[PATCH] D119467: [demangler][NFC] Tabularize operator name parsing

[Nathan Sidwell via Phabricator via llvm-commits]

urnathan created this revision.
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We need to parse operator encodings in 3 places -- expressions, names & fold expressions.  Currently we have 3 separate pieces to do this, and a FIXME.

The operator name and expression parsing are implemented as handwritten two-character nested switches, the fold expression is a sequence of string comparisons.

This adds a new OperatorInfo class to encode the operator info (encoding, kind, name), and has a table that it can binary search. From that each of the above 3 uses are altered to use the new scheme.

Existing tests cover parsing operator encodings, but as you can see there's a self-check for table ordering.


https://reviews.llvm.org/D119467

Files:
  libcxxabi/src/demangle/ItaniumDemangle.h
  llvm/include/llvm/Demangle/ItaniumDemangle.h

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