lua.go

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

     1  package l
     2  
     3  import (
     4  	. "github.com/alecthomas/chroma" // nolint
     5  	"github.com/alecthomas/chroma/lexers/internal"
     6  )
     7  
     8  // Lua lexer.
     9  var Lua = internal.Register(MustNewLazyLexer(
    10  	&Config{
    11  		Name:      "Lua",
    12  		Aliases:   []string{"lua"},
    13  		Filenames: []string{"*.lua", "*.wlua"},
    14  		MimeTypes: []string{"text/x-lua", "application/x-lua"},
    15  	},
    16  	luaRules,
    17  ))
    18  
    19  func luaRules() Rules {
    20  	return Rules{
    21  		"root": {
    22  			{`#!.*`, CommentPreproc, nil},
    23  			Default(Push("base")),
    24  		},
    25  		"ws": {
    26  			{`(?:--\[(=*)\[[\w\W]*?\](\1)\])`, CommentMultiline, nil},
    27  			{`(?:--.*$)`, CommentSingle, nil},
    28  			{`(?:\s+)`, Text, nil},
    29  		},
    30  		"base": {
    31  			Include("ws"),
    32  			{`(?i)0x[\da-f]*(\.[\da-f]*)?(p[+-]?\d+)?`, LiteralNumberHex, nil},
    33  			{`(?i)(\d*\.\d+|\d+\.\d*)(e[+-]?\d+)?`, LiteralNumberFloat, nil},
    34  			{`(?i)\d+e[+-]?\d+`, LiteralNumberFloat, nil},
    35  			{`\d+`, LiteralNumberInteger, nil},
    36  			{`(?s)\[(=*)\[.*?\]\1\]`, LiteralString, nil},
    37  			{`::`, Punctuation, Push("label")},
    38  			{`\.{3}`, Punctuation, nil},
    39  			{`[=<>|~&+\-*/%#^]+|\.\.`, Operator, nil},
    40  			{`[\[\]{}().,:;]`, Punctuation, nil},
    41  			{`(and|or|not)\b`, OperatorWord, nil},
    42  			{`(break|do|else|elseif|end|for|if|in|repeat|return|then|until|while)\b`, KeywordReserved, nil},
    43  			{`goto\b`, KeywordReserved, Push("goto")},
    44  			{`(local)\b`, KeywordDeclaration, nil},
    45  			{`(true|false|nil)\b`, KeywordConstant, nil},
    46  			{`(function)\b`, KeywordReserved, Push("funcname")},
    47  			{`[A-Za-z_]\w*(\.[A-Za-z_]\w*)?`, Name, nil},
    48  			{`'`, LiteralStringSingle, Combined("stringescape", "sqs")},
    49  			{`"`, LiteralStringDouble, Combined("stringescape", "dqs")},
    50  		},
    51  		"funcname": {
    52  			Include("ws"),
    53  			{`[.:]`, Punctuation, nil},
    54  			{`(?:[^\W\d]\w*)(?=(?:(?:--\[(=*)\[[\w\W]*?\](\2)\])|(?:--.*$)|(?:\s+))*[.:])`, NameClass, nil},
    55  			{`(?:[^\W\d]\w*)`, NameFunction, Pop(1)},
    56  			{`\(`, Punctuation, Pop(1)},
    57  		},
    58  		"goto": {
    59  			Include("ws"),
    60  			{`(?:[^\W\d]\w*)`, NameLabel, Pop(1)},
    61  		},
    62  		"label": {
    63  			Include("ws"),
    64  			{`::`, Punctuation, Pop(1)},
    65  			{`(?:[^\W\d]\w*)`, NameLabel, nil},
    66  		},
    67  		"stringescape": {
    68  			{`\\([abfnrtv\\"\']|[\r\n]{1,2}|z\s*|x[0-9a-fA-F]{2}|\d{1,3}|u\{[0-9a-fA-F]+\})`, LiteralStringEscape, nil},
    69  		},
    70  		"sqs": {
    71  			{`'`, LiteralStringSingle, Pop(1)},
    72  			{`[^\\']+`, LiteralStringSingle, nil},
    73  		},
    74  		"dqs": {
    75  			{`"`, LiteralStringDouble, Pop(1)},
    76  			{`[^\\"]+`, LiteralStringDouble, nil},
    77  		},
    78  	}
    79  }
    80
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