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1 package lexers
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2
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3 import (
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4 "strings"
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5
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6 . "github.com/alecthomas/chroma/v2" // nolint
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7 )
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8
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9 // Go lexer.
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10 var Go = Register(MustNewLexer(
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11 &Config{
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12 Name: "Go",
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13 Aliases: []string{"go", "golang"},
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14 Filenames: []string{"*.go"},
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15 MimeTypes: []string{"text/x-gosrc"},
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16 EnsureNL: true,
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17 },
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18 goRules,
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19 ).SetAnalyser(func(text string) float32 {
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20 if strings.Contains(text, "fmt.") && strings.Contains(text, "package ") {
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21 return 0.5
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22 }
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23 if strings.Contains(text, "package ") {
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24 return 0.1
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25 }
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26 return 0.0
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27 }))
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28
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29 func goRules() Rules {
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30 return Rules{
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31 "root": {
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32 {`\n`, Text, nil},
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33 {`\s+`, Text, nil},
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34 {`\\\n`, Text, nil},
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35 {`//(.*?)\n`, CommentSingle, nil},
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36 {`/(\\\n)?[*](.|\n)*?[*](\\\n)?/`, CommentMultiline, nil},
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37 {`(import|package)\b`, KeywordNamespace, nil},
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38 {`(var|func|struct|map|chan|type|interface|const)\b`, KeywordDeclaration, nil},
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39 {Words(``, `\b`, `break`, `default`, `select`, `case`, `defer`, `go`, `else`, `goto`, `switch`, `fallthrough`, `if`, `range`, `continue`, `for`, `return`), Keyword, nil},
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40 {`(true|false|iota|nil)\b`, KeywordConstant, nil},
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41 {Words(``, `\b(\()`, `uint`, `uint8`, `uint16`, `uint32`, `uint64`, `int`, `int8`, `int16`, `int32`, `int64`, `float`, `float32`, `float64`, `complex64`, `complex128`, `byte`, `rune`, `string`, `bool`, `error`, `uintptr`, `print`, `println`, `panic`, `recover`, `close`, `complex`, `real`, `imag`, `len`, `cap`, `append`, `copy`, `delete`, `new`, `make`), ByGroups(NameBuiltin, Punctuation), nil},
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42 {Words(``, `\b`, `uint`, `uint8`, `uint16`, `uint32`, `uint64`, `int`, `int8`, `int16`, `int32`, `int64`, `float`, `float32`, `float64`, `complex64`, `complex128`, `byte`, `rune`, `string`, `bool`, `error`, `uintptr`), KeywordType, nil},
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43 {`\d+i`, LiteralNumber, nil},
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44 {`\d+\.\d*([Ee][-+]\d+)?i`, LiteralNumber, nil},
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45 {`\.\d+([Ee][-+]\d+)?i`, LiteralNumber, nil},
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46 {`\d+[Ee][-+]\d+i`, LiteralNumber, nil},
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47 {`\d+(\.\d+[eE][+\-]?\d+|\.\d*|[eE][+\-]?\d+)`, LiteralNumberFloat, nil},
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48 {`\.\d+([eE][+\-]?\d+)?`, LiteralNumberFloat, nil},
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49 {`0[0-7]+`, LiteralNumberOct, nil},
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50 {`0[xX][0-9a-fA-F_]+`, LiteralNumberHex, nil},
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51 {`0b[01_]+`, LiteralNumberBin, nil},
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52 {`(0|[1-9][0-9_]*)`, LiteralNumberInteger, nil},
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53 {`'(\\['"\\abfnrtv]|\\x[0-9a-fA-F]{2}|\\[0-7]{1,3}|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|[^\\])'`, LiteralStringChar, nil},
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54 {"(`)([^`]*)(`)", ByGroups(LiteralString, UsingLexer(TypeRemappingLexer(GoTextTemplate, TypeMapping{{Other, LiteralString, nil}})), LiteralString), nil},
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55 {`"(\\\\|\\"|[^"])*"`, LiteralString, nil},
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56 {`(<<=|>>=|<<|>>|<=|>=|&\^=|&\^|\+=|-=|\*=|/=|%=|&=|\|=|&&|\|\||<-|\+\+|--|==|!=|:=|\.\.\.|[+\-*/%&])`, Operator, nil},
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57 {`([a-zA-Z_]\w*)(\s*)(\()`, ByGroups(NameFunction, UsingSelf("root"), Punctuation), nil},
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58 {`[|^<>=!()\[\]{}.,;:]`, Punctuation, nil},
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59 {`[^\W\d]\w*`, NameOther, nil},
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60 },
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61 }
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62 }
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63
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64 var GoHTMLTemplate = Register(DelegatingLexer(HTML, MustNewXMLLexer(
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65 embedded,
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66 "embedded/go_template.xml",
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67 ).SetConfig(
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68 &Config{
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69 Name: "Go HTML Template",
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70 Aliases: []string{"go-html-template"},
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71 },
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72 )))
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73
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74 var GoTextTemplate = Register(MustNewXMLLexer(
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75 embedded,
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76 "embedded/go_template.xml",
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77 ).SetConfig(
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78 &Config{
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79 Name: "Go Text Template",
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80 Aliases: []string{"go-text-template"},
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81 },
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82 ))
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