ElementType and Other Range Templates

ElementType and ElementEncodingType

ElementType provides the types of the elements of the range.

For example, the following template constraint includes a requirement for the element type of the first range:

void foo(I1, I2, O)(I1 input1, I2 input2, O output) 
        if (isInputRange!I1 &&
            isForwardRange!I2 &&
            isOutputRange!(O, ElementType!I1)) {
    // ...
}

The previous constraint means I1 is an InputRange and I2 is a ForwardRange and O is an OutputRange that accepts the element type of I1.

Since strings are always ranges of ...