CODEWITHSUNDEEP
c++pragma
Deepak Kiran
Deepak Kiran

Reputation: 317

Use of #pragma alias in c++

I would like to know what does the following piece of code do, when a user predefined macro __FLOATP__ is available

#ifdef __FLOATP__
#pragma alias   atanl  = atanf
#pragma alias   atan           = atanf
#endif

So does the piece of code compile usages the of atanl and atan to atanf, when the macro __FLOATP__ is available?

Upvotes: 2

Views: 514

Answers (1)

andreilomakin
andreilomakin

Reputation: 419

The #pragma directive is defined by the ANSI C standard for implementing directives that provide the compiler with various instructions. The presence of certain #pragma directives depends on the compiler.

In this case, as you correctly noted, #pragma alias acts when defining the __FLOATP__ macro. The #pragma alias indicates the linker that two identifier names are equivalent. I found this information here: #pragma alias.

Upvotes: 1

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