ExpressionArgProcessor class

Processor that integrates https://pub.dev/packages/expressions library syntax with JsonWidgetRegistry variables and functions. All expressions should be placed in ${.*} syntax.

A few examples:

• ${var1} - find the value of 'var1' variable inside of JsonWidgetRegistry and return 'var1' it's name as the listen variable names.
• ${print('var1 value is: ' + var1)} - executes 'print' function from JsonWidgetRegistry. As the arg for that function it takes contatenation of 'var1 value is: ' string and the value of 'var1'.

Listen variable names for such a expression is 'var1'.

Implemented types

• ArgProcessor

Constructors

ExpressionArgProcessor()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

process(JsonWidgetRegistry registry, dynamic arg, Set<String>? listenVariables) → ProcessedArg

Process passed arg into ProcessedArg. The registry is giving functions and variables information context for the processing.

override

support(dynamic arg) → bool

Used to give the information if specified arg is supported by ArgProcessor.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited