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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-11-09 21:49:52 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-11-11 04:00:58 +0000 |
| commit | d3fe767c16e7c528e4fc71c8a68ac14b4573d880 (patch) | |
| tree | 6e2c1d83054da0462c94e21ff347c3ebf813003b | |
| parent | 21de01f5554fa037f59b27525d2eb7342f5649c7 (diff) | |
| download | gcc-d3fe767c16e7c528e4fc71c8a68ac14b4573d880.zip gcc-d3fe767c16e7c528e4fc71c8a68ac14b4573d880.tar.gz gcc-d3fe767c16e7c528e4fc71c8a68ac14b4573d880.tar.bz2 | |
c-family: Support #pragma region/endregion [PR85487]
These pragmas are used by some editors to mark regions of code for
grouping and folding. GCC should silently ignore them, rather than
giving -Wunknown-pragmas warnings.
PR c/85487
gcc/ChangeLog:
* doc/cpp/pragmas.rst (Pragmas): Document region pragmas.
gcc/c-family/ChangeLog:
* c-pragma.cc (handle_pragma_ignore): New function.
(init_pragma): Register region and endregion pragmas.
gcc/testsuite/ChangeLog:
* c-c++-common/pragma-region.c: New test.
| -rw-r--r-- | gcc/c-family/c-pragma.cc | 9 | ||||
| -rw-r--r-- | gcc/doc/cpp/pragmas.rst | 3 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/pragma-region.c | 11 |
3 files changed, 23 insertions, 0 deletions
diff --git a/gcc/c-family/c-pragma.cc b/gcc/c-family/c-pragma.cc index b5a4b3c..142a464 100644 --- a/gcc/c-family/c-pragma.cc +++ b/gcc/c-family/c-pragma.cc @@ -1403,6 +1403,12 @@ handle_pragma_message (cpp_reader *) TREE_STRING_POINTER (message)); } +/* Ignore a no-op pragma that GCC recognizes, but which has no effect. */ +static void +handle_pragma_ignore (cpp_reader *) +{ +} + /* Mark whether the current location is valid for a STDC pragma. */ static bool valid_location_for_stdc_pragma; @@ -1870,6 +1876,9 @@ init_pragma (void) c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options); c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options); + c_register_pragma (0, "region", handle_pragma_ignore); + c_register_pragma (0, "endregion", handle_pragma_ignore); + c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64", handle_pragma_float_const_decimal64); diff --git a/gcc/doc/cpp/pragmas.rst b/gcc/doc/cpp/pragmas.rst index da07ceb..78277d7 100644 --- a/gcc/doc/cpp/pragmas.rst +++ b/gcc/doc/cpp/pragmas.rst @@ -119,3 +119,6 @@ GCC plugins may provide their own pragmas. file will never be read again, no matter what. It is a less-portable alternative to using :samp:`#ifndef` to guard the contents of header files against multiple inclusions. + +``#pragma region {tokens}...``, ``#pragma endregion {tokens}...`` + These pragmas are accepted, but have no effect. diff --git a/gcc/testsuite/c-c++-common/pragma-region.c b/gcc/testsuite/c-c++-common/pragma-region.c new file mode 100644 index 0000000..8e0cbe1 --- /dev/null +++ b/gcc/testsuite/c-c++-common/pragma-region.c @@ -0,0 +1,11 @@ +/* { dg-options "-Wunknown-pragmas" } */ +/* { dg-final { scan-assembler "code_within_region" } } */ +/* { dg-final { scan-assembler "code_within_named_region" } } */ + +#pragma region +void code_within_region() { } +#pragma endregion + +#pragma region ignored name +void code_within_named_region() { } +#pragma endregion // ignored comment |