• Dsby (1/1) Jul 12 2016 How can i call @system function in a @safe function?
• ag0aep6g (11/12) Jul 12 2016 You can't. You can mark the @safe function @trusted [1] instead.
• Dsby (2/16) Jul 12 2016 Thanks!

Dsby <dushibaiyu yahoo.com> writes:

How can i call  system function in a  safe function?

ag0aep6g <anonymous example.com> writes:

On 07/12/2016 11:09 AM, Dsby wrote:
 How can i call  system function in a  safe function?

You can't. You can mark the  safe function  trusted [1] instead. 
 trusted functions are considered memory-safe by the compiler and can be 
called from  safe code, but they can use  system features and call 
 system functions.

A  trusted function must still be memory-safe, and the compiler cannot 
check that it is, so you as the programmer take on the responsibility to 
ensure that the function is in fact memory-safe.

Be very careful with  trusted and make sure you know exactly what you're 
doing. A bad  trusted function compromises the whole call chain.


[1] https://dlang.org/spec/function.html#trusted-functions

Dsby <dushibaiyu yahoo.com> writes:

On Tuesday, 12 July 2016 at 09:17:37 UTC, ag0aep6g wrote:
 On 07/12/2016 11:09 AM, Dsby wrote:
 How can i call  system function in a  safe function?

 You can't. You can mark the  safe function  trusted [1] 
 instead.  trusted functions are considered memory-safe by the 
 compiler and can be called from  safe code, but they can use 
  system features and call  system functions.

 A  trusted function must still be memory-safe, and the compiler 
 cannot check that it is, so you as the programmer take on the 
 responsibility to ensure that the function is in fact 
 memory-safe.

 Be very careful with  trusted and make sure you know exactly 
 what you're doing. A bad  trusted function compromises the 
 whole call chain.


 [1] https://dlang.org/spec/function.html#trusted-functions

Thanks!