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fix(parser): ignore trailing whitespace after negation #8

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fix(parser): ignore trailing whitespace after negation #8

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14 changes: 14 additions & 0 deletions parser.go
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,19 @@ func (p *parser) negation(t *Token) (Pattern, Error) {
return nil, _err
}

// remove trailing whitespace tokens
_length := len(_tokens)
for _length > 0 {
// if we have a non-whitespace token, we can stop
_length--
if _tokens[_length].Type != WHITESPACE {
break
}

// otherwise, truncate the token list
_tokens = _tokens[:_length]
}

// include the "negation" token at the front of the sequence
_tokens = append([]*Token{t}, _tokens...)

Expand Down Expand Up @@ -442,3 +455,4 @@ func (p *parser) errors(e Error) bool {
// - if this returns false, parsing will stop
return p._error(e)
} // errors()