Istream C2947 expecting '>' to terminate construct, found 'syntax'

Question

1.00/5 (2 votes)

See more:

There is an error occurred when I included the "istream" of VC2019.
How to solve this?

Error detail:

1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\include\istream(884,1): error C2947: <pre>expecting '>' to terminate construct, found 'syntax'

LN884:

template <class _Istr, class _Ty>
struct _Can_stream_in<_Istr, _Ty, void_t<decltype(_STD declval<_Istr&>() >> _STD declval<_Ty>())>> : true_type {};

What I have tried:

I compared this file between VC2015 and VC2019.

_Can_stream_in

is not defined in VC2015

Posted 25-Nov-21 19:14pm

Chrissie.ja

Updated 25-Nov-21 21:09pm

Add a Solution

Comments

phil.o 26-Nov-21 3:11am

I would check both C and C++ language standards used in both projects, and see whether they match.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2021-11-25T21:09:00

Solution 1

It is more likely that you have an error in your source file before the #include line, or another missing include. If you can demonstrate conclusively that it is in the istream header then you should report it to Microsoft.

Posted 25-Nov-21 21:09pm

Richard MacCutchan

Updated 26-Nov-21 0:11am

v2