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[SR-11542] bad diagnostic when function invoked with trailing closure syntax and default args after closure #53943

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weissi opened this issue Sep 28, 2019 · 1 comment
Open

[SR-11542] bad diagnostic when function invoked with trailing closure syntax and default args after closure #53943

weissi opened this issue Sep 28, 2019 · 1 comment
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@gregomni
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation

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@weissi
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weissi commented Sep 28, 2019

Previous ID SR-11542
Radar rdar://problem/55806391
Original Reporter @weissi
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI
Assignee @gregomni
Priority Medium

md5: 3a7dc68bd8326dd7437f59d25f32964e

Issue Description:

The following program might not be quite correct (because the trailing closure syntax is used but it's not actually the last argument)

func test(_ body: () -> Void, file: StaticString = #file, line: UInt = #line) {}

test {}

The diagnostic however is pretty bad:

$ swift repro.swift
repro.swift:3:1: error: cannot invoke 'test' with an argument list of type '(() -> ())'
test {}
^
repro.swift:3:1: note: expected an argument list of type '(() -> Void, file: StaticString, line: UInt)'
test {}
^

it claims that it can't invoke test with an argument list of () -> () which totally works though 🙂
@weissi
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weissi commented Sep 28, 2019

@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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@gregomni gregomni

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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation
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@weissi