// Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
// is specified, or -std is set to a conforming mode.
- Opts.Trigraphs = !Opts.GNUMode;
+ // Trigraphs are disabled by default in c++1z onwards.
+ Opts.Trigraphs = !Opts.GNUMode && !Opts.CPlusPlus1z;
Opts.DollarIdents = !Opts.AsmPreprocessor;
--- /dev/null
+// RUN: %clang_cc1 -std=c++1z %s -verify
+// RUN: %clang_cc1 -std=c++1z %s -trigraphs -fsyntax-only
+
+??= define foo ; // expected-error {{}} expected-warning {{trigraph ignored}}
+
+static_assert("??="[0] == '#', ""); // expected-error {{failed}} expected-warning {{trigraph ignored}}
+
+// ??/
+error here; // expected-error {{}}