Parsing exprs, enum_decls, Introduce intern table, symbol table

decl.h

@@ -0,0 +1,63 @@
+#pragma once
+typedef struct Note Note;
+typedef struct Decl Decl;
+typedef struct Decl_Enum_Child Decl_Enum_Child;
+
+typedef enum Decl_Kind{
+  DK_None,
+  DK_Variable,
+  DK_Typedef,
+  DK_Struct,
+  DK_Union,
+  DK_Enum,
+  DK_Function,
+}Decl_Kind;
+
+struct Note{
+  Intern_String string;
+  Token *token;
+  Expr *expr;
+  
+  Note *next;
+  Note *first;
+  Note *last;
+};
+
+struct Decl_Enum_Child{
+  Decl_Enum_Child *next;
+  Token *token; // name
+  Expr *expr;
+};
+
+struct Decl{
+  Decl_Kind kind;
+  Decl *next;
+  Intern_String name;
+  Token *token;
+  
+  Note *first_note;
+  Note *last_note;
+  union{
+    struct{
+      Decl_Enum_Child *first;
+      Decl_Enum_Child *last;
+    } enum_val;
+    struct{
+      Decl *first;
+      Decl *last;
+    } aggregate_val;
+    struct{
+      Decl *first;
+      Decl *last;
+      Type *return_type;
+    }func_val;
+    struct{
+      Type *type;
+      Expr *expr;
+    }var_val;
+    struct{
+      Type *type;
+    }typedef_val;
+  };
+};
+