C++: Added missing keywords and modules (#2763)

components/prism-cpp.js

@@ -1,6 +1,7 @@
 (function (Prism) {
 
-	var keyword = /\b(?:alignas|alignof|asm|auto|bool|break|case|catch|char|char8_t|char16_t|char32_t|class|compl|concept|const|consteval|constexpr|constinit|const_cast|continue|co_await|co_return|co_yield|decltype|default|delete|do|double|dynamic_cast|else|enum|explicit|export|extern|float|for|friend|goto|if|inline|int|int8_t|int16_t|int32_t|int64_t|uint8_t|uint16_t|uint32_t|uint64_t|long|mutable|namespace|new|noexcept|nullptr|operator|private|protected|public|register|reinterpret_cast|requires|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/;
+	var keyword = /\b(?:alignas|alignof|asm|auto|bool|break|case|catch|char|char8_t|char16_t|char32_t|class|compl|concept|const|consteval|constexpr|constinit|const_cast|continue|co_await|co_return|co_yield|decltype|default|delete|do|double|dynamic_cast|else|enum|explicit|export|extern|final|float|for|friend|goto|if|import|inline|int|int8_t|int16_t|int32_t|int64_t|uint8_t|uint16_t|uint32_t|uint64_t|long|module|mutable|namespace|new|noexcept|nullptr|operator|override|private|protected|public|register|reinterpret_cast|requires|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/;
+	var modName = /\b(?!<keyword>)\w+(?:\s*\.\s*\w+)*\b/.source.replace(/<keyword>/g, function () { return keyword.source; })
 
 	Prism.languages.cpp = Prism.languages.extend('c', {
 		'class-name': [
@@ -31,6 +32,26 @@
 	});
 
 	Prism.languages.insertBefore('cpp', 'string', {
+		'module': {
+			// https://en.cppreference.com/w/cpp/language/modules
+			pattern: RegExp(
+				/(\b(?:module|import)\s+)/.source +
+				'(?:' +
+				// header-name
+				/"(?:\\(?:\r\n|[\s\S])|[^"\\\r\n])*"|<[^<>\r\n]*>/.source +
+				'|' +
+				// module name or partition or both
+				/<mod-name>(?:\s*:\s*<mod-name>)?|:\s*<mod-name>/.source.replace(/<mod-name>/g, function () { return modName; }) +
+				')'
+			),
+			lookbehind: true,
+			greedy: true,
+			inside: {
+				'string': /^[<"][\s\S]+/,
+				'operator': /:/,
+				'punctuation': /\./
+			}
+		},
 		'raw-string': {
 			pattern: /R"([^()\\ ]{0,16})\([\s\S]*?\)\1"/,
 			alias: 'string',

tests/languages/cpp/keyword_feature.test

@@ -33,20 +33,24 @@ enum;
 explicit
 export
 extern
+final
 float
 for
 friend
 goto
 if
+import;
 inline
 int
 long
+module;
 mutable
 namespace
 new
 noexcept
 nullptr
 operator
+override
 private
 protected
 public
@@ -125,20 +129,24 @@ uint64_t
 	["keyword", "explicit"],
 	["keyword", "export"],
 	["keyword", "extern"],
+	["keyword", "final"],
 	["keyword", "float"],
 	["keyword", "for"],
 	["keyword", "friend"],
 	["keyword", "goto"],
 	["keyword", "if"],
+	["keyword", "import"], ["punctuation", ";"],
 	["keyword", "inline"],
 	["keyword", "int"],
 	["keyword", "long"],
+	["keyword", "module"], ["punctuation", ";"],
 	["keyword", "mutable"],
 	["keyword", "namespace"],
 	["keyword", "new"],
 	["keyword", "noexcept"],
 	["keyword", "nullptr"],
 	["keyword", "operator"],
+	["keyword", "override"],
 	["keyword", "private"],
 	["keyword", "protected"],
 	["keyword", "public"],

tests/languages/cpp/module_feature.test

@@ -0,0 +1,116 @@
+export module speech;
+
+export const char* get_phrase_en() {
+    return "Hello, world!";
+}
+
+export module speech;
+
+export import :english;
+export import :spanish;
+
+export module speech:english;
+
+import speech;
+import :PrivWidget;
+
+import <iostream>;
+import <cstdlib>;
+import "foo.h";
+import <baz.h>;
+
+module : private;
+
+----------------------------------------------------
+
+[
+	["keyword", "export"],
+	["keyword", "module"],
+	["module", ["speech"]],
+	["punctuation", ";"],
+
+	["keyword", "export"],
+	["keyword", "const"],
+	["keyword", "char"],
+	["operator", "*"],
+	["function", "get_phrase_en"],
+	["punctuation", "("],
+	["punctuation", ")"],
+	["punctuation", "{"],
+
+	["keyword", "return"],
+	["string", "\"Hello, world!\""],
+	["punctuation", ";"],
+
+	["punctuation", "}"],
+
+	["keyword", "export"],
+	["keyword", "module"],
+	["module", ["speech"]],
+	["punctuation", ";"],
+
+	["keyword", "export"],
+	["keyword", "import"],
+	["module", [
+		["operator", ":"],
+		"english"
+	]],
+	["punctuation", ";"],
+
+	["keyword", "export"],
+	["keyword", "import"],
+	["module", [
+		["operator", ":"],
+		"spanish"
+	]],
+	["punctuation", ";"],
+
+	["keyword", "export"],
+	["keyword", "module"],
+	["module", [
+		"speech",
+		["operator", ":"],
+		"english"
+	]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", ["speech"]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", [
+		["operator", ":"],
+		"PrivWidget"
+	]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", [
+		["string", "<iostream>"]
+	]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", [
+		["string", "<cstdlib>"]
+	]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", [
+		["string", "\"foo.h\""]
+	]],
+	["punctuation", ";"],
+
+	["keyword", "import"],
+	["module", [
+		["string", "<baz.h>"]
+	]],
+	["punctuation", ";"],
+
+	["keyword", "module"],
+	["operator", ":"],
+	["keyword", "private"],
+	["punctuation", ";"]
+]