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-rw-r--r--internal/string.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal/string.h b/internal/string.h
index 8fb9553d03..46862d77f5 100644
--- a/internal/string.h
+++ b/internal/string.h
@@ -43,6 +43,7 @@ char *rb_str_to_cstr(VALUE str);
const char *ruby_escaped_char(int c);
void rb_str_make_independent(VALUE str);
int rb_enc_str_coderange_scan(VALUE str, rb_encoding *enc);
+int rb_ascii8bit_appendable_encoding_index(rb_encoding *enc, unsigned int code);
static inline bool STR_EMBED_P(VALUE str);
static inline bool STR_SHARED_P(VALUE str);