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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// outer.h: Rcpp R/C++ interface class library -- outer
//
// Copyright (C) 2010 - 2024 Dirk Eddelbuettel and Romain Francois
// Copyright (C) 2025 Dirk Eddelbuettel, Romain Francois and Iñaki Ucar
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp__sugar__outer_h
#define Rcpp__sugar__outer_h
namespace Rcpp{
namespace sugar{
template <int RTYPE,
bool LHS_NA, typename LHS_T,
bool RHS_NA, typename RHS_T,
typename Function >
class Outer : public MatrixBase<
Rcpp::traits::r_sexptype_traits<
typename ::Rcpp::traits::result_of<Function, LHS_T, RHS_T>::type
>::rtype ,
true ,
Outer<RTYPE,LHS_NA,LHS_T,RHS_NA,RHS_T,Function>
> {
public:
typedef typename ::Rcpp::traits::result_of<Function, LHS_T, RHS_T>::type result_type ;
const static int RESULT_R_TYPE =
Rcpp::traits::r_sexptype_traits<result_type>::rtype ;
typedef Rcpp::VectorBase<RTYPE,LHS_NA,LHS_T> LHS_TYPE ;
typedef Rcpp::VectorBase<RTYPE,RHS_NA,RHS_T> RHS_TYPE ;
typedef Rcpp::internal::LazyVector<LHS_TYPE> LHS_LAZY ;
typedef Rcpp::internal::LazyVector<RHS_TYPE> RHS_LAZY ;
typedef typename Rcpp::traits::r_vector_element_converter<RESULT_R_TYPE>::type converter_type ;
typedef typename Rcpp::traits::storage_type<RESULT_R_TYPE>::type STORAGE ;
Outer( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_, Function fun_ ) :
lhs(lhs_), rhs(rhs_), fun(fun_), nr(lhs_.size()), nc(rhs_.size()) {}
inline STORAGE operator()( int i, int j ) const {
return converter_type::get( fun( lhs[i], rhs[j] ) );
}
inline R_xlen_t size() const { return static_cast<R_xlen_t>(nr) * nc ; }
inline int nrow() const { return nr; }
inline int ncol() const { return nc; }
private:
LHS_LAZY lhs ;
RHS_LAZY rhs ;
Function fun ;
int nr, nc ;
} ;
} // sugar
template <int RTYPE,
bool LHS_NA, typename LHS_T,
bool RHS_NA, typename RHS_T,
typename Function >
inline sugar::Outer<RTYPE,LHS_NA,LHS_T,RHS_NA,RHS_T,Function>
outer(
const Rcpp::VectorBase<RTYPE,LHS_NA,LHS_T>& lhs,
const Rcpp::VectorBase<RTYPE,RHS_NA,RHS_T>& rhs,
Function fun ){
return sugar::Outer<RTYPE,LHS_NA,LHS_T,RHS_NA,RHS_T,Function>( lhs, rhs, fun ) ;
}
} // Rcpp
#endif
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