eval
eval() Function
• Introduced in version pre-1.3
Evaluates an expression in a string and returns the result. The string contains the same type of expression that is usually located between macro brackets (e.g { } or [r: 2+2]). eval() is commonly used to evaluate dynamically built input() parameters, or dice expressions stored in token properties.
For more complex evaluation functions, see evalMacro() and execMacro().
Usage
<syntaxhighlight lang="mtmacro" line> eval(expr) </source> Parameter
expr- A string containing the expression to be evaluated.
Examples
<syntaxhighlight lang="mtmacro" line>
[r: eval("1+1")]
</source>
Returns 2
<syntaxhighlight lang="mtmacro" line>
[r: eval("3d6")]
</source>
Returns a random number from 3 to 18.
<syntaxhighlight lang="mtmacro" line>
[r: eval("TestVar = 2")]
</source>
Returns 2
<syntaxhighlight lang="mtmacro" line>
[h: TestVar = 2][r: eval("TestVar/2")]
</source>
Returns 1
Tip
Since eval() only accepts strings as parameter and it happens quite often that you have either numbers or strings following code is a good method to make it work in any case.
<syntaxhighlight lang="mtmacro" line>
[h: foo = eval(string(bar))]