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249 lines
8.4 KiB
249 lines
8.4 KiB
4 years ago
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/*
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Language: C-like foundation grammar for C/C++ grammars
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Author: Ivan Sagalaev <maniac@softwaremaniacs.org>
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Contributors: Evgeny Stepanischev <imbolk@gmail.com>, Zaven Muradyan <megalivoithos@gmail.com>, Roel Deckers <admin@codingcat.nl>, Sam Wu <samsam2310@gmail.com>, Jordi Petit <jordi.petit@gmail.com>, Pieter Vantorre <pietervantorre@gmail.com>, Google Inc. (David Benjamin) <davidben@google.com>
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*/
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/* In the future the intention is to split out the C/C++ grammars distinctly
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since they are separate languages. They will likely share a common foundation
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though, and this file sets the groundwork for that - so that we get the breaking
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change in v10 and don't have to change the requirements again later.
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See: https://github.com/highlightjs/highlight.js/issues/2146
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*/
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/** @type LanguageFn */
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function cLike(hljs) {
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function optional(s) {
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return '(?:' + s + ')?';
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}
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// added for historic reasons because `hljs.C_LINE_COMMENT_MODE` does
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// not include such support nor can we be sure all the grammars depending
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// on it would desire this behavior
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var C_LINE_COMMENT_MODE = hljs.COMMENT('//', '$', {
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contains: [{begin: /\\\n/}]
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});
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var DECLTYPE_AUTO_RE = 'decltype\\(auto\\)';
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var NAMESPACE_RE = '[a-zA-Z_]\\w*::';
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var TEMPLATE_ARGUMENT_RE = '<.*?>';
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var FUNCTION_TYPE_RE = '(' +
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DECLTYPE_AUTO_RE + '|' +
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optional(NAMESPACE_RE) +'[a-zA-Z_]\\w*' + optional(TEMPLATE_ARGUMENT_RE) +
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')';
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var CPP_PRIMITIVE_TYPES = {
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className: 'keyword',
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begin: '\\b[a-z\\d_]*_t\\b'
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};
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// https://en.cppreference.com/w/cpp/language/escape
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// \\ \x \xFF \u2837 \u00323747 \374
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var CHARACTER_ESCAPES = '\\\\(x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4,8}|[0-7]{3}|\\S)';
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var STRINGS = {
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className: 'string',
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variants: [
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{
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begin: '(u8?|U|L)?"', end: '"',
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illegal: '\\n',
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contains: [hljs.BACKSLASH_ESCAPE]
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},
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{
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begin: '(u8?|U|L)?\'(' + CHARACTER_ESCAPES + "|.)", end: '\'',
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illegal: '.'
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},
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hljs.END_SAME_AS_BEGIN({
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begin: /(?:u8?|U|L)?R"([^()\\ ]{0,16})\(/,
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end: /\)([^()\\ ]{0,16})"/,
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})
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]
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};
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var NUMBERS = {
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className: 'number',
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variants: [
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{ begin: '\\b(0b[01\']+)' },
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{ begin: '(-?)\\b([\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)(u|U|l|L|ul|UL|f|F|b|B)' },
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{ begin: '(-?)(\\b0[xX][a-fA-F0-9\']+|(\\b[\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)([eE][-+]?[\\d\']+)?)' }
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],
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relevance: 0
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};
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var PREPROCESSOR = {
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className: 'meta',
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begin: /#\s*[a-z]+\b/, end: /$/,
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keywords: {
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'meta-keyword':
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'if else elif endif define undef warning error line ' +
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'pragma _Pragma ifdef ifndef include'
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},
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contains: [
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{
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begin: /\\\n/, relevance: 0
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},
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hljs.inherit(STRINGS, {className: 'meta-string'}),
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{
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className: 'meta-string',
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begin: /<.*?>/, end: /$/,
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illegal: '\\n',
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},
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C_LINE_COMMENT_MODE,
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hljs.C_BLOCK_COMMENT_MODE
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]
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};
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var TITLE_MODE = {
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className: 'title',
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begin: optional(NAMESPACE_RE) + hljs.IDENT_RE,
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relevance: 0
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};
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var FUNCTION_TITLE = optional(NAMESPACE_RE) + hljs.IDENT_RE + '\\s*\\(';
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var CPP_KEYWORDS = {
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keyword: 'int float while private char char8_t char16_t char32_t catch import module export virtual operator sizeof ' +
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'dynamic_cast|10 typedef const_cast|10 const for static_cast|10 union namespace ' +
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'unsigned long volatile static protected bool template mutable if public friend ' +
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'do goto auto void enum else break extern using asm case typeid wchar_t ' +
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'short reinterpret_cast|10 default double register explicit signed typename try this ' +
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'switch continue inline delete alignas alignof constexpr consteval constinit decltype ' +
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'concept co_await co_return co_yield requires ' +
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'noexcept static_assert thread_local restrict final override ' +
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'atomic_bool atomic_char atomic_schar ' +
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'atomic_uchar atomic_short atomic_ushort atomic_int atomic_uint atomic_long atomic_ulong atomic_llong ' +
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'atomic_ullong new throw return ' +
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'and and_eq bitand bitor compl not not_eq or or_eq xor xor_eq',
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built_in: 'std string wstring cin cout cerr clog stdin stdout stderr stringstream istringstream ostringstream ' +
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'auto_ptr deque list queue stack vector map set pair bitset multiset multimap unordered_set ' +
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'unordered_map unordered_multiset unordered_multimap priority_queue make_pair array shared_ptr abort terminate abs acos ' +
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'asin atan2 atan calloc ceil cosh cos exit exp fabs floor fmod fprintf fputs free frexp ' +
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'fscanf future isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper ' +
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'isxdigit tolower toupper labs ldexp log10 log malloc realloc memchr memcmp memcpy memset modf pow ' +
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'printf putchar puts scanf sinh sin snprintf sprintf sqrt sscanf strcat strchr strcmp ' +
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'strcpy strcspn strlen strncat strncmp strncpy strpbrk strrchr strspn strstr tanh tan ' +
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'vfprintf vprintf vsprintf endl initializer_list unique_ptr _Bool complex _Complex imaginary _Imaginary',
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literal: 'true false nullptr NULL'
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};
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var EXPRESSION_CONTAINS = [
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PREPROCESSOR,
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CPP_PRIMITIVE_TYPES,
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C_LINE_COMMENT_MODE,
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hljs.C_BLOCK_COMMENT_MODE,
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NUMBERS,
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STRINGS
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];
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var EXPRESSION_CONTEXT = {
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// This mode covers expression context where we can't expect a function
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// definition and shouldn't highlight anything that looks like one:
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// `return some()`, `else if()`, `(x*sum(1, 2))`
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variants: [
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{begin: /=/, end: /;/},
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{begin: /\(/, end: /\)/},
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{beginKeywords: 'new throw return else', end: /;/}
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],
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keywords: CPP_KEYWORDS,
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contains: EXPRESSION_CONTAINS.concat([
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{
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begin: /\(/, end: /\)/,
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keywords: CPP_KEYWORDS,
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contains: EXPRESSION_CONTAINS.concat(['self']),
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relevance: 0
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}
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]),
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relevance: 0
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};
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var FUNCTION_DECLARATION = {
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className: 'function',
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begin: '(' + FUNCTION_TYPE_RE + '[\\*&\\s]+)+' + FUNCTION_TITLE,
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returnBegin: true, end: /[{;=]/,
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excludeEnd: true,
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keywords: CPP_KEYWORDS,
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illegal: /[^\w\s\*&:<>]/,
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contains: [
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{ // to prevent it from being confused as the function title
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begin: DECLTYPE_AUTO_RE,
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keywords: CPP_KEYWORDS,
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relevance: 0,
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},
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{
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begin: FUNCTION_TITLE, returnBegin: true,
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contains: [TITLE_MODE],
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relevance: 0
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},
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{
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className: 'params',
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begin: /\(/, end: /\)/,
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keywords: CPP_KEYWORDS,
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relevance: 0,
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contains: [
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C_LINE_COMMENT_MODE,
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hljs.C_BLOCK_COMMENT_MODE,
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STRINGS,
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NUMBERS,
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CPP_PRIMITIVE_TYPES,
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// Count matching parentheses.
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{
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begin: /\(/, end: /\)/,
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keywords: CPP_KEYWORDS,
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relevance: 0,
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contains: [
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'self',
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C_LINE_COMMENT_MODE,
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hljs.C_BLOCK_COMMENT_MODE,
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STRINGS,
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NUMBERS,
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CPP_PRIMITIVE_TYPES
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]
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}
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]
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},
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CPP_PRIMITIVE_TYPES,
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C_LINE_COMMENT_MODE,
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hljs.C_BLOCK_COMMENT_MODE,
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PREPROCESSOR
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]
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};
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return {
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aliases: ['c', 'cc', 'h', 'c++', 'h++', 'hpp', 'hh', 'hxx', 'cxx'],
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keywords: CPP_KEYWORDS,
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// the base c-like language will NEVER be auto-detected, rather the
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// derivitives: c, c++, arduino turn auto-detect back on for themselves
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disableAutodetect: true,
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illegal: '</',
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contains: [].concat(
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EXPRESSION_CONTEXT,
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FUNCTION_DECLARATION,
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EXPRESSION_CONTAINS,
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[
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PREPROCESSOR,
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{ // containers: ie, `vector <int> rooms (9);`
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begin: '\\b(deque|list|queue|priority_queue|pair|stack|vector|map|set|bitset|multiset|multimap|unordered_map|unordered_set|unordered_multiset|unordered_multimap|array)\\s*<', end: '>',
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keywords: CPP_KEYWORDS,
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contains: ['self', CPP_PRIMITIVE_TYPES]
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},
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{
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begin: hljs.IDENT_RE + '::',
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keywords: CPP_KEYWORDS
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},
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{
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className: 'class',
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beginKeywords: 'enum class struct union', end: /[{;:<>=]/,
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contains: [
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{ beginKeywords: "final class struct" },
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hljs.TITLE_MODE
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]
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}
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]),
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exports: {
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preprocessor: PREPROCESSOR,
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strings: STRINGS,
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keywords: CPP_KEYWORDS
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}
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};
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}
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module.exports = cLike;
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