regexhq/es6-template-regex

Missing the right brace

Closed this issue · 1 comments

Spikef commented

Considering this situation:

'foo ${bar} baz ${quux.bbb + "{}"}'.match(/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g)

The matches[1] should be ${quux.bbb + "{}"} but got ${quux.bbb + "{}".

jonschlinkert commented

It's doing that because there is a nested brace set, so the match stops at the first closing brace it finds. Unfortunately, regex is not capable of tracking opening and closing delimiters as you would with a stack in a parser (to learn more about this, see chomsky's hierarchy. Regular expressions are a "Type 3 grammar").

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