func Lex(input string) *Lexer {
l := &Lexer{
input: input,
state: lexIndent,
indentLevels: data.NewStack(10),
widths: data.NewStack(10),
tokens: make(chan token.Token, 10),
}
l.indentLevels.Push(0)
go l.run()
return l
}
func (l *Lexer) emit(t token.Type) {
l.tokens <- token.Token{t, token.Position{l.lineCount(), l.charCount()}, l.current()}
l.start = l.pos
l.widths = data.NewStack(10)
}
func (l *lexer) emit(t tType) {
l.tokens <- token{t, l.lineCount(), l.current()}
l.start = l.pos
l.widths = data.NewStack(10)
}