macro.return: Difference between revisions
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The variable ''macro.return'' holds the value returned from a called macro to the calling macro. | The variable ''macro.return'' holds the value returned from a called macro to the calling macro. Other than ''macro.return'', a called variable shares no other variables with the calling macro. | ||
==Examples== | ==Examples== | ||
Revision as of 05:16, 22 December 2008
The variable macro.return holds the value returned from a called macro to the calling macro. Other than macro.return, a called variable shares no other variables with the calling macro.
Examples
When a macro on a library token is called by another macro, the called macro may return a value to the called macro by assigning that value to the variable macro.args.
Calling Macro
The macro below calls a macro called getDamage on the library token "Lib:combat", passing the variable damageDice as an argument. It also sets
| Calling Macro | Called Macro |
|---|---|
[h:damageDice="2d6"]
[MACRO("getDamage@Lib:combat"):damageDice]
[h:damageProperties=macro.return]
[h:varsFromStrProp(damageProperties)] |
<!-- getDamage Macro -->
[h:returnData = ""]
[h:damageRoll = eval(macro.args) + 9]
[h:damageType = "piercing"]
You hit your target for [r:damageRoll] damage!
[h:returnData=setStrProp(returnData,"damType", damageType)]
[h:returnData=setStrProp(returnData,"damage", damageRoll)]
[h:macro.return=returnData] |
In the example above, we assume that the getDamage macro was called by another macro (for example, a token macro) and has received some value in the form of macro.args. The statements in getDamage are executed, and the final statement assigns the value of returnData to the variable macro.return.
When execution of the getDamage macro is complete and control is handed back to the calling macro, macro.return is also passed back to the calling macro, where it can be manipulated like any other variable.