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[SR-12795] Can't call const C++ method on let constant #55240

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swift-ci opened this issue May 12, 2020 · 2 comments
Closed

[SR-12795] Can't call const C++ method on let constant #55240

swift-ci opened this issue May 12, 2020 · 2 comments
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@egorzhdan
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c++ interop Feature: Interoperability with C++ compiler The Swift compiler in itself good first issue Good for newcomers

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@swift-ci
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Previous ID SR-12795
Radar None
Original Reporter MForster (JIRA User)
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, CxxInterop, StarterBug
Assignee @egorzhdan
Priority Medium

md5: 44f47dbedbd9065def121bac64cc954f

duplicates:

  • SR-12749 [C++] Import C++ const methods as non-mutating

Issue Description:

In C++:

struct S {
  int getConstant() const { return 42; }
};

In Swift:

let x = S()
x.getConstant()

Error Message:

foo.swift:6:3: error: cannot use mutating member on immutable value: 'x' is a 'let' constant
x.getConstant()
~ ^
foo.swift:5:1: note: change 'let' to 'var' to make it mutable
let x = S()
^~~
var
@egorzhdan
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PR: #38618

@zoecarver
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@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@zoecarver zoecarver added c++ interop Feature: Interoperability with C++ and removed CxxInterop labels Apr 25, 2022
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@egorzhdan egorzhdan

Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c++ interop Feature: Interoperability with C++ compiler The Swift compiler in itself good first issue Good for newcomers
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@egorzhdan @zoecarver @swift-ci