CRegExpression class

Pipelines v2.0

 

Member variables, Member functions

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Description

 

The CregExpression class object is used by the ParseForRegExp() function to validate and assign a regular expression that has been extracted from your stage command argument. The format of the regular expression is determined by the Pipelines REGEXP option mode setting. However, this is transparent to the stage designer; the format of an expression only applies to the way it is specified as a stage command argument. The ParseForRegExp() function determines the format automatically; extracts the argument and passes it to the regular expression parser for validation and assignment.

 

Definition

 

The following class definition is an edited version; it details only those members which are accessible and of use to you. In addition; any examples that may be shown are only intended as a demonstration of how certain functions might be used, they do not represent best practice nor do they take into account the scope and de-allocation of class objects.

 

class CRegExpression
{
    public:
 
    RegularExpression m_RegExp;
};

 

Member variables

 

     ●

 
RegularExpression m_RegExp
[in] is the interface to the regular expression parser. 
 

First, you extract the string which specifies the regular expression definition; this will be in the form of a simple delimited character string. Then, you present this string to the regular expression parser for evaluation and assignment. For example:

 

bool CMyStage::Initialise( void )
{
    // Access the manager.
    CStageManager *pManager = Manager();
    // Access my stage.
    CStage *pStage = pManager->GetStage( *this );
 
    ...
 
    // Point to my stage command argument.
    const char *pszArgument = pStage->Argument();
 
    // Perform any preprocessing required.
    if( !pManager->PreProcess( *this, &pszArgument ) )
        return( false );
 
    CString szString;
    CCharacterString *pCharString = new CCharacterString( *this );
 
    pCharString->m_bRequired = true;
    pCharString->m_pszSource = &pszArgument;
    pCharString->m_pszTarget = &szString;
 
    // Extract the regular expression.
    if( !pManager->ParseForCharacterString( pCharString ) )
        return( false );
 
    // Parse and assign the regular expression.
    CRegExpression *pRegExp = new CRegExpression;
    pRegExp->m_RegExp.Expression = szString;
    if( !pManager->ParseForRegExp( *this, pRegExp, !pStage->Casei() ) )
        return( false );
 
    ...
 
    return( true );
}

 

Member functions

 

None.