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+#ifndef INTERNAL_COMPILE_H /*-*-C-*-vi:se ft=c:*/
+#define INTERNAL_COMPILE_H
+/**
+ * @author Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright This file is a part of the programming language Ruby.
+ * Permission is hereby granted, to either redistribute and/or
+ * modify this file, provided that the conditions mentioned in the
+ * file COPYING are met. Consult the file for details.
+ * @brief Internal header for the compiler.
+ */
+#include "ruby/internal/config.h"
+#include <stddef.h> /* for size_t */
+#include "ruby/ruby.h" /* for rb_event_flag_t */
+
+struct rb_iseq_struct; /* in vm_core.h */
+
+/* compile.c */
+int rb_dvar_defined(ID, const struct rb_iseq_struct *);
+int rb_local_defined(ID, const struct rb_iseq_struct *);
+int rb_insn_len(VALUE insn);
+const char *rb_insns_name(int i);
+VALUE rb_insns_name_array(void);
+int rb_iseq_cdhash_cmp(VALUE val, VALUE lit);
+st_index_t rb_iseq_cdhash_hash(VALUE a);
+
+/* iseq.c */
+int rb_vm_insn_addr2insn(const void *);
+int rb_vm_insn_decode(const VALUE encoded);
+extern bool ruby_vm_keep_script_lines;
+
+/* iseq.c (export) */
+rb_event_flag_t rb_iseq_event_flags(const struct rb_iseq_struct *iseq, size_t pos);
+
+#endif /* INTERNAL_COMPILE_H */