CODEWITHSUNDEEP
d
Nan Xiao
Nan Xiao

Reputation: 17467

Why the type of size_t is uint in 64-bit Windows 7?

I am a newbie of programming D. After reading Fundamental Types, I decide to check the size_t type in my 64-bit Windows 7 OS. The code is like this: 

import std.stdio;

void main()
{
    writeln("Type: ", size_t.stringof);
    writeln("Size: ", size_t.sizeof);
}

After executing, the output is: 

Type: uint
Size: 4

Per my understanding, the type of size_t should be ulong on 64-bit OS.
Could anyone give any clue? Thanks very much in advance!

Upvotes: 5

Views: 664

Answers (1)

Vladimir Panteleev
Vladimir Panteleev

Reputation: 25187

The bitness of your program is distinct from the bitness of the OS or the compiler.

With DMD, to create a 64-bit executable, specify the -m64 switch. By default, DMD will create programs with the same bitness as the compiler, and the Windows package includes a 32-bit compiler. (If you wish, you can also build a 64-bit compiler from source code, but this will not affect how it builds either 32-bit or 64-bit programs.)

Upvotes: 9

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