C++: Fixed C++ number pattern (#1887)

components/prism-cpp.js

@@ -4,8 +4,12 @@ Prism.languages.cpp = Prism.languages.extend('c', {
 		lookbehind: true
 	},
 	'keyword': /\b(?:alignas|alignof|asm|auto|bool|break|case|catch|char|char16_t|char32_t|class|compl|const|constexpr|const_cast|continue|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|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/,
-	'boolean': /\b(?:true|false)\b/,
-	'operator': />>=?|<<=?|->|([-+&|:])\1|[?:~]|[-+*/%&|^!=<>]=?|\b(?:and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/
+	'number': {
+		pattern: /(?:\b0b[01']+|\b0x(?:[\da-f']+\.?[\da-f']*|\.[\da-f']+)(?:p[+-]?[\d']+)?|(?:\b[\d']+\.?[\d']*|\B\.[\d']+)(?:e[+-]?[\d']+)?)[ful]*/i,
+		greedy: true
+	},
+	'operator': />>=?|<<=?|->|([-+&|:])\1|[?:~]|[-+*/%&|^!=<>]=?|\b(?:and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/,
+	'boolean': /\b(?:true|false)\b/
 });
 
 Prism.languages.insertBefore('cpp', 'string', {

tests/languages/cpp/number_feature.test

@@ -0,0 +1,64 @@
+42
+3.14159
+4e10
+2.1e-10
+0.4e+2
+0xbabe
+0xBABE
+0x1.2
+0x0.3p-3
+0x0.3p4L
+42f
+42F
+42u
+42U
+42l
+42L
+0b0101
+0B0101
+
+18446744073709550592ull
+18'446'744'073'709'550'592llu
+1844'6744'0737'0955'0592uLL
+184467'440737'0'95505'92LLU
+1'048'576
+0x10'0000
+0'004'000'000
+1.602'176'565e-19
+0b010'01010
+
+----------------------------------------------------
+
+[
+	["number", "42"],
+	["number", "3.14159"],
+	["number", "4e10"],
+	["number", "2.1e-10"],
+	["number", "0.4e+2"],
+	["number", "0xbabe"],
+	["number", "0xBABE"],
+	["number", "0x1.2"],
+	["number", "0x0.3p-3"],
+	["number", "0x0.3p4L"],
+	["number", "42f"],
+	["number", "42F"],
+	["number", "42u"],
+	["number", "42U"],
+	["number", "42l"],
+	["number", "42L"],
+	["number", "0b0101"],
+	["number", "0B0101"],
+	["number", "18446744073709550592ull"],
+	["number", "18'446'744'073'709'550'592llu"],
+	["number", "1844'6744'0737'0955'0592uLL"],
+	["number", "184467'440737'0'95505'92LLU"],
+	["number", "1'048'576"],
+	["number", "0x10'0000"],
+	["number", "0'004'000'000"],
+	["number", "1.602'176'565e-19"],
+	["number", "0b010'01010"]
+]
+
+----------------------------------------------------
+
+Checks for binary, decimal, and hexadecimal numbers.