1 files changed, 37 insertions, 0 deletions
diff --git a/symbol.h b/symbol.h
new file mode 100644
index 00000000..cb3de36e
--- /dev/null
+++ b/symbol.h
@@ -0,0 +1,37 @@
+#ifndef SEMANTIC_H
+#define SEMANTIC_H
+
+#include "token.h"
+
+/*
+ * An identifier with semantic meaning is a "symbol".
+ *
+ * There's a 1:n relationship: each symbol is always
+ * associated with one identifier, while each identifier
+ * can have one or more semantic meanings due to C scope
+ * rules.
+ *
+ * The progression is symbol -> token -> identifier. The
+ * token contains the information on where the symbol was
+ * declared.
+ */
+struct symbol {
+	struct token *token;		/* Where this symbol was declared */
+	struct symbol *next;		/* Next semantic symbol that shares this identifier */
+	int type;
+};
+
+enum symbol_types {
+	SYM_NONE = 0,			/* regular variable */
+	SYM_MEMBER,			/* structure member */
+	SYM_TYPEDEF,			/* typedef */
+	SYM_SPECIFIER,			/* specifier */
+	SYM_QUALIFIER,			/* type qualifier */
+};
+
+#define symbol_is_typename(sym) ((sym)->type >= SYM_TYPEDEF)
+
+void init_symbols(void);
+
+#endif /* SEMANTIC_H */
+