Emitting proper lines and files, coding in the language!

ccodegen.cpp

@@ -13,10 +13,16 @@ gen_indent(){
   for(S32 i = 0; i < global_indent; i++) gen("  ");
 }
 
+global Intern_String last_filename;
 function void
 gen_line(Ast *node){
-  if(emit_line_directives)
+  if(emit_line_directives){
     genln("#line %d", node->pos->line+1);
+    if(node->pos->file != last_filename){
+      last_filename = node->pos->file;
+      gen(" \"%s\"", last_filename.str);
+    }
+  }
 }
 
 function String
@@ -415,6 +421,8 @@ gen_ast(Ast *ast){
     }
 
     CASE(LAMBDA, Decl){
+      gen_line(node);
+      genln("");
       if(is_flag_set(node->expr->flags, AST_FOREIGN)){
         gen("/*foreign*/");
       }
@@ -662,11 +670,6 @@ typedef S32     Bool;
 #define true 1
 #define false 0
 
-typedef struct Slice{
-  S64 len;
-  void *data;
-}Slice;
-
 typedef struct String{
   U8 *str;
   S64 len;