DictionaryHandle :: CheckExpression - Check expression syntax

Implementation overview

• Check ad hoc expression
  DictionaryHandle :: CheckExpression ( cexpression, obhandle_refc, clsnames )
• Check class expression
  DictionaryHandle :: CheckExpression ( obhandle_refc, clsnames, exprnames, implnames )
• - internal feature (not documented)
  DictionaryHandle :: CheckExpression ( cexpression, obhandle_refc )

Implementation details

1. Check ad hoc expression
   logical DictionaryHandle  :: CheckExpression ( NString &cexpression, DBObjectHandle &obhandle_refc, NString &clsnames )
   

   This function checks an ad hoc expression, which has been created or defined in the application.

   • cexpression - - Title unknown
   • obhandle_refc - Constant reference to database object handle

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

   • clsnames - Class name

     sys_ident of a ODC_ImpClass , used to create a TypeKey in conjunction with nsid

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2. Check class expression
   logical DictionaryHandle  :: CheckExpression ( DBObjectHandle &obhandle_refc, NString &clsnames, NString &exprnames, NString &implnames )
   

   The function checks an expression defined in a implementation class resource ( ODC_ImpClass ).

   • obhandle_refc - Constant reference to database object handle

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

   • clsnames - Class name

     sys_ident of a ODC_ImpClass , used to create a TypeKey in conjunction with nsid

   • exprnames - Expression name
   • implnames - Implementation name
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3. - internal feature (not documented)
   logical DictionaryHandle  :: CheckExpression ( NString &cexpression, DBObjectHandle &obhandle_refc )
   

   • cexpression - - Title unknown
   • obhandle_refc - Constant reference to database object handle

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

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