Awkward test type that is convertible to bool.
Synopsis
Declared in <bsltf_evilbooleantype.h>
struct EvilBooleanType;Description
This class provides a test type for predicates returning a type that is convertible‐to‐bool. It makes life reasonably difficult by disabling the address‐of and comma operators, but deliberately does not overload the && and || operators, as we hope the standard will be updated to no longer require such support. Once C++11 becomes available, this class would use an explicit operator bool() conversion operator, and explicitly supply the == and != operators, but we use the convertible‐to‐pointer‐to‐member idiom in the meantime. Implicitly defined operations fill out the API as needed.
Member Functions
Name |
Description |
|
Constructors |
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Destroy this object. |
Convert this object to a boolean‐testable result. |
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Return the newly created object having the logically negated value of this object. |
Non-Member Functions
Name |
Description |
Return whether two objects do not have the same value. |
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Return whether two objects have the same value. |
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