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[SR-485] C macros of the form ((long long)-1) should be imported #43102

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lilyball mannequin opened this issue Jan 6, 2016 · 2 comments
Open

[SR-485] C macros of the form ((long long)-1) should be imported #43102

lilyball mannequin opened this issue Jan 6, 2016 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c/c++ macros c interop Feature: Interoperability with C compiler The Swift compiler in itself

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@lilyball
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Mannequin

lilyball mannequin commented Jan 6, 2016

Previous ID SR-485
Radar rdar://problem/20462344
Original Reporter @lilyball
Type Bug
Environment

Apple Swift version 2.1.1 (swiftlang-700.1.101.15 clang-700.1.81)
Target: x86_64-apple-darwin15.2.0

Additional Detail from JIRA
Votes 3
Component/s Compiler
Labels Bug, ClangImporter, Macros
Assignee None
Priority Medium

md5: 4f56b5e5a3db09cb27d77f8e3f9984fc

relates to:

  • SR-141 Complex C header files macros are ignored
  • SR-2402 Clang importer should import nullary function-like macros

Issue Description:

It turns out that NSURLResponseUnknownLength isn't exposed to Swift because the macro definition doesn't match Swift's rules for importable macros. The definition is:

#define NSURLResponseUnknownLength ((long long)-1)

This looks relatively straightforward, and should be simple enough that Swift can support. In general, any macro whose definition is the form ((SomeType)literal) should be importable.
@swift-ci
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Comment by Rick M (JIRA)

I'm having a similar problem with #define foo 1*2*3

@swift-ci
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Comment by Ky (JIRA)

This is necessary to complete the contract described in https://developer.apple.com/documentation/foundation/urlresponse/1413507-expectedcontentlength.

Without this, that contract cannot be fulfilled by API users

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added the c interop Feature: Interoperability with C label Feb 2, 2023
@benrimmington benrimmington mentioned this issue Jan 14, 2024
Open
@kateinoigakukun kateinoigakukun mentioned this issue Mar 7, 2024
Merged
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c/c++ macros c interop Feature: Interoperability with C compiler The Swift compiler in itself
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