Returns a new expression that represents a given constant value.
- iOS 3.0+
- macOS 10.4+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The constant value the new expression is to represent.
A new expression that represents the constant value,
Creating an Expression for a Value
Returns a new expression that extracts a value from the variable bindings dictionary for a given key.
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