EvalStatement Class Reference

Evaluate arithmetic expression. More...

#include <eval.h>

Inheritance diagram for EvalStatement:

Collaboration diagram for EvalStatement:

Public Member Functions
	EvalStatement (ExpressionNode *expression)
	~EvalStatement ()
char *	Execute ()
SyntaxNode *	GetNext ()
void	Attach (SyntaxNode *node)
void	Detach (SyntaxNode *node)
void	Replace (SyntaxNode *n, SyntaxNode *x)
Public Member Functions inherited from StatementNode
	StatementNode ()
	StatementNode (const char *text)
virtual	~StatementNode ()
NodeType	GetNodeType ()
virtual char *	GetTextCode ()
Public Member Functions inherited from SyntaxNode
	SyntaxNode ()
virtual	~SyntaxNode ()
void	SetFirstNode ()
bool	GetFirstNode () const
SyntaxNode *	GetParent () const
void	SetParent (SyntaxNode *node)
virtual ReductionType	GetReductionType ()
virtual void	ResetIterator ()

Private Attributes
ExpressionNode *	expression

Additional Inherited Members
Protected Attributes inherited from StatementNode
char *	statementText
Protected Attributes inherited from SyntaxNode
CharBuffer *	output
SyntaxNode *	parent
SyntaxNode *	iterator
bool	leftBottom

Detailed Description

Evaluate arithmetic expression.

Definition at line 39 of file eval.h.

Constructor & Destructor Documentation

EvalStatement()

EvalStatement::EvalStatement ( ExpressionNode *  expression )

explicit

Definition at line 35 of file eval.cpp.

References expression, and StatementNode::StatementNode().

Referenced by Parser::ParseEvaluation(), and Parser::ParseStatement().

                                                       :
    StatementNode(), expression(expression)
{
}

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~EvalStatement()

EvalStatement::~EvalStatement

(

)

Definition at line 40 of file eval.cpp.

References expression.

{
    if (expression != nullptr)
    {
        delete expression;
    }
}

Member Function Documentation

Attach()

void EvalStatement::Attach ( SyntaxNode *  node )

virtual

Reimplemented from StatementNode.

Definition at line 83 of file eval.cpp.

References expression, and SyntaxNode::SetParent().

{
    if (expression == nullptr)
    {
        expression = static_cast<ExpressionNode*>(node);
        node->SetParent(this);
    }
}

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Detach()

void EvalStatement::Detach ( SyntaxNode *  node )

virtual

Reimplemented from StatementNode.

Definition at line 92 of file eval.cpp.

References expression.

{
    if (expression == node)
    {
        expression = nullptr;
    }
}

Execute()

char * EvalStatement::Execute ( )

virtual

Implements StatementNode.

Definition at line 48 of file eval.cpp.

References CharBuffer::Append(), Number::Clone(), CharBuffer::Empty(), CharBuffer::EnsureSize(), ExpressionNode::Evaluate(), expression, CharBuffer::GetString(), NumeralSystem::GetText(), ExpressionNode::GetText(), Program::Output, SyntaxNode::output, Program::SetLastResult(), and StrLen().

{
    Number* result = expression->Evaluate();
    Number* temp = result->Clone();
    const char* text = expression->GetText();
    const char* val = Program->Output->GetText(result);

    Program->SetLastResult(temp);
    delete temp;

    output->Empty();
    output->EnsureSize(
        StrLen(text) + 3 +
        StrLen(val) +
        StrLen(NEWLINE) + 1);

    output->Append(text);
    output->Append(" = ");
    output->Append(val);
    output->Append(NEWLINE);

    return output->GetString();
}

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GetNext()

SyntaxNode * EvalStatement::GetNext ( )

virtual

Reimplemented from StatementNode.

Definition at line 72 of file eval.cpp.

References expression, and SyntaxNode::iterator.

{
    if (iterator == nullptr)
    {
        iterator = expression;
        return iterator;
    }

    return nullptr;
}

Replace()

void EvalStatement::Replace ( SyntaxNode *  n, SyntaxNode *  x  )

virtual

Reimplemented from StatementNode.

Definition at line 100 of file eval.cpp.

References expression.

{
    if (expression == n)
    {
        delete expression;
        expression = static_cast<ExpressionNode*>(x);
    }
}

Member Data Documentation

expression

ExpressionNode* EvalStatement::expression

private

Definition at line 52 of file eval.h.

Referenced by Attach(), Detach(), EvalStatement(), Execute(), GetNext(), Replace(), and ~EvalStatement().

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The documentation for this class was generated from the following files:

• src/main/statement/eval.h
• src/main/statement/eval.cpp