diff --git a/src/oberon.c b/src/oberon.c
index 0118ff9bfceded3989c464ed1a6f9fb59645a6be..6cc5d1d193787867c68e74c0aec302d40a6022e0 100644 (file)
--- a/src/oberon.c
+++ b/src/oberon.c
LEQ,
GREAT,
GEQ,
+ IN,
+ IS,
PLUS,
MINUS,
OR,
UPARROW,
NIL,
IMPORT,
- REAL
+ REAL,
+ CHAR
};
// =======================================================================
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;
+}
+
// =======================================================================
// TABLE
// =======================================================================
{
ctx -> token = IMPORT;
}
+ else if(strcmp(ident, "IN") == 0)
+ {
+ ctx -> token = IN;
+ }
+ else if(strcmp(ident, "IS") == 0)
+ {
+ ctx -> token = IS;
+ }
}
static void
* 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(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 == '.')
{
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);
memcpy(ident, &ctx -> code[start_i], len);
sscanf(ident, "%lf", &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;
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 * oberno_make_dereferencing(oberon_context_t * ctx, oberon_expr_t * expr);
static oberon_expr_t *
oberon_new_operator(int op, oberon_type_t * result, oberon_expr_t * left, oberon_expr_t * right)
@@ -736,7 +786,14 @@ 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);
@@ -760,11 +817,30 @@ oberon_expr_list(oberon_context_t * ctx, int * num_expr, oberon_expr_t ** first,
static oberon_expr_t *
oberon_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
{
- oberon_expr_t * cast;
- cast = oberon_new_item(MODE_CAST, pref, expr -> read_only);
- cast -> item.parent = expr;
- cast -> next = expr -> next;
- return cast;
+ return oberon_new_operator(OP_CAST, pref, expr, NULL);
+}
+
+static oberon_expr_t *
+oberno_make_record_cast(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * 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)
+ {
+ printf("oberno_make_record_cast: pointers\n");
+ from = from -> base;
+ to = to -> base;
+ }
+
+ if(from -> class != OBERON_TYPE_RECORD || to -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "must be record type");
+ }
+
+ return oberon_cast_expr(ctx, expr, rec);
}
static oberon_type_t *
@@ -795,39 +871,60 @@ oberon_get_equal_expr_type(oberon_context_t * ctx, oberon_type_t * a, oberon_typ
return result;
}
+static void
+oberon_check_record_compatibility(oberon_context_t * ctx, oberon_type_t * from, oberon_type_t * to)
+{
+ if(from -> class == OBERON_TYPE_POINTER && to -> class == OBERON_TYPE_POINTER)
+ {
+ from = from -> base;
+ to = to -> base;
+ }
+
+ if(from -> class != OBERON_TYPE_RECORD || to -> class != OBERON_TYPE_RECORD)
+ {
+ oberon_error(ctx, "not a record");
+ }
+
+ oberon_type_t * t = from;
+ while(t != NULL && t != to)
+ {
+ t = t -> base;
+ }
+
+ if(t == NULL)
+ {
+ oberon_error(ctx, "incompatible record types");
+ }
+}
+
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
+
+ bool error = false;
if(pref -> class != expr -> result -> class)
{
- if(pref -> class == OBERON_TYPE_POINTER)
+ if(expr -> result -> class == OBERON_TYPE_INTEGER)
{
- if(expr -> result -> class == OBERON_TYPE_POINTER)
+ if(pref -> class != OBERON_TYPE_REAL)
{
- // accept
- }
- else
- {
- oberon_error(ctx, "incompatible types");
- }
- }
- else if(pref -> class == OBERON_TYPE_REAL)
- {
- if(expr -> result -> class == OBERON_TYPE_INTEGER)
- {
- // accept
- }
- else
- {
- oberon_error(ctx, "incompatible types");
+ error = true;
}
}
else
{
- oberon_error(ctx, "incompatible types");
+ error = true;
}
}
+ if(error)
+ {
+ oberon_error(ctx, "incompatible types");
+ }
+
if(pref -> class == OBERON_TYPE_INTEGER || pref -> class == OBERON_TYPE_REAL)
{
if(expr -> result -> size > pref -> size)
@@ -841,15 +938,17 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
}
else if(pref -> class == OBERON_TYPE_RECORD)
{
- if(expr -> result != pref)
- {
- printf("oberon_autocast_to: rec %p != %p\n", expr -> result, pref);
- oberon_error(ctx, "incompatible record types");
- }
+ oberon_check_record_compatibility(ctx, expr -> result, pref);
}
else if(pref -> class == OBERON_TYPE_POINTER)
{
- if(expr -> result -> base != pref -> base)
+ assert(pref -> base);
+ if(expr -> result -> base -> class == OBERON_TYPE_RECORD)
+ {
+ oberon_check_record_compatibility(ctx, expr -> result, pref);
+ expr = oberno_make_record_cast(ctx, expr, pref);
+ }
+ else if(expr -> result -> base != pref -> base)
{
if(expr -> result -> base -> class != OBERON_TYPE_VOID)
{
@@ -872,25 +971,15 @@ oberon_autocast_binary_op(oberon_context_t * ctx, oberon_expr_t ** ea, oberon_ex
}
static void
-oberon_autocast_call(oberon_context_t * ctx, oberon_expr_t * desig)
+oberon_autocast_call(oberon_context_t * ctx, oberon_item_t * desig)
{
- if(desig -> is_item == 0)
- {
- oberon_error(ctx, "expected item");
- }
-
- if(desig -> item.mode != MODE_CALL)
+ if(desig -> mode != MODE_CALL)
{
oberon_error(ctx, "expected mode CALL");
}
- if(desig -> item.var -> type -> class != OBERON_TYPE_PROCEDURE)
- {
- oberon_error(ctx, "only procedures can be called");
- }
-
- 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)
/* Делаем проверку на запись и делаем автокаст */
oberon_expr_t * casted[num_args];
- oberon_expr_t * arg = desig -> item.args;
+ oberon_expr_t * arg = desig -> args;
oberon_object_t * param = fn -> decl;
for(int i = 0; i < num_args; i++)
{
{
casted[i] -> next = casted[i + 1];
}
- desig -> item.args = arg;
+ 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_VOID)
{
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_item_t * item, int num_args, oberon_expr_t * list_args)
+{
+ oberon_type_t * signature = item -> result;
+ if(signature -> class != OBERON_TYPE_PROCEDURE)
+ {
+ oberon_error(ctx, "not a procedure");
+ }
+
+ oberon_expr_t * call;
+
+ if(signature -> sysproc)
+ {
+ if(signature -> genproc == NULL)
+ {
+ oberon_error(ctx, "not a procedure");
+ }
+
+ signature -> genproc(ctx, num_args, list_args);
+ }
+ else
+ {
+ if(signature -> base -> class != OBERON_TYPE_VOID)
+ {
+ oberon_error(ctx, "attempt to call function as non-typed procedure");
+ }
+
+ 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, (oberon_item_t *) call);
+ oberon_generate_call_proc(ctx, call);
+ }
+}
+
+/*
static void
oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_args, oberon_expr_t * list_args)
{
@@ -1034,20 +1145,25 @@ oberon_make_call_proc(oberon_context_t * ctx, oberon_object_t * proc, int num_ar
oberon_generate_call_proc(ctx, call);
}
}
+*/
#define ISEXPR(x) \
(((x) == PLUS) \
|| ((x) == MINUS) \
|| ((x) == IDENT) \
|| ((x) == INTEGER) \
+ || ((x) == REAL) \
+ || ((x) == CHAR) \
+ || ((x) == NIL) \
|| ((x) == LPAREN) \
|| ((x) == NOT) \
|| ((x) == TRUE) \
- || ((x) == FALSE))
+ || ((x) == FALSE))
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");
oberon_expr_t * selector;
selector = oberon_new_item(MODE_DEREF, expr -> result -> base, expr -> read_only);
- selector -> item.parent = expr;
+ selector -> item.parent = (oberon_item_t *) expr;
return selector;
}
@@ -1104,7 +1220,7 @@ oberon_make_array_selector(oberon_context_t * ctx, oberon_expr_t * desig, oberon
oberon_expr_t * selector;
selector = oberon_new_item(MODE_INDEX, base, desig -> read_only);
- selector -> item.parent = desig;
+ selector -> item.parent = (oberon_item_t *) desig;
selector -> item.num_args = 1;
selector -> item.args = index;
@@ -1119,7 +1235,7 @@ 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)
{
@@ -1151,7 +1267,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
oberon_expr_t * selector;
selector = oberon_new_item(MODE_FIELD, field -> type, read_only);
selector -> item.var = field;
- selector -> item.parent = expr;
+ selector -> item.parent = (oberon_item_t *) expr;
return selector;
}
@@ -1159,7 +1275,8 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
#define ISSELECTOR(x) \
(((x) == LBRACE) \
|| ((x) == DOT) \
- || ((x) == UPARROW))
+ || ((x) == UPARROW) \
+ || ((x) == LPAREN))
static oberon_object_t *
oberon_qualident(oberon_context_t * ctx, char ** xname, int check)
}
expr -> item.var = var;
- while(ISSELECTOR(ctx -> token))
+ while(expr -> result -> class != OBERON_TYPE_PROCEDURE && ISSELECTOR(ctx -> token))
{
switch(ctx -> token)
{
oberon_assert_token(ctx, UPARROW);
expr = oberno_make_dereferencing(ctx, expr);
break;
+ case LPAREN:
+ oberon_assert_token(ctx, LPAREN);
+ oberon_object_t * objtype = oberon_qualident(ctx, NULL, 1);
+ if(objtype -> class != OBERON_CLASS_TYPE)
+ {
+ oberon_error(ctx, "must be type");
+ }
+ oberon_assert_token(ctx, RPAREN);
+ expr = oberno_make_record_cast(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_type_t *
expr -> item.integer = ctx -> integer;
oberon_assert_token(ctx, INTEGER);
break;
+ case CHAR:
+ result = ctx -> char_type;
+ expr = oberon_new_item(MODE_CHAR, result, 1);
+ expr -> item.integer = ctx -> integer;
+ oberon_assert_token(ctx, CHAR);
+ break;
case REAL:
result = (ctx -> longmode) ? (ctx -> longreal_type) : (ctx -> real_type);
expr = oberon_new_item(MODE_REAL, result, 1);
}
#define ISRELATION(x) \
- ((x) >= EQUAL && (x) <= GEQ)
+ ((x) >= EQUAL && (x) <= IS)
static oberon_expr_t *
oberon_expr(oberon_context_t * ctx)
oberon_error(ctx, "base must be type");
}
- if(typeobj -> type -> class != OBERON_TYPE_RECORD)
+ 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 = typeobj -> type;
- ctx -> decl = rec -> base -> scope;
+ rec -> base = base;
+ ctx -> decl = base -> scope;
oberon_assert_token(ctx, RPAREN);
}
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);
}
static void
@@ -2838,10 +2980,10 @@ oberon_new_intrinsic(oberon_context_t * ctx, char * name, GenerateFuncCallback f
{
oberon_object_t * proc;
proc = oberon_define_object(ctx -> decl, name, OBERON_CLASS_PROC, true, false, false);
- proc -> sysproc = 1;
- proc -> genfunc = f;
- proc -> genproc = p;
proc -> type = oberon_new_type_ptr(OBERON_TYPE_PROCEDURE);
+ proc -> type -> sysproc = true;
+ proc -> type -> genfunc = f;
+ proc -> type -> genproc = p;
}
static oberon_expr_t *