dotnet/roslyn

Suggestion to use `obj is SomeConst` instead of safe cast or direct Equals(object) call

Aberta

#45.232 aberto em 16 de jun. de 2020

 (5 comentários) (0 reação) (0 responsável)C# (4.257 forks)batch import
Area-IDEConcept-Continuous Improvementhelp wanted

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Description

obj as string == "x" and "x".Equals(obj) would be replaced with obj is "x".

This could apply to all constant types, so obj as bool? == SomeBoolConstant and SomeBoolConstant.Equals(obj) would be replaced with obj is SomeBoolConstant.

When CS0252 "Possible unintended reference comparison; to get a value comparison, cast the left hand side to type 'string'" is reported, this fix could offer to change obj == "x" to obj is "x".

Happy to implement.

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