source: node_modules/prismjs/components/prism-d.js

Prism.languages.d = Prism.languages.extend('clike', {
        'comment': [
                {
                        // Shebang
                        pattern: /^\s*#!.+/,
                        greedy: true
                },
                {
                        pattern: RegExp(/(^|[^\\])/.source + '(?:' + [
                                // /+ comment +/
                                // Allow one level of nesting
                                /\/\+(?:\/\+(?:[^+]|\+(?!\/))*\+\/|(?!\/\+)[\s\S])*?\+\//.source,
                                // // comment
                                /\/\/.*/.source,
                                // /* comment */
                                /\/\*[\s\S]*?\*\//.source
                        ].join('|') + ')'),
                        lookbehind: true,
                        greedy: true
                }
        ],
        'string': [
                {
                        pattern: RegExp([
                                // r"", x""
                                /\b[rx]"(?:\\[\s\S]|[^\\"])*"[cwd]?/.source,

                                // q"[]", q"()", q"<>", q"{}"
                                /\bq"(?:\[[\s\S]*?\]|\([\s\S]*?\)|<[\s\S]*?>|\{[\s\S]*?\})"/.source,

                                // q"IDENT
                                // ...
                                // IDENT"
                                /\bq"((?!\d)\w+)$[\s\S]*?^\1"/.source,

                                // q"//", q"||", etc.
                                // eslint-disable-next-line regexp/strict
                                /\bq"(.)[\s\S]*?\2"/.source,

                                // eslint-disable-next-line regexp/strict
                                /(["`])(?:\\[\s\S]|(?!\3)[^\\])*\3[cwd]?/.source
                        ].join('|'), 'm'),
                        greedy: true
                },
                {
                        pattern: /\bq\{(?:\{[^{}]*\}|[^{}])*\}/,
                        greedy: true,
                        alias: 'token-string'
                }
        ],

        // In order: $, keywords and special tokens, globally defined symbols
        'keyword': /\$|\b(?:__(?:(?:DATE|EOF|FILE|FUNCTION|LINE|MODULE|PRETTY_FUNCTION|TIMESTAMP|TIME|VENDOR|VERSION)__|gshared|parameters|traits|vector)|abstract|alias|align|asm|assert|auto|body|bool|break|byte|case|cast|catch|cdouble|cent|cfloat|char|class|const|continue|creal|dchar|debug|default|delegate|delete|deprecated|do|double|dstring|else|enum|export|extern|false|final|finally|float|for|foreach|foreach_reverse|function|goto|idouble|if|ifloat|immutable|import|inout|int|interface|invariant|ireal|lazy|long|macro|mixin|module|new|nothrow|null|out|override|package|pragma|private|protected|ptrdiff_t|public|pure|real|ref|return|scope|shared|short|size_t|static|string|struct|super|switch|synchronized|template|this|throw|true|try|typedef|typeid|typeof|ubyte|ucent|uint|ulong|union|unittest|ushort|version|void|volatile|wchar|while|with|wstring)\b/,

        'number': [
                // The lookbehind and the negative look-ahead try to prevent bad highlighting of the .. operator
                // Hexadecimal numbers must be handled separately to avoid problems with exponent "e"
                /\b0x\.?[a-f\d_]+(?:(?!\.\.)\.[a-f\d_]*)?(?:p[+-]?[a-f\d_]+)?[ulfi]{0,4}/i,
                {
                        pattern: /((?:\.\.)?)(?:\b0b\.?|\b|\.)\d[\d_]*(?:(?!\.\.)\.[\d_]*)?(?:e[+-]?\d[\d_]*)?[ulfi]{0,4}/i,
                        lookbehind: true
                }
        ],

        'operator': /\|[|=]?|&[&=]?|\+[+=]?|-[-=]?|\.?\.\.|=[>=]?|!(?:i[ns]\b|<>?=?|>=?|=)?|\bi[ns]\b|(?:<[<>]?|>>?>?|\^\^|[*\/%^~])=?/
});

Prism.languages.insertBefore('d', 'string', {
        // Characters
        // 'a', '\\', '\n', '\xFF', '\377', '\uFFFF', '\U0010FFFF', '\quot'
        'char': /'(?:\\(?:\W|\w+)|[^\\])'/
});

Prism.languages.insertBefore('d', 'keyword', {
        'property': /\B@\w*/
});

Prism.languages.insertBefore('d', 'function', {
        'register': {
                // Iasm registers
                pattern: /\b(?:[ABCD][LHX]|E?(?:BP|DI|SI|SP)|[BS]PL|[ECSDGF]S|CR[0234]|[DS]IL|DR[012367]|E[ABCD]X|X?MM[0-7]|R(?:1[0-5]|[89])[BWD]?|R[ABCD]X|R[BS]P|R[DS]I|TR[3-7]|XMM(?:1[0-5]|[89])|YMM(?:1[0-5]|\d))\b|\bST(?:\([0-7]\)|\b)/,
                alias: 'variable'
        }
});