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

Prism.languages.chaiscript = Prism.languages.extend('clike', {
        'string': {
                pattern: /(^|[^\\])'(?:[^'\\]|\\[\s\S])*'/,
                lookbehind: true,
                greedy: true
        },
        'class-name': [
                {
                        // e.g. class Rectangle { ... }
                        pattern: /(\bclass\s+)\w+/,
                        lookbehind: true
                },
                {
                        // e.g. attr Rectangle::height, def Rectangle::area() { ... }
                        pattern: /(\b(?:attr|def)\s+)\w+(?=\s*::)/,
                        lookbehind: true
                }
        ],
        'keyword': /\b(?:attr|auto|break|case|catch|class|continue|def|default|else|finally|for|fun|global|if|return|switch|this|try|var|while)\b/,
        'number': [
                Prism.languages.cpp.number,
                /\b(?:Infinity|NaN)\b/
        ],
        'operator': />>=?|<<=?|\|\||&&|:[:=]?|--|\+\+|[=!<>+\-*/%|&^]=?|[?~]|`[^`\r\n]{1,4}`/,
});

Prism.languages.insertBefore('chaiscript', 'operator', {
        'parameter-type': {
                // e.g. def foo(int x, Vector y) {...}
                pattern: /([,(]\s*)\w+(?=\s+\w)/,
                lookbehind: true,
                alias: 'class-name'
        },
});

Prism.languages.insertBefore('chaiscript', 'string', {
        'string-interpolation': {
                pattern: /(^|[^\\])"(?:[^"$\\]|\\[\s\S]|\$(?!\{)|\$\{(?:[^{}]|\{(?:[^{}]|\{[^{}]*\})*\})*\})*"/,
                lookbehind: true,
                greedy: true,
                inside: {
                        'interpolation': {
                                pattern: /((?:^|[^\\])(?:\\{2})*)\$\{(?:[^{}]|\{(?:[^{}]|\{[^{}]*\})*\})*\}/,
                                lookbehind: true,
                                inside: {
                                        'interpolation-expression': {
                                                pattern: /(^\$\{)[\s\S]+(?=\}$)/,
                                                lookbehind: true,
                                                inside: Prism.languages.chaiscript
                                        },
                                        'interpolation-punctuation': {
                                                pattern: /^\$\{|\}$/,
                                                alias: 'punctuation'
                                        }
                                }
                        },
                        'string': /[\s\S]+/
                }
        },
});