+ if(i >= -128 && i <= 127)
+ {
+ return ctx -> byte_type;
+ }
+ else if(i >= -32768 && i <= 32767)
+ {
+ return ctx -> shortint_type;
+ }
+ else if(i >= -2147483648 && i <= 2147483647)
+ {
+ return ctx -> int_type;
+ }
+ else
+ {
+ return ctx -> longint_type;
+ }
+}
+
+static oberon_expr_t *
+oberon_make_integer(oberon_context_t * ctx, int64_t i)
+{
+ oberon_expr_t * expr;
+ oberon_type_t * result;
+ result = oberon_get_type_of_int_value(ctx, i);
+ expr = oberon_new_item(MODE_INTEGER, result, true);
+ expr -> item.integer = i;
+ expr -> item.real = i;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_system_byte(oberon_context_t * ctx, int64_t i)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_SYSBYTE, ctx -> system_byte_type, true);
+ expr -> item.integer = i;
+ expr -> item.real = i;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_char(oberon_context_t * ctx, int64_t i)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_CHAR, ctx -> char_type, true);
+ expr -> item.integer = i;
+ expr -> item.real = i;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_string(oberon_context_t * ctx, char * str)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_STRING, ctx -> string_type, true);
+ expr -> item.integer = str[0];
+ expr -> item.real = str[0];
+ expr -> item.string = str;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_real_typed(oberon_context_t * ctx, double r, oberon_type_t * result)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_REAL, result, true);
+ expr -> item.integer = r;
+ expr -> item.real = r;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_real(oberon_context_t * ctx, double r, bool longmode)
+{
+ oberon_type_t * result;
+ result = (longmode) ? (ctx -> longreal_type) : (ctx -> real_type);
+ return oberon_make_real_typed(ctx, r, result);
+}
+
+static oberon_expr_t *
+oberon_make_boolean(oberon_context_t * ctx, bool cond)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, true);
+ expr -> item.integer = cond;
+ expr -> item.real = cond;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_set(oberon_context_t * ctx, int64_t i)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_SET, ctx -> set_type, true);
+ expr -> item.integer = i;
+ expr -> item.real = i;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_set_index(oberon_context_t * ctx, int64_t i)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_SET, ctx -> set_type, true);
+ expr -> item.integer = 1 << i;
+ expr -> item.real = 1 << i;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_set_range(oberon_context_t * ctx, int64_t x, int64_t y)
+{
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_SET, ctx -> set_type, true);
+ expr -> item.integer = (x <= y) ? ((2 << y) - (1 << x)) : (0);
+ expr -> item.real = expr -> item.integer;
+ return expr;
+}
+
// =======================================================================
// TABLE
// =======================================================================
static oberon_scope_t *
oberon_open_scope(oberon_context_t * ctx)
{
- oberon_scope_t * scope = calloc(1, sizeof *scope);
- oberon_object_t * list = calloc(1, sizeof *list);
+ oberon_scope_t * scope = GC_MALLOC(sizeof *scope);
+ memset(scope, 0, sizeof *scope);
+
+ oberon_object_t * list = GC_MALLOC(sizeof *list);
+ memset(list, 0, sizeof *list);
scope -> ctx = ctx;
scope -> list = list;
if(scope -> up)
{
- scope -> parent = scope -> up -> parent;
scope -> local = scope -> up -> local;
+ scope -> parent = scope -> up -> parent;
+ scope -> parent_type = scope -> up -> parent_type;
+ scope -> exit_label = scope -> up -> exit_label;
}
ctx -> decl = scope;
ctx -> decl = scope -> up;
}
-static oberon_object_t *
-oberon_define_object(oberon_scope_t * scope, char * name, int class, int export, int read_only)
-{
- oberon_object_t * x = scope -> list;
- while(x -> next && strcmp(x -> next -> name, name) != 0)
- {
- x = x -> next;
- }
-
- if(x -> next)
- {
- oberon_error(scope -> ctx, "already defined");
- }
-
- oberon_object_t * newvar = malloc(sizeof *newvar);
- memset(newvar, 0, sizeof *newvar);
- newvar -> name = name;
- newvar -> class = class;
- newvar -> export = export;
- newvar -> read_only = read_only;
- newvar -> local = scope -> local;
- newvar -> parent = scope -> parent;
- newvar -> module = scope -> ctx -> mod;
-
- x -> next = newvar;
-
- return newvar;
-}
-
static oberon_object_t *
oberon_find_object_in_list(oberon_object_t * list, char * name)
{
}
static oberon_object_t *
-oberon_find_object(oberon_scope_t * scope, char * name, int check_it)
+oberon_find_object(oberon_scope_t * scope, char * name, bool check_it)
{
oberon_object_t * result = NULL;
}
static oberon_object_t *
-oberon_find_field(oberon_context_t * ctx, oberon_type_t * rec, char * name)
+oberon_find_object_in_scope(oberon_scope_t * scope, char * name, bool check_it)
{
- oberon_object_t * x = rec -> decl;
- for(int i = 0; i < rec -> num_decl; i++)
+ oberon_object_t * result = NULL;
+
+ result = oberon_find_object_in_list(scope -> list, name);
+
+ if(check_it && result == NULL)
{
- if(strcmp(x -> name, name) == 0)
- {
- return x;
- }
- x = x -> next;
+ oberon_error(scope -> ctx, "undefined ident %s", name);
}
- oberon_error(ctx, "field not defined");
+ return result;
+}
- return NULL;
+static oberon_object_t *
+oberon_create_object(oberon_scope_t * scope, char * name, int class, bool export, bool read_only)
+{
+ oberon_object_t * newvar = GC_MALLOC(sizeof *newvar);
+ memset(newvar, 0, sizeof *newvar);
+ newvar -> name = name;
+ newvar -> class = class;
+ newvar -> export = export;
+ newvar -> read_only = read_only;
+ newvar -> local = scope -> local;
+ newvar -> parent = scope -> parent;
+ newvar -> parent_type = scope -> parent_type;
+ newvar -> module = scope -> ctx -> mod;
+ return newvar;
}
static oberon_object_t *
-oberon_define_type(oberon_scope_t * scope, char * name, oberon_type_t * type, int export)
+oberon_define_object(oberon_scope_t * scope, char * name, int class, bool export, bool read_only, bool check_upscope)
{
- oberon_object_t * id;
- id = oberon_define_object(scope, name, OBERON_CLASS_TYPE, export, 0);
- id -> type = type;
- oberon_generator_init_type(scope -> ctx, type);
- return id;
+ if(check_upscope)
+ {
+ if(oberon_find_object(scope -> up, name, false))
+ {
+ oberon_error(scope -> ctx, "already defined");
+ }
+ }
+
+ oberon_object_t * x = scope -> list;
+ while(x -> next && strcmp(x -> next -> name, name) != 0)
+ {
+ x = x -> next;
+ }
+
+ if(x -> next)
+ {
+ oberon_error(scope -> ctx, "already defined");
+ }
+
+ oberon_object_t * newvar;
+ newvar = oberon_create_object(scope, name, class, export, read_only);
+ x -> next = newvar;
+
+ return newvar;
}
// =======================================================================
if(ctx -> code[ctx -> code_index])
{
ctx -> code_index += 1;
+ ctx -> xloc.col += 1;
ctx -> c = ctx -> code[ctx -> code_index];
}
}
static void
-oberon_init_scaner(oberon_context_t * ctx, const char * code)
+oberon_init_scaner(oberon_context_t * ctx, oberon_scanner_t * s)
{
- ctx -> code = code;
+ ctx -> code = s -> code;
ctx -> code_index = 0;
+ ctx -> xloc.source = s -> source;
+ ctx -> xloc.line = 1;
+ ctx -> xloc.col = 1;
+ ctx -> loc = ctx -> xloc;
ctx -> c = ctx -> code[ctx -> code_index];
+ oberon_set_line(ctx, 1);
}
static void
oberon_read_ident(oberon_context_t * ctx)
{
- int len = 0;
- int i = ctx -> code_index;
+ int start = ctx -> code_index;
- int c = ctx -> code[i];
- while(isalnum(c))
+ oberon_get_char(ctx);
+ while(isalnum(ctx -> c) || ctx -> c == '_')
{
- i += 1;
- len += 1;
- c = ctx -> code[i];
+ oberon_get_char(ctx);
}
- char * ident = malloc(len + 1);
- memcpy(ident, &ctx->code[ctx->code_index], len);
- ident[len] = 0;
+ int end = ctx -> code_index;
+
+ char * ident = GC_MALLOC(end - start + 1);
+ memcpy(ident, &ctx -> code[start], end - start);
+ ident[end - start] = 0;
- ctx -> code_index = i;
- ctx -> c = ctx -> code[i];
ctx -> string = ident;
ctx -> token = IDENT;
{
ctx -> token = BEGIN;
}
- else if(strcmp(ident, "TRUE") == 0)
- {
- ctx -> token = TRUE;
- }
- else if(strcmp(ident, "FALSE") == 0)
- {
- ctx -> token = FALSE;
- }
else if(strcmp(ident, "OR") == 0)
{
ctx -> token = OR;
{
ctx -> token = IMPORT;
}
+ else if(strcmp(ident, "IN") == 0)
+ {
+ ctx -> token = IN;
+ }
+ else if(strcmp(ident, "IS") == 0)
+ {
+ ctx -> token = IS;
+ }
+ else if(strcmp(ident, "IF") == 0)
+ {
+ ctx -> token = IF;
+ }
+ else if(strcmp(ident, "THEN") == 0)
+ {
+ ctx -> token = THEN;
+ }
+ else if(strcmp(ident, "ELSE") == 0)
+ {
+ ctx -> token = ELSE;
+ }
+ else if(strcmp(ident, "ELSIF") == 0)
+ {
+ ctx -> token = ELSIF;
+ }
+ else if(strcmp(ident, "WHILE") == 0)
+ {
+ ctx -> token = WHILE;
+ }
+ else if(strcmp(ident, "DO") == 0)
+ {
+ ctx -> token = DO;
+ }
+ else if(strcmp(ident, "REPEAT") == 0)
+ {
+ ctx -> token = REPEAT;
+ }
+ else if(strcmp(ident, "UNTIL") == 0)
+ {
+ ctx -> token = UNTIL;
+ }
+ else if(strcmp(ident, "FOR") == 0)
+ {
+ ctx -> token = FOR;
+ }
+ else if(strcmp(ident, "BY") == 0)
+ {
+ ctx -> token = BY;
+ }
+ else if(strcmp(ident, "LOOP") == 0)
+ {
+ ctx -> token = LOOP;
+ }
+ else if(strcmp(ident, "EXIT") == 0)
+ {
+ ctx -> token = EXIT;
+ }
+ else if(strcmp(ident, "CASE") == 0)
+ {
+ ctx -> token = CASE;
+ }
+ else if(strcmp(ident, "WITH") == 0)
+ {
+ ctx -> token = WITH;
+ }
}
+#define ISHEXDIGIT(x) \
+ (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
+
static void
oberon_read_number(oberon_context_t * ctx)
{
* mode = 1 == HEX
* mode = 2 == REAL
* mode = 3 == LONGREAL
+ * mode = 4 == CHAR
*/
int mode = 0;
start_i = ctx -> code_index;
end_i = ctx -> code_index;
- if(isxdigit(ctx -> c))
+ if(ISHEXDIGIT(ctx -> c))
{
mode = 1;
- while(isxdigit(ctx -> c))
+ while(ISHEXDIGIT(ctx -> c))
{
oberon_get_char(ctx);
}
end_i = ctx -> code_index;
- if(ctx -> c != 'H')
+ if(ctx -> c == 'H')
+ {
+ mode = 1;
+ oberon_get_char(ctx);
+ }
+ else if(ctx -> c == 'X')
+ {
+ mode = 4;
+ oberon_get_char(ctx);
+ }
+ else
{
oberon_error(ctx, "invalid hex number");
}
- oberon_get_char(ctx);
}
else if(ctx -> c == '.')
{
- mode = 2;
oberon_get_char(ctx);
-
- while(isdigit(ctx -> c))
+ if(ctx -> c == '.')
{
- oberon_get_char(ctx);
+ /* Чит: избегаем конфликта с DOTDOT */
+ ctx -> code_index -= 1;
}
-
- if(ctx -> c == 'E' || ctx -> c == 'D')
+ else
{
- exp_i = ctx -> code_index;
+ mode = 2;
- if(ctx -> c == 'D')
- {
- mode = 3;
- }
-
- oberon_get_char(ctx);
-
- if(ctx -> c == '+' || ctx -> c == '-')
+ while(isdigit(ctx -> c))
{
oberon_get_char(ctx);
}
- while(isdigit(ctx -> c))
+ if(ctx -> c == 'E' || ctx -> c == 'D')
{
+ exp_i = ctx -> code_index;
+
+ if(ctx -> c == 'D')
+ {
+ mode = 3;
+ }
+
oberon_get_char(ctx);
- }
- }
+ if(ctx -> c == '+' || ctx -> c == '-')
+ {
+ oberon_get_char(ctx);
+ }
+ while(isdigit(ctx -> c))
+ {
+ oberon_get_char(ctx);
+ }
+ }
+ }
end_i = ctx -> code_index;
}
+ if(mode == 0)
+ {
+ if(ctx -> c == 'H')
+ {
+ mode = 1;
+ oberon_get_char(ctx);
+ }
+ else if(ctx -> c == 'X')
+ {
+ mode = 4;
+ oberon_get_char(ctx);
+ }
+ }
+
int len = end_i - start_i;
- ident = malloc(len + 1);
+ ident = GC_MALLOC(len + 1);
memcpy(ident, &ctx -> code[start_i], len);
ident[len] = 0;
+ ctx -> longmode = false;
if(mode == 3)
{
int i = exp_i - start_i;
ident[i] = 'E';
+ ctx -> longmode = true;
}
switch(mode)
case 2:
case 3:
sscanf(ident, "%lf", &real);
+ integer = real;
ctx -> token = REAL;
break;
+ case 4:
+ sscanf(ident, "%lx", &integer);
+ real = integer;
+ ctx -> token = CHAR;
+ break;
default:
oberon_error(ctx, "oberon_read_number: wat");
break;
ctx -> real = real;
}
+static void
+oberon_get_lined_char(oberon_context_t * ctx)
+{
+ do
+ {
+ if(ctx -> c == 0xD)
+ {
+ oberon_get_char(ctx);
+ if(ctx -> c == 0xA)
+ {
+ oberon_get_char(ctx);
+ }
+ ctx -> xloc.line += 1;
+ ctx -> xloc.col = 1;
+ oberon_set_line(ctx, ctx -> xloc.line);
+ }
+ else if(ctx -> c == 0xA)
+ {
+ oberon_get_char(ctx);
+ ctx -> xloc.line += 1;
+ ctx -> xloc.col = 1;
+ oberon_set_line(ctx, ctx -> xloc.line);
+ }
+ else
+ {
+ oberon_get_char(ctx);
+ }
+ } while(ctx -> c == 0xD || ctx -> c == 0xA);
+}
+
static void
oberon_skip_space(oberon_context_t * ctx)
{
while(isspace(ctx -> c))
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
}
}
{
if(ctx -> c == '(')
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
if(ctx -> c == '*')
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
nesting += 1;
}
}
else if(ctx -> c == '*')
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
if(ctx -> c == ')')
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
nesting -= 1;
}
}
}
else
{
- oberon_get_char(ctx);
+ oberon_get_lined_char(ctx);
}
}
}
+static void oberon_read_string(oberon_context_t * ctx)
+{
+ int c = ctx -> c;
+ oberon_get_char(ctx);
+
+ int start = ctx -> code_index;
+
+ while(ctx -> c != 0 && ctx -> c != c)
+ {
+ oberon_get_char(ctx);
+ }
+
+ if(ctx -> c == 0)
+ {
+ oberon_error(ctx, "unterminated string");
+ }
+
+ int end = ctx -> code_index;
+
+ oberon_get_char(ctx);
+
+ char * string = GC_MALLOC(end - start + 1);
+ strncpy(string, &ctx -> code[start], end - start);
+ string[end - start] = 0;
+
+ ctx -> token = STRING;
+ ctx -> string = string;
+ ctx -> integer = string[0];
+}
+
static void oberon_read_token(oberon_context_t * ctx);
static void
case '.':
ctx -> token = DOT;
oberon_get_char(ctx);
+ if(ctx -> c == '.')
+ {
+ ctx -> token = DOTDOT;
+ oberon_get_char(ctx);
+ }
break;
case '(':
ctx -> token = LPAREN;
oberon_get_char(ctx);
break;
case '[':
- ctx -> token = LBRACE;
+ ctx -> token = LBRACK;
oberon_get_char(ctx);
break;
case ']':
- ctx -> token = RBRACE;
+ ctx -> token = RBRACK;
oberon_get_char(ctx);
break;
case '^':
ctx -> token = UPARROW;
oberon_get_char(ctx);
break;
+ case '"':
+ oberon_read_string(ctx);
+ break;
+ case '\'':
+ oberon_read_string(ctx);
+ break;
+ case '{':
+ ctx -> token = LBRACE;
+ oberon_get_char(ctx);
+ break;
+ case '}':
+ ctx -> token = RBRACE;
+ oberon_get_char(ctx);
+ break;
+ case '|':
+ ctx -> token = BAR;
+ oberon_get_char(ctx);
+ break;
default:
oberon_error(ctx, "invalid char %c", ctx -> c);
break;
{
oberon_skip_space(ctx);
+ ctx -> loc = ctx -> xloc;
+
int c = ctx -> c;
- if(isalpha(c))
+ if(isalpha(c) || c == '_')
{
oberon_read_ident(ctx);
}
static char * oberon_assert_ident(oberon_context_t * ctx);
static void oberon_type(oberon_context_t * ctx, oberon_type_t ** type);
static oberon_item_t * oberon_const_expr(oberon_context_t * ctx);
-
-static oberon_expr_t *
-oberon_new_operator(int op, oberon_type_t * result, oberon_expr_t * left, oberon_expr_t * right)
-{
- oberon_oper_t * operator;
- operator = malloc(sizeof *operator);
- memset(operator, 0, sizeof *operator);
-
- operator -> is_item = 0;
- operator -> result = result;
- operator -> read_only = 1;
- operator -> op = op;
- operator -> left = left;
- operator -> right = right;
-
- return (oberon_expr_t *) operator;
-}
-
-static oberon_expr_t *
-oberon_new_item(int mode, oberon_type_t * result, int read_only)
-{
- oberon_item_t * item;
- item = malloc(sizeof *item);
- memset(item, 0, sizeof *item);
-
- item -> is_item = 1;
- item -> result = result;
- item -> read_only = read_only;
- item -> mode = mode;
-
- return (oberon_expr_t *)item;
-}
+static oberon_expr_t * oberno_make_dereferencing(oberon_context_t * ctx, oberon_expr_t * expr);
+static bool oberon_is_const(oberon_expr_t * expr);
static oberon_expr_t *
oberon_make_unary_op(oberon_context_t * ctx, int token, oberon_expr_t * a)
if(token == MINUS)
{
- if(result -> class != OBERON_TYPE_INTEGER)
+ if(result -> class == OBERON_TYPE_SET)
+ {
+ if(oberon_is_const(a))
+ {
+ expr = oberon_make_set(ctx, ~(a -> item.integer));
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_COMPLEMENTATION, result, a, NULL);
+ }
+ }
+ else if(result -> class == OBERON_TYPE_INTEGER)
+ {
+ if(oberon_is_const(a))
+ {
+ expr = oberon_make_integer(ctx, -(a -> item.integer));
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_UNARY_MINUS, result, a, NULL);
+ }
+ }
+ else if(result -> class == OBERON_TYPE_REAL)
+ {
+ if(oberon_is_const(a))
+ {
+ expr = oberon_make_real_typed(ctx, -(a -> item.real), result);
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_UNARY_MINUS, result, a, NULL);
+ }
+ }
+ else
{
oberon_error(ctx, "incompatible operator type");
}
-
- expr = oberon_new_operator(OP_UNARY_MINUS, result, a, NULL);
}
else if(token == NOT)
{
oberon_error(ctx, "incompatible operator type");
}
- expr = oberon_new_operator(OP_LOGIC_NOT, result, a, NULL);
+ if(oberon_is_const(a))
+ {
+ expr = oberon_make_boolean(ctx, !(a -> item.integer));
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_LOGIC_NOT, result, a, NULL);
+ }
}
else
{
@@ -743,7 +1067,14 @@ oberon_expr_list(oberon_context_t * ctx, int * num_expr, oberon_expr_t ** first,
oberon_expr_t * last;
*num_expr = 1;
- *first = last = oberon_expr(ctx);
+ if(const_expr)
+ {
+ *first = last = (oberon_expr_t *) oberon_const_expr(ctx);
+ }
+ else
+ {
+ *first = last = oberon_expr(ctx);
+ }
while(ctx -> token == COMMA)
{
oberon_assert_token(ctx, COMMA);
@@ -765,70 +1096,91 @@ oberon_expr_list(oberon_context_t * ctx, int * num_expr, oberon_expr_t ** first,
}
static oberon_expr_t *
-oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
+oberon_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
{
- if(pref -> class != expr -> result -> class)
+ oberon_expr_t * cast;
+
+ if((oberon_is_char_type(pref) && oberon_is_const_string(expr) && strlen(expr -> item.string) == 1))
{
- if(pref -> class != OBERON_TYPE_PROCEDURE)
- {
- if(expr -> result -> class != OBERON_TYPE_POINTER)
- {
- oberon_error(ctx, "incompatible types");
- }
- }
+ /* Автоматически преобразуем строку единичного размера в символ */
+ cast = oberon_new_item(MODE_CHAR, ctx -> char_type, true);
+ cast -> item.integer = expr -> item.string[0];
}
-
- if(pref -> class == OBERON_TYPE_INTEGER)
+ else if(oberon_is_record_type(pref) || oberon_is_pointer_to_record(pref))
{
- if(expr -> result -> class > pref -> class)
- {
- oberon_error(ctx, "incompatible size");
- }
+ assert(expr -> is_item);
+ cast = oberon_new_item(MODE_AS, pref, expr -> read_only);
+ cast -> item.parent = (oberon_item_t *) expr;
}
- else if(pref -> class == OBERON_TYPE_RECORD)
+ else if(!oberon_is_some_types(expr -> result, pref))
{
- if(expr -> result != pref)
- {
- printf("oberon_autocast_to: rec %p != %p\n", expr -> result, pref);
- oberon_error(ctx, "incompatible record types");
- }
+ cast = oberon_new_operator(OP_CAST, pref, expr, NULL);
}
- else if(pref -> class == OBERON_TYPE_POINTER)
+ else
{
- if(expr -> result -> base != pref -> base)
- {
- if(expr -> result -> base -> class != OBERON_TYPE_VOID)
- {
- oberon_error(ctx, "incompatible pointer types");
- }
- }
+ cast = expr;
}
- // TODO cast
+ return cast;
+}
- return expr;
+static oberon_expr_t *
+oberon_hard_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
+{
+ return oberon_new_operator(OP_HARDCAST, pref, expr, NULL);
}
static void
-oberon_autocast_call(oberon_context_t * ctx, oberon_expr_t * desig)
+oberon_check_dst(oberon_context_t * ctx, oberon_expr_t * dst)
{
- if(desig -> is_item == 0)
+ if(dst -> read_only)
{
- oberon_error(ctx, "expected item");
+ oberon_error(ctx, "read-only destination");
}
- if(desig -> item.mode != MODE_CALL)
+ if(dst -> is_item == false)
{
- oberon_error(ctx, "expected mode CALL");
+ oberon_error(ctx, "not variable");
+ }
+
+ switch(dst -> item.mode)
+ {
+ case MODE_VAR:
+ case MODE_CALL:
+ case MODE_INDEX:
+ case MODE_FIELD:
+ case MODE_DEREF:
+ case MODE_NEW:
+ /* accept */
+ break;
+ default:
+ oberon_error(ctx, "not variable");
+ break;
}
+}
+
+static void
+oberon_check_src(oberon_context_t * ctx, oberon_expr_t * src)
+{
+ if(src -> is_item)
+ {
+ if(src -> item.mode == MODE_TYPE)
+ {
+ oberon_error(ctx, "not variable");
+ }
+ }
+}
- if(desig -> item.var -> type -> class != OBERON_TYPE_PROCEDURE)
+static void
+oberon_autocast_call(oberon_context_t * ctx, oberon_item_t * desig)
+{
+ if(desig -> mode != MODE_CALL)
{
- oberon_error(ctx, "only procedures can be called");
+ oberon_error(ctx, "expected mode CALL");
}
- oberon_type_t * fn = desig -> item.var -> type;
- int num_args = desig -> item.num_args;
+ oberon_type_t * fn = desig -> parent -> result;
+ int num_args = desig -> num_args;
int num_decl = fn -> num_decl;
if(num_args < num_decl)
oberon_error(ctx, "too many arguments");
}
- oberon_expr_t * arg = desig -> item.args;
+ /* Делаем проверку на запись и делаем автокаст */
+ oberon_expr_t * casted[num_args];
+ oberon_expr_t * arg = desig -> args;
oberon_object_t * param = fn -> decl;
for(int i = 0; i < num_args; i++)
{
if(param -> class == OBERON_CLASS_VAR_PARAM)
{
- if(arg -> read_only)
+ oberon_check_dst(ctx, arg);
+ if(!oberon_is_compatible_arrays(param, arg))
+ {
+ oberon_check_compatible_var_param(ctx, param -> type, arg -> result);
+ }
+ casted[i] = arg;
+ //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
+ }
+ else
+ {
+ oberon_check_src(ctx, arg);
+ if(!oberon_is_compatible_arrays(param, arg))
{
- oberon_error(ctx, "assign to read-only var");
+ oberon_check_assignment_compatible(ctx, arg, param -> type);
}
+ casted[i] = oberon_cast_expr(ctx, arg, param -> type);
+ }
- //if(arg -> is_item)
- //{
- // switch(arg -> item.mode)
- // {
- // case MODE_VAR:
- // case MODE_INDEX:
- // case MODE_FIELD:
- // // Допустимо разыменование?
- // //case MODE_DEREF:
- // break;
- // default:
- // oberon_error(ctx, "var-parameter accept only variables");
- // break;
- // }
- //}
- }
- oberon_autocast_to(ctx, arg, param -> type);
arg = arg -> next;
param = param -> next;
}
+
+ /* Создаём новый список выражений */
+ if(num_args > 0)
+ {
+ arg = casted[0];
+ for(int i = 0; i < num_args - 1; i++)
+ {
+ casted[i] -> next = casted[i + 1];
+ }
+ desig -> args = arg;
+ }
}
static oberon_expr_t *
-oberon_make_call_func(oberon_context_t * ctx, oberon_object_t * proc, int num_args, oberon_expr_t * list_args)
+oberon_make_call_func(oberon_context_t * ctx, oberon_item_t * item, int num_args, oberon_expr_t * list_args)
{
- switch(proc -> class)
+ oberon_type_t * signature = item -> result;
+ if(signature -> class != OBERON_TYPE_PROCEDURE)
{
- case OBERON_CLASS_PROC:
- if(proc -> class != OBERON_CLASS_PROC)
- {
- oberon_error(ctx, "not a procedure");
- }
- break;
- case OBERON_CLASS_VAR:
- case OBERON_CLASS_VAR_PARAM:
- case OBERON_CLASS_PARAM:
- if(proc -> type -> class != OBERON_TYPE_PROCEDURE)
- {
- oberon_error(ctx, "not a procedure");
- }
- break;
- default:
- oberon_error(ctx, "not a procedure");
- break;
+ oberon_error(ctx, "not a procedure");
}
oberon_expr_t * call;
- if(proc -> sysproc)
+ if(signature -> sysproc)
{
- if(proc -> genfunc == NULL)
+ if(signature -> genfunc == NULL)
{
oberon_error(ctx, "not a function-procedure");
}
- call = proc -> genfunc(ctx, num_args, list_args);
+ call = signature -> genfunc(ctx, num_args, list_args);
}
else
{
- if(proc -> type -> base -> class == OBERON_TYPE_VOID)
+ if(signature -> base -> class == OBERON_TYPE_NOTYPE)
{
oberon_error(ctx, "attempt to call procedure in expression");
}
- call = oberon_new_item(MODE_CALL, proc -> type -> base, 1);
- call -> item.var = proc;
+ call = oberon_new_item(MODE_CALL, signature -> base, true);
+ call -> item.parent = item;
call -> item.num_args = num_args;
call -> item.args = list_args;
- oberon_autocast_call(ctx, call);
+ oberon_autocast_call(ctx, (oberon_item_t *) call);
}
return call;
}
static void
-oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_args, oberon_expr_t * list_args)
+oberon_make_call_proc(oberon_context_t * ctx, oberon_item_t * item, int num_args, oberon_expr_t * list_args)
{
- switch(proc -> class)
+ oberon_type_t * signature = item -> result;
+ if(signature -> class != OBERON_TYPE_PROCEDURE)
{
- case OBERON_CLASS_PROC:
- if(proc -> class != OBERON_CLASS_PROC)
- {
- oberon_error(ctx, "not a procedure");
- }
- break;
- case OBERON_CLASS_VAR:
- case OBERON_CLASS_VAR_PARAM:
- case OBERON_CLASS_PARAM:
- if(proc -> type -> class != OBERON_TYPE_PROCEDURE)
- {
- oberon_error(ctx, "not a procedure");
- }
- break;
- default:
- oberon_error(ctx, "not a procedure");
- break;
+ oberon_error(ctx, "not a procedure");
}
- if(proc -> sysproc)
+ oberon_expr_t * call;
+
+ if(signature -> sysproc)
{
- if(proc -> genproc == NULL)
+ if(signature -> genproc == NULL)
{
- oberon_error(ctx, "requres non-typed procedure");
+ oberon_error(ctx, "not a procedure");
}
- proc -> genproc(ctx, num_args, list_args);
+ signature -> genproc(ctx, num_args, list_args);
}
else
{
- if(proc -> type -> base -> class != OBERON_TYPE_VOID)
+ if(signature -> base -> class != OBERON_TYPE_NOTYPE)
{
oberon_error(ctx, "attempt to call function as non-typed procedure");
}
- oberon_expr_t * call;
- call = oberon_new_item(MODE_CALL, proc -> type -> base, 1);
- call -> item.var = proc;
+ call = oberon_new_item(MODE_CALL, signature -> base, true);
+ call -> item.parent = item;
call -> item.num_args = num_args;
call -> item.args = list_args;
- oberon_autocast_call(ctx, call);
+ oberon_autocast_call(ctx, (oberon_item_t *) call);
oberon_generate_call_proc(ctx, call);
}
}
@@ -980,10 +1312,13 @@ oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_ar
|| ((x) == MINUS) \
|| ((x) == IDENT) \
|| ((x) == INTEGER) \
+ || ((x) == REAL) \
+ || ((x) == CHAR) \
+ || ((x) == STRING) \
+ || ((x) == NIL) \
+ || ((x) == LBRACE) \
|| ((x) == LPAREN) \
- || ((x) == NOT) \
- || ((x) == TRUE) \
- || ((x) == FALSE))
+ || ((x) == NOT))
static oberon_expr_t *
oberno_make_dereferencing(oberon_context_t * ctx, oberon_expr_t * expr)
assert(expr -> is_item);
oberon_expr_t * selector;
- selector = oberon_new_item(MODE_DEREF, expr -> result -> base, expr -> read_only);
+ selector = oberon_new_item(MODE_DEREF, expr -> result -> base, false);
selector -> item.parent = (oberon_item_t *) expr;
return selector;
@@ -1059,7 +1394,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
expr = oberno_make_dereferencing(ctx, expr);
}
- assert(expr -> is_item == 1);
+ assert(expr -> is_item);
if(expr -> result -> class != OBERON_TYPE_RECORD)
{
@@ -1069,7 +1404,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
oberon_type_t * rec = expr -> result;
oberon_object_t * field;
- field = oberon_find_field(ctx, rec, name);
+ field = oberon_find_object(rec -> scope, name, true);
if(field -> export == 0)
{
@@ -1079,7 +1414,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
}
}
- int read_only = 0;
+ int read_only = expr -> read_only;
if(field -> read_only)
{
if(field -> module != ctx -> mod)
@@ -1097,9 +1432,10 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
}
#define ISSELECTOR(x) \
- (((x) == LBRACE) \
+ (((x) == LBRACK) \
|| ((x) == DOT) \
- || ((x) == UPARROW))
+ || ((x) == UPARROW) \
+ || ((x) == LPAREN))
static oberon_object_t *
oberon_qualident(oberon_context_t * ctx, char ** xname, int check)
}
static oberon_expr_t *
-oberon_designator(oberon_context_t * ctx)
+oberon_ident_item(oberon_context_t * ctx, char * name)
+{
+ bool read_only;
+ oberon_object_t * x;
+ oberon_expr_t * expr;
+
+ x = oberon_find_object(ctx -> decl, name, true);
+
+ read_only = false;
+ if(x -> class == OBERON_CLASS_CONST || x -> class == OBERON_CLASS_PROC)
+ {
+ read_only = true;
+ }
+
+ expr = oberon_new_item(MODE_VAR, x -> type, read_only);
+ expr -> item.var = x;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_qualident_expr(oberon_context_t * ctx)
{
- char * name;
oberon_object_t * var;
oberon_expr_t * expr;
// TODO copy value
expr = (oberon_expr_t *) var -> value;
break;
+ case OBERON_CLASS_TYPE:
+ expr = oberon_new_item(MODE_TYPE, var -> type, read_only);
+ break;
case OBERON_CLASS_VAR:
case OBERON_CLASS_VAR_PARAM:
case OBERON_CLASS_PARAM:
expr = oberon_new_item(MODE_VAR, var -> type, read_only);
break;
case OBERON_CLASS_PROC:
- expr = oberon_new_item(MODE_VAR, var -> type, 1);
+ expr = oberon_new_item(MODE_VAR, var -> type, true);
break;
default:
oberon_error(ctx, "invalid designator");
break;
}
+
expr -> item.var = var;
- while(ISSELECTOR(ctx -> token))
- {
- switch(ctx -> token)
- {
- case DOT:
- oberon_assert_token(ctx, DOT);
- name = oberon_assert_ident(ctx);
- expr = oberon_make_record_selector(ctx, expr, name);
- break;
- case LBRACE:
- oberon_assert_token(ctx, LBRACE);
- int num_indexes = 0;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_designator(oberon_context_t * ctx)
+{
+ char * name;
+ oberon_expr_t * expr;
+ oberon_object_t * objtype;
+
+ expr = oberon_qualident_expr(ctx);
+
+ while(expr -> result -> class != OBERON_TYPE_PROCEDURE && ISSELECTOR(ctx -> token))
+ {
+ switch(ctx -> token)
+ {
+ case DOT:
+ oberon_assert_token(ctx, DOT);
+ name = oberon_assert_ident(ctx);
+ expr = oberon_make_record_selector(ctx, expr, name);
+ break;
+ case LBRACK:
+ oberon_assert_token(ctx, LBRACK);
+ int num_indexes = 0;
oberon_expr_t * indexes = NULL;
oberon_expr_list(ctx, &num_indexes, &indexes, 0);
- oberon_assert_token(ctx, RBRACE);
+ oberon_assert_token(ctx, RBRACK);
for(int i = 0; i < num_indexes; i++)
{
oberon_assert_token(ctx, UPARROW);
expr = oberno_make_dereferencing(ctx, expr);
break;
+ case LPAREN:
+ oberon_assert_token(ctx, LPAREN);
+ objtype = oberon_qualident(ctx, NULL, true);
+ oberon_assert_token(ctx, RPAREN);
+ oberon_check_extension_of(ctx, expr -> result, objtype -> type);
+ expr = oberon_cast_expr(ctx, expr, objtype -> type);
+ break;
default:
oberon_error(ctx, "oberon_designator: wat");
break;
}
}
+
return expr;
}
static oberon_expr_t *
oberon_opt_func_parens(oberon_context_t * ctx, oberon_expr_t * expr)
{
- assert(expr -> is_item == 1);
-
/* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
if(ctx -> token == LPAREN)
{
oberon_expr_list(ctx, &num_args, &arguments, 0);
}
- expr = oberon_make_call_func(ctx, expr -> item.var, num_args, arguments);
+ assert(expr -> is_item == 1);
+ expr = oberon_make_call_func(ctx, (oberon_item_t *) expr, num_args, arguments);
oberon_assert_token(ctx, RPAREN);
}
static void
oberon_opt_proc_parens(oberon_context_t * ctx, oberon_expr_t * expr)
{
- assert(expr -> is_item == 1);
+ assert(expr -> is_item);
int num_args = 0;
oberon_expr_t * arguments = NULL;
}
/* Вызов происходит даже без скобок */
- oberon_make_call_proc(ctx, expr -> item.var, num_args, arguments);
+ oberon_make_call_proc(ctx, (oberon_item_t *) expr, num_args, arguments);
+}
+
+static oberon_expr_t *
+oberon_element(oberon_context_t * ctx)
+{
+ oberon_expr_t * e1;
+ oberon_expr_t * e2;
+
+ e1 = oberon_expr(ctx);
+ oberon_check_src(ctx, e1);
+ if(e1 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ e2 = NULL;
+ if(ctx -> token == DOTDOT)
+ {
+ oberon_assert_token(ctx, DOTDOT);
+ e2 = oberon_expr(ctx);
+ oberon_check_src(ctx, e2);
+ if(e2 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+ }
+
+ oberon_expr_t * set;
+ if(e2 == NULL && oberon_is_const(e1))
+ {
+ set = oberon_make_set_index(ctx, e1 -> item.integer);
+ }
+ else if(e2 != NULL && oberon_is_const(e1) && oberon_is_const(e2))
+ {
+ set = oberon_make_set_range(ctx, e1 -> item.integer, e2 -> item.integer);
+ }
+ else
+ {
+ set = oberon_new_operator(OP_RANGE, ctx -> set_type, e1, e2);
+ }
+ return set;
+}
+
+static oberon_expr_t *
+oberon_make_set_union(oberon_context_t * ctx, oberon_expr_t * a, oberon_expr_t * b)
+{
+ if(oberon_is_const(a) && oberon_is_const(b))
+ {
+ return oberon_make_set(ctx, (a -> item.integer | b -> item.integer));
+ }
+ else
+ {
+ return oberon_new_operator(OP_UNION, ctx -> set_type, a, b);
+ }
+}
+
+static oberon_expr_t *
+oberon_set(oberon_context_t * ctx)
+{
+ oberon_expr_t * set;
+ oberon_expr_t * elements;
+ set = oberon_make_set(ctx, 0);
+
+ oberon_assert_token(ctx, LBRACE);
+ if(ISEXPR(ctx -> token))
+ {
+ elements = oberon_element(ctx);
+ set = oberon_make_set_union(ctx, set, elements);
+ while(ctx -> token == COMMA)
+ {
+ oberon_assert_token(ctx, COMMA);
+ elements = oberon_element(ctx);
+ set = oberon_make_set_union(ctx, set, elements);
+ }
+ }
+ oberon_assert_token(ctx, RBRACE);
+
+ return set;
}
static oberon_expr_t *
oberon_factor(oberon_context_t * ctx)
{
oberon_expr_t * expr;
+ oberon_type_t * result;
switch(ctx -> token)
{
expr = oberon_opt_func_parens(ctx, expr);
break;
case INTEGER:
- expr = oberon_new_item(MODE_INTEGER, ctx -> int_type, 1);
- expr -> item.integer = ctx -> integer;
+ expr = oberon_make_integer(ctx, ctx -> integer);
oberon_assert_token(ctx, INTEGER);
break;
+ case CHAR:
+ result = ctx -> char_type;
+ expr = oberon_new_item(MODE_CHAR, result, true);
+ expr -> item.integer = ctx -> integer;
+ oberon_assert_token(ctx, CHAR);
+ break;
+ case STRING:
+ expr = oberon_make_string(ctx, ctx -> string);
+ oberon_assert_token(ctx, STRING);
+ break;
case REAL:
- expr = oberon_new_item(MODE_REAL, ctx -> real_type, 1);
- expr -> item.real = ctx -> real;
+ expr = oberon_make_real(ctx, ctx -> real, ctx -> longmode);
oberon_assert_token(ctx, REAL);
break;
- case TRUE:
- expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, 1);
- expr -> item.boolean = 1;
- oberon_assert_token(ctx, TRUE);
- break;
- case FALSE:
- expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, 1);
- expr -> item.boolean = 0;
- oberon_assert_token(ctx, FALSE);
+ case LBRACE:
+ expr = oberon_set(ctx);
break;
case LPAREN:
oberon_assert_token(ctx, LPAREN);
break;
case NIL:
oberon_assert_token(ctx, NIL);
- expr = oberon_new_item(MODE_NIL, ctx -> void_ptr_type, 1);
+ expr = oberon_new_item(MODE_NIL, ctx -> nil_type, true);
break;
default:
oberon_error(ctx, "invalid expression");
return expr;
}
-/*
- * oberon_autocast_binary_op автоматически переобразовывеат тип по след. правилам:
- * 1. Классы обоих типов должны быть одинаковы
- * 2. В качестве результата должен быть выбран больший тип.
- * 3. Если размер результат не должен быть меньше чем базовый int
- */
-
-static void
-oberon_autocast_binary_op(oberon_context_t * ctx, oberon_type_t * a, oberon_type_t * b, oberon_type_t ** result)
-{
- if((a -> class) != (b -> class))
- {
- oberon_error(ctx, "incompatible types");
- }
-
- if((a -> size) > (b -> size))
- {
- *result = a;
- }
- else
- {
- *result = b;
- }
-
- if(((*result) -> class) == OBERON_TYPE_INTEGER)
- {
- if(((*result) -> size) < (ctx -> int_type -> size))
- {
- *result = ctx -> int_type;
- }
- }
-
- /* TODO: cast types */
-}
-
-#define ITMAKESBOOLEAN(x) \
- (((x) >= EQUAL && (x) <= GEQ) || ((x) == OR) || ((x) == AND))
-
-#define ITUSEONLYINTEGER(x) \
- ((x) >= LESS && (x) <= GEQ)
-
-#define ITUSEONLYBOOLEAN(x) \
- (((x) == OR) || ((x) == AND))
-
static oberon_expr_t *
oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_expr_t * b)
{
oberon_expr_t * expr;
oberon_type_t * result;
- if(ITMAKESBOOLEAN(token))
+ oberon_check_compatible_bin_expr(ctx, token, a, b);
+ oberon_check_src(ctx, a);
+ if(token != IS)
{
- if(ITUSEONLYINTEGER(token))
- {
- if(a -> result -> class != OBERON_TYPE_INTEGER
- || b -> result -> class != OBERON_TYPE_INTEGER)
- {
- oberon_error(ctx, "used only with integer types");
- }
- }
- else if(ITUSEONLYBOOLEAN(token))
- {
- if(a -> result -> class != OBERON_TYPE_BOOLEAN
- || b -> result -> class != OBERON_TYPE_BOOLEAN)
- {
- oberon_error(ctx, "used only with boolean type");
- }
- }
-
- result = ctx -> bool_type;
+ oberon_check_src(ctx, b);
+ }
- if(token == EQUAL)
- {
- expr = oberon_new_operator(OP_EQ, result, a, b);
- }
- else if(token == NEQ)
+ if(token == IN)
+ {
+ if(oberon_is_const(a) && oberon_is_const(b))
{
- expr = oberon_new_operator(OP_NEQ, result, a, b);
+ expr = oberon_make_boolean(ctx, (1 << a -> item.integer) & b -> item.integer);
}
- else if(token == LESS)
+ else
{
- expr = oberon_new_operator(OP_LSS, result, a, b);
+ expr = oberon_new_operator(OP_IN, ctx -> bool_type, a, b);
}
- else if(token == LEQ)
+ }
+ else if(token == IS)
+ {
+ oberon_check_type_expr(ctx, b);
+ expr = oberon_new_operator(OP_IS, ctx -> bool_type, a, b);
+ }
+ else if((token >= EQUAL && token <= GEQ) || token == OR || token == AND)
+ {
+ if(oberon_is_string_of_one(a) && oberon_is_char_type(b -> result))
{
- expr = oberon_new_operator(OP_LEQ, result, a, b);
+ result = b -> result;
}
- else if(token == GREAT)
+ else if(oberon_is_string_of_one(b) && oberon_is_char_type(a -> result))
{
- expr = oberon_new_operator(OP_GRT, result, a, b);
+ result = a -> result;
}
- else if(token == GEQ)
+ else if(oberon_is_string_of_one(a) && oberon_is_string_of_one(b))
{
- expr = oberon_new_operator(OP_GEQ, result, a, b);
+ result = ctx -> char_type;
}
- else if(token == OR)
+ else
{
- expr = oberon_new_operator(OP_LOGIC_OR, result, a, b);
+ result = oberon_get_longer_type(ctx, a -> result, b -> result);
}
- else if(token == AND)
+
+ if(oberon_is_const(a) && oberon_is_const(b)
+ && (oberon_is_real_type(result) || oberon_is_integer_type(result)))
{
- expr = oberon_new_operator(OP_LOGIC_AND, result, a, b);
+ if(oberon_is_real_type(result))
+ {
+ double x = a -> item.real;
+ double y = b -> item.real;
+ switch(token)
+ {
+ case EQUAL: expr = oberon_make_boolean(ctx, x == y); break;
+ case NEQ: expr = oberon_make_boolean(ctx, x != y); break;
+ case LESS: expr = oberon_make_boolean(ctx, x < y); break;
+ case LEQ: expr = oberon_make_boolean(ctx, x <= y); break;
+ case GREAT: expr = oberon_make_boolean(ctx, x > y); break;
+ case GEQ: expr = oberon_make_boolean(ctx, x >= y); break;
+ case OR: expr = oberon_make_boolean(ctx, x || y); break;
+ case AND: expr = oberon_make_boolean(ctx, x && y); break;
+ default: assert(0); break;
+ }
+ }
+ else if(oberon_is_integer_type(result))
+ {
+ int64_t x = a -> item.integer;
+ int64_t y = b -> item.integer;
+ switch(token)
+ {
+ case EQUAL: expr = oberon_make_boolean(ctx, x == y); break;
+ case NEQ: expr = oberon_make_boolean(ctx, x != y); break;
+ case LESS: expr = oberon_make_boolean(ctx, x < y); break;
+ case LEQ: expr = oberon_make_boolean(ctx, x <= y); break;
+ case GREAT: expr = oberon_make_boolean(ctx, x > y); break;
+ case GEQ: expr = oberon_make_boolean(ctx, x >= y); break;
+ case OR: expr = oberon_make_boolean(ctx, x || y); break;
+ case AND: expr = oberon_make_boolean(ctx, x && y); break;
+ default: assert(0); break;
+ }
+ }
+ else
+ {
+ assert(0);
+ }
}
else
{
- oberon_error(ctx, "oberon_make_bin_op: bool wat");
+ a = oberon_cast_expr(ctx, a, result);
+ b = oberon_cast_expr(ctx, b, result);
+ result = ctx -> bool_type;
+ switch(token)
+ {
+ case EQUAL: expr = oberon_new_operator(OP_EQ, result, a, b); break;
+ case NEQ: expr = oberon_new_operator(OP_NEQ, result, a, b); break;
+ case LESS: expr = oberon_new_operator(OP_LSS, result, a, b); break;
+ case LEQ: expr = oberon_new_operator(OP_LEQ, result, a, b); break;
+ case GREAT: expr = oberon_new_operator(OP_GRT, result, a, b); break;
+ case GEQ: expr = oberon_new_operator(OP_GEQ, result, a, b); break;
+ case OR: expr = oberon_new_operator(OP_LOGIC_OR, result, a, b); break;
+ case AND: expr = oberon_new_operator(OP_LOGIC_AND, result, a, b); break;
+ default: assert(0); break;
+ }
}
}
else if(token == SLASH)
{
- if(a -> result -> class != OBERON_TYPE_REAL)
+ if(oberon_is_set_type(a -> result) && oberon_is_set_type(b -> result))
{
- if(a -> result -> class == OBERON_TYPE_INTEGER)
+ if(oberon_is_const(a) && oberon_is_const(b))
{
- oberon_error(ctx, "TODO cast int -> real");
+ int64_t x = a -> item.integer;
+ int64_t y = b -> item.integer;
+ expr = oberon_make_set(ctx, x ^ y);
}
else
{
- oberon_error(ctx, "operator / requires numeric type");
+ result = oberon_get_longer_type(ctx, a -> result, b -> result);
+ a = oberon_cast_expr(ctx, a, result);
+ b = oberon_cast_expr(ctx, b, result);
+ expr = oberon_new_operator(OP_SYM_DIFFERENCE, result, a, b);
}
}
-
- if(b -> result -> class != OBERON_TYPE_REAL)
+ else
{
- if(b -> result -> class == OBERON_TYPE_INTEGER)
+ result = oberon_get_longer_real_type(ctx, a -> result, b -> result);
+ if(oberon_is_const(a) && oberon_is_const(b))
{
- oberon_error(ctx, "TODO cast int -> real");
+ double x = a -> item.real;
+ double y = b -> item.real;
+ expr = oberon_make_real_typed(ctx, x / y, result);
}
else
{
- oberon_error(ctx, "operator / requires numeric type");
+ a = oberon_cast_expr(ctx, a, result);
+ b = oberon_cast_expr(ctx, b, result);
+ expr = oberon_new_operator(OP_DIV, result, a, b);
}
}
-
- oberon_autocast_binary_op(ctx, a -> result, b -> result, &result);
- expr = oberon_new_operator(OP_DIV, result, a, b);
- }
- else if(token == DIV)
- {
- if(a -> result -> class != OBERON_TYPE_INTEGER
- || b -> result -> class != OBERON_TYPE_INTEGER)
- {
- oberon_error(ctx, "operator DIV requires integer type");
- }
-
- oberon_autocast_binary_op(ctx, a -> result, b -> result, &result);
- expr = oberon_new_operator(OP_DIV, result, a, b);
}
else
{
- oberon_autocast_binary_op(ctx, a -> result, b -> result, &result);
+ result = oberon_get_longer_type(ctx, a -> result, b -> result);
- if(token == PLUS)
- {
- expr = oberon_new_operator(OP_ADD, result, a, b);
- }
- else if(token == MINUS)
- {
- expr = oberon_new_operator(OP_SUB, result, a, b);
- }
- else if(token == STAR)
- {
- expr = oberon_new_operator(OP_MUL, result, a, b);
- }
- else if(token == MOD)
+ if(oberon_is_const(a) && oberon_is_const(b))
{
- expr = oberon_new_operator(OP_MOD, result, a, b);
+ if(oberon_is_set_type(result))
+ {
+ int64_t x = a -> item.integer;
+ int64_t y = b -> item.integer;
+ switch(token)
+ {
+ case PLUS: expr = oberon_make_set(ctx, x | y); break;
+ case MINUS: expr = oberon_make_set(ctx, x & ~y); break;
+ case STAR: expr = oberon_make_set(ctx, x & y); break;
+ default: assert(0); break;
+ }
+ }
+ if(oberon_is_real_type(result))
+ {
+ double x = a -> item.real;
+ double y = b -> item.real;
+ switch(token)
+ {
+ case PLUS: expr = oberon_make_real_typed(ctx, x + y, result); break;
+ case MINUS: expr = oberon_make_real_typed(ctx, x - y, result); break;
+ case STAR: expr = oberon_make_real_typed(ctx, x * y, result); break;
+ default: assert(0); break;
+ }
+ }
+ else if(oberon_is_integer_type(result))
+ {
+ int64_t x = a -> item.integer;
+ int64_t y = b -> item.integer;
+ switch(token)
+ {
+ case PLUS: expr = oberon_make_integer(ctx, x + y); break;
+ case MINUS: expr = oberon_make_integer(ctx, x - y); break;
+ case STAR: expr = oberon_make_integer(ctx, x * y); break;
+ case DIV: expr = oberon_make_integer(ctx, x / y); break;
+ case MOD: expr = oberon_make_integer(ctx, x % y); break;
+ default: assert(0); break;
+ }
+ }
+ else
+ {
+ assert(0);
+ }
}
else
{
- oberon_error(ctx, "oberon_make_bin_op: bin wat");
+ a = oberon_cast_expr(ctx, a, result);
+ b = oberon_cast_expr(ctx, b, result);
+
+
+ if(oberon_is_set_type(result))
+ {
+ switch(token)
+ {
+ case PLUS:
+ expr = oberon_new_operator(OP_UNION, result, a, b);
+ break;
+ case MINUS:
+ expr = oberon_new_operator(OP_DIFFERENCE, result, a, b);
+ break;
+ case STAR:
+ expr = oberon_new_operator(OP_INTERSECTION, result, a, b);
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ }
+ else if(oberon_is_real_type(result))
+ {
+ switch(token)
+ {
+ case PLUS:
+ expr = oberon_new_operator(OP_ADD, result, a, b);
+ break;
+ case MINUS:
+ expr = oberon_new_operator(OP_SUB, result, a, b);
+ break;
+ case STAR:
+ expr = oberon_new_operator(OP_MUL, result, a, b);
+ break;
+ default:
+ printf("token %i line %i\n", token, ctx -> loc.line);
+ assert(0);
+ break;
+ }
+ }
+ else if(oberon_is_integer_type(result))
+ {
+ switch(token)
+ {
+ case PLUS:
+ expr = oberon_new_operator(OP_ADD, result, a, b);
+ break;
+ case MINUS:
+ expr = oberon_new_operator(OP_SUB, result, a, b);
+ break;
+ case STAR:
+ expr = oberon_new_operator(OP_MUL, result, a, b);
+ break;
+ case DIV:
+ expr = oberon_new_operator(OP_DIV, result, a, b);
+ break;
+ case MOD:
+ expr = oberon_new_operator(OP_MOD, result, a, b);
+ break;
+ default:
+ printf("token %i line %i\n", token, ctx -> loc.line);
+ assert(0);
+ break;
+ }
+ }
+ else
+ {
+ assert(0);
+ }
}
}
}
expr = oberon_term_expr(ctx);
+
while(ISADDOP(ctx -> token))
{
int token = ctx -> token;
}
#define ISRELATION(x) \
- ((x) >= EQUAL && (x) <= GEQ)
+ ((x) >= EQUAL && (x) <= IS)
static oberon_expr_t *
oberon_expr(oberon_context_t * ctx)
return expr;
}
-static oberon_item_t *
-oberon_const_expr(oberon_context_t * ctx)
+static bool
+oberon_is_const(oberon_expr_t * expr)
{
- oberon_expr_t * expr;
- expr = oberon_expr(ctx);
+ if(expr -> is_item == false)
+ {
+ return false;
+ }
- if(expr -> is_item == 0)
+ switch(expr -> item.mode)
+ {
+ case MODE_INTEGER:
+ case MODE_BOOLEAN:
+ case MODE_NIL:
+ case MODE_REAL:
+ case MODE_CHAR:
+ case MODE_STRING:
+ case MODE_SET:
+ case MODE_TYPE:
+ case MODE_SYSBYTE:
+ return true;
+ break;
+ default:
+ return false;
+ break;
+ }
+
+ return false;
+}
+
+static void
+oberon_check_const(oberon_context_t * ctx, oberon_expr_t * expr)
+{
+ if(!oberon_is_const(expr))
{
oberon_error(ctx, "const expression are required");
}
+}
+static oberon_item_t *
+oberon_const_expr(oberon_context_t * ctx)
+{
+ oberon_expr_t * expr;
+ expr = oberon_expr(ctx);
+ oberon_check_const(ctx, expr);
return (oberon_item_t *) expr;
}
}
static oberon_object_t *
-oberon_ident_def(oberon_context_t * ctx, int class)
+oberon_ident_def(oberon_context_t * ctx, int class, bool check_upscope)
{
char * name;
int export;
name = oberon_assert_ident(ctx);
oberon_def(ctx, &export, &read_only);
- x = oberon_define_object(ctx -> decl, name, class, export, read_only);
+ x = oberon_define_object(ctx -> decl, name, class, export, read_only, check_upscope);
return x;
}
static void
-oberon_ident_list(oberon_context_t * ctx, int class, int * num, oberon_object_t ** list)
+oberon_ident_list(oberon_context_t * ctx, int class, bool check_upscope, int * num, oberon_object_t ** list)
{
*num = 1;
- *list = oberon_ident_def(ctx, class);
+ *list = oberon_ident_def(ctx, class, check_upscope);
while(ctx -> token == COMMA)
{
oberon_assert_token(ctx, COMMA);
- oberon_ident_def(ctx, class);
+ oberon_ident_def(ctx, class, check_upscope);
*num += 1;
}
}
int num;
oberon_object_t * list;
oberon_type_t * type;
- type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
- oberon_ident_list(ctx, OBERON_CLASS_VAR, &num, &list);
+ oberon_ident_list(ctx, OBERON_CLASS_VAR, false, &num, &list);
oberon_assert_token(ctx, COLON);
oberon_type(ctx, &type);
int num;
oberon_object_t * list;
- oberon_ident_list(ctx, class, &num, &list);
+ oberon_ident_list(ctx, class, false, &num, &list);
oberon_assert_token(ctx, COLON);
oberon_type_t * type;
- type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
oberon_type(ctx, &type);
oberon_object_t * param = list;
{
oberon_error(ctx, "function result is not type");
}
+ if(typeobj -> type -> class == OBERON_TYPE_RECORD
+ || typeobj -> type -> class == OBERON_TYPE_ARRAY)
+ {
+ oberon_error(ctx, "records or arrays could not be result of function");
+ }
signature -> base = typeobj -> type;
}
}
signature = *type;
signature -> class = OBERON_TYPE_PROCEDURE;
signature -> num_decl = 0;
- signature -> base = ctx -> void_type;
+ signature -> base = ctx -> notype_type;
signature -> decl = NULL;
if(ctx -> token == LPAREN)
oberon_object_t * proc = ctx -> decl -> parent;
oberon_type_t * result_type = proc -> type -> base;
- if(result_type -> class == OBERON_TYPE_VOID)
+ if(result_type -> class == OBERON_TYPE_NOTYPE)
{
if(expr != NULL)
{
oberon_error(ctx, "procedure requires expression on result");
}
- oberon_autocast_to(ctx, expr, result_type);
+ oberon_check_src(ctx, expr);
+ oberon_check_assignment_compatible(ctx, expr, result_type);
+ expr = oberon_cast_expr(ctx, expr, result_type);
}
proc -> has_return = 1;
oberon_error(ctx, "procedure name not matched");
}
- if(proc -> type -> base -> class == OBERON_TYPE_VOID
- && proc -> has_return == 0)
+ if(proc -> type -> base -> class == OBERON_TYPE_NOTYPE)
{
oberon_make_return(ctx, NULL);
}
char * name;
int export;
int read_only;
+
+ if(ctx -> token == STAR)
+ {
+ oberon_assert_token(ctx, STAR);
+ }
+
name = oberon_assert_ident(ctx);
oberon_def(ctx, &export, &read_only);
ctx -> decl -> local = 1;
oberon_type_t * signature;
- signature = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ signature = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
oberon_opt_formal_pars(ctx, &signature);
- oberon_initialize_decl(ctx);
+ //oberon_initialize_decl(ctx);
oberon_generator_init_type(ctx, signature);
oberon_close_scope(ctx -> decl);
oberon_object_t * proc;
- proc = oberon_find_object(ctx -> decl, name, 0);
- if(proc != NULL)
+ proc = oberon_find_object_in_scope(ctx -> decl, name, 0);
+ if(proc == NULL)
+ {
+ proc = oberon_define_object(ctx -> decl, name, OBERON_CLASS_PROC, export, read_only, false);
+ proc -> type = signature;
+ proc -> scope = proc_scope;
+ oberon_generator_init_proc(ctx, proc);
+ }
+ else
{
if(proc -> class != OBERON_CLASS_PROC)
{
oberon_compare_signatures(ctx, proc -> type, signature);
}
- else
+
+ proc_scope -> parent = proc;
+ oberon_object_t * param = proc_scope -> list -> next;
+ while(param)
{
- proc = oberon_define_object(ctx -> decl, name, OBERON_CLASS_PROC, export, read_only);
- proc -> type = signature;
- proc -> scope = proc_scope;
- oberon_generator_init_proc(ctx, proc);
+ param -> parent = proc;
+ param = param -> next;
}
- proc -> scope -> parent = proc;
-
if(forward == 0)
{
proc -> linked = 1;
oberon_item_t * value;
oberon_object_t * constant;
- constant = oberon_ident_def(ctx, OBERON_CLASS_CONST);
+ constant = oberon_ident_def(ctx, OBERON_CLASS_CONST, false);
oberon_assert_token(ctx, EQUAL);
value = oberon_const_expr(ctx);
constant -> value = value;
@@ -1961,31 +2565,6 @@ oberon_make_array_type(oberon_context_t * ctx, oberon_expr_t * size, oberon_type
arr -> base = base;
}
-static void
-oberon_field_list(oberon_context_t * ctx, oberon_type_t * rec)
-{
- if(ctx -> token == IDENT)
- {
- int num;
- oberon_object_t * list;
- oberon_type_t * type;
- type = oberon_new_type_ptr(OBERON_TYPE_VOID);
-
- oberon_ident_list(ctx, OBERON_CLASS_FIELD, &num, &list);
- oberon_assert_token(ctx, COLON);
- oberon_type(ctx, &type);
-
- oberon_object_t * field = list;
- for(int i = 0; i < num; i++)
- {
- field -> type = type;
- field = field -> next;
- }
-
- rec -> num_decl += num;
- }
-}
-
static void
oberon_qualident_type(oberon_context_t * ctx, oberon_type_t ** type)
{
}
else
{
- to = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE, 0, 0);
- to -> type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ to = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE, false, false, false);
+ to -> type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
}
*type = to -> type;
@@ -2029,7 +2608,7 @@ oberon_make_multiarray(oberon_context_t * ctx, oberon_expr_t * sizes, oberon_typ
}
oberon_type_t * dim;
- dim = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ dim = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
oberon_make_multiarray(ctx, sizes -> next, base, &dim);
@@ -2045,28 +2624,114 @@ oberon_make_open_array(oberon_context_t * ctx, oberon_type_t * base, oberon_type
}
static void
-oberon_type(oberon_context_t * ctx, oberon_type_t ** type)
+oberon_field_list(oberon_context_t * ctx, oberon_type_t * rec, oberon_scope_t * modscope)
{
if(ctx -> token == IDENT)
{
- oberon_qualident_type(ctx, type);
- }
- else if(ctx -> token == ARRAY)
- {
- oberon_assert_token(ctx, ARRAY);
+ int num;
+ oberon_object_t * list;
+ oberon_type_t * type;
+ type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
- int num_sizes = 0;
- oberon_expr_t * sizes;
+ oberon_ident_list(ctx, OBERON_CLASS_FIELD, true, &num, &list);
+ oberon_assert_token(ctx, COLON);
- if(ISEXPR(ctx -> token))
+ oberon_scope_t * current = ctx -> decl;
+ ctx -> decl = modscope;
+ oberon_type(ctx, &type);
+ ctx -> decl = current;
+
+ oberon_object_t * field = list;
+ for(int i = 0; i < num; i++)
{
- oberon_expr_list(ctx, &num_sizes, &sizes, 1);
+ field -> type = type;
+ field = field -> next;
}
- oberon_assert_token(ctx, OF);
-
+ rec -> num_decl += num;
+ }
+}
+
+static void
+oberon_type_record_body(oberon_context_t * ctx, oberon_type_t * rec)
+{
+ oberon_scope_t * oldscope = ctx -> decl;
+ ctx -> decl = oldscope;
+
+ if(ctx -> token == LPAREN)
+ {
+ oberon_assert_token(ctx, LPAREN);
+
+ oberon_object_t * typeobj;
+ typeobj = oberon_qualident(ctx, NULL, true);
+
+ if(typeobj -> class != OBERON_CLASS_TYPE)
+ {
+ oberon_error(ctx, "base must be type");
+ }
+
+ oberon_type_t * base = typeobj -> type;
+ if(base -> class == OBERON_TYPE_POINTER)
+ {
+ base = base -> base;
+ }
+
+ if(base -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "base must be record type");
+ }
+
+ rec -> base = base;
+ ctx -> decl = base -> scope;
+
+ oberon_assert_token(ctx, RPAREN);
+ }
+ else
+ {
+ ctx -> decl = NULL;
+ }
+
+ oberon_scope_t * this_scope;
+ this_scope = oberon_open_scope(ctx);
+ this_scope -> local = true;
+ this_scope -> parent = NULL;
+ this_scope -> parent_type = rec;
+
+ oberon_field_list(ctx, rec, oldscope);
+ while(ctx -> token == SEMICOLON)
+ {
+ oberon_assert_token(ctx, SEMICOLON);
+ oberon_field_list(ctx, rec, oldscope);
+ }
+
+ rec -> scope = this_scope;
+ rec -> decl = this_scope -> list -> next;
+ ctx -> decl = oldscope;
+}
+
+static void
+oberon_type(oberon_context_t * ctx, oberon_type_t ** type)
+{
+ if(ctx -> token == IDENT)
+ {
+ oberon_qualident_type(ctx, type);
+ }
+ else if(ctx -> token == ARRAY)
+ {
+ oberon_assert_token(ctx, ARRAY);
+
+ int num_sizes = 0;
+ oberon_expr_t * sizes;
+
+ if(ISEXPR(ctx -> token))
+ {
+ oberon_expr_list(ctx, &num_sizes, &sizes, 1);
+ }
+
+ oberon_assert_token(ctx, OF);
+
oberon_type_t * base;
- base = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ base = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
oberon_type(ctx, &base);
if(num_sizes == 0)
oberon_type_t * rec;
rec = *type;
rec -> class = OBERON_TYPE_RECORD;
-
- oberon_scope_t * record_scope;
- record_scope = oberon_open_scope(ctx);
- // TODO parent object
- //record_scope -> parent = NULL;
- record_scope -> local = 1;
+ rec -> module = ctx -> mod;
oberon_assert_token(ctx, RECORD);
- oberon_field_list(ctx, rec);
- while(ctx -> token == SEMICOLON)
- {
- oberon_assert_token(ctx, SEMICOLON);
- oberon_field_list(ctx, rec);
- }
+ oberon_type_record_body(ctx, rec);
oberon_assert_token(ctx, END);
- rec -> decl = record_scope -> list -> next;
- oberon_close_scope(record_scope);
-
*type = rec;
}
else if(ctx -> token == POINTER)
oberon_assert_token(ctx, TO);
oberon_type_t * base;
- base = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ base = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
oberon_type(ctx, &base);
oberon_type_t * ptr;
newtype = oberon_find_object(ctx -> decl, name, 0);
if(newtype == NULL)
{
- newtype = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE, export, read_only);
- newtype -> type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+ newtype = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE, export, read_only, false);
+ newtype -> type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
assert(newtype -> type);
}
else
type = newtype -> type;
oberon_type(ctx, &type);
- if(type -> class == OBERON_TYPE_VOID)
+ if(type -> class == OBERON_TYPE_NOTYPE)
{
oberon_error(ctx, "recursive alias declaration");
}
@@ -2194,10 +2846,18 @@ oberon_prevent_recursive_pointer(oberon_context_t * ctx, oberon_type_t * type)
if(type -> recursive)
{
- oberon_error(ctx, "recursive pointer declaration");
+ if(type -> class == OBERON_TYPE_POINTER)
+ {
+ oberon_error(ctx, "recursive pointer declaration");
+ }
+ else
+ {
+ oberon_error(ctx, "recursive array declaration (pointer)");
+ }
}
- if(type -> base -> class == OBERON_TYPE_POINTER)
+ if(type -> class == OBERON_TYPE_POINTER
+ && type -> base -> class == OBERON_TYPE_POINTER)
{
oberon_error(ctx, "attempt to make pointer to pointer");
}
@@ -2224,6 +2884,11 @@ oberon_prevent_recursive_record(oberon_context_t * ctx, oberon_type_t * type)
type -> recursive = 1;
+ if(type -> base)
+ {
+ oberon_prevent_recursive_record(ctx, type -> base);
+ }
+
int num_fields = type -> num_decl;
oberon_object_t * field = type -> decl;
for(int i = 0; i < num_fields; i++)
@@ -2341,20 +3006,12 @@ static void oberon_initialize_type(oberon_context_t * ctx, oberon_type_t * type)
static void
oberon_initialize_record_fields(oberon_context_t * ctx, oberon_type_t * type)
{
- if(type -> class != OBERON_TYPE_RECORD)
- {
- return;
- }
+ assert(type -> class == OBERON_TYPE_RECORD);
int num_fields = type -> num_decl;
oberon_object_t * field = type -> decl;
for(int i = 0; i < num_fields; i++)
{
- if(field -> type -> class == OBERON_TYPE_POINTER)
- {
- oberon_initialize_type(ctx, field -> type);
- }
-
oberon_initialize_object(ctx, field);
field = field -> next;
}
static void
oberon_initialize_type(oberon_context_t * ctx, oberon_type_t * type)
{
- if(type -> class == OBERON_TYPE_VOID)
+ if(type -> class == OBERON_TYPE_NOTYPE)
{
oberon_error(ctx, "undeclarated type");
}
type -> initialized = 1;
- if(type -> class == OBERON_TYPE_POINTER)
- {
- oberon_initialize_type(ctx, type -> base);
- oberon_generator_init_type(ctx, type);
- }
- else if(type -> class == OBERON_TYPE_ARRAY)
+ if(type -> class == OBERON_TYPE_POINTER || type -> class == OBERON_TYPE_ARRAY)
{
- if(type -> size != 0)
+ if(type -> class == OBERON_TYPE_ARRAY
+ && type -> size != 0
+ && type -> base -> class == OBERON_TYPE_ARRAY
+ && type -> base -> size == 0)
{
- if(type -> base -> class == OBERON_TYPE_ARRAY)
- {
- if(type -> base -> size == 0)
- {
- oberon_error(ctx, "open array not allowed as array element");
- }
- }
+ oberon_error(ctx, "open array not allowed as array element");
}
- oberon_initialize_type(ctx, type -> base);
- oberon_generator_init_type(ctx, type);
+ oberon_type_t * rec = type -> base;
+ while(rec -> class == OBERON_TYPE_ARRAY || rec -> class == OBERON_TYPE_POINTER)
+ {
+ rec = rec -> base;
+ }
+
+ if(rec -> class == OBERON_TYPE_RECORD
+ && rec -> initialized == 0)
+ {
+ rec -> initialized = 1;
+ oberon_generator_init_type(ctx, rec);
+ oberon_initialize_type(ctx, type -> base);
+ oberon_generator_init_type(ctx, type);
+ oberon_initialize_record_fields(ctx, rec);
+ }
+ else
+ {
+ oberon_initialize_type(ctx, type -> base);
+ oberon_generator_init_type(ctx, type);
+ }
}
else if(type -> class == OBERON_TYPE_RECORD)
{
+ printf("Init type: RECORD\n");
oberon_generator_init_type(ctx, type);
oberon_initialize_record_fields(ctx, type);
}
else if(type -> class == OBERON_TYPE_PROCEDURE)
{
+ printf("Init type: PROCEDURE\n");
int num_fields = type -> num_decl;
oberon_object_t * field = type -> decl;
for(int i = 0; i < num_fields; i++)
{
- oberon_initialize_object(ctx, field);
+ oberon_initialize_type(ctx, field -> type);
field = field -> next;
- }
+ }
oberon_generator_init_type(ctx, type);
}
static void
oberon_decl_seq(oberon_context_t * ctx)
{
- if(ctx -> token == CONST)
+ while(ctx -> token >= CONST && ctx -> token <= VAR)
{
- oberon_assert_token(ctx, CONST);
- while(ctx -> token == IDENT)
+ if(ctx -> token == CONST)
{
- oberon_const_decl(ctx);
- oberon_assert_token(ctx, SEMICOLON);
+ oberon_assert_token(ctx, CONST);
+ while(ctx -> token == IDENT)
+ {
+ oberon_const_decl(ctx);
+ oberon_assert_token(ctx, SEMICOLON);
+ }
}
- }
-
- if(ctx -> token == TYPE)
- {
- oberon_assert_token(ctx, TYPE);
- while(ctx -> token == IDENT)
+ else if(ctx -> token == TYPE)
{
- oberon_type_decl(ctx);
- oberon_assert_token(ctx, SEMICOLON);
+ oberon_assert_token(ctx, TYPE);
+ while(ctx -> token == IDENT)
+ {
+ oberon_type_decl(ctx);
+ oberon_assert_token(ctx, SEMICOLON);
+ }
}
- }
-
- if(ctx -> token == VAR)
- {
- oberon_assert_token(ctx, VAR);
- while(ctx -> token == IDENT)
+ else if(ctx -> token == VAR)
{
- oberon_var_decl(ctx);
- oberon_assert_token(ctx, SEMICOLON);
+ oberon_assert_token(ctx, VAR);
+ while(ctx -> token == IDENT)
+ {
+ oberon_var_decl(ctx);
+ oberon_assert_token(ctx, SEMICOLON);
+ }
}
}
oberon_prevent_undeclarated_procedures(ctx);
}
-static void
-oberon_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
+static oberon_expr_t *
+oberon_make_temp_var_item(oberon_context_t * ctx, oberon_type_t * type)
{
- if(dst -> read_only)
- {
- oberon_error(ctx, "read-only destination");
- }
+ oberon_object_t * x;
+ oberon_expr_t * expr;
- oberon_autocast_to(ctx, src, dst -> result);
- oberon_generate_assign(ctx, src, dst);
+ x = oberon_create_object(ctx -> decl, "TEMP", OBERON_CLASS_VAR, false, false);
+ x -> local = true;
+ x -> type = type;
+ oberon_generator_init_temp_var(ctx, x);
+
+ expr = oberon_new_item(MODE_VAR, type, false);
+ expr -> item.var = x;
+ return expr;
}
static void
-oberon_statement(oberon_context_t * ctx)
+oberon_statement_seq(oberon_context_t * ctx);
+
+static void
+oberon_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
{
- oberon_expr_t * item1;
- oberon_expr_t * item2;
+ oberon_check_dst(ctx, dst);
+ oberon_check_assignment_compatible(ctx, src, dst -> result);
- if(ctx -> token == IDENT)
+ if(oberon_is_array_of_char_type(dst -> result)
+ && oberon_is_string_type(src -> result))
{
- item1 = oberon_designator(ctx);
- if(ctx -> token == ASSIGN)
- {
- oberon_assert_token(ctx, ASSIGN);
- item2 = oberon_expr(ctx);
- oberon_assign(ctx, item2, item1);
- }
- else
- {
- oberon_opt_proc_parens(ctx, item1);
- }
+ src -> next = dst;
+ oberon_make_copy_call(ctx, 2, src);
}
- else if(ctx -> token == RETURN)
+ else
{
- oberon_assert_token(ctx, RETURN);
- if(ISEXPR(ctx -> token))
- {
- oberon_expr_t * expr;
- expr = oberon_expr(ctx);
- oberon_make_return(ctx, expr);
- }
- else
- {
- oberon_make_return(ctx, NULL);
- }
+ src = oberon_cast_expr(ctx, src, dst -> result);
+ oberon_generate_assign(ctx, src, dst);
}
}
-static void
-oberon_statement_seq(oberon_context_t * ctx)
+static oberon_expr_t *
+oberon_case_labels(oberon_context_t * ctx, oberon_expr_t * val)
{
- oberon_statement(ctx);
- while(ctx -> token == SEMICOLON)
- {
- oberon_assert_token(ctx, SEMICOLON);
- oberon_statement(ctx);
- }
-}
+ oberon_expr_t * e1;
+ oberon_expr_t * e2;
+ oberon_expr_t * cond;
+ oberon_expr_t * cond2;
-static void
-oberon_import_module(oberon_context_t * ctx, char * alias, char * name)
-{
- oberon_module_t * m = ctx -> module_list;
- while(m && strcmp(m -> name, name) != 0)
+ e1 = (oberon_expr_t *) oberon_const_expr(ctx);
+
+ e2 = NULL;
+ if(ctx -> token == DOTDOT)
{
- m = m -> next;
+ oberon_assert_token(ctx, DOTDOT);
+ e2 = (oberon_expr_t *) oberon_const_expr(ctx);
}
- if(m == NULL)
+ if(e2 == NULL)
{
- const char * code;
- code = ctx -> import_module(name);
- if(code == NULL)
- {
- oberon_error(ctx, "no such module");
- }
-
- m = oberon_compile_module(ctx, code);
- assert(m);
+ /* val == e1 */
+ cond = oberon_make_bin_op(ctx, EQUAL, val, e1);
}
-
- if(m -> ready == 0)
+ else
{
- oberon_error(ctx, "cyclic module import");
+ /* val >= e1 && val <= e2 */
+ cond = oberon_make_bin_op(ctx, GEQ, val, e1);
+ cond2 = oberon_make_bin_op(ctx, LEQ, val, e2);
+ cond = oberon_make_bin_op(ctx, AND, cond, cond2);
}
- oberon_object_t * ident;
- ident = oberon_define_object(ctx -> decl, alias, OBERON_CLASS_MODULE, 0, 0);
- ident -> module = m;
+ return cond;
}
static void
-oberon_import_decl(oberon_context_t * ctx)
+oberon_case(oberon_context_t * ctx, oberon_expr_t * val, gen_label_t * end)
{
- char * alias;
- char * name;
+ oberon_expr_t * cond;
+ oberon_expr_t * cond2;
+ gen_label_t * this_end;
- alias = name = oberon_assert_ident(ctx);
- if(ctx -> token == ASSIGN)
+ if(ISEXPR(ctx -> token))
{
- oberon_assert_token(ctx, ASSIGN);
- name = oberon_assert_ident(ctx);
- }
+ this_end = oberon_generator_reserve_label(ctx);
- oberon_import_module(ctx, alias, name);
-}
+ cond = oberon_case_labels(ctx, val);
+ while(ctx -> token == COMMA)
+ {
+ oberon_assert_token(ctx, COMMA);
+ /* cond || cond2 */
+ cond2 = oberon_case_labels(ctx, val);
+ cond = oberon_make_bin_op(ctx, OR, cond, cond2);
+ }
+ oberon_assert_token(ctx, COLON);
-static void
-oberon_import_list(oberon_context_t * ctx)
-{
- oberon_assert_token(ctx, IMPORT);
+ oberon_generate_branch(ctx, cond, false, this_end);
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, end);
- oberon_import_decl(ctx);
- while(ctx -> token == COMMA)
- {
- oberon_assert_token(ctx, COMMA);
- oberon_import_decl(ctx);
+ oberon_generate_label(ctx, this_end);
}
-
- oberon_assert_token(ctx, SEMICOLON);
}
static void
-oberon_parse_module(oberon_context_t * ctx)
+oberon_case_statement(oberon_context_t * ctx)
{
- char * name1;
- char * name2;
- oberon_read_token(ctx);
+ oberon_expr_t * val;
+ oberon_expr_t * expr;
+ gen_label_t * end;
- oberon_assert_token(ctx, MODULE);
- name1 = oberon_assert_ident(ctx);
- oberon_assert_token(ctx, SEMICOLON);
- ctx -> mod -> name = name1;
+ end = oberon_generator_reserve_label(ctx);
- if(ctx -> token == IMPORT)
+ oberon_assert_token(ctx, CASE);
+ expr = oberon_expr(ctx);
+ val = oberon_make_temp_var_item(ctx, expr -> result);
+ oberon_assign(ctx, expr, val);
+ oberon_assert_token(ctx, OF);
+ oberon_case(ctx, val, end);
+ while(ctx -> token == BAR)
{
- oberon_import_list(ctx);
+ oberon_assert_token(ctx, BAR);
+ oberon_case(ctx, val, end);
}
- oberon_decl_seq(ctx);
-
- oberon_generate_begin_module(ctx);
- if(ctx -> token == BEGIN)
+ if(ctx -> token == ELSE)
{
- oberon_assert_token(ctx, BEGIN);
+ oberon_assert_token(ctx, ELSE);
oberon_statement_seq(ctx);
}
- oberon_generate_end_module(ctx);
-
- oberon_assert_token(ctx, END);
- name2 = oberon_assert_ident(ctx);
- oberon_assert_token(ctx, DOT);
-
- if(strcmp(name1, name2) != 0)
+ else
{
- oberon_error(ctx, "module name not matched");
+ oberon_generate_trap(ctx, -1);
}
-}
-// =======================================================================
-// LIBRARY
-// =======================================================================
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+}
static void
-register_default_types(oberon_context_t * ctx)
+oberon_with_guard_do(oberon_context_t * ctx, gen_label_t * end)
{
- ctx -> void_type = oberon_new_type_ptr(OBERON_TYPE_VOID);
- oberon_generator_init_type(ctx, ctx -> void_type);
+ oberon_object_t * var;
+ oberon_expr_t * var_expr;
+ oberon_expr_t * type_expr;
+ oberon_expr_t * cond;
+ oberon_type_t * type;
+ oberon_type_t * old_type;
+ gen_label_t * this_end;
+
+ this_end = oberon_generator_reserve_label(ctx);
+
+ var_expr = oberon_qualident_expr(ctx);
+ oberon_assert_token(ctx, COLON);
+ type_expr = oberon_qualident_expr(ctx);
+ cond = oberon_make_bin_op(ctx, IS, var_expr, type_expr);
+
+ var = var_expr -> item.var;
+ type = type_expr -> result;
+ old_type = var -> type;
- ctx -> void_ptr_type = oberon_new_type_ptr(OBERON_TYPE_POINTER);
- ctx -> void_ptr_type -> base = ctx -> void_type;
- oberon_generator_init_type(ctx, ctx -> void_ptr_type);
+ oberon_assert_token(ctx, DO);
+ oberon_generate_branch(ctx, cond, false, this_end);
- ctx -> int_type = oberon_new_type_integer(sizeof(int));
- oberon_define_type(ctx -> world_scope, "INTEGER", ctx -> int_type, 1);
+ var -> type = type;
+ oberon_set_typecheck(var, true);
- ctx -> bool_type = oberon_new_type_boolean(sizeof(bool));
- oberon_define_type(ctx -> world_scope, "BOOLEAN", ctx -> bool_type, 1);
+ oberon_statement_seq(ctx);
- ctx -> real_type = oberon_new_type_real(sizeof(float));
- oberon_define_type(ctx -> world_scope, "REAL", ctx -> real_type, 1);
+ var -> type = old_type;
+ oberon_set_typecheck(var, false);
+
+ oberon_generate_goto(ctx, end);
+ oberon_generate_label(ctx, this_end);
}
static void
-oberon_new_intrinsic(oberon_context_t * ctx, char * name, GenerateFuncCallback f, GenerateProcCallback p)
+oberon_with_statement(oberon_context_t * ctx)
{
- oberon_object_t * proc;
- proc = oberon_define_object(ctx -> decl, name, OBERON_CLASS_PROC, 1, 0);
- proc -> sysproc = 1;
- proc -> genfunc = f;
- proc -> genproc = p;
- proc -> type = oberon_new_type_ptr(OBERON_TYPE_PROCEDURE);
-}
+ gen_label_t * end;
+ end = oberon_generator_reserve_label(ctx);
-static oberon_expr_t *
+ oberon_assert_token(ctx, WITH);
+ oberon_with_guard_do(ctx, end);
+ while(ctx -> token == BAR)
+ {
+ oberon_assert_token(ctx, BAR);
+ oberon_with_guard_do(ctx, end);
+ }
+
+ if(ctx -> token == ELSE)
+ {
+ oberon_assert_token(ctx, ELSE);
+ oberon_statement_seq(ctx);
+ }
+ else
+ {
+ oberon_generate_trap(ctx, -2);
+ }
+
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+}
+
+static void
+oberon_statement(oberon_context_t * ctx)
+{
+ oberon_expr_t * item1;
+ oberon_expr_t * item2;
+
+ if(ctx -> token == IDENT)
+ {
+ item1 = oberon_designator(ctx);
+ if(ctx -> token == ASSIGN)
+ {
+ oberon_assert_token(ctx, ASSIGN);
+ item2 = oberon_expr(ctx);
+ oberon_assign(ctx, item2, item1);
+ }
+ else
+ {
+ oberon_opt_proc_parens(ctx, item1);
+ }
+ }
+ else if(ctx -> token == IF)
+ {
+ gen_label_t * end;
+ gen_label_t * els;
+ oberon_expr_t * cond;
+
+ els = oberon_generator_reserve_label(ctx);
+ end = oberon_generator_reserve_label(ctx);
+
+ oberon_assert_token(ctx, IF);
+ cond = oberon_expr(ctx);
+ if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+ {
+ oberon_error(ctx, "condition must be boolean");
+ }
+ oberon_assert_token(ctx, THEN);
+ oberon_generate_branch(ctx, cond, false, els);
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, end);
+ oberon_generate_label(ctx, els);
+
+ while(ctx -> token == ELSIF)
+ {
+ els = oberon_generator_reserve_label(ctx);
+
+ oberon_assert_token(ctx, ELSIF);
+ cond = oberon_expr(ctx);
+ if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+ {
+ oberon_error(ctx, "condition must be boolean");
+ }
+ oberon_assert_token(ctx, THEN);
+ oberon_generate_branch(ctx, cond, false, els);
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, end);
+ oberon_generate_label(ctx, els);
+ }
+
+ if(ctx -> token == ELSE)
+ {
+ oberon_assert_token(ctx, ELSE);
+ oberon_statement_seq(ctx);
+ }
+
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+ }
+ else if(ctx -> token == WHILE)
+ {
+ gen_label_t * begin;
+ gen_label_t * end;
+ oberon_expr_t * cond;
+
+ begin = oberon_generator_reserve_label(ctx);
+ end = oberon_generator_reserve_label(ctx);
+
+ oberon_assert_token(ctx, WHILE);
+ oberon_generate_label(ctx, begin);
+ cond = oberon_expr(ctx);
+ if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+ {
+ oberon_error(ctx, "condition must be boolean");
+ }
+ oberon_generate_branch(ctx, cond, false, end);
+
+ oberon_assert_token(ctx, DO);
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, begin);
+
+ oberon_assert_token(ctx, END);
+ oberon_generate_label(ctx, end);
+ }
+ else if(ctx -> token == REPEAT)
+ {
+ gen_label_t * begin;
+ oberon_expr_t * cond;
+
+ begin = oberon_generator_reserve_label(ctx);
+ oberon_generate_label(ctx, begin);
+ oberon_assert_token(ctx, REPEAT);
+
+ oberon_statement_seq(ctx);
+
+ oberon_assert_token(ctx, UNTIL);
+
+ cond = oberon_expr(ctx);
+ if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+ {
+ oberon_error(ctx, "condition must be boolean");
+ }
+
+ oberon_generate_branch(ctx, cond, false, begin);
+ }
+ else if(ctx -> token == FOR)
+ {
+ oberon_expr_t * from;
+ oberon_expr_t * index;
+ oberon_expr_t * to;
+ oberon_expr_t * bound;
+ oberon_expr_t * by;
+ oberon_expr_t * cond;
+ oberon_expr_t * count;
+ gen_label_t * begin;
+ gen_label_t * end;
+ char * iname;
+ int op;
+
+ begin = oberon_generator_reserve_label(ctx);
+ end = oberon_generator_reserve_label(ctx);
+
+ oberon_assert_token(ctx, FOR);
+ iname = oberon_assert_ident(ctx);
+ index = oberon_ident_item(ctx, iname);
+ oberon_assert_token(ctx, ASSIGN);
+ from = oberon_expr(ctx);
+ oberon_assert_token(ctx, TO);
+ bound = oberon_make_temp_var_item(ctx, index -> result);
+ to = oberon_expr(ctx);
+ oberon_assign(ctx, to, bound); // сначала temp
+ oberon_assign(ctx, from, index); // потом i
+ if(ctx -> token == BY)
+ {
+ oberon_assert_token(ctx, BY);
+ by = (oberon_expr_t *) oberon_const_expr(ctx);
+ }
+ else
+ {
+ by = oberon_make_integer(ctx, 1);
+ }
+
+ if(by -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "must be integer");
+ }
+
+ if(by -> item.integer > 0)
+ {
+ op = LEQ;
+ }
+ else if(by -> item.integer < 0)
+ {
+ op = GEQ;
+ }
+ else
+ {
+ oberon_error(ctx, "zero step not allowed");
+ }
+
+ oberon_assert_token(ctx, DO);
+ oberon_generate_label(ctx, begin);
+ cond = oberon_make_bin_op(ctx, op, index, bound);
+ oberon_generate_branch(ctx, cond, false, end);
+ oberon_statement_seq(ctx);
+ count = oberon_make_bin_op(ctx, PLUS, index, by);
+ oberon_assign(ctx, count, index);
+ oberon_generate_goto(ctx, begin);
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+ }
+ else if(ctx -> token == LOOP)
+ {
+ gen_label_t * begin;
+ gen_label_t * end;
+
+ begin = oberon_generator_reserve_label(ctx);
+ end = oberon_generator_reserve_label(ctx);
+
+ oberon_open_scope(ctx);
+ oberon_assert_token(ctx, LOOP);
+ oberon_generate_label(ctx, begin);
+ ctx -> decl -> exit_label = end;
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, begin);
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+ oberon_close_scope(ctx -> decl);
+ }
+ else if(ctx -> token == EXIT)
+ {
+ oberon_assert_token(ctx, EXIT);
+ if(ctx -> decl -> exit_label == NULL)
+ {
+ oberon_error(ctx, "not in LOOP-END");
+ }
+ oberon_generate_goto(ctx, ctx -> decl -> exit_label);
+ }
+ else if(ctx -> token == CASE)
+ {
+ oberon_case_statement(ctx);
+ }
+ else if(ctx -> token == WITH)
+ {
+ oberon_with_statement(ctx);
+ }
+ else if(ctx -> token == RETURN)
+ {
+ oberon_assert_token(ctx, RETURN);
+ if(ISEXPR(ctx -> token))
+ {
+ oberon_expr_t * expr;
+ expr = oberon_expr(ctx);
+ oberon_make_return(ctx, expr);
+ }
+ else
+ {
+ oberon_make_return(ctx, NULL);
+ }
+ }
+}
+
+static void
+oberon_statement_seq(oberon_context_t * ctx)
+{
+ oberon_statement(ctx);
+ while(ctx -> token == SEMICOLON)
+ {
+ oberon_assert_token(ctx, SEMICOLON);
+ oberon_statement(ctx);
+ }
+}
+
+static void
+oberon_import_module(oberon_context_t * ctx, char * alias, char * name)
+{
+ oberon_module_t * m = ctx -> module_list;
+ while(m && strcmp(m -> name, name) != 0)
+ {
+ m = m -> next;
+ }
+
+ if(m == NULL)
+ {
+ oberon_scanner_t * s;
+ s = ctx -> import_module(name);
+ if(s == NULL)
+ {
+ oberon_error(ctx, "no such module %s", name);
+ }
+
+ m = oberon_compile_module(ctx, s);
+ assert(m);
+ }
+
+ if(m -> ready == 0)
+ {
+ oberon_error(ctx, "cyclic module import");
+ }
+
+ oberon_object_t * ident;
+ ident = oberon_define_object(ctx -> decl, alias, OBERON_CLASS_MODULE, false, false, false);
+ ident -> module = m;
+}
+
+static void
+oberon_import_decl(oberon_context_t * ctx)
+{
+ char * alias;
+ char * name;
+
+ alias = name = oberon_assert_ident(ctx);
+ if(ctx -> token == ASSIGN)
+ {
+ oberon_assert_token(ctx, ASSIGN);
+ name = oberon_assert_ident(ctx);
+ }
+
+ oberon_import_module(ctx, alias, name);
+}
+
+static void
+oberon_import_list(oberon_context_t * ctx)
+{
+ oberon_assert_token(ctx, IMPORT);
+
+ oberon_import_decl(ctx);
+ while(ctx -> token == COMMA)
+ {
+ oberon_assert_token(ctx, COMMA);
+ oberon_import_decl(ctx);
+ }
+
+ oberon_assert_token(ctx, SEMICOLON);
+}
+
+static void
+oberon_parse_module(oberon_context_t * ctx)
+{
+ char * name1;
+ char * name2;
+ oberon_read_token(ctx);
+
+ oberon_assert_token(ctx, MODULE);
+ name1 = oberon_assert_ident(ctx);
+ oberon_assert_token(ctx, SEMICOLON);
+ ctx -> mod -> name = name1;
+
+ oberon_generator_init_module(ctx, ctx -> mod);
+
+ if(ctx -> token == IMPORT)
+ {
+ oberon_import_list(ctx);
+ }
+
+ oberon_decl_seq(ctx);
+
+ oberon_generate_begin_module(ctx);
+ if(ctx -> token == BEGIN)
+ {
+ oberon_assert_token(ctx, BEGIN);
+ oberon_statement_seq(ctx);
+ }
+ oberon_generate_end_module(ctx);
+
+ oberon_assert_token(ctx, END);
+ name2 = oberon_assert_ident(ctx);
+ oberon_expect_token(ctx, DOT);
+
+ if(strcmp(name1, name2) != 0)
+ {
+ oberon_error(ctx, "module name not matched");
+ }
+
+ oberon_generator_fini_module(ctx -> mod);
+}
+
+// =======================================================================
+// LIBRARY
+// =======================================================================
+
+static oberon_expr_t *
+oberon_make_min_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+
+ if(!oberon_is_type_expr(arg))
+ {
+ oberon_error(ctx, "MIN accept only type");
+ }
+
+ oberon_expr_t * expr;
+ int bits = arg -> result -> size * 8;
+ switch(arg -> result -> class)
+ {
+ case OBERON_TYPE_INTEGER:
+ expr = oberon_make_integer(ctx, -powl(2, bits - 1));
+ break;
+ case OBERON_TYPE_BOOLEAN:
+ expr = oberon_make_boolean(ctx, false);
+ break;
+ case OBERON_TYPE_CHAR:
+ expr = oberon_make_char(ctx, 0);
+ break;
+ case OBERON_TYPE_REAL:
+ expr = oberon_make_real_typed(ctx, (bits <= 32) ? (-FLT_MAX) : (-DBL_MAX), arg -> result);
+ break;
+ case OBERON_TYPE_SET:
+ expr = oberon_make_integer(ctx, 0);
+ break;
+ default:
+ oberon_error(ctx, "allowed only basic types");
+ break;
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_max_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+
+ if(!oberon_is_type_expr(arg))
+ {
+ oberon_error(ctx, "MAX accept only type");
+ }
+
+ oberon_expr_t * expr;
+ int bits = arg -> result -> size * 8;
+ switch(arg -> result -> class)
+ {
+ case OBERON_TYPE_INTEGER:
+ expr = oberon_make_integer(ctx, powl(2, bits - 1) - 1);
+ break;
+ case OBERON_TYPE_BOOLEAN:
+ expr = oberon_make_boolean(ctx, true);
+ break;
+ case OBERON_TYPE_CHAR:
+ expr = oberon_make_char(ctx, powl(2, bits) - 1);
+ break;
+ case OBERON_TYPE_REAL:
+ expr = oberon_make_real_typed(ctx, (bits <= 32) ? (FLT_MAX) : (DBL_MAX), arg -> result);
+ break;
+ case OBERON_TYPE_SET:
+ expr = oberon_make_integer(ctx, bits);
+ break;
+ default:
+ oberon_error(ctx, "allowed only basic types");
+ break;
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_size_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ if(!oberon_is_type_expr(arg))
+ {
+ oberon_error(ctx, "SIZE accept only type");
+ }
+
+ int size;
+ oberon_expr_t * expr;
+ oberon_type_t * type = arg -> result;
+ switch(type -> class)
+ {
+ case OBERON_TYPE_INTEGER:
+ case OBERON_TYPE_BOOLEAN:
+ case OBERON_TYPE_REAL:
+ case OBERON_TYPE_CHAR:
+ case OBERON_TYPE_SET:
+ size = type -> size;
+ break;
+ default:
+ oberon_error(ctx, "TODO SIZE");
+ break;
+ }
+
+ expr = oberon_make_integer(ctx, size);
+ return expr;
+}
+
+static oberon_expr_t *
oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
{
if(num_args < 1)
@@ -2747,106 +3909,1021 @@ oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_expr_t * arg;
arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(!oberon_is_number_type(arg -> result))
+ {
+ oberon_error(ctx, "ABS accepts only numbers");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg))
+ {
+ if(oberon_is_real_type(arg -> result))
+ {
+ double x = arg -> item.real;
+ expr = oberon_make_real(ctx, fabsl(x), arg -> result);
+ }
+ else
+ {
+ int64_t x = arg -> item.integer;
+ expr = oberon_make_integer(ctx, llabs(x));
+ }
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_ABS, arg -> result, arg, NULL);
+ }
+ return expr;
+}
+
+static void
+oberon_make_inc_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * dst;
+ dst = list_args;
+ oberon_check_dst(ctx, dst);
+
+ if(!oberon_is_integer_type(dst -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * step;
+ if(num_args == 2)
+ {
+ step = list_args -> next;
+ oberon_check_src(ctx, step);
+ if(!oberon_is_integer_type(step -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+ }
+ else
+ {
+ step = oberon_make_integer(ctx, 1);
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_make_bin_op(ctx, PLUS, dst, step);
+ oberon_assign(ctx, expr, dst);
+}
+
+static void
+oberon_make_incl_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * dst;
+ dst = list_args;
+ oberon_check_dst(ctx, dst);
+
+ if(!oberon_is_set_type(dst -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * x;
+ x = list_args -> next;
+ oberon_check_src(ctx, x);
+
+ if(!oberon_is_integer_type(x -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_make_bin_op(ctx, PLUS, dst, oberon_new_operator(OP_RANGE, dst -> result, x, NULL));
+ oberon_assign(ctx, expr, dst);
+}
+
+static void
+oberon_make_excl_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * dst;
+ dst = list_args;
+ oberon_check_dst(ctx, dst);
+
+ if(!oberon_is_set_type(dst -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * x;
+ x = list_args -> next;
+ oberon_check_src(ctx, x);
+
+ if(!oberon_is_integer_type(x -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_make_bin_op(ctx, MINUS, dst, oberon_new_operator(OP_RANGE, dst -> result, x, NULL));
+ oberon_assign(ctx, expr, dst);
+}
+
+static void
+oberon_make_dec_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * dst;
+ dst = list_args;
+ oberon_check_dst(ctx, dst);
+
+ if(!oberon_is_integer_type(dst -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+
+ oberon_expr_t * step;
+ if(num_args == 2)
+ {
+ step = list_args -> next;
+ oberon_check_src(ctx, step);
+ if(!oberon_is_integer_type(step -> result))
+ {
+ oberon_error(ctx, "expect integer");
+ }
+ }
+ else
+ {
+ step = oberon_make_integer(ctx, 1);
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_make_bin_op(ctx, MINUS, dst, step);
+ oberon_assign(ctx, expr, dst);
+}
+
+static void
+oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ oberon_expr_t * dst;
+ dst = list_args;
+ oberon_check_dst(ctx, dst);
+
+ oberon_type_t * type;
+ type = dst -> result;
+
+ if(type -> class != OBERON_TYPE_POINTER)
+ {
+ oberon_error(ctx, "not a pointer");
+ }
+
+ type = type -> base;
+
+ oberon_expr_t * src;
+ src = oberon_new_item(MODE_NEW, dst -> result, 0);
+ src -> item.num_args = 0;
+ src -> item.args = NULL;
+
+ int max_args = 1;
+ if(type -> class == OBERON_TYPE_ARRAY)
+ {
+ if(type -> size == 0)
+ {
+ oberon_type_t * x = type;
+ while(x -> class == OBERON_TYPE_ARRAY)
+ {
+ if(x -> size == 0)
+ {
+ max_args += 1;
+ }
+ x = x -> base;
+ }
+ }
+
+ if(num_args < max_args)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > max_args)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ int num_sizes = max_args - 1;
+ oberon_expr_t * size_list = list_args -> next;
+
+ oberon_expr_t * arg = size_list;
+ for(int i = 0; i < max_args - 1; i++)
+ {
+ oberon_check_src(ctx, arg);
+ if(arg -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "size must be integer");
+ }
+ arg = arg -> next;
+ }
+
+ src -> item.num_args = num_sizes;
+ src -> item.args = size_list;
+ }
+ else if(type -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "oberon_make_new_call: wat");
+ }
+
+ if(num_args > max_args)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_assign(ctx, src, dst);
+}
+
+static void
+oberon_make_copy_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * src;
+ src = list_args;
+ oberon_check_src(ctx, src);
+
+ oberon_expr_t * dst;
+ dst = list_args -> next;
+ oberon_check_dst(ctx, dst);
+
+ if(!oberon_is_string_type(src -> result) && !oberon_is_array_of_char_type(src -> result))
+ {
+ oberon_error(ctx, "source must be string or array of char");
+ }
+
+ if(!oberon_is_array_of_char_type(dst -> result))
+ {
+ oberon_error(ctx, "dst must be array of char");
+ }
+
+ oberon_generate_copy(ctx, src, dst);
+}
+
+static void
+oberon_make_assert_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * cond;
+ cond = list_args;
+ oberon_check_src(ctx, cond);
+
+ if(!oberon_is_boolean_type(cond -> result))
+ {
+ oberon_error(ctx, "expected boolean");
+ }
+
+ if(num_args == 1)
+ {
+ oberon_generate_assert(ctx, cond);
+ }
+ else
+ {
+ oberon_expr_t * num;
+ num = list_args -> next;
+ oberon_check_src(ctx, num);
+
+ if(!oberon_is_integer_type(num -> result))
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_check_const(ctx, num);
+
+ oberon_generate_assert_n(ctx, cond, num -> item.integer);
+ }
+}
+
+static void
+oberon_make_halt_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * num;
+ num = list_args;
+ oberon_check_src(ctx, num);
+
+ if(num -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_check_const(ctx, num);
+
+ oberon_generate_halt(ctx, num -> item.integer);
+}
+
+static oberon_expr_t *
+oberon_make_ash_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg1;
+ arg1 = list_args;
+ oberon_check_src(ctx, arg1);
+ if(arg1 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_expr_t * arg2;
+ arg2 = list_args -> next;
+ oberon_check_src(ctx, arg2);
+ if(arg2 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg1) && oberon_is_const(arg2))
+ {
+ int64_t x = arg1 -> item.integer;
+ int64_t y = arg2 -> item.integer;
+ int64_t v = (y > 0) ? (x << y) : (x >> labs(y));
+ expr = oberon_make_integer(ctx, v);
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_ASH, arg1 -> result, arg1, arg2);
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_lsh_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg1;
+ arg1 = list_args;
+ oberon_check_src(ctx, arg1);
+
+ oberon_type_t * t = arg1 -> result;
+ if(!oberon_is_integer_type(t)
+ && !oberon_is_char_type(t)
+ && !oberon_is_system_byte_type(t))
+ {
+ oberon_error(ctx, "expected integer, char, or SYSTEM.BYTE");
+ }
+
+ oberon_expr_t * arg2;
+ arg2 = list_args -> next;
+ oberon_check_src(ctx, arg2);
+ if(arg2 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg1) && oberon_is_const(arg2))
+ {
+ uint64_t x = arg1 -> item.integer;
+ int64_t y = arg2 -> item.integer;
+ uint64_t v = (y > 0) ? (x << y) : (x >> labs(y));
+
+ if(oberon_is_integer_type(t))
+ {
+ expr = oberon_make_integer(ctx, v);
+ }
+ else if(oberon_is_char_type(t))
+ {
+ expr = oberon_make_char(ctx, v);
+ }
+ else
+ {
+ expr = oberon_make_system_byte(ctx, v);
+ }
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_LSH, arg1 -> result, arg1, arg2);
+ expr = oberon_cast_expr(ctx, expr, t);
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_rot_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg1;
+ arg1 = list_args;
+ oberon_check_src(ctx, arg1);
+
+ oberon_type_t * t = arg1 -> result;
+ if(!oberon_is_integer_type(t)
+ && !oberon_is_char_type(t)
+ && !oberon_is_system_byte_type(t))
+ {
+ oberon_error(ctx, "expected integer, char, or SYSTEM.BYTE");
+ }
+
+ oberon_expr_t * arg2;
+ arg2 = list_args -> next;
+ oberon_check_src(ctx, arg2);
+ if(arg2 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg1) && oberon_is_const(arg2))
+ {
+ uint64_t x = arg1 -> item.integer;
+ int64_t y = arg2 -> item.integer;
+
+ uint64_t v = 0;
+ if(y > 0)
+ {
+ v = (x << y) | (x >> (64 - y));
+ }
+ else
+ {
+ y = labs(y);
+ v = (x >> y) | (x << (64 - y));
+ }
+
+ if(oberon_is_integer_type(t))
+ {
+ expr = oberon_make_integer(ctx, v);
+ }
+ else if(oberon_is_char_type(t))
+ {
+ expr = oberon_make_char(ctx, v);
+ }
+ else
+ {
+ expr = oberon_make_system_byte(ctx, v);
+ }
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_ROT, arg1 -> result, arg1, arg2);
+ expr = oberon_cast_expr(ctx, expr, t);
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_cap_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(!oberon_is_char_type(arg -> result))
+ {
+ oberon_error(ctx, "expected char");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg))
+ {
+ expr = oberon_make_char(ctx, toupper(arg -> item.integer));
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_CAP, arg -> result, arg, NULL);
+ }
+
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_chr_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(!oberon_is_integer_type(arg -> result))
+ {
+ oberon_error(ctx, "expected integer");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg))
+ {
+ expr = oberon_make_char(ctx, arg -> item.integer);
+ }
+ else
+ {
+ expr = oberon_cast_expr(ctx, arg, ctx -> char_type);
+ }
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_ord_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
- oberon_type_t * result_type;
- result_type = arg -> result;
-
- if(result_type -> class != OBERON_TYPE_INTEGER)
+ if(!oberon_is_char_type(arg -> result) && !oberon_is_string_of_one(arg))
+ {
+ oberon_error(ctx, "expected char");
+ }
+
+ oberon_expr_t * expr;
+ if(oberon_is_const(arg))
+ {
+ expr = oberon_make_integer(ctx, arg -> item.integer);
+ }
+ else
+ {
+ expr = oberon_cast_expr(ctx, arg, ctx -> shortint_type);
+ }
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_entier_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
{
- oberon_error(ctx, "ABS accepts only integers");
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
}
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(!oberon_is_real_type(arg -> result))
+ {
+ oberon_error(ctx, "expected real");
+ }
oberon_expr_t * expr;
- expr = oberon_new_operator(OP_ABS, result_type, arg, NULL);
+ if(oberon_is_const(arg))
+ {
+ expr = oberon_make_integer(ctx, floor(arg -> item.real));
+ }
+ else
+ {
+ expr = oberon_new_operator(OP_ENTIER, ctx -> int_type, arg, NULL);
+ }
return expr;
}
-static void
-oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+static oberon_expr_t *
+oberon_make_odd_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
{
if(num_args < 1)
{
oberon_error(ctx, "too few arguments");
}
- oberon_expr_t * dst;
- dst = list_args;
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
- oberon_type_t * type;
- type = dst -> result;
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
- if(type -> class != OBERON_TYPE_POINTER)
+ if(!oberon_is_integer_type(arg -> result))
{
- oberon_error(ctx, "not a pointer");
+ oberon_error(ctx, "expected integer");
}
- type = type -> base;
+ oberon_expr_t * expr;
+ expr = oberon_make_bin_op(ctx, MOD, arg, oberon_make_integer(ctx, 2));
+ expr = oberon_make_bin_op(ctx, EQUAL, expr, oberon_make_integer(ctx, 1));
+ return expr;
+}
- oberon_expr_t * src;
- src = oberon_new_item(MODE_NEW, dst -> result, 0);
- src -> item.num_args = 0;
- src -> item.args = NULL;
+static oberon_expr_t *
+oberon_make_cc_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
- int max_args = 1;
- if(type -> class == OBERON_TYPE_ARRAY)
+ if(num_args > 1)
{
- if(type -> size == 0)
- {
- oberon_type_t * x = type;
- while(x -> class == OBERON_TYPE_ARRAY)
- {
- if(x -> size == 0)
- {
- max_args += 1;
- }
- x = x -> base;
- }
- }
+ oberon_error(ctx, "too mach arguments");
+ }
- if(num_args < max_args)
- {
- oberon_error(ctx, "too few arguments");
- }
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+ oberon_check_const(ctx, arg);
- if(num_args > max_args)
- {
- oberon_error(ctx, "too mach arguments");
- }
+ if(!oberon_is_integer_type(arg -> result))
+ {
+ oberon_error(ctx, "expected integer");
+ }
- int num_sizes = max_args - 1;
- oberon_expr_t * size_list = list_args -> next;
+ /* n >= 0 && n <= 15 */
- oberon_expr_t * arg = size_list;
- for(int i = 0; i < max_args - 1; i++)
+ oberon_expr_t * cond1;
+ oberon_expr_t * cond2;
+ cond1 = oberon_make_bin_op(ctx, GEQ, arg, oberon_make_integer(ctx, 0));
+ cond2 = oberon_make_bin_op(ctx, LEQ, arg, oberon_make_integer(ctx, 15));
+ return oberon_make_bin_op(ctx, AND, cond1, cond2);
+}
+
+static oberon_expr_t *
+oberon_make_short_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(arg -> result -> shorter == NULL)
+ {
+ oberon_error(ctx, "already shorter");
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_cast_expr(ctx, arg, arg -> result -> shorter);
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_long_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 1)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args;
+ oberon_check_src(ctx, arg);
+
+ if(arg -> result -> longer == NULL)
+ {
+ oberon_error(ctx, "already longer");
+ }
+
+ oberon_expr_t * expr;
+ expr = oberon_cast_expr(ctx, arg, arg -> result -> longer);
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_val_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 2)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * typ;
+ typ = list_args;
+ if(!oberon_is_type_expr(typ))
+ {
+ oberon_error(ctx, "requires type");
+ }
+
+ oberon_expr_t * arg;
+ arg = list_args -> next;
+ oberon_check_src(ctx, arg);
+
+ oberon_expr_t * expr;
+ expr = oberon_hard_cast_expr(ctx, arg, typ -> result);
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_make_len_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+ if(num_args < 1)
+ {
+ oberon_error(ctx, "too few arguments");
+ }
+
+ if(num_args > 2)
+ {
+ oberon_error(ctx, "too mach arguments");
+ }
+
+ oberon_expr_t * v;
+ v = list_args;
+ oberon_check_src(ctx, v);
+
+ if(!oberon_is_array_type(v -> result))
+ {
+ oberon_error(ctx, "expected array");
+ }
+
+ int n = 0;
+ if(num_args == 2)
+ {
+ oberon_expr_t * num;
+ num = list_args -> next;
+ oberon_check_src(ctx, num);
+
+ if(!oberon_is_integer_type(num -> result))
{
- if(arg -> result -> class != OBERON_TYPE_INTEGER)
- {
- oberon_error(ctx, "size must be integer");
- }
- arg = arg -> next;
+ oberon_error(ctx, "expected integer");
}
+ oberon_check_const(ctx, num);
- src -> item.num_args = num_sizes;
- src -> item.args = size_list;
+ n = num -> item.integer;
}
- else if(type -> class != OBERON_TYPE_RECORD)
+
+ int dim = 0;
+ oberon_type_t * arr = v -> result;
+ while(arr -> class == OBERON_TYPE_ARRAY)
{
- oberon_error(ctx, "oberon_make_new_call: wat");
+ dim += 1;
+ arr = arr -> base;
}
- if(num_args > max_args)
+ if(n < 0 || n > dim)
{
- oberon_error(ctx, "too mach arguments");
+ oberon_error(ctx, "not in range 0..%i", dim - 1);
}
- oberon_assign(ctx, src, dst);
+ assert(v -> is_item);
+
+ oberon_expr_t * expr;
+ expr = oberon_new_item(MODE_LEN, ctx -> int_type, true);
+ expr -> item.parent = (oberon_item_t *) v;
+ expr -> item.integer = n;
+ return expr;
+}
+
+static void
+oberon_new_const(oberon_context_t * ctx, char * name, oberon_expr_t * expr)
+{
+ oberon_object_t * constant;
+ constant = oberon_define_object(ctx -> decl, name, OBERON_CLASS_CONST, true, false, false);
+ oberon_check_const(ctx, expr);
+ constant -> value = (oberon_item_t *) expr;
+}
+
+static void
+register_default_types(oberon_context_t * ctx)
+{
+ ctx -> notype_type = oberon_new_type_ptr(OBERON_TYPE_NOTYPE);
+ oberon_generator_init_type(ctx, ctx -> notype_type);
+
+ ctx -> nil_type = oberon_new_type_ptr(OBERON_TYPE_NIL);
+ oberon_generator_init_type(ctx, ctx -> nil_type);
+
+ ctx -> string_type = oberon_new_type_string(1);
+ oberon_generator_init_type(ctx, ctx -> string_type);
+
+ ctx -> bool_type = oberon_new_type_boolean();
+ oberon_generator_init_type(ctx, ctx -> bool_type);
+
+ ctx -> char_type = oberon_new_type_char(1);
+ oberon_generator_init_type(ctx, ctx -> char_type);
+
+ ctx -> byte_type = oberon_new_type_integer(1);
+ oberon_generator_init_type(ctx, ctx -> byte_type);
+
+ ctx -> shortint_type = oberon_new_type_integer(2);
+ oberon_generator_init_type(ctx, ctx -> shortint_type);
+
+ ctx -> int_type = oberon_new_type_integer(4);
+ oberon_generator_init_type(ctx, ctx -> int_type);
+
+ ctx -> longint_type = oberon_new_type_integer(8);
+ oberon_generator_init_type(ctx, ctx -> longint_type);
+
+ ctx -> real_type = oberon_new_type_real(4);
+ oberon_generator_init_type(ctx, ctx -> real_type);
+
+ ctx -> longreal_type = oberon_new_type_real(8);
+ oberon_generator_init_type(ctx, ctx -> longreal_type);
+
+ ctx -> set_type = oberon_new_type_set(4);
+ oberon_generator_init_type(ctx, ctx -> set_type);
+
+ ctx -> system_byte_type = oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE);
+ oberon_generator_init_type(ctx, ctx -> system_byte_type);
+
+ ctx -> system_ptr_type = oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR);
+ oberon_generator_init_type(ctx, ctx -> system_ptr_type);
+
+ /* LONG / SHORT support */
+ ctx -> byte_type -> shorter = NULL;
+ ctx -> byte_type -> longer = ctx -> shortint_type;
+
+ ctx -> shortint_type -> shorter = ctx -> byte_type;
+ ctx -> shortint_type -> longer = ctx -> int_type;
+
+ ctx -> int_type -> shorter = ctx -> shortint_type;
+ ctx -> int_type -> longer = ctx -> longint_type;
+
+ ctx -> longint_type -> shorter = ctx -> int_type;
+ ctx -> longint_type -> longer = NULL;
+
+ ctx -> real_type -> shorter = NULL;
+ ctx -> real_type -> longer = ctx -> longreal_type;
+
+ ctx -> longreal_type -> shorter = ctx -> real_type;
+ ctx -> longreal_type -> longer = NULL;
+}
+
+static void
+oberon_new_intrinsic(oberon_context_t * ctx, char * name, GenerateFuncCallback f, GenerateProcCallback p)
+{
+ oberon_object_t * proc;
+ proc = oberon_define_object(ctx -> decl, name, OBERON_CLASS_PROC, true, false, false);
+ proc -> type = oberon_new_type_ptr(OBERON_TYPE_PROCEDURE);
+ proc -> type -> sysproc = true;
+ proc -> type -> genfunc = f;
+ proc -> type -> genproc = p;
+}
+
+static void oberon_new_intrinsic_type(oberon_context_t * ctx, char * name, oberon_type_t * type)
+{
+ oberon_object_t * id;
+ id = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE, true, false, false);
+ id -> type = type;
+}
+
+static void
+oberon_begin_intrinsic_module(oberon_context_t * ctx, char * name, oberon_module_t ** m)
+{
+ oberon_scope_t * module_scope;
+ module_scope = oberon_open_scope(ctx);
+
+ oberon_module_t * module;
+ module = GC_MALLOC(sizeof *module);
+ memset(module, 0, sizeof *module);
+ module -> name = name;
+ module -> intrinsic = true;
+ module -> decl = module_scope;
+ module -> next = ctx -> module_list;
+
+ ctx -> mod = module;
+ ctx -> module_list = module;
+
+ *m = module;
+}
+
+static void
+oberon_end_intrinsic_module(oberon_context_t * ctx, oberon_module_t * m)
+{
+ oberon_close_scope(m -> decl);
+ m -> ready = true;
+ ctx -> mod = NULL;
}
oberon_context_t *
oberon_create_context(ModuleImportCallback import_module)
{
- oberon_context_t * ctx = calloc(1, sizeof *ctx);
+ oberon_context_t * ctx = GC_MALLOC(sizeof *ctx);
+ memset(ctx, 0, sizeof *ctx);
oberon_scope_t * world_scope;
world_scope = oberon_open_scope(ctx);
oberon_generator_init_context(ctx);
+ /* Types */
register_default_types(ctx);
+
+ /* Constants */
+ oberon_new_const(ctx, "TRUE", oberon_make_boolean(ctx, true));
+ oberon_new_const(ctx, "FALSE", oberon_make_boolean(ctx, false));
+
+ /* Types */
+ oberon_new_intrinsic_type(ctx, "BOOLEAN", ctx -> bool_type);
+ oberon_new_intrinsic_type(ctx, "CHAR", ctx -> char_type);
+ oberon_new_intrinsic_type(ctx, "SHORTINT", ctx -> byte_type);
+ oberon_new_intrinsic_type(ctx, "INTEGER", ctx -> shortint_type);
+ oberon_new_intrinsic_type(ctx, "LONGINT", ctx -> int_type);
+ oberon_new_intrinsic_type(ctx, "HUGEINT", ctx -> longint_type);
+ oberon_new_intrinsic_type(ctx, "REAL", ctx -> real_type);
+ oberon_new_intrinsic_type(ctx, "LONGREAL", ctx -> longreal_type);
+ oberon_new_intrinsic_type(ctx, "SET", ctx -> set_type);
+
+ /* Functions */
oberon_new_intrinsic(ctx, "ABS", oberon_make_abs_call, NULL);
+ oberon_new_intrinsic(ctx, "ASH", oberon_make_ash_call, NULL);
+ oberon_new_intrinsic(ctx, "CAP", oberon_make_cap_call, NULL);
+ oberon_new_intrinsic(ctx, "CHR", oberon_make_chr_call, NULL);
+ oberon_new_intrinsic(ctx, "ENTIER", oberon_make_entier_call, NULL);
+ oberon_new_intrinsic(ctx, "LEN", oberon_make_len_call, NULL);
+ oberon_new_intrinsic(ctx, "LONG", oberon_make_long_call, NULL);
+ oberon_new_intrinsic(ctx, "MAX", oberon_make_max_call, NULL);
+ oberon_new_intrinsic(ctx, "MIN", oberon_make_min_call, NULL);
+ oberon_new_intrinsic(ctx, "ODD", oberon_make_odd_call, NULL);
+ oberon_new_intrinsic(ctx, "ORD", oberon_make_ord_call, NULL);
+ oberon_new_intrinsic(ctx, "SHORT", oberon_make_short_call, NULL);
+ oberon_new_intrinsic(ctx, "SIZE", oberon_make_size_call, NULL);
+
+ /* Procedures */
+ oberon_new_intrinsic(ctx, "ASSERT", NULL, oberon_make_assert_call);
+ oberon_new_intrinsic(ctx, "COPY", NULL, oberon_make_copy_call);
+ oberon_new_intrinsic(ctx, "DEC", NULL, oberon_make_dec_call);
+ oberon_new_intrinsic(ctx, "EXCL", NULL, oberon_make_excl_call);
+ oberon_new_intrinsic(ctx, "HALT", NULL, oberon_make_halt_call);
+ oberon_new_intrinsic(ctx, "INC", NULL, oberon_make_inc_call);
+ oberon_new_intrinsic(ctx, "INCL", NULL, oberon_make_incl_call);
oberon_new_intrinsic(ctx, "NEW", NULL, oberon_make_new_call);
+ /* MODULE SYSTEM */
+ oberon_begin_intrinsic_module(ctx, "SYSTEM", &ctx -> system_module);
+
+ /* Types */
+ oberon_new_intrinsic_type(ctx, "BYTE", ctx -> system_byte_type);
+ oberon_new_intrinsic_type(ctx, "PTR", ctx -> system_ptr_type);
+ oberon_new_intrinsic_type(ctx, "INT8", ctx -> byte_type);
+ oberon_new_intrinsic_type(ctx, "INT16", ctx -> shortint_type);
+ oberon_new_intrinsic_type(ctx, "INT32", ctx -> int_type);
+ oberon_new_intrinsic_type(ctx, "INT64", ctx -> longint_type);
+ oberon_new_intrinsic_type(ctx, "SET32", ctx -> set_type);
+
+ /* Functions */
+ oberon_new_intrinsic(ctx, "CC", oberon_make_cc_call, NULL);
+ oberon_new_intrinsic(ctx, "LSH", oberon_make_lsh_call, NULL);
+ oberon_new_intrinsic(ctx, "ROT", oberon_make_rot_call, NULL);
+ oberon_new_intrinsic(ctx, "VAL", oberon_make_val_call, NULL);
+
+ oberon_end_intrinsic_module(ctx, ctx -> system_module);
+
return ctx;
}
oberon_destroy_context(oberon_context_t * ctx)
{
oberon_generator_destroy_context(ctx);
- free(ctx);
}
oberon_module_t *
-oberon_compile_module(oberon_context_t * ctx, const char * newcode)
+oberon_compile_module(oberon_context_t * ctx, oberon_scanner_t * s)
{
const char * code = ctx -> code;
int code_index = ctx -> code_index;
+ oberon_location_t loc = ctx -> loc;
+ oberon_location_t xloc = ctx -> xloc;
char c = ctx -> c;
int token = ctx -> token;
char * string = ctx -> string;
int integer = ctx -> integer;
+ int real = ctx -> real;
+ bool longmode = ctx -> longmode;
oberon_scope_t * decl = ctx -> decl;
oberon_module_t * mod = ctx -> mod;
module_scope = oberon_open_scope(ctx);
oberon_module_t * module;
- module = calloc(1, sizeof *module);
+ module = GC_MALLOC(sizeof *module);
+ memset(module, 0, sizeof *module);
module -> decl = module_scope;
module -> next = ctx -> module_list;
ctx -> mod = module;
ctx -> module_list = module;
- oberon_init_scaner(ctx, newcode);
+ oberon_init_scaner(ctx, s);
oberon_parse_module(ctx);
module -> ready = 1;
ctx -> code = code;
ctx -> code_index = code_index;
+ ctx -> loc = loc;
+ ctx -> xloc = xloc;
ctx -> c = c;
ctx -> token = token;
ctx -> string = string;
ctx -> integer = integer;
+ ctx -> real = real;
+ ctx -> longmode = longmode;
ctx -> decl = decl;
ctx -> mod = mod;