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package k
import (
. "github.com/alecthomas/chroma" // nolint
"github.com/alecthomas/chroma/lexers/internal"
)
// Kotlin lexer.
var Kotlin = internal.Register(MustNewLazyLexer(
&Config{
Name: "Kotlin",
Aliases: []string{"kotlin"},
Filenames: []string{"*.kt"},
MimeTypes: []string{"text/x-kotlin"},
DotAll: true,
},
kotlinRules,
))
func kotlinRules() Rules {
const kotlinIdentifier = "(?:[_\\p{L}][\\p{L}\\p{N}]*|`@?[_\\p{L}][\\p{L}\\p{N}]+`)"
return Rules{
"root": {
{`^\s*\[.*?\]`, NameAttribute, nil},
{`[^\S\n]+`, Text, nil},
{`\\\n`, Text, nil},
{`//[^\n]*\n?`, CommentSingle, nil},
{`/[*].*?[*]/`, CommentMultiline, nil},
{`\n`, Text, nil},
{`!==|!in|!is|===`, Operator, nil},
{`%=|&&|\*=|\+\+|\+=|--|-=|->|\.\.|\/=|::|<=|==|>=|!!|!=|\|\||\?[:.]`, Operator, nil},
{`[~!%^&*()+=|\[\]:;,.<>\/?-]`, Punctuation, nil},
{`[{}]`, Punctuation, nil},
{`"""`, LiteralString, Push("rawstring")},
{`"`, LiteralStringDouble, Push("string")},
{`(')(\\u[0-9a-fA-F]{4})(')`, ByGroups(LiteralStringChar, LiteralStringEscape, LiteralStringChar), nil},
{`'\\.'|'[^\\]'`, LiteralStringChar, nil},
{`0[xX][0-9a-fA-F]+[Uu]?[Ll]?|[0-9]+(\.[0-9]*)?([eE][+-][0-9]+)?[fF]?[Uu]?[Ll]?`, LiteralNumber, nil},
{`(companion)(\s+)(object)`, ByGroups(Keyword, Text, Keyword), nil},
{`(class|interface|object)(\s+)`, ByGroups(Keyword, Text), Push("class")},
{`(package|import)(\s+)`, ByGroups(Keyword, Text), Push("package")},
{`(val|var)(\s+)`, ByGroups(Keyword, Text), Push("property")},
{`(fun)(\s+)`, ByGroups(Keyword, Text), Push("function")},
{`(abstract|actual|annotation|as|as\?|break|by|catch|class|companion|const|constructor|continue|crossinline|data|delegate|do|dynamic|else|enum|expect|external|false|field|file|final|finally|for|fun|get|if|import|in|infix|init|inline|inner|interface|internal|is|it|lateinit|noinline|null|object|open|operator|out|override|package|param|private|property|protected|public|receiver|reified|return|sealed|set|setparam|super|suspend|tailrec|this|throw|true|try|typealias|typeof|val|var|vararg|when|where|while)\b`, Keyword, nil},
{`@` + kotlinIdentifier, NameDecorator, nil},
{kotlinIdentifier, Name, nil},
},
"package": {
{`\S+`, NameNamespace, Pop(1)},
},
"class": {
// \x60 is the back tick character (`)
{`\x60[^\x60]+?\x60`, NameClass, Pop(1)},
{kotlinIdentifier, NameClass, Pop(1)},
},
"property": {
{`\x60[^\x60]+?\x60`, NameProperty, Pop(1)},
{kotlinIdentifier, NameProperty, Pop(1)},
},
"generics-specification": {
{`<`, Punctuation, Push("generics-specification")}, // required for generics inside generics e.g. <T : List<Int> >
{`>`, Punctuation, Pop(1)},
{`[,:*?]`, Punctuation, nil},
{`(in|out|reified)`, Keyword, nil},
{`\x60[^\x60]+?\x60`, NameClass, nil},
{kotlinIdentifier, NameClass, nil},
{`\s+`, Text, nil},
},
"function": {
{`<`, Punctuation, Push("generics-specification")},
{`\x60[^\x60]+?\x60`, NameFunction, Pop(1)},
{kotlinIdentifier, NameFunction, Pop(1)},
{`\s+`, Text, nil},
},
"rawstring": {
// raw strings don't allow character escaping
{`"""`, LiteralString, Pop(1)},
{`(?:[^$"]+|\"{1,2}[^"])+`, LiteralString, nil},
Include("string-interpol"),
// remaining dollar signs are just a string
{`\$`, LiteralString, nil},
},
"string": {
{`\\[tbnr'"\\\$]`, LiteralStringEscape, nil},
{`\\u[0-9a-fA-F]{4}`, LiteralStringEscape, nil},
{`"`, LiteralStringDouble, Pop(1)},
Include("string-interpol"),
{`[^\n\\"$]+`, LiteralStringDouble, nil},
// remaining dollar signs are just a string
{`\$`, LiteralStringDouble, nil},
},
"string-interpol": {
{`\$` + kotlinIdentifier, LiteralStringInterpol, nil},
{`\${[^}\n]*}`, LiteralStringInterpol, nil},
},
}
}
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