OperationHandle :: ProvideExpression - Create expression definition

Implementation overview

• Provide operation from BNF tree
  OperationHandle :: ProvideExpression ( dictionary, res_obhandle, obhandle_ref, expr_data )
• - internal feature (not documented)
  OperationHandle :: ProvideExpression ( dictionary, res_obhandle, obhandle_ref, dict_path, file_names )
• Provide operation from in line expression
  OperationHandle :: ProvideExpression ( dictionary, res_obhandle, obhandle_ref, cexpression )

Implementation details

1. Provide operation from BNF tree
   logical OperationHandle  :: ProvideExpression ( DictionaryHandle &dictionary, DBObjectHandle &res_obhandle, DBObjectHandle &obhandle_ref, BNFData *expr_data )
   

   The expression is build from the BNF-tree passed in expr_data.

   • dictionary - Dictionary handle

     The dictionary handle usually refers to an opened dictionary. To check whether a dictionary is opened one may use the !-operator.

   • res_obhandle - Reference to resource database object handle

     The resource database handle usually is a database handle, which is referred to as database object handle.

   • obhandle_ref - Reference to database object handle

     The reference refers to an opened or not opened database object handle.

   • expr_data - BNF-tree for expression
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2. - internal feature (not documented)
   logical OperationHandle  :: ProvideExpression ( DictionaryHandle &dictionary, DBObjectHandle &res_obhandle, DBObjectHandle &obhandle_ref, NPath &dict_path, NPath &file_names )
   

   • dictionary - Dictionary handle

     The dictionary handle usually refers to an opened dictionary. To check whether a dictionary is opened one may use the !-operator.

   • res_obhandle - Reference to resource database object handle

     The resource database handle usually is a database handle, which is referred to as database object handle.

   • obhandle_ref - Reference to database object handle

     The reference refers to an opened or not opened database object handle.

   • dict_path - Complete path to dictionary

     The file path is passed as 0-terminated string. The path may contain option/environment variables enclosed in %...%

   • file_names - File name
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3. Provide operation from in line expression
   logical OperationHandle  :: ProvideExpression ( DictionaryHandle &dictionary, DBObjectHandle &res_obhandle, DBObjectHandle &obhandle_ref, NString &cexpression )
   

   The expression is build from the in line expression passed in expression.

   • dictionary - Dictionary handle

     The dictionary handle usually refers to an opened dictionary. To check whether a dictionary is opened one may use the !-operator.

   • res_obhandle - Reference to resource database object handle

     The resource database handle usually is a database handle, which is referred to as database object handle.

   • obhandle_ref - Reference to database object handle

     The reference refers to an opened or not opened database object handle.

   • cexpression - - Title unknown
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