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added pointer types resolution, type validity checks and void type

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This commit is contained in:
Lorenzo Torres 2025-12-05 16:45:03 +01:00
parent 8f19852746
commit 3ca2c2f009
5 changed files with 51 additions and 14 deletions
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31
sema.c
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@ -129,6 +129,24 @@ static type *get_type(sema *s, ast_node *n)
t = shget(type_reg, name);
free(name);
return t;
case NODE_PTR_TYPE:
t = malloc(sizeof(type));
t->size = sizeof(usize);
t->alignment = sizeof(usize);
if (n->expr.ptr_type.flags & PTR_RAW) {
t->name = "ptr";
t->tag = TYPE_PTR;
t->data.ptr.child = get_type(s, n->expr.ptr_type.type);
t->data.ptr.is_const = (n->expr.ptr_type.flags & PTR_CONST) != 0;
t->data.ptr.is_volatile = (n->expr.ptr_type.flags & PTR_VOLATILE) != 0;
} else {
t->name = "slice";
t->tag = TYPE_SLICE;
t->data.slice.child = get_type(s, n->expr.ptr_type.type);
t->data.slice.is_const = (n->expr.ptr_type.flags & PTR_CONST) != 0;
t->data.slice.is_volatile = (n->expr.ptr_type.flags & PTR_VOLATILE) != 0;
}
return t;
default:
error(n, "expected type.");
return NULL;
@ -145,6 +163,16 @@ static void register_struct(sema *s, char *name, type *t)
while (m) {
m_type = get_type(s, m->type);
if (!m_type) {
error(m->type, "unknown type.");
return;
}
if (m_type->size == 0) {
error(m->type, "a struct member can't be of type `void`.");
return;
}
if (alignment < m_type->alignment) {
alignment = m_type->alignment;
}
@ -165,6 +193,8 @@ static void register_struct(sema *s, char *name, type *t)
}
t->size = offset;
printf("%ld\n", t->size);
}
static void register_union(sema *s, char *name, type *t)
@ -276,6 +306,7 @@ sema *sema_init(parser *p, arena *a)
types = NULL;
s->ast = p->ast;
register_type(s, "void", create_integer(s, "void", 0, false));
register_type(s, "u8", create_integer(s, "u8", 8, false));
register_type(s, "u16", create_integer(s, "u16", 16, false));
register_type(s, "u32", create_integer(s, "u32", 32, false));