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[SR-2401] Macros with bitwise operations should be imported #45008

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belkadan opened this issue Aug 18, 2016 · 0 comments
Open

[SR-2401] Macros with bitwise operations should be imported #45008

belkadan opened this issue Aug 18, 2016 · 0 comments
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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 itself

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@belkadan
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Previous ID SR-2401
Radar rdar://problem/18706771
Original Reporter @belkadan
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, ClangImporter, Macros
Assignee None
Priority Medium

md5: bf817a076ddc93edd071b2f1d749c10d

relates to:

  • SR-2402 Clang importer should import nullary function-like macros
  • SR-2530 Import macros containing string concatenation

Issue Description:

#define AVAILABLE_VALUE         0x10000
#define NOT_AVAILABLE_VALUE     (AVAILABLE_VALUE | 1)

Swift can see AVAILABLE_VALUE, but not NOT_AVAILABLE_VALUE because it has bitwise operations in it. Ideally the compiler should assume the identifier refers to a previous macro and constant-fold this.
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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 itself
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@belkadan @AnthonyLatsis