Namespace Xpath
Class CPathExpr

class CPathExpr: public CExpr {
public:
    CPathExpr(const XExpr &pBaseExpr);
    CPathExpr(bool bAbsolute);
    ~CPathExpr();
public:
    void AddStep(const XStepExpr &pStepExpr);
public:
    XValue Evaluate(const XContext &pContext);
    };

The XPath path expression.

The path expression conforms to to PathExpr syntax specified by XPath.

Since:

1.00.00

Version:

1.00.00

Author:

Alexey Gokhberg

See Also:

CContext, CExpr, CStepExpr

CPathExpr

CPathExpr(const XExpr &pBaseExpr);

Constructs the path expression based on a filter.

This constructor creates the path expression started with the FilterExpr component defined in XPath.

Parameters:

pBaseExpr - the expression representing the FilterExpr component of this path expression

CPathExpr

CPathExpr(bool bAbsolute);

Constructs the path expression based on a location path.

This constructor creates the path expression conforming to the LocationPath syntax defined in XPath.

Returns:

true if the location path of this path expression is absolute; false otherwise

~CPathExpr

~CPathExpr();

Destroys the path expression.

AddStep

void AddStep(const XStepExpr &pStepExpr);

Adds a step expression to this path expression.

Parameters:

pStepExpr - the step expression to add

Evaluate

XValue Evaluate(const XContext &pContext);

Evaluates this path expression.

Parameters:

pContext - the evaluation context

Returns:

the value obtained as the result of evaluation