runtime(c): add new constexpr keyword to syntax file (C23)
closes: #16471
Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/c.vim b/runtime/syntax/c.vim
index eb56239..68b6778 100644
--- a/runtime/syntax/c.vim
+++ b/runtime/syntax/c.vim
@@ -1,7 +1,7 @@
" Vim syntax file
" Language: C
" Maintainer: The Vim Project <https://github.com/vim/vim>
-" Last Change: 2025 Jan 15
+" Last Change: 2025 Jan 18
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" Quit when a (custom) syntax file was already loaded
@@ -318,6 +318,9 @@
if !exists("c_no_c99") && !s:in_cpp_family
syn keyword cStorageClass inline restrict
endif
+if (s:ft ==# "c" && !exists("c_no_c23")) || (s:in_cpp_family && !exists("cpp_no_cpp11"))
+ syn keyword cStorageClass constexpr
+endif
if !exists("c_no_c11")
syn keyword cStorageClass _Alignas alignas
syn keyword cOperator _Alignof alignof
diff --git a/runtime/syntax/testdir/dumps/c_keywords_00.dump b/runtime/syntax/testdir/dumps/c_keywords_00.dump
new file mode 100644
index 0000000..e6cbe43
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_keywords_00.dump
@@ -0,0 +1,20 @@
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+@75
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+@75
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+|a+0#af5f00255&|l|i|g|n|o|f| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@58
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+|b+0#00e0003&|o@1|l| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@61
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+@57|1|,|1| @10|T|o|p|
diff --git a/runtime/syntax/testdir/dumps/c_keywords_01.dump b/runtime/syntax/testdir/dumps/c_keywords_01.dump
new file mode 100644
index 0000000..b1f0150
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_keywords_01.dump
@@ -0,0 +1,20 @@
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+|e+0#af5f00255&|l|s|e| +0#0000000&@70
+>e+0#00e0003&|n|u|m| +0#0000000&@70
+|e+0#00e0003&|x|t|e|r|n| +0#0000000&@68
+|f+0#e000002&|a|l|s|e| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@60
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+@57|1|9|,|1| @9|2|8|%|
diff --git a/runtime/syntax/testdir/dumps/c_keywords_02.dump b/runtime/syntax/testdir/dumps/c_keywords_02.dump
new file mode 100644
index 0000000..6e6629d
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_keywords_02.dump
@@ -0,0 +1,20 @@
+|r+0#af5f00255#ffffff0|e|t|u|r|n| +0#0000000&@68
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+|s+0#af5f00255&|i|z|e|o|f| +0#0000000&@68
+|s+0#00e0003&|t|a|t|i|c| +0#0000000&@68
+>s+0#af5f00255&|t|a|t|i|c|_|a|s@1|e|r|t| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@52
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+|t+0#00e0003&|h|r|e|a|d|_|l|o|c|a|l| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@53
+|t+0#e000002&|r|u|e| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@61
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+@75
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diff --git a/runtime/syntax/testdir/dumps/c_keywords_03.dump b/runtime/syntax/testdir/dumps/c_keywords_03.dump
new file mode 100644
index 0000000..5483936
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_keywords_03.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@74
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+|_+0#00e0003&|A|t|o|m|i|c| +0#0000000&|/+0#0000e05&@1| |(|C|1@1|)| +0#0000000&@58
+|_+0#00e0003&|B|i|t|I|n|t| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@58
+>_+0#00e0003&|B|o@1|l| +0#0000000&|/+0#0000e05&@1| |(|C|9@1|)|(|d|e|p|r|e|c|a|t|e|d| |i|n| |C|2|3|)| +0#0000000&@41
+|_+0#00e0003&|C|o|m|p|l|e|x| +0#0000000&|/+0#0000e05&@1| |(|C|9@1|)| +0#0000000&@57
+|_+0#00e0003&|D|e|c|i|m|a|l|1|2|8| +0#0000000&|/+0#0000e05&@1| |(|C|2|3|)| +0#0000000&@54
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+|_+0#af5f00255&|S|t|a|t|i|c|_|a|s@1|e|r|t| +0#0000000&|/+0#0000e05&@1| |(|C|1@1|)|(|d|e|p|r|e|c|a|t|e|d| |i|n| |C|2|3|)| +0#0000000&@32
+|_+0#00e0003&|T|h|r|e|a|d|_|l|o|c|a|l| +0#0000000&|/+0#0000e05&@1| |(|C|1@1|)|(|d|e|p|r|e|c|a|t|e|d| |i|n| |C|2|3|)| +0#0000000&@33
+|~+0#4040ff13&| @73
+|~| @73
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diff --git a/runtime/syntax/testdir/input/c_keywords.c b/runtime/syntax/testdir/input/c_keywords.c
new file mode 100644
index 0000000..fc994c2
--- /dev/null
+++ b/runtime/syntax/testdir/input/c_keywords.c
@@ -0,0 +1,64 @@
+// C keywords
+
+// Source: https://en.cppreference.com/w/c/keyword
+
+alignas // (C23)
+alignof // (C23)
+auto
+bool // (C23)
+break
+case
+char
+const
+constexpr // (C23)
+continue
+default
+do
+double
+else
+enum
+extern
+false // (C23)
+float
+for
+goto
+if
+inline // (C99)
+int
+long
+nullptr // (C23)
+register
+restrict // (C99)
+return
+short
+signed
+sizeof
+static
+static_assert // (C23)
+struct
+switch
+thread_local // (C23)
+true // (C23)
+typedef
+typeof // (C23)
+typeof_unqual // (C23)
+union
+unsigned
+void
+volatile
+while
+
+_Alignas // (C11)(deprecated in C23)
+_Alignof // (C11)(deprecated in C23)
+_Atomic // (C11)
+_BitInt // (C23)
+_Bool // (C99)(deprecated in C23)
+_Complex // (C99)
+_Decimal128 // (C23)
+_Decimal32 // (C23)
+_Decimal64 // (C23)
+_Generic // (C11)
+_Imaginary // (C99)
+_Noreturn // (C11)(deprecated in C23)
+_Static_assert // (C11)(deprecated in C23)
+_Thread_local // (C11)(deprecated in C23)