Replace parser & node compile_option from Hash to bit field

This commit reduces dependency to CRuby object.

1 files changed, 2 insertions, 1 deletions

diff --git a/rubyparser.h b/rubyparser.h
index c3e3d870e2..ab70176fc4 100644
--- a/rubyparser.h
+++ b/rubyparser.h
@@ -309,11 +309,12 @@ typedef struct node_buffer_struct node_buffer_t;
 /* T_IMEMO/ast */
 typedef struct rb_ast_body_struct {
     const NODE *root;
-    VALUE compile_option;
     VALUE script_lines;
     // script_lines is either:
     // - a Fixnum that represents the line count of the original source, or
     // - an Array that contains the lines of the original source
+    int frozen_string_literal:2; /* -1: not specified, 0: false, 1: true */
+    int coverage_enabled:2; /* -1: not specified, 0: false, 1: true */
 } rb_ast_body_t;
 typedef struct rb_ast_struct {
     VALUE flags;