1// RUN: %clang_cc1 -Eonly -verify -pedantic %s
2// pasting ""x"" and ""+"" does not give a valid preprocessing token
3#define XYZ  x ## +
4XYZ   // expected-error {{pasting formed 'x+', an invalid preprocessing token}}
5#define XXYZ  . ## test
6XXYZ   // expected-error {{pasting formed '.test', an invalid preprocessing token}}
7
8// GCC PR 20077
9
10#define a   a ## ## // expected-error {{'##' cannot appear at end of macro expansion}}
11#define b() b ## ## // expected-error {{'##' cannot appear at end of macro expansion}}
12#define c   c ##    // expected-error {{'##' cannot appear at end of macro expansion}}
13#define d() d ##    // expected-error {{'##' cannot appear at end of macro expansion}}
14
15
16#define e   ## ## e // expected-error {{'##' cannot appear at start of macro expansion}}
17#define f() ## ## f // expected-error {{'##' cannot appear at start of macro expansion}}
18#define g   ## g    // expected-error {{'##' cannot appear at start of macro expansion}}
19#define h() ## h    // expected-error {{'##' cannot appear at start of macro expansion}}
20#define i   ##      // expected-error {{'##' cannot appear at start of macro expansion}}
21#define j() ##      // expected-error {{'##' cannot appear at start of macro expansion}}
22
23// Invalid token pasting.
24// PR3918
25
26// When pasting creates poisoned identifiers, we error.
27#pragma GCC poison BLARG
28BLARG  // expected-error {{attempt to use a poisoned identifier}}
29#define XX BL ## ARG
30XX     // expected-error {{attempt to use a poisoned identifier}}
31
32#define VA __VA_ ## ARGS__
33int VA;   // expected-warning {{__VA_ARGS__ can only appear in the expansion of a C99 variadic macro}}
34
35#define LOG_ON_ERROR(x) x ## #y; // expected-error {{'#' is not followed by a macro parameter}}
36LOG_ON_ERROR(0);
37