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[mypyc] Simplify union types#14363
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We can sometimes simplify an RType union, even if the mypy unioncouldn't be simplified. A typical example is `list[x] | list[y]`which can be simplified to just `list`. Previously this wouldgenerate a redundant union `union[list, list]`.
svalentin approved these changesDec 28, 2022
JukkaL added a commit that referenced this pull requestDec 28, 2022
Fix crash related to unions in loops. The crash was introduced in#14363.Flatten nested unions before simplifying unions.
JukkaL added a commit that referenced this pull requestDec 29, 2022
Flatten nested unions before simplifying unions.Simplify item type unions in loops. This fixes a crash introduced in#14363.
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We can sometimes simplify a mypyc RType union, even if the mypy union couldn't be simplified. A typical example is
list[x] | list[y]which can be simplified to justlist. Previously this would generate a redundant unionunion[list, list].