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is_nonzero<T>


Category: functors	Component type: type

Description

is_nonzero<T> is a function object. Specifically, it is an Adaptable Predicate, which means it is a function object that tests the truth or falsehood of some condition. If f is an object of class is_nonzero<T> and x is an object of class T, then f(x) returns true if x != 0 and false otherwise.

Example

Finds the first zero element in a list.

list<int> L;
...
list<int>::iterator first_nonzero = 
       find_if(L.begin(), L.end(),is_nonzero<int>());
assert(first_nonzero == L.end() || *first_nonzero == 0);

Definition

Defined in functors.hpp.

Template parameters

Parameter	Description	Default
`T`	The type of `is_nonzero`'s arguments.

Members

Member	Where defined	Description
`argument_type`	Adaptable Predicate	The type of the argument: `T`
`result_type`	Adaptable Predicate	The type of the result: `bool`
`is_nonzero()`	DefaultConstructible	The default constructor.
`bool operator()(const T& x)`	Unary Function	Function call operator. The return value is `x != 0`.

New members

All of is_nonzero's members are defined in the Adaptable Predicate and DefaultConstructible requirements. is_nonzero does not introduce any new members.

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is_nonzero<T>

Description

Example

Definition

Template parameters

Model of

Type requirements

Public base classes

Members

New members

Notes

See also