mirror of https://github.com/cheat/cheat.git
55 lines
1.9 KiB
Go
55 lines
1.9 KiB
Go
package p
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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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// Prolog lexer.
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var Prolog = internal.Register(MustNewLazyLexer(
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&Config{
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Name: "Prolog",
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Aliases: []string{"prolog"},
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Filenames: []string{"*.ecl", "*.prolog", "*.pro", "*.pl"},
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MimeTypes: []string{"text/x-prolog"},
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},
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prologRules,
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))
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func prologRules() Rules {
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return Rules{
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"root": {
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{`/\*`, CommentMultiline, Push("nested-comment")},
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{`%.*`, CommentSingle, nil},
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{`0\'.`, LiteralStringChar, nil},
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{`0b[01]+`, LiteralNumberBin, nil},
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{`0o[0-7]+`, LiteralNumberOct, nil},
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{`0x[0-9a-fA-F]+`, LiteralNumberHex, nil},
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{`\d\d?\'[a-zA-Z0-9]+`, LiteralNumberInteger, nil},
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{`(\d+\.\d*|\d*\.\d+)([eE][+-]?[0-9]+)?`, LiteralNumberFloat, nil},
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{`\d+`, LiteralNumberInteger, nil},
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{`[\[\](){}|.,;!]`, Punctuation, nil},
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{`:-|-->`, Punctuation, nil},
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{`"(?:\\x[0-9a-fA-F]+\\|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|\\[0-7]+\\|\\["\nabcefnrstv]|[^\\"])*"`, LiteralStringDouble, nil},
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{`'(?:''|[^'])*'`, LiteralStringAtom, nil},
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{`is\b`, Operator, nil},
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{`(<|>|=<|>=|==|=:=|=|/|//|\*|\+|-)(?=\s|[a-zA-Z0-9\[])`, Operator, nil},
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{`(mod|div|not)\b`, Operator, nil},
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{`_`, Keyword, nil},
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{`([a-z]+)(:)`, ByGroups(NameNamespace, Punctuation), nil},
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{`([a-zÀ---][\w$À---]*)(\s*)(:-|-->)`, ByGroups(NameFunction, Text, Operator), nil},
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{`([a-zÀ---][\w$À---]*)(\s*)(\()`, ByGroups(NameFunction, Text, Punctuation), nil},
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{`[a-zÀ---][\w$À---]*`, LiteralStringAtom, nil},
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{`[#&*+\-./:<=>?@\\^~¡-¿‐-〿]+`, LiteralStringAtom, nil},
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{`[A-Z_]\w*`, NameVariable, nil},
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{`\s+|[ --]`, Text, nil},
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},
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"nested-comment": {
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{`\*/`, CommentMultiline, Pop(1)},
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{`/\*`, CommentMultiline, Push()},
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{`[^*/]+`, CommentMultiline, nil},
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{`[*/]`, CommentMultiline, nil},
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},
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}
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}
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