diff --git a/src/oberon.c b/src/oberon.c
index 570db39df1417efe4ffde397dc3f600ab2cc9e22..6cc5d1d193787867c68e74c0aec302d40a6022e0 100644 (file)
--- a/src/oberon.c
+++ b/src/oberon.c
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
// =======================================================================
* 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)
@@ -746,7 +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);
@@ -776,8 +823,19 @@ oberon_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * p
static oberon_expr_t *
oberno_make_record_cast(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * rec)
{
- if(expr -> result -> class != OBERON_TYPE_RECORD
- || rec -> class != OBERON_TYPE_RECORD)
+ 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");
}
@@ -813,39 +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)
@@ -859,24 +938,17 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
}
else if(pref -> class == OBERON_TYPE_RECORD)
{
- oberon_type_t * t = expr -> result;
- while(t != NULL && t != pref)
- {
- t = t -> base;
- }
- if(t == NULL)
- {
- printf("oberon_autocast_to: rec %p != %p\n", expr -> result, pref);
- oberon_error(ctx, "incompatible record types");
- }
- if(expr -> result != pref)
- {
- expr = oberno_make_record_cast(ctx, expr, pref);
- }
+ 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)
{
@@ -1080,14 +1152,18 @@ 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) == 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");
}
expr -> item.var = var;
- bool brk = false;
- while(brk == false && ISSELECTOR(ctx -> token))
+ while(expr -> result -> class != OBERON_TYPE_PROCEDURE && ISSELECTOR(ctx -> token))
{
switch(ctx -> token)
{
expr = oberno_make_dereferencing(ctx, expr);
break;
case LPAREN:
- if(expr -> result -> class == OBERON_TYPE_PROCEDURE)
- {
- brk = true;
- break;
- }
oberon_assert_token(ctx, LPAREN);
oberon_object_t * objtype = oberon_qualident(ctx, NULL, 1);
if(objtype -> class != OBERON_CLASS_TYPE)
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);
}
+ 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;
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);
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