Rcpp Version 0.12.12
lower_tri.h
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1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 //
3 // lower_tri.h: Rcpp R/C++ interface class library -- lower.tri
4 //
5 // Copyright (C) 2010 - 2017 Dirk Eddelbuettel and Romain Francois
6 // Copyright (C) 2017 Dirk Eddelbuettel, Romain Francois, and Nathan Russell
7 //
8 // This file is part of Rcpp.
9 //
10 // Rcpp is free software: you can redistribute it and/or modify it
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22 
23 #ifndef Rcpp__sugar__lower_tri_h
24 #define Rcpp__sugar__lower_tri_h
25 
26 namespace Rcpp {
27 namespace sugar {
28 
29 template <int RTYPE, bool NA, typename T>
30 class LowerTri : public MatrixBase<LGLSXP, false, LowerTri<RTYPE, NA, T> > {
31 public:
33 
34  LowerTri(const T& lhs, bool diag)
35  : nr(lhs.nrow()),
36  nc(lhs.ncol()),
38  {}
39 
40  inline int operator()(int i, int j) const { return get(i, j); }
41 
42  inline R_xlen_t size() const { return static_cast<R_xlen_t>(nr) * nc; }
43  inline int nrow() const { return nr; }
44  inline int ncol() const { return nc; }
45 
46 private:
47  typedef bool (LowerTri::*Method)(int, int) const;
48 
49  int nr, nc;
51 
52  inline bool get_diag_true(int i, int j) const { return i >= j; }
53 
54  inline bool get_diag_false(int i, int j) const { return i > j; }
55 
56  inline bool get(int i, int j) const { return (this->*getter)(i, j); }
57 };
58 
59 } // sugar
60 
61 template <int RTYPE, bool NA, typename T>
63 lower_tri(const Rcpp::MatrixBase<RTYPE, NA, T>& lhs, bool diag = false) {
65 }
66 
67 } // Rcpp
68 
69 #endif // Rcpp__sugar__lower_tri_h
Rcpp::MatrixBase< RTYPE, NA, T > MatBase
Definition: lower_tri.h:32
sugar::LowerTri< RTYPE, NA, T > lower_tri(const Rcpp::MatrixBase< RTYPE, NA, T > &lhs, bool diag=false)
Definition: lower_tri.h:63
bool(LowerTri::* Method)(int, int) const
Definition: lower_tri.h:47
sugar::diag_result_type_trait< T >::type diag(const T &t)
Definition: diag.h:83
bool get_diag_true(int i, int j) const
Definition: lower_tri.h:52
int nrow() const
Definition: lower_tri.h:43
bool get_diag_false(int i, int j) const
Definition: lower_tri.h:54
int ncol() const
Definition: lower_tri.h:44
Rcpp API.
Definition: algo.h:28
R_xlen_t size() const
Definition: lower_tri.h:42
int operator()(int i, int j) const
Definition: lower_tri.h:40
LowerTri(const T &lhs, bool diag)
Definition: lower_tri.h:34