com.whitestein.lsps.lang

Class FunctionArgumentInterpreter

java.lang.Object

com.whitestein.lsps.lang.FunctionArgumentInterpreter

public class FunctionArgumentInterpreter
extends Object

This class interprets function arguments. Variadic arguments are returned either as a Java array or as a ListHolder.

Author:

rba

Constructor Summary

Constructors

Constructor and Description
FunctionArgumentInterpreter(FunctionSignature signature) Creates new instance.

Method Summary

Modifier and Type	Method and Description
Namespace	createFunctionNamespace(Interpreter interpreter, List<Expression> arguments, boolean variadicAsList, InterpreterStackTrace stackTrace) Creates a function namespace that is a child of the interpreter namespace for the given function arguments.
Object[]	interpret(Interpreter interpreter, List<Expression> arguments, boolean variadicAsArray, boolean variadicArgAsList, InterpreterStackTrace stackTrace) Interprets the given arguments with proper variadic argument handling.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FunctionArgumentInterpreter

public FunctionArgumentInterpreter(FunctionSignature signature)

Creates new instance.

Parameters:

signature -

Method Detail

interpret

public Object[] interpret(Interpreter interpreter,
                          List<Expression> arguments,
                          boolean variadicAsArray,
                          boolean variadicArgAsList,
                          InterpreterStackTrace stackTrace)
                   throws ErrorException

Interprets the given arguments with proper variadic argument handling.

Parameters:

interpreter -

arguments -

variadicAsArray - if true then the variadic arguments are returned as a Java array, otherwise as a ListHolder

variadicArgAsList - if true, the variadic argument is given as an expression returning a list; if false, the variadic argument is given as several individual expressions

stackTrace -

Returns:

the interpreted arguments

Throws:

ErrorException

createFunctionNamespace

public Namespace createFunctionNamespace(Interpreter interpreter,
                                         List<Expression> arguments,
                                         boolean variadicAsList,
                                         InterpreterStackTrace stackTrace)
                                  throws ErrorException

Creates a function namespace that is a child of the interpreter namespace for the given function arguments.

Parameters:

interpreter -

arguments -

variadicAsList -

stackTrace - a stack trace

Returns:

the function namespace

Throws:

ErrorException