Start handling minimal semantic information, needed for types.

This adds a layer of symbol information on top of the raw tokens.

1 files changed, 33 insertions, 0 deletions

diff --git a/symbol.c b/symbol.c
new file mode 100644
index 00000000..ed09a167
--- /dev/null
+++ b/symbol.c
@@ -0,0 +1,33 @@
+#include <stdlib.h>
+#include "token.h"
+#include "symbol.h"
+
+struct symbol *alloc_symbol(struct token *token, int type)
+{
+	struct symbol *sym = malloc(sizeof(struct symbol));
+	struct ident *ident;
+
+	if (token->type != TOKEN_IDENT)
+		die("Internal error: trying to make a symbol out of a non-identifier");
+	ident = token->ident;
+	if (!sym)
+		die("out of memory for symbol information");
+	sym->token = token;
+	sym->next = ident->symbol;
+	sym->type = type;
+	ident->symbol = sym;
+	return sym;
+}
+
+struct symbol *create_symbol(int stream, const char *name, int type)
+{
+	return alloc_symbol(built_in_token(stream, name), type);
+}
+
+void init_symbols(void)
+{
+	int stream = init_stream("builtin");
+	struct symbol *sym;
+
+	sym = create_symbol(stream, "int", SYM_TYPEDEF);
+}