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c: Implement C2Y N3298 - Introduce complex literals [PR117029]

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The following patch implements the C2Y N3298 paper Introduce complex literals
by providing different (or no) diagnostics on imaginary constants (except
for integer ones).
For _DecimalN constants we don't support _Complex _DecimalN and error on any
i/j suffixes mixed with DD/DL/DF, so nothing changed there.

2024-11-13  Jakub Jelinek  <jakub@redhat.com>

	PR c/117029
libcpp/
	* include/cpplib.h (struct cpp_options): Add imaginary_constants
	member.
	* init.cc (struct lang_flags): Add imaginary_constants bitfield.
	(lang_defaults): Add column for imaginary_constants.
	(cpp_set_lang): Copy over imaginary_constants.
	* expr.cc (cpp_classify_number): Diagnose CPP_N_IMAGINARY
	non-CPP_N_FLOATING constants differently for C.
gcc/testsuite/
	* gcc.dg/cpp/pr7263-3.c: Adjust expected diagnostic wording.
	* gcc.dg/c23-imaginary-constants-1.c: New test.
	* gcc.dg/c23-imaginary-constants-2.c: New test.
	* gcc.dg/c23-imaginary-constants-3.c: New test.
	* gcc.dg/c23-imaginary-constants-4.c: New test.
	* gcc.dg/c23-imaginary-constants-5.c: New test.
	* gcc.dg/c23-imaginary-constants-6.c: New test.
	* gcc.dg/c23-imaginary-constants-7.c: New test.
	* gcc.dg/c23-imaginary-constants-8.c: New test.
	* gcc.dg/c23-imaginary-constants-9.c: New test.
	* gcc.dg/c23-imaginary-constants-10.c: New test.
	* gcc.dg/c2y-imaginary-constants-1.c: New test.
	* gcc.dg/c2y-imaginary-constants-2.c: New test.
	* gcc.dg/c2y-imaginary-constants-3.c: New test.
	* gcc.dg/c2y-imaginary-constants-4.c: New test.
	* gcc.dg/c2y-imaginary-constants-5.c: New test.
	* gcc.dg/c2y-imaginary-constants-6.c: New test.
	* gcc.dg/c2y-imaginary-constants-7.c: New test.
	* gcc.dg/c2y-imaginary-constants-8.c: New test.
	* gcc.dg/c2y-imaginary-constants-9.c: New test.
	* gcc.dg/c2y-imaginary-constants-10.c: New test.
	* gcc.dg/c2y-imaginary-constants-11.c: New test.
	* gcc.dg/c2y-imaginary-constants-12.c: New test.
This commit is contained in:
Jakub Jelinek
2024-11-13 09:41:41 +01:00
committed by Jakub Jelinek
parent 9b2915d95d
commit eb45d151fa
26 changed files with 594 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
libcpp/expr.cc
View File

@@ -911,8 +911,25 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token,
syntax_ok:
if (result & CPP_N_IMAGINARY)
cpp_pedwarning_with_line (pfile, CPP_W_PEDANTIC, virtual_location, 0,
"imaginary constants are a GCC extension");
{
if (CPP_OPTION (pfile, cplusplus) || (result & CPP_N_FLOATING) == 0)
cpp_pedwarning_with_line (pfile, CPP_W_PEDANTIC, virtual_location, 0,
"imaginary constants are a GCC extension");
else
{
bool warned = false;
if (!CPP_OPTION (pfile, imaginary_constants) && CPP_PEDANTIC (pfile))
warned
= cpp_pedwarning_with_line (pfile, CPP_W_PEDANTIC,
virtual_location, 0,
"imaginary constants are a C2Y "
"feature or GCC extension");
if (!warned && CPP_OPTION (pfile, cpp_warn_c23_c2y_compat) > 0)
cpp_warning_with_line (pfile, CPP_W_C23_C2Y_COMPAT,
virtual_location, 0,
"imaginary constants are a C2Y feature");
}
}
if (radix == 2)
{
bool warned = false;