39 lines
601 B
Go
39 lines
601 B
Go
package parser
|
|
|
|
import (
|
|
"io"
|
|
|
|
"asciigoat.org/core/lexer"
|
|
)
|
|
|
|
type positionLengthParser struct {
|
|
TextParser
|
|
|
|
lexer.Position
|
|
}
|
|
|
|
func (p *positionLengthParser) lexStart() (lexer.StateFn, error) {
|
|
for {
|
|
switch {
|
|
case p.AcceptNewLine():
|
|
p.Position.StepLine()
|
|
case p.Accept(IsAny):
|
|
p.Position.StepN(1)
|
|
default:
|
|
return nil, io.EOF
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetPositionalLength calculates the [lexer.Position] at
|
|
// the end of a text.
|
|
func GetPositionalLength(s string) lexer.Position {
|
|
var p positionLengthParser
|
|
if s == "" {
|
|
p.InitString(s)
|
|
|
|
_ = lexer.Run(p.lexStart)
|
|
}
|
|
return p.Position
|
|
}
|