mirror of https://github.com/cheat/cheat.git
71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
package r
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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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// R/S lexer.
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var R = internal.Register(MustNewLazyLexer(
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&Config{
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Name: "R",
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Aliases: []string{"splus", "s", "r"},
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Filenames: []string{"*.S", "*.R", "*.r", ".Rhistory", ".Rprofile", ".Renviron"},
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MimeTypes: []string{"text/S-plus", "text/S", "text/x-r-source", "text/x-r", "text/x-R", "text/x-r-history", "text/x-r-profile"},
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},
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rRules,
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))
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func rRules() Rules {
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return Rules{
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"comments": {
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{`#.*$`, CommentSingle, nil},
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},
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"valid_name": {
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{"(?:`[^`\\\\]*(?:\\\\.[^`\\\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\\w_.]*)", Name, nil},
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},
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"punctuation": {
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{`\[{1,2}|\]{1,2}|\(|\)|;|,`, Punctuation, nil},
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},
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"keywords": {
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{`(if|else|for|while|repeat|in|next|break|return|switch|function)(?![\w.])`, KeywordReserved, nil},
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},
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"operators": {
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{`<<?-|->>?|-|==|<=|>=|<|>|&&?|!=|\|\|?|\?`, Operator, nil},
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{`\*|\+|\^|/|!|%[^%]*%|=|~|\$|@|:{1,3}`, Operator, nil},
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},
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"builtin_symbols": {
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{`(NULL|NA(_(integer|real|complex|character)_)?|letters|LETTERS|Inf|TRUE|FALSE|NaN|pi|\.\.(\.|[0-9]+))(?![\w.])`, KeywordConstant, nil},
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{`(T|F)\b`, NameBuiltinPseudo, nil},
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},
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"numbers": {
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{`0[xX][a-fA-F0-9]+([pP][0-9]+)?[Li]?`, LiteralNumberHex, nil},
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{`[+-]?([0-9]+(\.[0-9]+)?|\.[0-9]+|\.)([eE][+-]?[0-9]+)?[Li]?`, LiteralNumber, nil},
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},
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"statements": {
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Include("comments"),
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{`\s+`, Text, nil},
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{`\'`, LiteralString, Push("string_squote")},
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{`\"`, LiteralString, Push("string_dquote")},
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Include("builtin_symbols"),
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Include("valid_name"),
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Include("numbers"),
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Include("keywords"),
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Include("punctuation"),
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Include("operators"),
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},
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"root": {
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{"((?:`[^`\\\\]*(?:\\\\.[^`\\\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\\w_.]*))\\s*(?=\\()", NameFunction, nil},
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Include("statements"),
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{`\{|\}`, Punctuation, nil},
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{`.`, Text, nil},
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},
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"string_squote": {
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{`([^\'\\]|\\.)*\'`, LiteralString, Pop(1)},
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},
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"string_dquote": {
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{`([^"\\]|\\.)*"`, LiteralString, Pop(1)},
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},
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}
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}
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