Whose execution sets the value of v to the incoming argument x.Ī non-final static variable declaration of the form static var v or the form static var v = e always induces an implicit static setter function with signature Ī static variable declaration of one of the forms static var v, static var v = e or static final v = e always induces an implicit static getter function with signatureĪ non-final static variable declaration of the form static T v or the form static T v = e always induces an implicit static setter function with signature Whose invocation evaluates as described below. Ī static variable declaration of one of the forms static T v, static T v = e or static final T v = e always induces an implicit static getter function with signature The static variables of a class C are those static variables declared by C. Static variables are variables whose declarations are immediately contained within a class declaration and that are declared static. It is a compile-time error if a top level variable is initialized with an expression that is not a compile-time constant. It is a compile-time error to preface a top level variable declaration with the built-in identifier static. Ī top-level variable is implicitly static. If a variable declaration does not explicitly specify a type, the type of the declared variable(s) is Dynamic, the unknown type.
This is especially crucial for Dart, which is designed for coding client applications. The lazy semantics are given because we do not want a language where one tends to define expensive initialization computations, causing long application startup times. The precise rules are given in sections 7.7 and 10.28. The first time a static variable v is read, it is set to the result of evaluating its initializer. Static variable declarations are initialized lazily. A final variable can only be assigned once, when it is initialized, or a compile-time error occurs.Ī static variable is a variable that is not associated with a particular instance, but rather with an entire library or class. Ī final variable is a variable whose declaration includes the modifier final. InitializedIdentifier (',' initializedIdentifier )*Ī variable that has not been initialized has the initial value null. Variables Variables are storage locations in memory.ĭeclaredIdentifier ('=' expression)? (',' initializedIdentifier )*
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