Error parsing strings with curly braces in JavaScript blocks

This is example that break the parser:

str.replace(/\$\{/g, '\\${');

it throws:

Expected code block but "\n" found.

In my language playground.

As a workaround I’ve used escaped value:

str.replace(/\$\x7b/g, '\\$\x7b');

Curly braces in strings and regex confuse the parser. I’ve tried to use this on a Website:

{
  function foo(x) {
     return x.replace(/\}/g, '}');
  }
}

and it throws random errors.

[Mingun]

I plan to make an API that will allow plugins replace source code parsing part of the peggy grammar, so the plugins for other languages can implement a minimal subset to correctly parse braces for their languages. Peggy itself will contain only JS parser subset.

When this will be implemented, I’ll make issues/PRs to known plugins.

[Mingun]

I think, we can leave this open until proposed solution (pluggable CodeBlock parsers) will be implemented. This, however, requires some work to design a way for composing grammars, which is also required for import feature. Of course, we can implement a special mechanism just to support this case, but I think it will be better to use a generic solution