[cxx-interop] Instantiate the std::function
constructor with a const pointer argument
#74619
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We were trying to instantiate a constructor for
std::function
from a C function pointer with a non-const function pointer type. That worked well on most platforms, wherestd::function
defines a single constructor for const and non-const function pointers, but failed on UBI 9.This fixes a test (
Interop/Cxx/stdlib/use-std-function.swift
) on UBI Linux.rdar://118026392