Difference between revisions of "IFDEF"
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==Class== | ==Class== | ||
Applications | Applications | ||
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#DEFINE RECITAL 1 | #DEFINE RECITAL 1 | ||
#IFDEF RECITAL | #IFDEF RECITAL | ||
| − | + | set compatible to recital | |
| − | + | set filetype to recital | |
#ELSE | #ELSE | ||
| − | + | set compatible to vfp | |
| − | + | set filetype to vfp | |
#ENDIF | #ENDIF | ||
</code> | </code> | ||
Revision as of 10:00, 30 April 2009
Class
Applications
Purpose
Compiler directives to allow inclusion or exclusion of source code based on a compile-time constant
Syntax
#IFDEF <constant>
[<statements1>]
[#ELSE]
[<statements2>]
#ENDIF
See Also
COMPILE, DEFINE, DO, DO CASE, IF, SET COMPILE, SET DEVELOPMENT
Description
The #IFDEF compiler directive can be used to allow inclusion or exclusion of source code based on the existence of a compile-time constant. The constant, <constant>, is defined using the #DEFINE directive. At compile time, the compiler checks if the <constant> is defined. If it is defined, the <statements1> that follow are included in the compiled program file. The <statements1> can be any valid Recital 4GL commands. If the <constant> is not defined, the <statements1> are excluded. If the <constant> is not defined and there is a #ELSE directive specified, the <statements2> following the #ELSE directive are included in the compiled program file.
This directive can only be used in compiled programs.
Example
#DEFINE RECITAL 1 #IFDEF RECITAL set compatible to recital set filetype to recital #ELSE set compatible to vfp set filetype to vfp #ENDIF
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
