diff --git a/src/oberon.c b/src/oberon.c
index f50f4d300246b4beed4fd6e58afaf21cb307cf3a..bf5dad872cbdc3c420dec670d8c5de40c463f5d3 100644 (file)
--- a/src/oberon.c
+++ b/src/oberon.c
#include <string.h>
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <stdbool.h>
+#include <math.h>
#include "../include/oberon.h"
#include "../include/oberon.h"
BEGIN,
ASSIGN,
INTEGER,
BEGIN,
ASSIGN,
INTEGER,
- TRUE,
- FALSE,
LPAREN,
RPAREN,
EQUAL,
LPAREN,
RPAREN,
EQUAL,
TYPE,
ARRAY,
OF,
TYPE,
ARRAY,
OF,
- LBRACE,
- RBRACE,
+ LBRACK,
+ RBRACK,
RECORD,
POINTER,
TO,
RECORD,
POINTER,
TO,
REPEAT,
UNTIL,
FOR,
REPEAT,
UNTIL,
FOR,
- BY
+ BY,
+ LOOP,
+ EXIT,
+ LBRACE,
+ RBRACE,
+ DOTDOT,
+ CASE,
+ BAR,
+ WITH
};
// =======================================================================
};
// =======================================================================
return x;
}
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;
+}
+
// =======================================================================
// TABLE
// =======================================================================
// =======================================================================
// TABLE
// =======================================================================
scope -> local = scope -> up -> local;
scope -> parent = scope -> up -> parent;
scope -> parent_type = scope -> up -> parent_type;
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;
{
ctx -> token = BEGIN;
}
{
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;
else if(strcmp(ident, "OR") == 0)
{
ctx -> token = OR;
{
ctx -> token = BY;
}
{
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)
{
static void
oberon_read_number(oberon_context_t * ctx)
{
end_i = ctx -> code_index;
end_i = ctx -> code_index;
- if(isxdigit(ctx -> c))
+ if(ISHEXDIGIT(ctx -> c))
{
mode = 1;
{
mode = 1;
- while(isxdigit(ctx -> c))
+ while(ISHEXDIGIT(ctx -> c))
{
oberon_get_char(ctx);
}
{
oberon_get_char(ctx);
}
}
else if(ctx -> c == '.')
{
}
else if(ctx -> c == '.')
{
- mode = 2;
oberon_get_char(ctx);
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;
-
- if(ctx -> c == 'D')
- {
- mode = 3;
- }
-
- oberon_get_char(ctx);
+ mode = 2;
- if(ctx -> c == '+' || ctx -> c == '-')
+ while(isdigit(ctx -> c))
{
oberon_get_char(ctx);
}
{
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);
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;
}
end_i = ctx -> code_index;
}
ctx -> token = STRING;
ctx -> string = string;
ctx -> token = STRING;
ctx -> string = string;
-
- printf("oberon_read_string: string ((%s))\n", string);
}
static void oberon_read_token(oberon_context_t * ctx);
}
static void oberon_read_token(oberon_context_t * ctx);
case '.':
ctx -> token = DOT;
oberon_get_char(ctx);
case '.':
ctx -> token = DOT;
oberon_get_char(ctx);
+ if(ctx -> c == '.')
+ {
+ ctx -> token = DOTDOT;
+ oberon_get_char(ctx);
+ }
break;
case '(':
ctx -> token = LPAREN;
break;
case '(':
ctx -> token = LPAREN;
oberon_get_char(ctx);
break;
case '[':
oberon_get_char(ctx);
break;
case '[':
- ctx -> token = LBRACE;
+ ctx -> token = LBRACK;
oberon_get_char(ctx);
break;
case ']':
oberon_get_char(ctx);
break;
case ']':
- ctx -> token = RBRACE;
+ ctx -> token = RBRACK;
oberon_get_char(ctx);
break;
case '^':
oberon_get_char(ctx);
break;
case '^':
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;
default:
oberon_error(ctx, "invalid char %c", ctx -> c);
break;
if(token == MINUS)
{
if(token == MINUS)
{
- if(result -> class != OBERON_TYPE_INTEGER)
+ if(result -> class == OBERON_TYPE_SET)
+ {
+ expr = oberon_new_operator(OP_COMPLEMENTATION, result, a, NULL);
+ }
+ else if(result -> class == OBERON_TYPE_INTEGER)
+ {
+ expr = oberon_new_operator(OP_UNARY_MINUS, result, a, NULL);
+ }
+ else
{
oberon_error(ctx, "incompatible operator type");
}
{
oberon_error(ctx, "incompatible operator type");
}
-
- expr = oberon_new_operator(OP_UNARY_MINUS, result, a, NULL);
}
else if(token == NOT)
{
}
else if(token == NOT)
{
@@ -929,11 +984,8 @@ oberno_make_record_cast(oberon_context_t * ctx, oberon_expr_t * expr, oberon_typ
oberon_type_t * from = expr -> result;
oberon_type_t * to = rec;
oberon_type_t * from = expr -> result;
oberon_type_t * to = rec;
- printf("oberno_make_record_cast: from class %i to class %i\n", from -> class, to -> class);
-
if(from -> class == OBERON_TYPE_POINTER && to -> class == OBERON_TYPE_POINTER)
{
if(from -> class == OBERON_TYPE_POINTER && to -> class == OBERON_TYPE_POINTER)
{
- printf("oberno_make_record_cast: pointers\n");
from = from -> base;
to = to -> base;
}
from = from -> base;
to = to -> base;
}
@@ -1000,23 +1052,73 @@ oberon_check_record_compatibility(oberon_context_t * ctx, oberon_type_t * from,
}
}
}
}
+static void
+oberon_check_dst(oberon_context_t * ctx, oberon_expr_t * dst)
+{
+ if(dst -> is_item == false)
+ {
+ 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");
+ }
+ }
+}
+
static oberon_expr_t *
oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
{
// Допускается:
// Если классы типов равны
// Если INTEGER переводится в REAL
static oberon_expr_t *
oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
{
// Допускается:
// Если классы типов равны
// Если INTEGER переводится в REAL
+ // Есди STRING переводится в CHAR
// Есди STRING переводится в ARRAY OF CHAR
// Есди STRING переводится в ARRAY OF CHAR
+ oberon_check_src(ctx, expr);
+
bool error = false;
if(pref -> class != expr -> result -> class)
{
bool error = false;
if(pref -> class != expr -> result -> class)
{
- printf("expr class %i\n", expr -> result -> class);
- printf("pref class %i\n", pref -> class);
-
if(expr -> result -> class == OBERON_TYPE_STRING)
{
if(expr -> result -> class == OBERON_TYPE_STRING)
{
- if(pref -> class == OBERON_TYPE_ARRAY)
+ if(pref -> class == OBERON_TYPE_CHAR)
+ {
+ if(expr -> is_item && expr -> item.mode == MODE_STRING)
+ {
+ if(strlen(expr -> item.string) != 1)
+ {
+ error = true;
+ }
+ }
+ else
+ {
+ error = true;
+ }
+ }
+ else if(pref -> class == OBERON_TYPE_ARRAY)
{
if(pref -> base -> class != OBERON_TYPE_CHAR)
{
{
if(pref -> base -> class != OBERON_TYPE_CHAR)
{
@@ -1046,7 +1148,16 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
oberon_error(ctx, "oberon_autocast_to: incompatible types");
}
oberon_error(ctx, "oberon_autocast_to: incompatible types");
}
- if(pref -> class == OBERON_TYPE_INTEGER || pref -> class == OBERON_TYPE_REAL)
+ if(pref -> class == OBERON_TYPE_CHAR)
+ {
+ if(expr -> result -> class == OBERON_TYPE_STRING)
+ {
+ int c = expr -> item.string[0];
+ expr = oberon_new_item(MODE_CHAR, ctx -> char_type, true);
+ expr -> item.integer = c;
+ }
+ }
+ else if(pref -> class == OBERON_TYPE_INTEGER || pref -> class == OBERON_TYPE_REAL)
{
if(expr -> result -> size > pref -> size)
{
{
if(expr -> result -> size > pref -> size)
{
{
if(param -> class == OBERON_CLASS_VAR_PARAM)
{
{
if(param -> class == OBERON_CLASS_VAR_PARAM)
{
+ if(arg -> result != param -> type)
+ {
+ oberon_error(ctx, "incompatible type");
+ }
if(arg -> read_only)
{
oberon_error(ctx, "assign to read-only var");
}
if(arg -> read_only)
{
oberon_error(ctx, "assign to read-only var");
}
+ casted[i] = arg;
+ }
+ else
+ {
+ casted[i] = oberon_autocast_to(ctx, arg, param -> type);
}
}
- casted[i] = oberon_autocast_to(ctx, arg, param -> type);
arg = arg -> next;
param = param -> next;
}
arg = arg -> next;
param = param -> next;
}
@@ -1217,58 +1336,6 @@ oberon_make_call_proc(oberon_context_t * ctx, oberon_item_t * item, int num_args
}
}
}
}
-/*
-static void
-oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_args, oberon_expr_t * list_args)
-{
- switch(proc -> class)
- {
- 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;
- }
-
- if(proc -> sysproc)
- {
- if(proc -> genproc == NULL)
- {
- oberon_error(ctx, "requres non-typed procedure");
- }
-
- proc -> genproc(ctx, num_args, list_args);
- }
- else
- {
- if(proc -> type -> base -> class != OBERON_TYPE_VOID)
- {
- 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 -> item.num_args = num_args;
- call -> item.args = list_args;
- oberon_autocast_call(ctx, call);
- oberon_generate_call_proc(ctx, call);
- }
-}
-*/
-
#define ISEXPR(x) \
(((x) == PLUS) \
|| ((x) == MINUS) \
#define ISEXPR(x) \
(((x) == PLUS) \
|| ((x) == MINUS) \
@@ -1279,14 +1346,11 @@ oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_ar
|| ((x) == STRING) \
|| ((x) == NIL) \
|| ((x) == LPAREN) \
|| ((x) == STRING) \
|| ((x) == NIL) \
|| ((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)
{
static oberon_expr_t *
oberno_make_dereferencing(oberon_context_t * ctx, oberon_expr_t * expr)
{
- printf("oberno_make_dereferencing\n");
if(expr -> result -> class != OBERON_TYPE_POINTER)
{
oberon_error(ctx, "not a pointer");
if(expr -> result -> class != OBERON_TYPE_POINTER)
{
oberon_error(ctx, "not a pointer");
@@ -1396,7 +1460,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
}
#define ISSELECTOR(x) \
}
#define ISSELECTOR(x) \
- (((x) == LBRACE) \
+ (((x) == LBRACK) \
|| ((x) == DOT) \
|| ((x) == UPARROW) \
|| ((x) == LPAREN))
|| ((x) == DOT) \
|| ((x) == UPARROW) \
|| ((x) == LPAREN))
}
static oberon_expr_t *
}
static oberon_expr_t *
-oberon_designator(oberon_context_t * ctx)
+oberon_qualident_expr(oberon_context_t * ctx)
{
{
- char * name;
oberon_object_t * var;
oberon_expr_t * expr;
oberon_object_t * var;
oberon_expr_t * expr;
// TODO copy value
expr = (oberon_expr_t *) var -> value;
break;
// 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:
case OBERON_CLASS_VAR:
case OBERON_CLASS_VAR_PARAM:
case OBERON_CLASS_PARAM:
oberon_error(ctx, "invalid designator");
break;
}
oberon_error(ctx, "invalid designator");
break;
}
+
expr -> item.var = var;
expr -> item.var = var;
+ return expr;
+}
+
+static oberon_expr_t *
+oberon_designator(oberon_context_t * ctx)
+{
+ char * name;
+ oberon_expr_t * expr;
+
+ expr = oberon_qualident_expr(ctx);
+
while(expr -> result -> class != OBERON_TYPE_PROCEDURE && ISSELECTOR(ctx -> token))
{
switch(ctx -> token)
while(expr -> result -> class != OBERON_TYPE_PROCEDURE && ISSELECTOR(ctx -> token))
{
switch(ctx -> token)
name = oberon_assert_ident(ctx);
expr = oberon_make_record_selector(ctx, expr, name);
break;
name = oberon_assert_ident(ctx);
expr = oberon_make_record_selector(ctx, expr, name);
break;
- case LBRACE:
- oberon_assert_token(ctx, LBRACE);
+ case LBRACK:
+ oberon_assert_token(ctx, LBRACK);
int num_indexes = 0;
oberon_expr_t * indexes = NULL;
oberon_expr_list(ctx, &num_indexes, &indexes, 0);
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++)
{
for(int i = 0; i < num_indexes; i++)
{
return expr;
}
return expr;
}
+static oberon_expr_t *
+oberon_element(oberon_context_t * ctx)
+{
+ oberon_expr_t * e1;
+ oberon_expr_t * e2;
+
+ e1 = oberon_expr(ctx);
+ 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);
+ if(e2 -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "expected integer");
+ }
+ }
+
+ oberon_expr_t * set;
+ set = oberon_new_operator(OP_RANGE, ctx -> set_type, e1, e2);
+ return set;
+}
+
+static oberon_expr_t *
+oberon_set(oberon_context_t * ctx)
+{
+ oberon_expr_t * set;
+ oberon_expr_t * elements;
+ set = oberon_new_item(MODE_SET, ctx -> set_type, true);
+ set -> item.integer = 0;
+
+ oberon_assert_token(ctx, LBRACE);
+ if(ISEXPR(ctx -> token))
+ {
+ elements = oberon_element(ctx);
+ set = oberon_new_operator(OP_UNION, ctx -> set_type, set, elements);
+ while(ctx -> token == COMMA)
+ {
+ oberon_assert_token(ctx, COMMA);
+ elements = oberon_element(ctx);
+ set = oberon_new_operator(OP_UNION, ctx -> set_type, set, elements);
+ }
+ }
+ oberon_assert_token(ctx, RBRACE);
+
+ return set;
+}
+
+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;
+ return expr;
+}
+
static oberon_expr_t *
oberon_factor(oberon_context_t * ctx)
{
static oberon_expr_t *
oberon_factor(oberon_context_t * ctx)
{
expr -> item.real = ctx -> real;
oberon_assert_token(ctx, REAL);
break;
expr -> item.real = ctx -> real;
oberon_assert_token(ctx, REAL);
break;
- case TRUE:
- expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, true);
- expr -> item.boolean = true;
- oberon_assert_token(ctx, TRUE);
- break;
- case FALSE:
- expr = oberon_new_item(MODE_BOOLEAN, ctx -> bool_type, true);
- expr -> item.boolean = false;
- oberon_assert_token(ctx, FALSE);
+ case LBRACE:
+ expr = oberon_set(ctx);
break;
case LPAREN:
oberon_assert_token(ctx, LPAREN);
break;
case LPAREN:
oberon_assert_token(ctx, LPAREN);
@@ -1719,7 +1852,61 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
oberon_expr_t * expr;
oberon_type_t * result;
oberon_expr_t * expr;
oberon_type_t * result;
- if(ITMAKESBOOLEAN(token))
+ bool error = false;
+ if(token == IN)
+ {
+ if(a -> result -> class != OBERON_TYPE_INTEGER)
+ {
+ oberon_error(ctx, "must be integer");
+ }
+
+ if(b -> result -> class != OBERON_TYPE_SET)
+ {
+ oberon_error(ctx, "must be set");
+ }
+
+ result = ctx -> bool_type;
+ expr = oberon_new_operator(OP_IN, result, a, b);
+ }
+ else if(token == IS)
+ {
+ oberon_type_t * v = a -> result;
+ if(v -> class == OBERON_TYPE_POINTER)
+ {
+ v = v -> base;
+ if(v -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "must be record");
+ }
+ }
+ else if(v -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "must be record");
+ }
+
+ if(b -> is_item == false || b -> item.mode != MODE_TYPE)
+ {
+ oberon_error(ctx, "requires type");
+ }
+
+ oberon_type_t * t = b -> result;
+ if(t -> class == OBERON_TYPE_POINTER)
+ {
+ t = t -> base;
+ if(t -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "must be record");
+ }
+ }
+ else if(t -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "must be record");
+ }
+
+ result = ctx -> bool_type;
+ expr = oberon_new_operator(OP_IS, result, a, b);
+ }
+ else if(ITMAKESBOOLEAN(token))
{
if(ITUSEONLYINTEGER(token))
{
{
if(ITUSEONLYINTEGER(token))
{
@@ -1786,10 +1973,21 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
}
else if(token == SLASH)
{
}
else if(token == SLASH)
{
- oberon_autocast_to_real(ctx, &a);
- oberon_autocast_to_real(ctx, &b);
- oberon_autocast_binary_op(ctx, &a, &b);
- expr = oberon_new_operator(OP_DIV, a -> result, a, b);
+ if(a -> result -> class == OBERON_TYPE_SET
+ || b -> result -> class == OBERON_TYPE_SET)
+ {
+ oberon_autocast_binary_op(ctx, &a, &b);
+ result = a -> result;
+ expr = oberon_new_operator(OP_SYM_DIFFERENCE, result, a, b);
+ }
+ else
+ {
+ oberon_autocast_to_real(ctx, &a);
+ oberon_autocast_to_real(ctx, &b);
+ oberon_autocast_binary_op(ctx, &a, &b);
+ result = a -> result;
+ expr = oberon_new_operator(OP_DIV, result, a, b);
+ }
}
else if(token == DIV)
{
}
else if(token == DIV)
{
@@ -1805,29 +2003,58 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
else
{
oberon_autocast_binary_op(ctx, &a, &b);
else
{
oberon_autocast_binary_op(ctx, &a, &b);
-
- if(token == PLUS)
- {
- expr = oberon_new_operator(OP_ADD, a -> result, a, b);
- }
- else if(token == MINUS)
- {
- expr = oberon_new_operator(OP_SUB, a -> result, a, b);
- }
- else if(token == STAR)
+ result = a -> result;
+ if(result -> class == OBERON_TYPE_SET)
{
{
- expr = oberon_new_operator(OP_MUL, a -> result, a, b);
+ 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:
+ error = true;
+ break;
+ }
}
}
- else if(token == MOD)
+ else if(result -> class == OBERON_TYPE_INTEGER
+ || result -> class == OBERON_TYPE_REAL)
{
{
- expr = oberon_new_operator(OP_MOD, a -> result, a, b);
+ 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 MOD:
+ expr = oberon_new_operator(OP_MOD, result, a, b);
+ break;
+ default:
+ error = true;
+ break;
+ }
}
else
{
}
else
{
- oberon_error(ctx, "oberon_make_bin_op: bin wat");
+ error = true;
}
}
}
}
+ if(error)
+ {
+ oberon_error(ctx, "invalid operation");
+ }
+
return expr;
}
return expr;
}
return expr;
}
return expr;
}
-static oberon_item_t *
-oberon_const_expr(oberon_context_t * ctx)
+static void
+oberon_check_const(oberon_context_t * ctx, oberon_expr_t * expr)
{
{
- oberon_expr_t * expr;
- expr = oberon_expr(ctx);
-
if(expr -> is_item == 0)
{
oberon_error(ctx, "const expression are required");
if(expr -> is_item == 0)
{
oberon_error(ctx, "const expression are required");
case MODE_REAL:
case MODE_CHAR:
case MODE_STRING:
case MODE_REAL:
case MODE_CHAR:
case MODE_STRING:
+ case MODE_TYPE:
/* accept */
break;
default:
oberon_error(ctx, "const expression are required");
break;
}
/* accept */
break;
default:
oberon_error(ctx, "const expression are required");
break;
}
+}
+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;
}
return (oberon_item_t *) expr;
}
signature = oberon_new_type_ptr(OBERON_TYPE_VOID);
oberon_opt_formal_pars(ctx, &signature);
signature = oberon_new_type_ptr(OBERON_TYPE_VOID);
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);
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)
+ 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)
{
{
if(proc -> class != OBERON_CLASS_PROC)
{
oberon_compare_signatures(ctx, proc -> type, signature);
}
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, false);
- 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;
if(forward == 0)
{
proc -> linked = 1;
@@ -2636,6 +2874,11 @@ oberon_prevent_recursive_record(oberon_context_t * ctx, oberon_type_t * type)
type -> recursive = 1;
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++)
int num_fields = type -> num_decl;
oberon_object_t * field = type -> decl;
for(int i = 0; i < num_fields; i++)
@@ -2977,10 +3220,172 @@ oberon_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
oberon_error(ctx, "read-only destination");
}
oberon_error(ctx, "read-only destination");
}
+ oberon_check_dst(ctx, dst);
src = oberon_autocast_to(ctx, src, dst -> result);
oberon_generate_assign(ctx, src, dst);
}
src = oberon_autocast_to(ctx, src, dst -> result);
oberon_generate_assign(ctx, src, dst);
}
+static oberon_expr_t *
+oberon_case_labels(oberon_context_t * ctx, oberon_expr_t * val)
+{
+ oberon_expr_t * e1;
+ oberon_expr_t * e2;
+ oberon_expr_t * cond;
+ oberon_expr_t * cond2;
+
+ e1 = (oberon_expr_t *) oberon_const_expr(ctx);
+ oberon_autocast_to(ctx, e1, val -> result);
+
+ e2 = NULL;
+ if(ctx -> token == DOTDOT)
+ {
+ oberon_assert_token(ctx, DOTDOT);
+ e2 = (oberon_expr_t *) oberon_const_expr(ctx);
+ oberon_autocast_to(ctx, e2, val -> result);
+ }
+
+ if(e2 == NULL)
+ {
+ /* val == e1 */
+ cond = oberon_make_bin_op(ctx, EQUAL, val, e1);
+ }
+ else
+ {
+ /* 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);
+ }
+
+ return cond;
+}
+
+static void
+oberon_case(oberon_context_t * ctx, oberon_expr_t * val, gen_label_t * end)
+{
+ oberon_expr_t * cond;
+ oberon_expr_t * cond2;
+ gen_label_t * this_end;
+
+ if(ISEXPR(ctx -> token))
+ {
+ this_end = oberon_generator_reserve_label(ctx);
+
+ 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);
+
+ oberon_generate_branch(ctx, cond, false, this_end);
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, end);
+
+ oberon_generate_label(ctx, this_end);
+ }
+}
+
+static void
+oberon_case_statement(oberon_context_t * ctx)
+{
+ oberon_expr_t * val;
+ oberon_expr_t * expr;
+ gen_label_t * end;
+
+ end = oberon_generator_reserve_label(ctx);
+
+ 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_assert_token(ctx, BAR);
+ oberon_case(ctx, val, end);
+ }
+
+ if(ctx -> token == ELSE)
+ {
+ oberon_assert_token(ctx, ELSE);
+ oberon_statement_seq(ctx);
+ }
+
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+}
+
+static void
+oberon_with_guard_do(oberon_context_t * ctx, gen_label_t * end)
+{
+ oberon_expr_t * val;
+ oberon_expr_t * var;
+ oberon_expr_t * type;
+ oberon_expr_t * cond;
+ oberon_expr_t * cast;
+ oberon_type_t * old_type;
+ gen_var_t * old_var;
+ gen_label_t * this_end;
+
+ this_end = oberon_generator_reserve_label(ctx);
+
+ var = oberon_qualident_expr(ctx);
+ oberon_assert_token(ctx, COLON);
+ type = oberon_qualident_expr(ctx);
+ cond = oberon_make_bin_op(ctx, IS, var, type);
+
+ oberon_assert_token(ctx, DO);
+ oberon_generate_branch(ctx, cond, false, this_end);
+
+ /* Сохраняем ссылку во временной переменной */
+ val = oberon_make_temp_var_item(ctx, type -> result);
+ cast = oberno_make_record_cast(ctx, var, type -> result);
+ oberon_assign(ctx, cast, val);
+ /* Подменяем тип у оригинальной переменной */
+ old_type = var -> item.var -> type;
+ var -> item.var -> type = type -> result;
+ /* Подменяем ссылку на переменную */
+ old_var = var -> item.var -> gen_var;
+ var -> item.var -> gen_var = val -> item.var -> gen_var;
+
+ oberon_statement_seq(ctx);
+ oberon_generate_goto(ctx, end);
+ oberon_generate_label(ctx, this_end);
+
+ /* Возвращаем исходное состояние */
+ var -> item.var -> gen_var = old_var;
+ var -> item.var -> type = old_type;
+}
+
+static void
+oberon_with_statement(oberon_context_t * ctx)
+{
+ gen_label_t * end;
+ end = oberon_generator_reserve_label(ctx);
+
+ 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);
+ }
+
+ oberon_generate_label(ctx, end);
+ oberon_assert_token(ctx, END);
+}
+
static void
oberon_statement(oberon_context_t * ctx)
{
static void
oberon_statement(oberon_context_t * ctx)
{
oberon_generate_label(ctx, end);
oberon_assert_token(ctx, END);
}
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);
else if(ctx -> token == RETURN)
{
oberon_assert_token(ctx, RETURN);
oberon_assert_token(ctx, END);
name2 = oberon_assert_ident(ctx);
oberon_assert_token(ctx, END);
name2 = oberon_assert_ident(ctx);
- oberon_assert_token(ctx, DOT);
+ oberon_expect_token(ctx, DOT);
if(strcmp(name1, name2) != 0)
{
if(strcmp(name1, name2) != 0)
{
ctx -> bool_type = oberon_new_type_boolean();
oberon_define_type(ctx -> world_scope, "BOOLEAN", ctx -> bool_type, 1);
ctx -> bool_type = oberon_new_type_boolean();
oberon_define_type(ctx -> world_scope, "BOOLEAN", ctx -> bool_type, 1);
+ ctx -> char_type = oberon_new_type_char(1);
+ oberon_define_type(ctx -> world_scope, "CHAR", ctx -> char_type, 1);
+
ctx -> byte_type = oberon_new_type_integer(1);
ctx -> byte_type = oberon_new_type_integer(1);
- oberon_define_type(ctx -> world_scope, "BYTE", ctx -> byte_type, 1);
+ oberon_define_type(ctx -> world_scope, "SHORTINT", ctx -> byte_type, 1);
ctx -> shortint_type = oberon_new_type_integer(2);
ctx -> shortint_type = oberon_new_type_integer(2);
- oberon_define_type(ctx -> world_scope, "SHORTINT", ctx -> shortint_type, 1);
+ oberon_define_type(ctx -> world_scope, "INTEGER", ctx -> shortint_type, 1);
ctx -> int_type = oberon_new_type_integer(4);
ctx -> int_type = oberon_new_type_integer(4);
- oberon_define_type(ctx -> world_scope, "INTEGER", ctx -> int_type, 1);
+ oberon_define_type(ctx -> world_scope, "LONGINT", ctx -> int_type, 1);
ctx -> longint_type = oberon_new_type_integer(8);
ctx -> longint_type = oberon_new_type_integer(8);
- oberon_define_type(ctx -> world_scope, "LONGINT", ctx -> longint_type, 1);
+ oberon_define_type(ctx -> world_scope, "HUGEINT", ctx -> longint_type, 1);
ctx -> real_type = oberon_new_type_real(4);
oberon_define_type(ctx -> world_scope, "REAL", ctx -> real_type, 1);
ctx -> real_type = oberon_new_type_real(4);
oberon_define_type(ctx -> world_scope, "REAL", ctx -> real_type, 1);
ctx -> longreal_type = oberon_new_type_real(8);
oberon_define_type(ctx -> world_scope, "LONGREAL", ctx -> longreal_type, 1);
ctx -> longreal_type = oberon_new_type_real(8);
oberon_define_type(ctx -> world_scope, "LONGREAL", ctx -> longreal_type, 1);
- ctx -> char_type = oberon_new_type_char(1);
- oberon_define_type(ctx -> world_scope, "CHAR", ctx -> char_type, 1);
+ ctx -> set_type = oberon_new_type_set(4);
+ oberon_define_type(ctx -> world_scope, "SET", ctx -> set_type, 1);
}
static void
}
static void
@@ -3344,6 +3787,126 @@ oberon_new_intrinsic(oberon_context_t * ctx, char * name, GenerateFuncCallback f
proc -> type -> genproc = p;
}
proc -> type -> genproc = p;
}
+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(!arg -> is_item || arg -> item.mode != MODE_TYPE)
+ {
+ 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_integer_item(ctx, -powl(2, bits - 1));
+ break;
+ case OBERON_TYPE_SET:
+ expr = oberon_integer_item(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(!arg -> is_item || arg -> item.mode != MODE_TYPE)
+ {
+ 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_integer_item(ctx, powl(2, bits - 1) - 1);
+ break;
+ case OBERON_TYPE_SET:
+ expr = oberon_integer_item(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(!arg -> is_item || arg -> item.mode != MODE_TYPE)
+ {
+ 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_integer_item(ctx, size);
+ return expr;
+}
+
static oberon_expr_t *
oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
{
static oberon_expr_t *
oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
{
@@ -3359,6 +3922,7 @@ oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_expr_t * arg;
arg = list_args;
oberon_expr_t * arg;
arg = list_args;
+ oberon_check_src(ctx, arg);
oberon_type_t * result_type;
result_type = arg -> result;
oberon_type_t * result_type;
result_type = arg -> result;
@@ -3368,7 +3932,6 @@ oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_error(ctx, "ABS accepts only integers");
}
oberon_error(ctx, "ABS accepts only integers");
}
-
oberon_expr_t * expr;
expr = oberon_new_operator(OP_ABS, result_type, arg, NULL);
return expr;
oberon_expr_t * expr;
expr = oberon_new_operator(OP_ABS, result_type, arg, NULL);
return expr;
@@ -3382,8 +3945,10 @@ oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_error(ctx, "too few arguments");
}
oberon_error(ctx, "too few arguments");
}
+
oberon_expr_t * dst;
dst = list_args;
oberon_expr_t * dst;
dst = list_args;
+ oberon_check_dst(ctx, dst);
oberon_type_t * type;
type = dst -> result;
oberon_type_t * type;
type = dst -> result;
@@ -3432,6 +3997,7 @@ oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_expr_t * arg = size_list;
for(int i = 0; i < max_args - 1; i++)
{
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");
if(arg -> result -> class != OBERON_TYPE_INTEGER)
{
oberon_error(ctx, "size must be integer");
@@ -3455,6 +4021,15 @@ oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
oberon_assign(ctx, src, dst);
}
oberon_assign(ctx, src, dst);
}
+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;
+}
+
oberon_context_t *
oberon_create_context(ModuleImportCallback import_module)
{
oberon_context_t *
oberon_create_context(ModuleImportCallback import_module)
{
oberon_generator_init_context(ctx);
register_default_types(ctx);
oberon_generator_init_context(ctx);
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));
+
+ /* Functions */
oberon_new_intrinsic(ctx, "ABS", oberon_make_abs_call, NULL);
oberon_new_intrinsic(ctx, "ABS", oberon_make_abs_call, NULL);
+ oberon_new_intrinsic(ctx, "MIN", oberon_make_min_call, NULL);
+ oberon_new_intrinsic(ctx, "MAX", oberon_make_max_call, NULL);
+ oberon_new_intrinsic(ctx, "SIZE", oberon_make_size_call, NULL);
+
+ /* Procedures */
oberon_new_intrinsic(ctx, "NEW", NULL, oberon_make_new_call);
return ctx;
oberon_new_intrinsic(ctx, "NEW", NULL, oberon_make_new_call);
return ctx;