javascript.go

Documentation: github.com/alecthomas/chroma/lexers/j

     1  package j
     2  
     3  import (
     4  	. "github.com/alecthomas/chroma" // nolint
     5  	"github.com/alecthomas/chroma/lexers/internal"
     6  )
     7  
     8  // Javascript lexer.
     9  var JavascriptRules = Rules{
    10  	"commentsandwhitespace": {
    11  		{`\s+`, Text, nil},
    12  		{`<!--`, Comment, nil},
    13  		{`//.*?\n`, CommentSingle, nil},
    14  		{`/\*.*?\*/`, CommentMultiline, nil},
    15  	},
    16  	"slashstartsregex": {
    17  		Include("commentsandwhitespace"),
    18  		{`/(\\.|[^[/\\\n]|\[(\\.|[^\]\\\n])*])+/([gimuy]+\b|\B)`, LiteralStringRegex, Pop(1)},
    19  		{`(?=/)`, Text, Push("#pop", "badregex")},
    20  		Default(Pop(1)),
    21  	},
    22  	"badregex": {
    23  		{`\n`, Text, Pop(1)},
    24  	},
    25  	"root": {
    26  		{`\A#! ?/.*?\n`, CommentHashbang, nil},
    27  		{`^(?=\s|/|<!--)`, Text, Push("slashstartsregex")},
    28  		Include("commentsandwhitespace"),
    29  		{`\d+(\.\d*|[eE][+\-]?\d+)`, LiteralNumberFloat, nil},
    30  		{`0[bB][01]+`, LiteralNumberBin, nil},
    31  		{`0[oO][0-7]+`, LiteralNumberOct, nil},
    32  		{`0[xX][0-9a-fA-F]+`, LiteralNumberHex, nil},
    33  		{`[0-9][0-9_]*`, LiteralNumberInteger, nil},
    34  		{`\.\.\.|=>`, Punctuation, nil},
    35  		{`\+\+|--|~|&&|\?|:|\|\||\\(?=\n)|(<<|>>>?|==?|!=?|[-<>+*%&|^/])=?`, Operator, Push("slashstartsregex")},
    36  		{`[{(\[;,]`, Punctuation, Push("slashstartsregex")},
    37  		{`[})\].]`, Punctuation, nil},
    38  		{`(for|in|while|do|break|return|continue|switch|case|default|if|else|throw|try|catch|finally|new|delete|typeof|instanceof|void|yield|this|of)\b`, Keyword, Push("slashstartsregex")},
    39  		{`(var|let|with|function)\b`, KeywordDeclaration, Push("slashstartsregex")},
    40  		{`(abstract|async|await|boolean|byte|char|class|const|debugger|double|enum|export|extends|final|float|goto|implements|import|int|interface|long|native|package|private|protected|public|short|static|super|synchronized|throws|transient|volatile)\b`, KeywordReserved, nil},
    41  		{`(true|false|null|NaN|Infinity|undefined)\b`, KeywordConstant, nil},
    42  		{`(Array|Boolean|Date|Error|Function|Math|netscape|Number|Object|Packages|RegExp|String|Promise|Proxy|sun|decodeURI|decodeURIComponent|encodeURI|encodeURIComponent|Error|eval|isFinite|isNaN|isSafeInteger|parseFloat|parseInt|document|this|window)\b`, NameBuiltin, nil},
    43  		{`(?:[$_\p{L}\p{N}]|\\u[a-fA-F0-9]{4})(?:(?:[$\p{L}\p{N}]|\\u[a-fA-F0-9]{4}))*`, NameOther, nil},
    44  		{`"(\\\\|\\"|[^"])*"`, LiteralStringDouble, nil},
    45  		{`'(\\\\|\\'|[^'])*'`, LiteralStringSingle, nil},
    46  		{"`", LiteralStringBacktick, Push("interp")},
    47  	},
    48  	"interp": {
    49  		{"`", LiteralStringBacktick, Pop(1)},
    50  		{`\\\\`, LiteralStringBacktick, nil},
    51  		{"\\\\`", LiteralStringBacktick, nil},
    52  		{"\\\\[^`\\\\]", LiteralStringBacktick, nil},
    53  		{`\$\{`, LiteralStringInterpol, Push("interp-inside")},
    54  		{`\$`, LiteralStringBacktick, nil},
    55  		{"[^`\\\\$]+", LiteralStringBacktick, nil},
    56  	},
    57  	"interp-inside": {
    58  		{`\}`, LiteralStringInterpol, Pop(1)},
    59  		Include("root"),
    60  	},
    61  }
    62  
    63  // Javascript lexer.
    64  var Javascript = internal.Register(MustNewLexer( // nolint: forbidigo
    65  	&Config{
    66  		Name:      "JavaScript",
    67  		Aliases:   []string{"js", "javascript"},
    68  		Filenames: []string{"*.js", "*.jsm", "*.mjs"},
    69  		MimeTypes: []string{"application/javascript", "application/x-javascript", "text/x-javascript", "text/javascript"},
    70  		DotAll:    true,
    71  		EnsureNL:  true,
    72  	},
    73  	JavascriptRules,
    74  ))
    75
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