New syntax that's easier to parse, parsing doesn't need variable lookup

ast.h

@@ -0,0 +1,106 @@
+typedef struct Decl_Enum_Child Decl_Enum_Child;
+typedef struct Typespec Typespec;
+typedef struct Decl Decl;
+typedef struct Note Note;
+
+//-----------------------------------------------------------------------------
+// Type specifier
+//-----------------------------------------------------------------------------
+typedef enum Typespec_Kind{
+  TS_None,
+  TS_Name,
+  TS_Pointer,
+  TS_Array,
+  TS_Function,
+  TS_Struct,
+}Typespec_Kind;
+
+struct Typespec{
+  Typespec_Kind kind;
+  Typespec *next;
+  Token *pos;
+  union{
+    Intern_String name;
+    Decl *struct_spec;
+    struct{
+      Typespec *first;
+      Typespec *last;
+      Typespec *ret;
+    }function_spec;
+    struct{
+      Typespec *base;
+      Expr *size;
+    }array_spec;
+    Typespec *base;
+  };
+};
+
+//-----------------------------------------------------------------------------
+// Notes
+//-----------------------------------------------------------------------------
+struct Note{
+  Token *pos;
+  Intern_String name;
+  Expr *expr;
+  
+  Note *next;
+  Note *first;
+  Note *last;
+};
+
+//-----------------------------------------------------------------------------
+// Declarations
+//-----------------------------------------------------------------------------
+typedef enum Decl_Kind{
+  DECL_None,
+  DECL_Struct,
+  DECL_Union,
+  DECL_Enum,
+  DECL_Variable,
+  DECL_Typedef,
+  DECL_List,
+}Decl_Kind;
+
+struct Decl_Enum_Child{
+  Decl_Enum_Child *next;
+  Intern_String name;
+  Token *pos;
+  Expr *expr;
+  
+  Note *first_note;
+  Note *last_note;
+};
+
+struct Decl{
+  Decl_Kind kind;
+  Intern_String name;
+  Token *pos;
+  Decl *next;
+  
+  Note *first_note;
+  Note *last_note;
+  
+  union{
+    struct{
+      Decl_Enum_Child *first;
+      Decl_Enum_Child *last;
+      Typespec *typespec;
+    }enum_decl;
+    struct{
+      Decl *first;
+      Decl *last;
+    } struct_decl;
+    struct{
+      Typespec *type;
+      Expr *expr;
+    }variable_decl;
+    struct{
+      Typespec *type;
+    }typedef_decl;
+    struct{
+      Decl *first;
+      Decl *last;
+    }list;
+  };
+};
+