[cup] Add support for builtin functions, add `print()`

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler/parser.cup b/compiler/parser.cup
index 914c4e6..40df5a3 100644
--- a/compiler/parser.cup
+++ b/compiler/parser.cup
@@ -54,6 +54,7 @@ fn find_function_definition(token: Token*): Node* {
 fn identifier_exists(token: Token*): int {
     if (find_local_variable(token)) return true;
     if (find_function_definition(token)) return true;
+    if (find_builtin_function(token)) return true;
     return false;
 }
 
@@ -160,6 +161,11 @@ fn parse_identifier(lexer: Lexer*): Node* {
         return parse_function_call_args(lexer, func);
     }
 
+    func = find_builtin_function(&token);
+    if (func != null) {
+        return parse_function_call_args(lexer, func);
+    }
+
     die_loc2(&token.loc, "Unknown identifier in parse_identifier: ", token.value.as_string);
 }
 
@@ -642,6 +648,8 @@ fn parse_function(lexer: Lexer*): Node* {
 }
 
 fn parse_program(lexer: Lexer*): Node* {
+    initialize_builtins();
+
     let node = node_new(AST_PROGRAM);
     node.d.block.children = vector_new();