Pragmatic directives: Difference between revisions

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Additionally, parsing words sometimes alter compiler behavior. For example, the compiler uses type information from <code>TYPED:</code> words for optimizations.

=={{header|FreeBASIC}}==

FreeBASIC does not have pragmatic directives in the traditional sense.

However, it has several built-in keywords and functions that can affect program behavior in a similar way to pragmatic directives in other languages.

Thus, FreeBASIC has keywords such as <code>Public</code> and <code>Private</code> that can change the visibility of variables and functions within a module.

<syntaxhighlight lang="vbnet">Private Sub i_am_private

End Sub

Public Sub i_am_public

End Sub</syntaxhighlight>

It also has keywords like <code>CDecl</code>, <code>Pascal</code> and <code>StdCall</code> that can change the calling convention of a function.

Cdecl is usually the default calling convention for C compilers and is used almost exclusively on Unix, Linux, *BSD, and DOS-like systems.

<syntaxhighlight lang="vbnet">' declaring 'strcpy' from the standard C library

Declare Function strcpy Cdecl Alias "strcpy" (Byval dest As ZString Ptr, Byval src As ZString Ptr) As ZString Ptr</syntaxhighlight>

Pascal is the default calling convention for procedures in Microsoft QuickBASIC and is the standard convention used in the Windows 3.1 API.

<syntaxhighlight lang="vbnet">Declare Function MyFunctionPascal Pascal Alias "MyFunction" (param As Integer) As Integer</syntaxhighlight>

Stdcall is the default calling convention on Windows and the most common in BASIC languages and the Windows API.

<syntaxhighlight lang="vbnet">Declare Function MyFunc1 Stdcall (param1 As Integer, param2 As Integer) As Integer</syntaxhighlight>

=={{header|Go}}==