antlr.go

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

     1  package a
     2  
     3  import (
     4  	. "github.com/alecthomas/chroma" // nolint
     5  	"github.com/alecthomas/chroma/lexers/internal"
     6  )
     7  
     8  // ANTLR lexer.
     9  var ANTLR = internal.Register(MustNewLazyLexer(
    10  	&Config{
    11  		Name:      "ANTLR",
    12  		Aliases:   []string{"antlr"},
    13  		Filenames: []string{},
    14  		MimeTypes: []string{},
    15  	},
    16  	antlrRules,
    17  ))
    18  
    19  func antlrRules() Rules {
    20  	return Rules{
    21  		"whitespace": {
    22  			{`\s+`, TextWhitespace, nil},
    23  		},
    24  		"comments": {
    25  			{`//.*$`, Comment, nil},
    26  			{`/\*(.|\n)*?\*/`, Comment, nil},
    27  		},
    28  		"root": {
    29  			Include("whitespace"),
    30  			Include("comments"),
    31  			{`(lexer|parser|tree)?(\s*)(grammar\b)(\s*)([A-Za-z]\w*)(;)`, ByGroups(Keyword, TextWhitespace, Keyword, TextWhitespace, NameClass, Punctuation), nil},
    32  			{`options\b`, Keyword, Push("options")},
    33  			{`tokens\b`, Keyword, Push("tokens")},
    34  			{`(scope)(\s*)([A-Za-z]\w*)(\s*)(\{)`, ByGroups(Keyword, TextWhitespace, NameVariable, TextWhitespace, Punctuation), Push("action")},
    35  			{`(catch|finally)\b`, Keyword, Push("exception")},
    36  			{`(@[A-Za-z]\w*)(\s*)(::)?(\s*)([A-Za-z]\w*)(\s*)(\{)`, ByGroups(NameLabel, TextWhitespace, Punctuation, TextWhitespace, NameLabel, TextWhitespace, Punctuation), Push("action")},
    37  			{`((?:protected|private|public|fragment)\b)?(\s*)([A-Za-z]\w*)(!)?`, ByGroups(Keyword, TextWhitespace, NameLabel, Punctuation), Push("rule-alts", "rule-prelims")},
    38  		},
    39  		"exception": {
    40  			{`\n`, TextWhitespace, Pop(1)},
    41  			{`\s`, TextWhitespace, nil},
    42  			Include("comments"),
    43  			{`\[`, Punctuation, Push("nested-arg-action")},
    44  			{`\{`, Punctuation, Push("action")},
    45  		},
    46  		"rule-prelims": {
    47  			Include("whitespace"),
    48  			Include("comments"),
    49  			{`returns\b`, Keyword, nil},
    50  			{`\[`, Punctuation, Push("nested-arg-action")},
    51  			{`\{`, Punctuation, Push("action")},
    52  			{`(throws)(\s+)([A-Za-z]\w*)`, ByGroups(Keyword, TextWhitespace, NameLabel), nil},
    53  			{`(,)(\s*)([A-Za-z]\w*)`, ByGroups(Punctuation, TextWhitespace, NameLabel), nil},
    54  			{`options\b`, Keyword, Push("options")},
    55  			{`(scope)(\s+)(\{)`, ByGroups(Keyword, TextWhitespace, Punctuation), Push("action")},
    56  			{`(scope)(\s+)([A-Za-z]\w*)(\s*)(;)`, ByGroups(Keyword, TextWhitespace, NameLabel, TextWhitespace, Punctuation), nil},
    57  			{`(@[A-Za-z]\w*)(\s*)(\{)`, ByGroups(NameLabel, TextWhitespace, Punctuation), Push("action")},
    58  			{`:`, Punctuation, Pop(1)},
    59  		},
    60  		"rule-alts": {
    61  			Include("whitespace"),
    62  			Include("comments"),
    63  			{`options\b`, Keyword, Push("options")},
    64  			{`:`, Punctuation, nil},
    65  			{`'(\\\\|\\'|[^'])*'`, LiteralString, nil},
    66  			{`"(\\\\|\\"|[^"])*"`, LiteralString, nil},
    67  			{`<<([^>]|>[^>])>>`, LiteralString, nil},
    68  			{`\$?[A-Z_]\w*`, NameConstant, nil},
    69  			{`\$?[a-z_]\w*`, NameVariable, nil},
    70  			{`(\+|\||->|=>|=|\(|\)|\.\.|\.|\?|\*|\^|!|\#|~)`, Operator, nil},
    71  			{`,`, Punctuation, nil},
    72  			{`\[`, Punctuation, Push("nested-arg-action")},
    73  			{`\{`, Punctuation, Push("action")},
    74  			{`;`, Punctuation, Pop(1)},
    75  		},
    76  		"tokens": {
    77  			Include("whitespace"),
    78  			Include("comments"),
    79  			{`\{`, Punctuation, nil},
    80  			{`([A-Z]\w*)(\s*)(=)?(\s*)(\'(?:\\\\|\\\'|[^\']*)\')?(\s*)(;)`, ByGroups(NameLabel, TextWhitespace, Punctuation, TextWhitespace, LiteralString, TextWhitespace, Punctuation), nil},
    81  			{`\}`, Punctuation, Pop(1)},
    82  		},
    83  		"options": {
    84  			Include("whitespace"),
    85  			Include("comments"),
    86  			{`\{`, Punctuation, nil},
    87  			{`([A-Za-z]\w*)(\s*)(=)(\s*)([A-Za-z]\w*|\'(?:\\\\|\\\'|[^\']*)\'|[0-9]+|\*)(\s*)(;)`, ByGroups(NameVariable, TextWhitespace, Punctuation, TextWhitespace, Text, TextWhitespace, Punctuation), nil},
    88  			{`\}`, Punctuation, Pop(1)},
    89  		},
    90  		"action": {
    91  			{`([^${}\'"/\\]+|"(\\\\|\\"|[^"])*"|'(\\\\|\\'|[^'])*'|//.*$\n?|/\*(.|\n)*?\*/|/(?!\*)(\\\\|\\/|[^/])*/|\\(?!%)|/)+`, Other, nil},
    92  			{`(\\)(%)`, ByGroups(Punctuation, Other), nil},
    93  			{`(\$[a-zA-Z]+)(\.?)(text|value)?`, ByGroups(NameVariable, Punctuation, NameProperty), nil},
    94  			{`\{`, Punctuation, Push()},
    95  			{`\}`, Punctuation, Pop(1)},
    96  		},
    97  		"nested-arg-action": {
    98  			{`([^$\[\]\'"/]+|"(\\\\|\\"|[^"])*"|'(\\\\|\\'|[^'])*'|//.*$\n?|/\*(.|\n)*?\*/|/(?!\*)(\\\\|\\/|[^/])*/|/)+`, Other, nil},
    99  			{`\[`, Punctuation, Push()},
   100  			{`\]`, Punctuation, Pop(1)},
   101  			{`(\$[a-zA-Z]+)(\.?)(text|value)?`, ByGroups(NameVariable, Punctuation, NameProperty), nil},
   102  			{`(\\\\|\\\]|\\\[|[^\[\]])+`, Other, nil},
   103  		},
   104  	}
   105  }
   106
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