ALIAS: Difference between revisions
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(Removed redirect to DECLARE LIBRARY) Tag: Removed redirect |
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{{PageExamples}} | {{PageExamples}} | ||
;Example:Instead of creating a SUB with the Library statement inside of it, just rename it. | ;Example:Instead of creating a wrapper [[SUB]] with the Library statement inside of it, just rename it in the declaration. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|DECLARE LIBRARY}} | {{Cl|DECLARE LIBRARY}} | ||
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{{CodeEnd}} | {{CodeEnd}} | ||
{{PreStart}} | {{PreStart}} | ||
'''Explanation | '''Explanation''' | ||
When a Library procedure is used to represent another procedure name | |||
use '''ALIAS''' instead of creating a wrapper [[SUB]]. Just place your name for | |||
the procedure first with the actual Library name after '''ALIAS'''. | |||
{{PreEnd} | {{PreEnd}} | ||
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* [[SUB]], [[FUNCTION]] | * [[SUB]], [[FUNCTION]] | ||
* [[DECLARE LIBRARY]], [[BYVAL]] | * [[DECLARE LIBRARY]], [[BYVAL]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 22:59, 27 February 2024
The ALIAS clause in a DECLARE LIBRARY statement block tells the program the name of the procedure used in the external library.
Syntax
- DECLARE LIBRARY
- SUB pseudoname ALIAS actualname [(parameters)]
- END DECLARE
Parameters
- The pseudoname is the name of the SUB or FUNCTION the QB64 program will use.
- The actualname is the same procedure name as it is inside of the library code, it may optionally have a prepended namespace specification (e.g. ALIAS std::malloc).
- QB64 must use all parameters of imported procedures including optional ones.
Description
- The ALIAS name clause is optional as the original library procedure name can be used.
- The procedure name does not have to be inside of quotes when using DECLARE LIBRARY.
- QB64 does not support optional parameters.
Examples
- Example
- Instead of creating a wrapper SUB with the Library statement inside of it, just rename it in the declaration.
DECLARE LIBRARY SUB MouseMove ALIAS glutWarpPointer (BYVAL xoffset&, BYVAL yoffset&) END DECLARE DO UNTIL _SCREENEXISTS: LOOP PRINT "Hit a key to move the pointer to top left corner..." SLEEP MouseMove 1, 1 |
Explanation When a Library procedure is used to represent another procedure name use ALIAS instead of creating a wrapper SUB. Just place your name for the procedure first with the actual Library name after ALIAS. |
See also