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104 lines
3.7 KiB
Go
Vendored
104 lines
3.7 KiB
Go
Vendored
package h
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import (
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. "github.com/alecthomas/chroma" // nolint
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"github.com/alecthomas/chroma/lexers/internal"
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)
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// Haskell lexer.
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var Haskell = internal.Register(MustNewLazyLexer(
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&Config{
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Name: "Haskell",
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Aliases: []string{"haskell", "hs"},
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Filenames: []string{"*.hs"},
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MimeTypes: []string{"text/x-haskell"},
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},
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haskellRules,
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))
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func haskellRules() Rules {
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return Rules{
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"root": {
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{`\s+`, Text, nil},
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{`--(?![!#$%&*+./<=>?@^|_~:\\]).*?$`, CommentSingle, nil},
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{`\{-`, CommentMultiline, Push("comment")},
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{`\bimport\b`, KeywordReserved, Push("import")},
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{`\bmodule\b`, KeywordReserved, Push("module")},
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{`\berror\b`, NameException, nil},
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{`\b(case|class|data|default|deriving|do|else|family|if|in|infix[lr]?|instance|let|newtype|of|then|type|where|_)(?!\')\b`, KeywordReserved, nil},
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{`'[^\\]'`, LiteralStringChar, nil},
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{`^[_\p{Ll}][\w\']*`, NameFunction, nil},
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{`'?[_\p{Ll}][\w']*`, Name, nil},
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{`('')?[\p{Lu}][\w\']*`, KeywordType, nil},
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{`(')[\p{Lu}][\w\']*`, KeywordType, nil},
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{`(')\[[^\]]*\]`, KeywordType, nil},
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{`(')\([^)]*\)`, KeywordType, nil},
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{`\\(?![:!#$%&*+.\\/<=>?@^|~-]+)`, NameFunction, nil},
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{`(<-|::|->|=>|=)(?![:!#$%&*+.\\/<=>?@^|~-]+)`, OperatorWord, nil},
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{`:[:!#$%&*+.\\/<=>?@^|~-]*`, KeywordType, nil},
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{`[:!#$%&*+.\\/<=>?@^|~-]+`, Operator, nil},
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{`\d+[eE][+-]?\d+`, LiteralNumberFloat, nil},
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{`\d+\.\d+([eE][+-]?\d+)?`, LiteralNumberFloat, nil},
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{`0[oO][0-7]+`, LiteralNumberOct, nil},
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{`0[xX][\da-fA-F]+`, LiteralNumberHex, nil},
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{`\d+`, LiteralNumberInteger, nil},
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{`'`, LiteralStringChar, Push("character")},
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{`"`, LiteralString, Push("string")},
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{`\[\]`, KeywordType, nil},
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{`\(\)`, NameBuiltin, nil},
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{"[][(),;`{}]", Punctuation, nil},
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},
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"import": {
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{`\s+`, Text, nil},
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{`"`, LiteralString, Push("string")},
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{`\)`, Punctuation, Pop(1)},
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{`qualified\b`, Keyword, nil},
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{`([\p{Lu}][\w.]*)(\s+)(as)(\s+)([\p{Lu}][\w.]*)`, ByGroups(NameNamespace, Text, Keyword, Text, Name), Pop(1)},
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{`([\p{Lu}][\w.]*)(\s+)(hiding)(\s+)(\()`, ByGroups(NameNamespace, Text, Keyword, Text, Punctuation), Push("funclist")},
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{`([\p{Lu}][\w.]*)(\s+)(\()`, ByGroups(NameNamespace, Text, Punctuation), Push("funclist")},
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{`[\w.]+`, NameNamespace, Pop(1)},
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},
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"module": {
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{`\s+`, Text, nil},
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{`([\p{Lu}][\w.]*)(\s+)(\()`, ByGroups(NameNamespace, Text, Punctuation), Push("funclist")},
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{`[\p{Lu}][\w.]*`, NameNamespace, Pop(1)},
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},
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"funclist": {
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{`\s+`, Text, nil},
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{`[\p{Lu}]\w*`, KeywordType, nil},
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{`(_[\w\']+|[\p{Ll}][\w\']*)`, NameFunction, nil},
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{`--(?![!#$%&*+./<=>?@^|_~:\\]).*?$`, CommentSingle, nil},
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{`\{-`, CommentMultiline, Push("comment")},
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{`,`, Punctuation, nil},
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{`[:!#$%&*+.\\/<=>?@^|~-]+`, Operator, nil},
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{`\(`, Punctuation, Push("funclist", "funclist")},
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{`\)`, Punctuation, Pop(2)},
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},
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"comment": {
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{`[^-{}]+`, CommentMultiline, nil},
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{`\{-`, CommentMultiline, Push()},
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{`-\}`, CommentMultiline, Pop(1)},
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{`[-{}]`, CommentMultiline, nil},
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},
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"character": {
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{`[^\\']'`, LiteralStringChar, Pop(1)},
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{`\\`, LiteralStringEscape, Push("escape")},
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{`'`, LiteralStringChar, Pop(1)},
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},
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"string": {
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{`[^\\"]+`, LiteralString, nil},
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{`\\`, LiteralStringEscape, Push("escape")},
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{`"`, LiteralString, Pop(1)},
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},
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"escape": {
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{`[abfnrtv"\'&\\]`, LiteralStringEscape, Pop(1)},
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{`\^[][\p{Lu}@^_]`, LiteralStringEscape, Pop(1)},
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{`NUL|SOH|[SE]TX|EOT|ENQ|ACK|BEL|BS|HT|LF|VT|FF|CR|S[OI]|DLE|DC[1-4]|NAK|SYN|ETB|CAN|EM|SUB|ESC|[FGRU]S|SP|DEL`, LiteralStringEscape, Pop(1)},
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{`o[0-7]+`, LiteralStringEscape, Pop(1)},
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{`x[\da-fA-F]+`, LiteralStringEscape, Pop(1)},
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{`\d+`, LiteralStringEscape, Pop(1)},
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{`\s+\\`, LiteralStringEscape, Pop(1)},
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},
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}
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}
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