isDefined

Class: coder.descriptor.TypedRegion
Namespace: coder.descriptor

Determine if data element is defined in generated code

Since R2025a

Syntax

tf = isDefined(implementation)

tf = isDefined(implementation) returns 1 (true) if the data element is defined by the generated code. Otherwise, it returns 0 (false).

The data element is defined if all members of the TypedRegion object exist in the generated code.

Description of implementation of data in the generated code, specified as a coder.descriptor.TypedRegion object.

True or false result, returned as a 1 or 0 of data type logical.

Data Types: logical

Open the model.
```
openExample('CustomCodeComments')
```
Build the model.
```
slbuild('CustomCodeComments')
```
Create a coder.codedescriptor.CodeDescriptor object for the required model.
```
codeDescObj = coder.getCodeDescriptor('CustomCodeComments')
```
Return properties of the Inports data interface type in the generated code.
```
dataInterfaces = getDataInterfaces(codeDescObj, 'Inports')
```
Return properties of the code representation of the first Inport block.
```
implementation = dataInterfaces(1).Implementation
```
Return whether the data element is defined by its code representation.
```
isDefined(implementation)
```
```
ans =
  logical
   1
```
Since isDefined returned logical 1, all members of implementation exist in the generated code.

Introduced in R2025a