Result* get_handler( SEXP call, const LazySubsets& subsets ){
int depth = Rf_length(call) ;
HybridHandlerMap& handlers = get_handlers() ;
SEXP fun_symbol = CAR(call) ;
if( TYPEOF(fun_symbol) != SYMSXP ) return 0 ;
HybridHandlerMap::const_iterator it = handlers.find( fun_symbol ) ;
if( it == handlers.end() ) return 0 ;
return it->second( call, subsets, depth - 1 );
}
Result* get_handler(SEXP call, const ILazySubsets& subsets, const Environment& env) {
LOG_INFO << "Looking up hybrid handler for call of type " << type2name(call);
if (TYPEOF(call) == LANGSXP) {
int depth = Rf_length(call);
HybridHandlerMap& handlers = get_handlers();
SEXP fun_symbol = CAR(call);
if (TYPEOF(fun_symbol) != SYMSXP) {
LOG_VERBOSE << "Not a function: " << type2name(fun_symbol);
return 0;
}
LOG_VERBOSE << "Searching hybrid handler for function " << CHAR(PRINTNAME(fun_symbol));
HybridHandlerMap::const_iterator it = handlers.find(fun_symbol);
if (it == handlers.end()) {
LOG_VERBOSE << "Not found";
return 0;
}
LOG_INFO << "Using hybrid handler for " << CHAR(PRINTNAME(fun_symbol));
return it->second(call, subsets, depth - 1);
} else if (TYPEOF(call) == SYMSXP) {
SymbolString name = SymbolString(Symbol(call));
LOG_VERBOSE << "Searching hybrid handler for symbol " << name.get_cstring();
if (subsets.count(name)) {
LOG_VERBOSE << "Using hybrid variable handler";
return variable_handler(subsets, name);
}
else {
SEXP data = env.find(name.get_string());
// Constants of length != 1 are handled via regular evaluation
if (Rf_length(data) == 1) {
LOG_VERBOSE << "Using hybrid constant handler";
return constant_handler(data);
}
}
} else {
// TODO: perhaps deal with SYMSXP separately
if (Rf_length(call) == 1) return constant_handler(call);
}
return 0;
}
Result* get_handler( SEXP call, const LazySubsets& subsets, const Environment& env ){
if( TYPEOF(call) == LANGSXP ){
int depth = Rf_length(call) ;
HybridHandlerMap& handlers = get_handlers() ;
SEXP fun_symbol = CAR(call) ;
if( TYPEOF(fun_symbol) != SYMSXP ) return 0 ;
HybridHandlerMap::const_iterator it = handlers.find( fun_symbol ) ;
if( it == handlers.end() ) return 0 ;
return it->second( call, subsets, depth - 1 );
} else if( TYPEOF(call) == SYMSXP ){
if( !subsets.count(call) ){
SEXP data = env.find( CHAR(PRINTNAME(call)) ) ;
if( Rf_length(data) == 1 ) return constant_handler(data) ;
}
} else {
// TODO: perhaps deal with SYMSXP separately
if( Rf_length(call) == 1 ) return constant_handler(call) ;
}
return 0 ;
}