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[SR-7520] Improve error message when hashValue / == synthesizing fails #50062

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swift-ci opened this issue Apr 24, 2018 · 2 comments
Open

[SR-7520] Improve error message when hashValue / == synthesizing fails #50062

swift-ci opened this issue Apr 24, 2018 · 2 comments
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compiler The Swift compiler in itself improvement

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@swift-ci
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Previous ID SR-7520
Radar None
Original Reporter Reitzig (JIRA User)
Type Improvement
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Improvement
Assignee None
Priority Medium

md5: 3c2c65e45038754229667846f1c8c176

Issue Description:

It would be great if the compiler error message for failed auto-synthesizing of ==, hashValue or similar fails.

Currently, it only outputs “does not conform to protocol ‘Hashable’”; it could inform us about why in a note. Going beyond SR-7519, typical cases include “property/associated value X is not Hashable so I could not synthesize hashValue”.
@belkadan
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belkadan commented May 1, 2018

@DougGregor, @slavapestov, do you know if there's a dup of this?

@stephentyrone
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https://forums.swift.org/t/type-cgpoint-does-not-conform-to-protocol-hashable/24821/4

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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compiler The Swift compiler in itself improvement
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@stephentyrone @belkadan @swift-ci