Parsing expressions

new_ast.c

@@ -40,6 +40,7 @@ typedef enum Expr_Kind{
   EK_None,
   EK_Int,
   EK_String,
+  EK_Identifier,
   EK_Unary, 
   EK_Binary, 
   EK_Ternary,
@@ -126,6 +127,14 @@ expr_str(Arena *p, Token *token){
   return expr;
 }
 
+function Expr *
+expr_name(Arena *p, Token *token){
+  assert(token->kind == TK_Identifier);
+  Expr *expr = expr_new(p, EK_Identifier, token);
+  expr->intern_val = token->intern_val;
+  return expr;
+}
+
 function Expr *
 expr_unary(Arena *p, Token *op, Expr *exp){
   Expr *expr = expr_new(p, EK_Unary, op);