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54 lines
1.0 KiB
54 lines
1.0 KiB
//go:generate stringer -type Token
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package argh
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import "fmt"
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const (
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ILLEGAL Token = iota
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EOL
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EMPTY // ''
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BS // ' ' '\t' '\n'
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IDENT // char group without flag prefix: 'some' 'words'
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ARG_DELIMITER // rune(0)
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ASSIGN // '='
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MULTI_VALUE_DELIMITER // ','
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LONG_FLAG // char group with double flag prefix: '--flag'
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SHORT_FLAG // single char with single flag prefix: '-f'
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COMPOUND_SHORT_FLAG // char group with single flag prefix: '-flag'
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STDIN_FLAG // '-'
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STOP_FLAG // '--'
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nul = rune(0)
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eol = rune(-1)
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)
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type Token int
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// Position is adapted from go/token.Position
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type Position struct {
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Column int
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}
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func (p *Position) IsValid() bool { return p.Column > 0 }
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func (p Position) String() string {
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s := ""
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if p.IsValid() {
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s = fmt.Sprintf("%d", p.Column)
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}
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if s == "" {
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s = "-"
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}
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return s
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}
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// Pos is borrowed from go/token.Pos
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type Pos int
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const NoPos Pos = 0
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func (p Pos) IsValid() bool {
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return p != NoPos
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}
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