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  • Retrieving the definition
  • Limits
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Stored procedures
Retrieves the definition of element type.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
iPhone/iPad This function is now available for the iPhone/iPad applications.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
iPhone/iPad This function is now available for the iPhone/iPad applications.
Universal Windows 10 App This function is now available in Windows Store apps mode.
iPhone/iPad This function is now available for the iPhone/iPad applications.
Versions 21 and later
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Apple Watch This function is now available in Apple Watch mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Example
PROCÉDURE Proc(x)
// Retrieves the definition of x type
MyDefinition is Definition
MyDefinition = GetDefinition(x)
Syntax
<Result> = GetDefinition(<Element>)
<Result>: Definition
Definition variable.
<Element>: Variable or class member
Element for which the definition will be retrieved.
Remarks

Retrieving the definition

GetDefinition is used to retrieve the definition of content type (and not the definition of variable type).
Example:
If two classes "DerivedClasse" and "BaseClass" derive from each other. If the instances of "DerivedClass" and "BaseClass" are handled by a "dynamic BaseClass" variable, GetDefinition returns the definition of real class of instance.
po is dynamic BaseClass
d is Definition

po = new BaseClass
d = GetDefinition(po)
Trace(d..Name)

po = new DerivedClass
d = GetDefinition(po)
Trace(d..Name)
If the type of the element is not supported, GetDefinition returns a Null definition associated with the non-fatal error "invalid definition".
If the element is not allocated, GetDefinition returns a Null definition associated with the non-fatal error "element not allocated".
The error cases can be processed:
  • by comparing the description to Null.
  • by checking the value of the ErrorOccurred variable.
The following types of elements are supported:
  • the variables and the members of native type
  • the variables and the members of advanced type
  • the variables and the members of class type
  • the variables and the members of structure type
The following types of elements are not supported:
  • the variables and the members of .NET type
  • the windows, reports, pages, controls, ...
  • the HFSQL files, the queries, the items, ...

Limits

  • In a project, you cannot retrieve the definition of an instance coming from:
    • an external component.
    • an internal component.
  • In an external component, you cannot retrieve the definition of an instance coming from the host project.
Components
WINDEVWEBDEV - Server codeReports and Queries wd230vm.dll
Linux wd230vm.so
Minimum required version
  • Version 16
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