Erroneous LValue RValue Ambiguity

[dstodev]

Type: LanguageService

Describe the bug

• OS and Version: MacOS Catalina 10.15.3
• VS Code Version: 1.42.0
• C/C++ Extension Version: 0.26.3
• Other extensions you installed (and if the issue persists after disabling them): CMake-Tools
• A clear and concise description of what the bug is:

With two functions:

template<typename T>
void fun(T& v)

template<typename T>
void fun(T&& v)

Calling them like:

int a = 1;
fun(a);
fun(2);

will cause a red squiggle to appear under fun(a) with the following message:

more than one instance of overloaded function "printValueCategory" matches the argument list: -- function template "void printValueCategory(T &v)" -- function template "void printValueCategory(T &&v)" -- argument types are: (int)

Program still compiles and executes correctly.

Expected behavior
Call is not labeled as ambiguous.

Additional context
Probably related: http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1164

The same compiler that succeeds in compiling the program is the same one being used by the intellisense engine.

[Colengms]

Hi @dstodev . Thanks for reporting this. I was able to repro using VS as well. (The C/C++ Extension for VS Code shares common code for intelliSense with VS).

I've opened the following bug against VS: https://developercommunity.visualstudio.com/content/problem/914403/erroneous-squiggle-for-lvaluervalue-ambiguity.html