C codegen

ast.h

@@ -1,7 +1,9 @@
 typedef struct Decl_Enum_Child Decl_Enum_Child;
+typedef struct Decl_Function_Arg Decl_Function_Arg;
 typedef struct Typespec Typespec;
 typedef struct Decl Decl;
 typedef struct Note Note;
+typedef struct Stmt Stmt;
 
 //-----------------------------------------------------------------------------
 // Type specifier
@@ -12,7 +14,6 @@ typedef enum Typespec_Kind{
   TS_Pointer,
   TS_Array,
   TS_Function,
-  TS_Struct,
 }Typespec_Kind;
 
 struct Typespec{
@@ -21,7 +22,6 @@ struct Typespec{
   Token *pos;
   union{
     Intern_String name;
-    Decl *struct_spec;
     struct{
       Typespec *first;
       Typespec *last;
@@ -58,9 +58,22 @@ typedef enum Decl_Kind{
   DECL_Enum,
   DECL_Variable,
   DECL_Typedef,
+  DECL_Function,
   DECL_List,
 }Decl_Kind;
 
+typedef enum Decl_Struct_Kind{
+  STRUCT_Base  ,
+  STRUCT_Nested,
+}Decl_Struct_Kind;
+
+struct Decl_Function_Arg{
+  Decl_Function_Arg *next;
+  Intern_String name;
+  Typespec *typespec;
+  Token *pos;
+};
+
 struct Decl_Enum_Child{
   Decl_Enum_Child *next;
   Intern_String name;
@@ -73,9 +86,10 @@ struct Decl_Enum_Child{
 
 struct Decl{
   Decl_Kind kind;
+  Decl *next;
+  
   Intern_String name;
   Token *pos;
-  Decl *next;
   
   Note *first_note;
   Note *last_note;
@@ -87,6 +101,7 @@ struct Decl{
       Typespec *typespec;
     }enum_decl;
     struct{
+      Decl_Struct_Kind kind;
       Decl *first;
       Decl *last;
     } struct_decl;
@@ -97,6 +112,11 @@ struct Decl{
     struct{
       Typespec *type;
     }typedef_decl;
+    struct{
+      Decl_Function_Arg *first;
+      Decl_Function_Arg *last ;
+      Typespec *ret;
+    }function_decl;
     struct{
       Decl *first;
       Decl *last;
@@ -104,3 +124,41 @@ struct Decl{
   };
 };
 
+//-----------------------------------------------------------------------------
+// Statements
+//-----------------------------------------------------------------------------
+typedef enum Stmt_Kind{
+  STMT_None,
+  STMT_Decl,
+  STMT_Expr,
+  STMT_Return,
+  STMT_If,
+  STMT_For,
+}Stmt_Kind;
+
+typedef struct Stmt_List Stmt_List;
+struct Stmt_List{
+  Stmt *first;
+  Stmt *last;
+};
+
+typedef struct Stmt_If Stmt_If;
+struct Stmt_If{
+  Stmt_If *next;
+  Expr *expr;
+  union{ 
+    struct{Stmt *first; Stmt *last;};
+    Stmt_List *list;
+  };
+};
+
+struct Stmt{
+  Stmt_Kind kind;
+  Stmt *next;
+  union{
+    Decl *decl;
+    Expr *expr;
+    Stmt_If *if_stmt;
+    Stmt_List *list;
+  };
+};