From 1f69e63cfcc664fd7382dd877846007652a01dcf Mon Sep 17 00:00:00 2001
From: Ed Smith-Rowland <3dw4rd@verizon.net>
Date: Tue, 2 Feb 2021 16:11:57 -0500
Subject: c++: Implement C++23 P0330 - Literal Suffixes for ptrdiff_t and
 size_t.

Integer literal suffixes for signed size ('z') and unsigned size
(some permutation od 'zu') are provided as a language addition.

gcc/c-family/ChangeLog:

	* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_size_t_suffix.
	* c-lex.c (interpret_integer): Set node type for size literal.

libcpp/ChangeLog:

	* expr.c (interpret_int_suffix): Detect 'z' integer suffix.
	(cpp_classify_number): Compat warning for use of 'z' suffix.
	* include/cpplib.h (struct cpp_options): New flag.
	(enum cpp_warning_reason): New flag.
	(CPP_N_USERDEF): Comment C++0x -> C++11.
	(CPP_N_SIZE_T): New flag for cpp_classify_number.
	* init.c (cpp_set_lang): Initialize new flag.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/udlit-shadow-neg.C: Test for 'z' and 'zu' shadowing.
	* g++.dg/cpp23/feat-cxx2b.C: New test.
	* g++.dg/cpp23/size_t-literals.C: New test.
	* g++.dg/warn/Wsize_t-literals.C: New test.
---
 libcpp/include/cpplib.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libcpp/include')

diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h
index 4467c73..17feb64 100644
--- a/libcpp/include/cpplib.h
+++ b/libcpp/include/cpplib.h
@@ -500,6 +500,9 @@ struct cpp_options
   /* Nonzero means tokenize C++20 module directives.  */
   unsigned char module_directives;
 
+  /* Nonzero for C++23 size_t literals.  */
+  unsigned char size_t_literals;
+
   /* Holds the name of the target (execution) character set.  */
   const char *narrow_charset;
 
@@ -626,6 +629,7 @@ enum cpp_warning_reason {
   CPP_W_INVALID_PCH,
   CPP_W_WARNING_DIRECTIVE,
   CPP_W_LITERAL_SUFFIX,
+  CPP_W_SIZE_T_LITERALS,
   CPP_W_DATE_TIME,
   CPP_W_PEDANTIC,
   CPP_W_C90_C99_COMPAT,
@@ -1211,7 +1215,9 @@ struct cpp_num
 #define CPP_N_FLOATN	0x400000 /* _FloatN types.  */
 #define CPP_N_FLOATNX	0x800000 /* _FloatNx types.  */
 
-#define CPP_N_USERDEF	0x1000000 /* C++0x user-defined literal.  */
+#define CPP_N_USERDEF	0x1000000 /* C++11 user-defined literal.  */
+
+#define CPP_N_SIZE_T	0x2000000 /* C++23 size_t literal.  */
 
 #define CPP_N_WIDTH_FLOATN_NX	0xF0000000 /* _FloatN / _FloatNx value
 					      of N, divided by 16.  */
-- 
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