2cb2cd242c
C89 allowed a type specifier to be elided with the resulting type being int, aka implicit int behavior. This feature was subsequently removed in C99 without a deprecation period, so implementations continued to support the feature. Now, as with implicit function declarations, is a good time to reevaluate the need for this support. This patch allows -Wimplicit-int to issue warnings in C89 mode (off by default), defaults the warning to an error in C99 through C17, and disables support for the feature entirely in C2x. It also removes a warning about missing declaration specifiers that really was just an implicit int warning in disguise and other minor related cleanups.
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
// RUN: %clang_cc1 -verify -fms-extensions -Wmicrosoft %s
|
|
// RUN: not %clang_cc1 -P -E -fms-extensions %s | FileCheck -strict-whitespace %s
|
|
|
|
// This horrible stuff should preprocess into (other than whitespace):
|
|
// int foo;
|
|
// int bar;
|
|
// int baz;
|
|
|
|
int foo;
|
|
|
|
// CHECK: int foo;
|
|
|
|
#define comment /##/ dead tokens live here
|
|
// expected-warning@+1 {{pasting two '/' tokens}}
|
|
comment This is stupidity
|
|
|
|
int bar;
|
|
|
|
// CHECK: int bar;
|
|
|
|
#define nested(x) int x comment cute little dead tokens...
|
|
|
|
// expected-warning@+1 {{pasting two '/' tokens}}
|
|
nested(baz) rise of the dead tokens
|
|
|
|
;
|
|
|
|
// CHECK: int baz
|
|
// CHECK: ;
|
|
|
|
|
|
// rdar://8197149 - VC++ allows invalid token pastes: (##baz
|
|
#define foo(x) abc(x)
|
|
#define bar(y) foo(##baz(y))
|
|
bar(q) // expected-error {{type specifier missing}} expected-error {{invalid preprocessing token}} expected-error {{parameter list without types}}
|
|
|
|
// CHECK: abc(baz(q))
|
|
|
|
|
|
#define str(x) #x
|
|
#define collapse_spaces(a, b, c, d) str(a ## - ## b ## - ## c ## d)
|
|
collapse_spaces(1a, b2, 3c, d4) // expected-error 4 {{invalid preprocessing token}} expected-error {{expected function body}}
|
|
|
|
// CHECK: "1a-b2-3cd4"
|