[RFC FS-1132] Interpolated strings syntax with multiple dollar signs #14640
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Using 3 bits
Replace enum<..>(..) usage in lex.fsl Use F.A ||| F.B instead of enum<F>(some int literal) in lex.fsl
Make brace matching work for interpolated strings with many braces. Adds one tests, but perhaps more tests would be good.
Refactor to keep the changes mostly contained into a new lexer rule. This makes it less likely to cause regression in regular interpolated strings and easier to put the feature behind a language version check, at a cost of some boiler-plate.
Replace call to args.diagnosticsLogger.ErrorR in lex.fsl
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Fix some names and remove unnecessary code
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Implements this RFC.
It is still WIP, my to do list:
%before interpolation holes)$s exceeds what can be encoded