Introduce string_operation

This adds string_operation, which implements OP_STRING for most
languages (C has its own variant).

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* expop.h (class string_operation): New.
	* eval.c (eval_op_string): No longer static.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/eval.c b/gdb/eval.c
index 4601c92..e68a93d 100644
--- a/gdb/eval.c
+++ b/gdb/eval.c
@@ -1284,7 +1284,7 @@ eval_op_register (struct type *expect_type, struct expression *exp,
 
 /* Helper function that implements the body of OP_STRING.  */
 
-static struct value *
+struct value *
 eval_op_string (struct type *expect_type, struct expression *exp,
 		enum noside noside, int len, const char *string)
 {