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virtual bool BuildExpressions(unsigned int atomopts, unsigned int bondopts)
This method builds query expressions for the atoms and bonds contained in a query molecule instance. Any pre-existing query expressions are destroyed by this method. The bits in the unsigned integers passed to the method define how query expressions will be built based on the attributes of each atom and bond instance. The bitwise options are stored in the OEExprOpts namespace. Please refer to (Section 8.4) for a complete explanation of the query options. This method provides the ability to convert attributes of base atoms and bonds to query expressions that are consistent with the semantics desired for a graph match procedure. Each requested expression is constructed, using data from the parent atom or bond if necessary. During a graph match procedure, the resulting expression composition will be used to evaluate atom and bond graph component equivalences.
It is important to note that BuildExpressions uses the data present in a query molecule only when it is called. Subsequent modifications to atom and bond data to not cause the expressions to be updated to reflect changes. An additional call to BuildExpressions must be made to synchronize expressions with atom and bond data.
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