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# IsInWhenClause()

Method in [IndentAwareLexer](/3.1/api/csharp/yarn.compiler/yarn.compiler.indentawarelexer.md)

## Summary

Returns a value indicating whether the lexer is currently lexing an expression that's part of a 'when' clause.

```csharp
public bool IsInWhenClause();
```

## Remarks

This value is set by [SetInWhenClause(bool)](/3.1/api/csharp/yarn.compiler/yarn.compiler.indentawarelexer/yarn.compiler.indentawarelexer.setinwhenclause.md) .