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d77f5bcd0f
fixes #25803 This pull request introduces a new approach for generating C++ constructor expressions in the Nim compiler's C++ backend, ensuring that type-prefixed construction is used when needed (such as in assignments), rather than just braced initializer lists. It also adds a new test case (with corresponding C++ header) to verify correct behavior when assigning to types with overloaded assignment operators and constructors. **C++ code generation improvements:** * Added `genCppConstructorExpr` in `ccgtypes.nim`, which generates a full type-prefixed constructor expression (e.g., `Foo(a, b)`) for C++ code generation, as opposed to just a braced initializer list. This is important for contexts like assignments where the type must be explicit. * Updated `resetLoc` in `cgen.nim` to use `genCppConstructorExpr` instead of `genCppInitializer` when initializing imported C++ types, ensuring correct code generation for assignments. **Testing:** * Added a new C++ header file, `tcpp_default_ctor_assignment.h`, defining a struct `AmbiguousAssign` with overloaded assignment operators and constructors to test ambiguous assignment scenarios. * Added a corresponding Nim test, `tcpp_default_ctor_assignment.nim`, which exercises construction and assignment for the imported C++ type, ensuring the new code generation logic works as intended.
14 lines
236 B
Nim
14 lines
236 B
Nim
discard """
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cmd: "nim cpp $file"
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"""
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type
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AmbiguousAssign {.importcpp, header: "tcpp_default_ctor_assignment.h".} = object
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x: cint
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y: cstring
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proc main =
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var xs = newSeq[AmbiguousAssign](3)
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doAssert xs.len == 3
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main() |