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

Prism.languages.mel = {
        'comment': {
                pattern: /\/\/.*|\/\*[\s\S]*?\*\//,
                greedy: true
        },
        'code': {
                pattern: /`(?:\\.|[^\\`])*`/,
                greedy: true,
                alias: 'italic',
                inside: {
                        'delimiter': {
                                pattern: /^`|`$/,
                                alias: 'punctuation'
                        },
                        'statement': {
                                pattern: /[\s\S]+/,
                                inside: null // see below
                        }
                }
        },
        'string': {
                pattern: /"(?:\\.|[^\\"\r\n])*"/,
                greedy: true
        },
        'variable': /\$\w+/,
        'number': /\b0x[\da-fA-F]+\b|\b\d+(?:\.\d*)?|\B\.\d+/,
        'flag': {
                pattern: /-[^\d\W]\w*/,
                alias: 'operator'
        },
        'keyword': /\b(?:break|case|continue|default|do|else|float|for|global|if|in|int|matrix|proc|return|string|switch|vector|while)\b/,
        'function': {
                pattern: /((?:^|[{;])[ \t]*)[a-z_]\w*\b(?!\s*(?:\.(?!\.)|[[{=]))|\b[a-z_]\w*(?=[ \t]*\()/im,
                lookbehind: true,
                greedy: true
        },

        'tensor-punctuation': {
                pattern: /<<|>>/,
                alias: 'punctuation'
        },
        'operator': /\+[+=]?|-[-=]?|&&|\|\||[<>]=?|[*\/!=]=?|[%^]/,
        'punctuation': /[.,:;?\[\](){}]/
};

Prism.languages.mel['code'].inside['statement'].inside = Prism.languages.mel;