// digitsOrMinus consumes either a sequence of digits or the single
// char '-' followed by a space.
func digitsOrMinus(l *lexrec.Lexer, t lexrec.ItemType, emit bool) (success bool) {
if l.AcceptRun(digits) || (l.Accept("-") && l.Peek() == ' ') {
if emit {
l.Emit(t)
} else {
l.Skip()
}
return true
}
l.Errorf("expected a '-' or a sequence of %q, got %q", digits, l.Peek())
return false
}
// numericTz consumes a timezone field in the format [+-]HHMM or [+-]HH:MM
func numericTz(l *lexrec.Lexer, t lexrec.ItemType, emit bool) (success bool) {
// leading + or -
if !l.Accept(sign) {
l.Errorf("expected plus or minus sign, got %q", l.Peek())
l.Backup()
return false
}
// Accept two 0-9 digits
if !l.Accept(digits) || !l.Accept(digits) {
l.Errorf("expected 2-digit hour, got %q", l.Peek())
l.Backup()
return false
}
// Accept optional ':'
if ':' == l.Peek() {
l.Next()
}
// Accept two 0-9 digits
if !l.Accept(digits) || !l.Accept(digits) {
l.Errorf("expected 2-digit minute, got %q", l.Peek())
l.Backup()
return false
}
// Note we aren't bothering to check the next character, if
// it's a digit then we'll fail in the next StateFn.
if emit {
l.Emit(t)
} else {
l.Skip()
}
return true
}