EnvBaseVisitor<T> class

This class provides an empty implementation of EnvVisitor, which can be extended to create a visitor which only needs to handle a subset of the available methods.

T is the return type of the visit operation. Use void for operations with no return type.

Implemented types
Implementers

Constructors

EnvBaseVisitor()

Properties

hashCode int
The hash code for this object.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited

Methods

aggregateResult(T? aggregate, T? nextResult) → T?
Aggregates the results of visiting multiple children of a node. After either all children are visited or {@link #shouldVisitNextChild} returns false, the aggregate value is returned as the result of {@link #visitChildren}.
inherited
defaultResult() → T?
Gets the default value returned by visitor methods. This value is returned by the default implementations of {@link #visitTerminal visitTerminal}, {@link #visitErrorNode visitErrorNode}. The default implementation of {@link #visitChildren visitChildren} initializes its aggregate result to this value.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
shouldVisitNextChild(RuleNode node, T? currentResult) bool
This method is called after visiting each child in {@link #visitChildren}. This method is first called before the first child is visited; at that point currentResult will be the initial value (in the default implementation, the initial value is returned by a call to {@link #defaultResult}. This method is not called after the last child is visited.
inherited
toString() String
A string representation of this object.
inherited
visit(ParseTree tree) → T?
{@inheritDoc}
inherited
visitChildren(RuleNode node) → T?
{@inheritDoc}
inherited
visitComment(CommentContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override
visitEnv(EnvContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override
visitErrorNode(ErrorNode node) → T?
{@inheritDoc}
inherited
visitKey(KeyContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override
visitLine(LineContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override
visitString(StringContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override
visitTerminal(TerminalNode node) → T?
{@inheritDoc}
inherited
visitValue(ValueContext ctx) → T?
The default implementation returns the result of calling visitChildren on ctx.
override

Operators

operator ==(Object other) bool
The equality operator.
inherited