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

Prism.languages.tcl = {
        'comment': {
                pattern: /(^|[^\\])#.*/,
                lookbehind: true
        },
        'string': {
                pattern: /"(?:[^"\\\r\n]|\\(?:\r\n|[\s\S]))*"/,
                greedy: true
        },
        'variable': [
                {
                        pattern: /(\$)(?:::)?(?:[a-zA-Z0-9]+::)*\w+/,
                        lookbehind: true
                },
                {
                        pattern: /(\$)\{[^}]+\}/,
                        lookbehind: true
                },
                {
                        pattern: /(^[\t ]*set[ \t]+)(?:::)?(?:[a-zA-Z0-9]+::)*\w+/m,
                        lookbehind: true
                }
        ],
        'function': {
                pattern: /(^[\t ]*proc[ \t]+)\S+/m,
                lookbehind: true
        },
        'builtin': [
                {
                        pattern: /(^[\t ]*)(?:break|class|continue|error|eval|exit|for|foreach|if|proc|return|switch|while)\b/m,
                        lookbehind: true
                },
                /\b(?:else|elseif)\b/
        ],
        'scope': {
                pattern: /(^[\t ]*)(?:global|upvar|variable)\b/m,
                lookbehind: true,
                alias: 'constant'
        },
        'keyword': {
                pattern: /(^[\t ]*|\[)(?:Safe_Base|Tcl|after|append|apply|array|auto_(?:execok|import|load|mkindex|qualify|reset)|automkindex_old|bgerror|binary|catch|cd|chan|clock|close|concat|dde|dict|encoding|eof|exec|expr|fblocked|fconfigure|fcopy|file(?:event|name)?|flush|gets|glob|history|http|incr|info|interp|join|lappend|lassign|lindex|linsert|list|llength|load|lrange|lrepeat|lreplace|lreverse|lsearch|lset|lsort|math(?:func|op)|memory|msgcat|namespace|open|package|parray|pid|pkg_mkIndex|platform|puts|pwd|re_syntax|read|refchan|regexp|registry|regsub|rename|scan|seek|set|socket|source|split|string|subst|tcl(?:_endOfWord|_findLibrary|startOf(?:Next|Previous)Word|test|vars|wordBreak(?:After|Before))|tell|time|tm|trace|unknown|unload|unset|update|uplevel|vwait)\b/m,
                lookbehind: true
        },
        'operator': /!=?|\*\*?|==|&&?|\|\|?|<[=<]?|>[=>]?|[-+~\/%?^]|\b(?:eq|in|ne|ni)\b/,
        'punctuation': /[{}()\[\]]/
};