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2d0f122529
Start deprecation period of identical functions in a single module merged-on-behalf-of: unknown
33 lines
876 B
Text
33 lines
876 B
Text
Diagnostics for conflicting function definitions within a module
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Previously, multiple definitions of identical functions within a module were not
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recognized, although they have the same mangling. This was problematic because a
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binary cannot contain multiple definitions of a symbol, which caused undefined
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behavior depending on the compiler backend.
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DMD will now raise an error message if there are conflicting implementations
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within a single module:
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---
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void foo() {}
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void foo() {} // error
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---
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Multiple declarations are still allowed as long as there is at most one definition:
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---
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void bar(int);
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void bar(int) { }
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void bar(int);
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---
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DMD will issue a deprecation for mangling schemes that don't support overloading
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(`extern(C|Windows|System)`):
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---
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extern(C):
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void foo(int) { }
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void foo(double) { } // deprecation
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---
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This deprecation will become an error in 2.105.
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