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Integrate purescript-cst #3555
Description
https://github.com/natefaubion/purescript-cst is at the point where it can parse and compile anything you throw at it (modulo intended breaking changes). It's faster, has better error reporting for many cases that require a lot of backtracking in the current parser, and it can serve as a basis for tooling (formatter) and a grammar specification.
Activity
natefaubion commentedon Mar 7, 2019
Fixes
natefaubion commentedon Mar 7, 2019
purescript-cst currently adds some stuff to account for a few of the things mentioned in #3517 so more code in the wild parses, but it can be removed (particularly stuff around
caseindentation).natefaubion commentedon Mar 7, 2019
This would also fix #3549.
Some other things it accounts for:
if/then/elseindosyntax. You can chain them without stair-stepping.psauses to find the minimal span for an error.hdgarrood commentedon Mar 8, 2019
Looks like the cst parser also fixes #3283.