0e5badd93b
For most cases where a conversion specifier doesn't match an argument, we usually guess that the conversion specifier is wrong. However, if the argument is an integer type and the specifier is %C, it's likely the user really did mean to print the integer as a character. (This is more common than %c because there is no way to specify a unichar literal -- you have to write an integer literal, such as '0x2603', and then cast it to unichar.) This does not change the behavior of %S, since there are fewer cases where printing a literal Unicode *string* is necessary, but this could easily be changed in the future. <rdar://problem/11982013> llvm-svn: 169400
31 lines
1.6 KiB
Plaintext
31 lines
1.6 KiB
Plaintext
// RUN: %clang_cc1 -fsyntax-only -fblocks -verify %s
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// RUN: %clang_cc1 -fdiagnostics-parseable-fixits -fblocks %s 2>&1 | FileCheck %s
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extern "C" void NSLog(id, ...);
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void test_percent_C() {
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const unsigned short data = 'a';
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NSLog(@"%C", data); // no-warning
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const wchar_t wchar_data = L'a';
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NSLog(@"%C", wchar_data); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'wchar_t'}}
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// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:16-[[@LINE-1]]:16}:"(unsigned short)"
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NSLog(@"%C", 0x2603); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'int'}}
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// CHECK-NOT: fix-it:"{{.*}}":{[[@LINE-1]]:11-[[@LINE-1]]:13}:"%d"
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// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:16-[[@LINE-2]]:16}:"(unsigned short)"
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typedef unsigned short unichar;
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NSLog(@"%C", wchar_data); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'wchar_t'}}
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// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:16-[[@LINE-1]]:16}:"(unichar)"
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NSLog(@"%C", 0x2603); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'int'}}
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// CHECK-NOT: fix-it:"{{.*}}":{[[@LINE-1]]:11-[[@LINE-1]]:13}:"%d"
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// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:16-[[@LINE-2]]:16}:"(unichar)"
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NSLog(@"%C", 0.0); // expected-warning{{format specifies type 'unichar' (aka 'unsigned short') but the argument has type 'double'}}
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// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:11-[[@LINE-1]]:13}:"%f"
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// CHECK-NOT: fix-it:"{{.*}}":{[[@LINE-2]]:16-[[@LINE-2]]:16}:"(unichar)"
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}
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