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29 lines
1.6 KiB
Plaintext
29 lines
1.6 KiB
Plaintext
[[Property:title|New expression dialog]]
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[[Property:weight|2]]
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[[Property:uuid|95a78497-434d-759f-fdce-f9025c891495]]
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Adding new expressions to the [[Evaluation tool or Watch tool|list of expressions]] that should be dynamically evaluated is performed via a dialog.
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{|
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| [[Image:new-expression-definition-dlg]] <br/>
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context: Current feature
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| [[Image:new-expression-as-object-definition-dlg]] <br/>
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context: As object
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The first part in the dialog makes it possible to select the context of the expression.
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* The default context is the context of the [[Information relative to a stack element|currently selected call stack element]], as shown in the left image above. This context gives access to the locals, the arguments, the result and the enclosing object features.
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* The object context, that requires a valid object address, gives access to the features of the selected object. If you select "As object", the result of the expression is the referenced object itself; and you can supply a name for the object, as depicted in the right image above.
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* The last context, the class-related context, gives access to the <code>once</code> and constant features of that class. It requires a valid class name.
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The second part prompts for the expression itself. This field supports arguments, dot calls and operators (to a certain extent), but does not support creation expressions, agents or non-object calls. Genericity is partially supported.
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The "Keep Assertion Checking" checkbox is used to enable assertion checking during expression evaluation if desired (by default assertions won't be checked).
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