BUG: C2954 Error When Using Class Template as Template-Parameter

View products that this article applies to.

This article was previously published under Q241940

SYMPTOMS

The following error message may appear if you try to use a class template as a template-parameter:

error C2954: template definitions cannot nest
error C2951: template declarations are only permitted at global or namespace scope
error C2226: syntax error : unexpected type 'C'
error C2143: syntax error : missing '>' before '{'
error C2059: syntax error : '<end Parse>'

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CAUSE

The compiler does not support template template-parameters as specified in the C++ Standard.

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STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

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MORE INFORMATION

Steps to Reproduce Behavior

The following sample code demonstrates the error:

//test.cpp
// compiler option needed: none

template<class T> class myarray { /* ... */ };
template<class K, class V, template<class T> class C = myarray>
class Map {
	C<K> key;
	C<V> value;
	};

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