Compile-time function execution: Difference between revisions

Revision as of 02:58, 17 August 2011

Revision as of 23:39, 8 December 2011

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But withUsing compile time function evaluation the, code used to compute the factorial would be exactly the same as what one would write for run time evaluation.
Here's (thisan example codeof isCTFE in the [[D programming language]]<ref>[http://www.digitalmars.com/d/1.0/function.html#interpretation D 1.0 language specification: Functions]</ref>):

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This example specifies a valid D function called "factorial" which would typically be evaluated at run time. The use of <code>const</code> tells the compiler that the initializer for the variables must be computed at compile time. Note that the arguments to the function must be constant as well.<ref>[http://www.digitalmars.com/d/1.0/attribute.html#const D 1.0 language specification: Attributes]</ref>

CTFE can be used to populate data structures at compile-time in a simple way (D version 2):