org.scijava.parsington.eval

Interface TreeEvaluator

All Superinterfaces:

Evaluator

All Known Subinterfaces:

StandardTreeEvaluator

All Known Implementing Classes:

DefaultTreeEvaluator

public interface TreeEvaluator
extends Evaluator

Interface for tree-based expression evaluators, operating on syntax trees.

Author:

Curtis Rueden

Method Summary

Modifier and Type	Method and Description
default Object	evaluate(LinkedList<Object> queue) Evaluates a postfix token queue.
default Object	evaluate(String expression) Evaluates an infix expression.
default Object	evaluate(SyntaxTree syntaxTree) Evaluates a syntax tree.
Object	execute(Operator op, SyntaxTree tree) Executes an operation on the specified syntax tree's children.

Methods inherited from interface org.scijava.parsington.eval.Evaluator

get, get, getParser, isStrict, set, set, setAll, setStrict, value, var

Method Detail

execute

Object execute(Operator op,
               SyntaxTree tree)

Executes an operation on the specified syntax tree's children.

Parameters:

op - The operator to execute.

tree - The syntax tree containing the arguments to pass.

Returns:

The result of the operation.

evaluate

default Object evaluate(String expression)

Description copied from interface: Evaluator

Evaluates an infix expression.

Specified by:

evaluate in interface Evaluator

Parameters:

expression - The infix expression to evaluate.

Returns:

The result of the evaluation.

evaluate

default Object evaluate(LinkedList<Object> queue)

Description copied from interface: Evaluator

Evaluates a postfix token queue.

Specified by:

evaluate in interface Evaluator

Parameters:

queue - The postfix token queue to evaluate.

Returns:

The result of the evaluation.

evaluate

default Object evaluate(SyntaxTree syntaxTree)

Description copied from interface: Evaluator

Evaluates a syntax tree.

Specified by:

evaluate in interface Evaluator

Parameters:

syntaxTree - The syntax tree to evaluate.

Returns:

The result of the evaluation.