bsltf_bitwisecopyabletesttype

Detailed Description

Outline

• Purpose
• Classes
• Description
  • Attributes
  • Usage
    • Example 1: Printing the Supported Traits

Purpose

Provide a bitwise-copyable test class.

Classes

• bsltf::BitwiseCopyableTestType: bitwise-copyable test class

See also

bsltf_templatetestfacility

Description

This component provides a single, unconstrained (value-semantic) attribute class, BitwiseCopyableTestType, that is bitwise-copyable and defines the bslmf::IsBitwiseCopyable type trait.

Attributes

Name                Type         Default
------------------  -----------  -------
data                int          0

• data: representation of the class value

Usage

This section illustrates intended use of this component.

Example 1: Printing the Supported Traits

Suppose we wanted to print the supported traits of this test type.

First, we create a function template printTypeTraits with a parameterized TYPE:

/// Prints the traits of the parameterized 'TYPE' to the console.
template <class TYPE>
void printTypeTraits()
{
    if (bslma::UsesBslmaAllocator<TYPE>::value) {
        printf("Type defines bslma::UsesBslmaAllocator.\n");
    }
    else {
        printf(
             "Type does not define bslma::UsesBslmaAllocator.\n");
    }
 
    if (bls::is_trivially_copyable<TYPE>::value) {
        printf("Type defines bsl::is_trivially_copyable.\n");
    }
    else {
        printf("Type does not define bsl::is_trivially_copyable.\n");
    }
}

Now, we invoke the printTypeTraits function template using BitwiseCopyableTestType as the parameterized TYPE:

printTypeTraits<BitwiseCopyableTestType>();

Finally, we observe the console output:

Type does not define bslma::UsesBslmaAllocator.
Type defines bsl::is_trivially_copyable.