-> Operator has very low precedence, size_of, align_of, length_of expressions

ast.cpp

@@ -20,6 +20,10 @@ enum Ast_Kind: U32{
   AST_CALL_ITEM,
   AST_CALL,
 
+  AST_SIZE_OF,
+  AST_LENGTH_OF,
+  AST_ALIGN_OF,
+
   AST_COMPOUND,
   AST_TYPE,
   AST_VAR,
@@ -56,7 +60,7 @@ enum{
 };
 
 struct Ast{
-  U64 id;
+  U64 di; // Debug id, shouldn't ever be used in the program
   Token *pos;
 
   Ast_Kind kind;
@@ -119,13 +123,12 @@ struct Ast_Binary: Ast_Expr{
   Token_Kind op;
   Ast_Expr *left;
   Ast_Expr *right;
-
-  // Ast_Type *type; // For casts after_type
   Ast_Type *before_type;
 };
 
-struct Ast_Len: Ast_Expr{
+struct Ast_Builtin: Ast_Expr{
   Ast_Expr *expr;
+  U64 padding[3]; // For folding constants into atoms
 };
 
 // Problem: We are parsing out of order, in the middle of parsing a function
@@ -236,7 +239,7 @@ struct Ast_Decl: Ast{
   result->kind    = AST_##ikind;                                       \
   result->parent_scope = pctx->currently_parsed_scope;                 \
   result->pos     = ipos;                                              \
-  result->id      = ++pctx->unique_ids
+  result->di      = ++pctx->unique_ids
 
 function Ast_Atom *
 ast_str(Token *pos, Intern_String string){
@@ -513,6 +516,27 @@ ast_module(Intern_String filename){
   return result;
 }
 
+function Ast_Builtin *
+ast_sizeof(Token *pos, Ast_Expr *expr){
+  AST_NEW(Builtin, SIZE_OF, pos, AST_EXPR);
+  result->expr = expr;
+  return result;
+}
+
+function Ast_Builtin *
+ast_len(Token *pos, Ast_Expr *expr){
+  AST_NEW(Builtin, LENGTH_OF, pos, AST_EXPR);
+  result->expr = expr;
+  return result;
+}
+
+function Ast_Builtin *
+ast_alignof(Token *pos, Ast_Expr *expr){
+  AST_NEW(Builtin, ALIGN_OF, pos, AST_EXPR);
+  result->expr = expr;
+  return result;
+}
+
 //-----------------------------------------------------------------------------
 // Value
 //-----------------------------------------------------------------------------