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llvm-project/clang/test/Lexer/unicode.c

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Add test that we correctly allow some non-letter unicode characters in identifiers, and extend existing test to also cover C++. llvm-svn: 248079
2015-09-19 10:14:12 +08:00
// RUN: %clang_cc1 -fsyntax-only -verify -x c -std=c11 %s
// RUN: %clang_cc1 -fsyntax-only -verify -x c++ -std=c++11 %s
Don't warn about Unicode characters in -E mode. People use the C preprocessor for things other than C files. Some of them have Unicode characters. We shouldn't warn about Unicode characters appearing outside of identifiers in this case. There's not currently a way for the preprocessor to tell if it's in -E mode, so I added a new flag, derived from the PreprocessorOutputOptions. This is only used by the Unicode warnings for now, but could conceivably be used by other warnings or even behavioral differences later. <rdar://problem/13107323> llvm-svn: 173881
2013-01-30 09:52:57 +08:00
// RUN: %clang_cc1 -E -DPP_ONLY=1 %s -o %t
// RUN: FileCheck --strict-whitespace --input-file=%t %s
As an extension, treat Unicode whitespace characters as whitespace. llvm-svn: 173370
2013-01-25 04:50:50 +08:00
// This file contains Unicode characters; please do not "fix" them!
extern int x; // expected-warning {{treating Unicode character as whitespace}}
extern int　x; // expected-warning {{treating Unicode character as whitespace}}
Don't warn about Unicode characters in -E mode. People use the C preprocessor for things other than C files. Some of them have Unicode characters. We shouldn't warn about Unicode characters appearing outside of identifiers in this case. There's not currently a way for the preprocessor to tell if it's in -E mode, so I added a new flag, derived from the PreprocessorOutputOptions. This is only used by the Unicode warnings for now, but could conceivably be used by other warnings or even behavioral differences later. <rdar://problem/13107323> llvm-svn: 173881
2013-01-30 09:52:57 +08:00
// CHECK: extern int {{x}}
// CHECK: extern int　{{x}}
Lexer: Don't warn about Unicode in preprocessor directives. This allows people to use Unicode in their #pragma mark and in macros that exist only to be string-ized. <rdar://problem/13107323&13121362> llvm-svn: 174081
2013-02-01 03:48:48 +08:00
#pragma mark ¡Unicode!
#define COPYRIGHT Copyright © 2012
#define XSTR(X) #X
#define STR(X) XSTR(X)
static const char *copyright = STR(COPYRIGHT); // no-warning
// CHECK: static const char *copyright = "Copyright © {{2012}}";
Don't warn about Unicode characters in -E mode. People use the C preprocessor for things other than C files. Some of them have Unicode characters. We shouldn't warn about Unicode characters appearing outside of identifiers in this case. There's not currently a way for the preprocessor to tell if it's in -E mode, so I added a new flag, derived from the PreprocessorOutputOptions. This is only used by the Unicode warnings for now, but could conceivably be used by other warnings or even behavioral differences later. <rdar://problem/13107323> llvm-svn: 173881
2013-01-30 09:52:57 +08:00
#if PP_ONLY
Lexer: Don't warn about Unicode in preprocessor directives. This allows people to use Unicode in their #pragma mark and in macros that exist only to be string-ized. <rdar://problem/13107323&13121362> llvm-svn: 174081
2013-02-01 03:48:48 +08:00
COPYRIGHT
// CHECK: Copyright © {{2012}}
Don't warn about Unicode characters in -E mode. People use the C preprocessor for things other than C files. Some of them have Unicode characters. We shouldn't warn about Unicode characters appearing outside of identifiers in this case. There's not currently a way for the preprocessor to tell if it's in -E mode, so I added a new flag, derived from the PreprocessorOutputOptions. This is only used by the Unicode warnings for now, but could conceivably be used by other warnings or even behavioral differences later. <rdar://problem/13107323> llvm-svn: 173881
2013-01-30 09:52:57 +08:00
CHECK: The preprocessor should not complain about Unicode characters like ©.
#endif
Add test that we correctly allow some non-letter unicode characters in identifiers, and extend existing test to also cover C++. llvm-svn: 248079
2015-09-19 10:14:12 +08:00
// A 🌹 by any other name....
extern int 🌹;
int 🌵(int 🌻) { return 🌻+ 1; }
int main () {
int 🌷 = 🌵(🌹);
return 🌷;
}
Warn if we find a Unicode homoglyph for a symbol in an identifier. Specifically, warn if: * we find a character that the language standard says we must treat as an identifier, and * that character is not reasonably an identifier character (it's a punctuation character or similar), and * it renders identically to a valid non-identifier character in common fixed-width fonts. Some tools "helpfully" substitute the surprising characters for the expected characters, and replacing semicolons with Greek question marks is a common "prank". llvm-svn: 320697
2017-12-14 21:15:08 +08:00
int n; = 3; // expected-warning {{treating Unicode character <U+037E> as identifier character rather than as ';' symbol}}
int *n꞉꞉v = &n;; // expected-warning 2{{treating Unicode character <U+A789> as identifier character rather than as ':' symbol}}
// expected-warning@-1 {{treating Unicode character <U+037E> as identifier character rather than as ';' symbol}}
int v＝［＝］（auto）｛return～x；｝（）; // expected-warning 12{{treating Unicode character}}
PR38870: Add warning for zero-width unicode characters appearing in identifiers. llvm-svn: 341700
2018-09-08 03:25:39 +08:00
int ⁠xx‍;
// expected-warning@-1 {{identifier contains Unicode character <U+2060> that is invisible in some environments}}
// expected-warning@-2 {{identifier contains Unicode character <U+FEFF> that is invisible in some environments}}
// expected-warning@-3 {{identifier contains Unicode character <U+200D> that is invisible in some environments}}
int foo​bar = 0; // expected-warning {{identifier contains Unicode character <U+200B> that is invisible in some environments}}
int x = foobar; // expected-error {{undeclared identifier}}
Don't emit "will be treated as an identifier character" warning for UTF-8 characters that aren't identifier characters in the current language mode. llvm-svn: 343040
2018-09-26 06:34:45 +08:00
int ∣foo; // expected-error {{non-ASCII character}}
#ifndef PP_ONLY
#define ∶ x // expected-error {{macro name must be an identifier}}
#endif