Is T(x) considered a cast?

Question

The following is a cast:

int foo = (int) somefloat;

However, is this considered a cast?

int foo = int( somefloat );

More importantly, if there is a difference between the two, is the resulting compiled code different?

score 5 · Accepted Answer · edited May 23 '17 at 12:18

5

The second example is often called a function style cast and was added to C++ but there's no difference between the two in terms of semantics/object code.

Here's a good explanation of the reason that function style casts were added:

What exactly is or was the purpose of C++ function-style casts?

edited May 23 '17 at 12:18

Community

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answered Oct 02 '12 at 14:48

Benj

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score 2 · Answer 2 · answered Oct 02 '12 at 14:48

2

There is no difference of result, however only first example can be used in C. In C++ you can use both.

answered Oct 02 '12 at 14:48

Zaffy

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Would the second still be considered a C-style cast? – MarkP Oct 02 '12 at 14:49
@MarkP Yes, it's still a C-style cast with all of its disadvantages. – xaizek Oct 02 '12 at 14:52

score 1 · Answer 3 · answered Oct 02 '12 at 14:49

1

Yes, this is also a cast. C++ enables this style of casting, C only has (type)expression format casts. They're equivalent.

answered Oct 02 '12 at 14:49

Is T(x) considered a cast?

3 Answers3