llvm-project/clang/test/Lexer/bcpl-escaped-newline.c

// RUN: %clang_cc1 -Eonly -ftrigraphs %s
// RUN: %clang_cc1 -Eonly -verify %s

//\
#error bar

//??/
#error qux
// expected-error@-1 {{qux}}

// Trailing whitespace!
//\ 
#error quux
// expected-warning@-2 {{backslash and newline separated by space}}
Add driver flags -ftrigraphs, -fno-trigraphs. -trigraphs is now an alias for -ftrigraphs. -fno-trigraphs makes it possible to explicitly disable trigraphs, which couldn't be done before. clang -std=c++11 -fno-trigraphs now builds without GNU extensions, but with trigraphs disabled. Previously, trigraphs were only disabled in GNU modes or with -std=c++1z. Make the new -f flags the cc1 interface too. This requires changing -trigraphs to -ftrigraphs in a few cc1 tests. Related to PR21974. llvm-svn: 224790 2014-12-24 06:32:37 +08:00			`// RUN: %clang_cc1 -Eonly -ftrigraphs %s`
Speed up BCPL comment lexing by looking aggressively for newlines and then scannig backwards to see if the newline is escaped. 3% speedup in preprocessing all of clang with -Eonly. Also includes a small testcase for coverage. llvm-svn: 139116 2011-09-05 15:19:39 +08:00			`// RUN: %clang_cc1 -Eonly -verify %s`

			`//\`
			`#error bar`

			`//??/`
Allow -verify directives to be filtered by preprocessing. This is accomplished by making VerifyDiagnosticsConsumer a CommentHandler, which then only reads the -verify directives that are actually in live blocks of code. It also makes it simpler to handle -verify directives that appear in header files, though we still have to manually reparse some files depending on how they are generated. This requires some test changes. In particular, all PCH tests now have their -verify directives outside the "header" portion of the file, using the @line syntax added in r159978. Other tests have been modified mostly to make it clear what is being tested, and to prevent polluting the expected output with the directives themselves. Patch by Andy Gibbs! (with slight modifications) The new Frontend/verify-* tests exercise the functionality of this commit, as well as r159978, r159979, and r160053 (Andy's other -verify enhancements). llvm-svn: 160068 2012-07-12 03:58:23 +08:00			`#error qux`
			`// expected-error@-1 {{qux}}`
Speed up BCPL comment lexing by looking aggressively for newlines and then scannig backwards to see if the newline is escaped. 3% speedup in preprocessing all of clang with -Eonly. Also includes a small testcase for coverage. llvm-svn: 139116 2011-09-05 15:19:39 +08:00
			`// Trailing whitespace!`
			`//\`
			`#error quux`
Lexer: Issue -Wbackslash-newline-escape for line comments The warning for backslash and newline separated by whitespace was missed in this code path. backslash<whitespace><newline> is handled differently from compiler to compiler so it's important to warn consistently where there's ambiguity. Matches similar handling of block comments and non-comment lines. llvm-svn: 197331 2013-12-15 07:32:31 +08:00			`// expected-warning@-2 {{backslash and newline separated by space}}`