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LWG-3878 import std; should guarantee initialization of standard iostreams objects #3436

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StephanTLavavej opened this issue Feb 12, 2023 · 2 comments
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LWG-3878 import std; should guarantee initialization of standard iostreams objects #3436

StephanTLavavej opened this issue Feb 12, 2023 · 2 comments
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LWG Library Working Group issue modules C++23 modules, C++20 header units resolved Successfully resolved without a commit

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@StephanTLavavej
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LWG-3878 import std; should guarantee initialization of standard iostreams objects

Need to investigate whether our iostreams machinery achieves this automatically, or if we need to do something special for Standard Library Modules. It sure seems like I can use cout normally.
@StephanTLavavej StephanTLavavej added LWG Library Working Group issue modules C++23 modules, C++20 header units labels Feb 12, 2023
@StephanTLavavej StephanTLavavej mentioned this issue Feb 12, 2023
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CaseyCarter added a commit to CaseyCarter/STL that referenced this issue Feb 13, 2023
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LWG-3769 basic_const_iterator::operator== causes infinite constrain…
fc0f803 
…t recursion

We implemented an earlier version of the resolution, this is the final version approved by WG21.

Fixes microsoft#3436
@CaseyCarter CaseyCarter mentioned this issue Feb 13, 2023
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cout works fine with no dynamic initializer in the TU for std::ios_base::Init. We use some #pragma init_seg(compiler) trickery to ensure that cout et al. are initialized before dynamic initializers run. This is all true for both modules and non-modules builds.

@StephanTLavavej StephanTLavavej added the resolved Successfully resolved without a commit label Feb 13, 2023
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Thanks, that explains it. I think we can close this.

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LWG Library Working Group issue modules C++23 modules, C++20 header units resolved Successfully resolved without a commit
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