Initial implementation of printing the AST as a JSON string. This...

src/codegen.cc

Index: src/codegen.cc
===================================================================
--- src/codegen.cc	(revision 3048)
+++ src/codegen.cc	(working copy)
@@ -140,15 +140,18 @@
 #ifdef DEBUG
   bool print_source = false;
   bool print_ast = false;
+  bool print_json_ast = false;
   const char* ftype;
 
   if (Bootstrapper::IsActive()) {
     print_source = FLAG_print_builtin_source;
     print_ast = FLAG_print_builtin_ast;
+    print_json_ast = FLAG_print_builtin_json_ast;
     ftype = "builtin";
   } else {
     print_source = FLAG_print_source;
     print_ast = FLAG_print_ast;
+    print_json_ast = FLAG_print_json_ast;
     ftype = "user-defined";
   }
 
@@ -165,6 +168,11 @@
   if (print_ast) {
     PrintF("--- AST ---\n%s\n", AstPrinter().PrintProgram(flit));
   }
+
+  if (print_json_ast) {
+    JsonAstBuilder builder;
+    PrintF("%s", builder.BuildProgram(flit));
+  }
 #endif  // DEBUG
 
   // Generate code.