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-rw-r--r--libcpp/ChangeLog6
-rw-r--r--libcpp/macro.cc7
2 files changed, 11 insertions, 2 deletions
diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index b5188fd..e58fad1 100644
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,9 @@
+2025-08-04 Jakub Jelinek <jakub@redhat.com>
+
+ PR preprocessor/120778
+ * macro.cc (stringify_arg): For C++26 emit a pedarn instead of warning
+ for \ at the end of stringification.
+
2025-08-03 Jakub Jelinek <jakub@redhat.com>
PR c++/120845
diff --git a/libcpp/macro.cc b/libcpp/macro.cc
index be25710..158c821 100644
--- a/libcpp/macro.cc
+++ b/libcpp/macro.cc
@@ -1003,7 +1003,10 @@ stringify_arg (cpp_reader *pfile, const cpp_token **first, unsigned int count)
/* Ignore the final \ of invalid string literals. */
if (backslash_count & 1)
{
- cpp_error (pfile, CPP_DL_WARNING,
+ cpp_error (pfile,
+ CPP_OPTION (pfile, cplusplus)
+ && CPP_OPTION (pfile, lang) >= CLK_GNUCXX26
+ ? CPP_DL_PEDWARN : CPP_DL_WARNING,
"invalid string literal, ignoring final %<\\%>");
dest--;
}
@@ -1068,7 +1071,7 @@ paste_tokens (cpp_reader *pfile, location_t location,
/* Mandatory error for all apart from assembler. */
if (CPP_OPTION (pfile, lang) != CLK_ASM)
cpp_error_with_line (pfile, CPP_DL_ERROR, location, 0,
- "pasting \"%.*s\" and \"%.*s\" does not give "
+ "pasting %<%.*s%> and %<%.*s%> does not give "
"a valid preprocessing token",
(int) (lhsend - buf), buf,
(int) (end - rhsstart), rhsstart);