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Merge pull request 'lexer: introduce Position.Add()' (#13)

Reviewed-on: #13
dev-amery v0.3.9
Alejandro Mery 11 months ago
parent
commit
5f816300f6
  1. 20
      lexer/position.go

20
lexer/position.go

@ -64,3 +64,23 @@ func (p *Position) StepLine() {
p.Line++
p.Column = 1
}
// Add adds a relative position considering
// potential new lines
func (p *Position) Add(rel Position) {
if p.Line == 0 {
p.Reset()
}
switch {
case rel.Line == 0:
// nothing
case rel.Line > 1:
// includes new lines
p.Line += rel.Line - 1
p.Column = rel.Column
default:
// same line
p.Column += rel.Column - 1
}
}

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