com.wewebu.expression.language
Class OwExprArgumentsSuffix

java.lang.Object
  com.wewebu.expression.language.OwExprExpression
      com.wewebu.expression.language.OwExprArgumentsSuffix

All Implemented Interfaces:

OwExprPrimaryPrefix

public class OwExprArgumentsSuffix
extends OwExprExpression
implements OwExprPrimaryPrefix

An function arguments suffix of a primary expression.
In the expression function(2,3,'sss') the (2,3,'sss') arguments will be parsed into an OwExprArgumentsSuffix. At evaluation time the function function symbol will be used to perform a function call with the designated arguments.

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Field Summary

Fields inherited from class com.wewebu.expression.language.OwExprExpression

m_errorTable, m_symbolTable, m_typeError

Constructor Summary

OwExprArgumentsSuffix(OwExprSymbolTable symbolTable_p, OwExprErrorTable errorTable_p, OwExprPrimaryPrefix prefix_p, List argumentsExpressions_p)
Constructor

Method Summary

OwExprValue	evaluate(OwExprScope scope_p) Evaluates this expression on the OwExprScope (scope) provided as argument.
OwExprExpression	expression() The prefix of this expression is forced to function.
OwExprFunctionSymbol	regressToFunction() Function on function call is not allowed. (egg.
OwExprPropertySymbol	regressToPorperty() Function on property call is not allowed.
OwExprSymbolScope	regressToScope() Forces this primary prefix to a scope symbol. It also forces the m_prefix primary prefix to a function call.
String	toString()
OwExprExpressionType	type() Type check method.The type of the function symbol is considered - m_functionSymbol.

Methods inherited from class com.wewebu.expression.language.OwExprExpression

errCount, evaluate, evaluate, getErrorTable, getSymbol, getSymbolTable, hasErrors, initType, symbolsVisibleInScopes

Methods inherited from class java.lang.Object

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

Constructor Detail

OwExprArgumentsSuffix

public OwExprArgumentsSuffix(OwExprSymbolTable symbolTable_p,
                             OwExprErrorTable errorTable_p,
                             OwExprPrimaryPrefix prefix_p,
                             List argumentsExpressions_p)

Constructor

Parameters:

symbolTable_p - global symbol table

errorTable_p - global error table

prefix_p - the primary prefix

argumentsExpressions_p - list of arguments as OwExprExpressions

Method Detail

evaluate

public OwExprValue evaluate(OwExprScope scope_p)
                     throws OwExprEvaluationException

Evaluates this expression on the OwExprScope (scope) provided as argument.
First the arguments are evaluated.
Than the function value is obtained using OwExprFunctionSymbol.getValue(OwExprScope, OwExprValue[])

Specified by:

evaluate in class OwExprExpression

Parameters:

scope_p - scope to be used during evaluation

Returns:

the value resulted from the evaluation of this function

Throws:

OwExprEvaluationException

type

public OwExprExpressionType type()
                          throws OwExprTypeMissmatchException

Type check method.The type of the function symbol is considered - m_functionSymbol. If type errors are encountered during type computation the OwExprExpression.m_typeError should be set to true

Specified by:

type in class OwExprExpression

Returns:

the expression type for this expression

Throws:

OwExprTypeMissmatchException - if type errors are ecountrede during type computation

expression

public OwExprExpression expression()

The prefix of this expression is forced to function.

Specified by:

expression in interface OwExprPrimaryPrefix

Returns:

the expression represented by this primary prefix

regressToFunction

public OwExprFunctionSymbol regressToFunction()
                                       throws OwExprTypeMissmatchException

Function on function call is not allowed.
(egg. aFunction(1,2)(3,4)).

Specified by:

regressToFunction in interface OwExprPrimaryPrefix

Returns:

the function symbol of this expression

Throws:

OwExprTypeMissmatchException - always

regressToPorperty

public OwExprPropertySymbol regressToPorperty()
                                       throws OwExprTypeMissmatchException

Function on property call is not allowed.
(egg. aFunction.(1,2)).

Specified by:

regressToPorperty in interface OwExprPrimaryPrefix

Returns:

the property symbol of this expression

Throws:

OwExprTypeMissmatchException - always

regressToScope

public OwExprSymbolScope regressToScope()
                                 throws OwExprTypeMissmatchException

Forces this primary prefix to a scope symbol.
It also forces the m_prefix primary prefix to a function call. (egg. aFunction(1,2).aProperty)

Specified by:

regressToScope in interface OwExprPrimaryPrefix

Returns:

the scope symbol of this function expression

Throws:

OwExprTypeMissmatchException

toString

public String toString()

Overrides:

toString in class Object