Function intersectSources

src/ast/ast_derive_alias.cpp:226–238

    }

    Variable * intersectSources ( ExpressionSources & a, ExpressionSources & b ) {
        if ( a.size() < b.size() ) {
            for ( auto va : a ) {
                if ( b.find(va)!=b.end() ) return va;
            }
            return nullptr;
        } else {
            for ( auto vb : b ) {
                if ( a.find(vb)!=a.end() ) return vb;
            }
            return nullptr;
        }
    }

    void deriveAliasing ( const FunctionPtr & func, TextWriter & logs, bool logAliasing ) {
        if ( func->arguments.size()==0 && func->useGlobalVariables.size()==0 && func->useFunctions.size()==0 ) return;