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-rw-r--r--gdb/value.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/gdb/value.h b/gdb/value.h
index 5676d24..0bc5130 100644
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -1169,4 +1169,12 @@ extern struct type *result_type_of_xmethod (struct value *method,
extern struct value *call_xmethod (struct value *method,
int argc, struct value **argv);
+/* Given a discriminated union type and some corresponding value
+ contents, this will return the field index of the currently active
+ variant. This will throw an exception if no active variant can be
+ found. */
+
+extern int value_union_variant (struct type *union_type,
+ const gdb_byte *contents);
+
#endif /* !defined (VALUE_H) */