Mercurial > octave
view liboctave/util/lo-traits.h @ 21139:538b57866b90
consistently use "typename" intead of "class" in template declarations
* Object.h, QtHandlesUtils.cc, QtHandlesUtils.h, ToolBarButton.cc,
ToolBarButton.h, Cell.h, __lin_interpn__.cc, bitfcns.cc, bsxfun.cc,
cellfun.cc, data.cc, filter.cc, gcd.cc, graphics.cc, help.cc, kron.cc,
lookup.cc, ls-mat5.cc, ls-oct-text.h, lu.cc, max.cc, mgorth.cc,
oct-map.cc, oct-map.h, oct-stream.cc, oct-stream.h, octave-link.h,
pr-output.cc, profiler.h, schur.cc, sparse-xdiv.cc, sparse-xpow.cc,
sqrtm.cc, symtab.h, tril.cc, typecast.cc, variables.cc, xdiv.cc,
zfstream.h, __init_fltk__.cc, __magick_read__.cc, chol.cc, qr.cc,
ov-base-diag.cc, ov-base-diag.h, ov-base-int.cc, ov-base-int.h,
ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-scalar.h,
ov-base-sparse.cc, ov-base-sparse.h, ov-base.h, ov-classdef.cc,
ov-int-traits.h, ov-java.h, ov-usr-fcn.h, ov.cc, ov.h,
op-dms-template.cc, oct-parse.in.yy, parse.h, pt-mat.cc, Array-b.cc,
Array.cc, Array.h, CDiagMatrix.h, CMatrix.h, CNDArray.h,
DiagArray2.cc, DiagArray2.h, MArray.cc, MArray.h, MDiagArray2.cc,
MDiagArray2.h, MSparse.cc, MSparse.h, MatrixType.cc, Sparse.cc,
Sparse.h, dDiagMatrix.h, dMatrix.h, dNDArray.h, fCDiagMatrix.h,
fCMatrix.h, fCNDArray.h, fDiagMatrix.h, fMatrix.h, fNDArray.h,
idx-vector.cc, idx-vector.h, intNDArray.cc, intNDArray.h, DET.h,
base-aepbal.h, base-lu.cc, base-lu.h, base-qr.cc, base-qr.h,
bsxfun-defs.cc, eigs-base.cc, lo-mappers.h, lo-specfun.cc,
lo-specfun.h, oct-convn.cc, oct-fftw.cc, oct-norm.cc,
sparse-base-chol.cc, sparse-base-chol.h, sparse-base-lu.cc,
sparse-base-lu.h, sparse-dmsolve.cc, mx-inlines.cc,
action-container.h, base-list.h, lo-traits.h, lo-utils.h,
oct-base64.h, oct-binmap.h, oct-cmplx.h, oct-inttypes.cc,
oct-inttypes.h, oct-locbuf.h, oct-refcount.h, oct-sort.cc, oct-sort.h:
Use "typename" instead of "class" in template declarations.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Sun, 24 Jan 2016 13:50:04 -0500 |
parents | f7084eae3318 |
children | 1473547f50f5 |
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/* Copyright (C) 2009-2015 John W. Eaton This file is part of Octave. Octave 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 3 of the License, or (at your option) any later version. Octave 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 Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if ! defined (octave_lo_traits_h) #define octave_lo_traits_h 1 // Ideas for these classes taken from C++ Templates, The Complete // Guide by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley // (2003). // Select a type based on the value of a constant expression. template <bool cond, typename T1, typename T2> class if_then_else; template <typename T1, typename T2> class if_then_else<true, T1, T2> { public: typedef T1 result; }; template <typename T1, typename T2> class if_then_else<false, T1, T2> { public: typedef T2 result; }; // Determine whether two types are equal. template <typename T1, typename T2> class equal_types { public: static const bool value = false; }; template <typename T> class equal_types <T, T> { public: static const bool value = true; }; // Determine whether a type is an instance of a template. template <template <typename> class Template, typename T> class is_instance { public: static const bool value = false; }; template <template <typename> class Template, typename T> class is_instance <Template, Template<T> > { public: static const bool value = true; }; // Determine whether a template paramter is a class type. template <typename T1> class is_class_type { private: typedef char one; typedef struct { char c[2]; } two; // Classes can have pointers to members. template <typename T2> static one is_class_type_test (int T2::*); // Catch everything else. template <typename T2> static two is_class_type_test (...); public: enum { yes = sizeof (is_class_type_test<T1> (0)) == 1 }; enum { no = ! yes }; }; // Define typename ref_param<T>::type as T const& if T is a class // type. Otherwise, define it to be T. template <typename T> class ref_param { public: typedef typename if_then_else<is_class_type<T>::no, T, T const&>::result type; }; // Will turn TemplatedClass<T> to T, leave T otherwise. // Useful for stripping wrapper classes, like octave_int. template <template <typename> class TemplatedClass, typename T> class strip_template_param { public: typedef T type; }; template <template <typename> class TemplatedClass, typename T> class strip_template_param<TemplatedClass, TemplatedClass<T> > { public: typedef T type; }; // Will turn TemplatedClass<T> to TemplatedClass<S>, T to S otherwise. // Useful for generic promotions. template <template <typename> class TemplatedClass, typename T, typename S> class subst_template_param { public: typedef S type; }; template <template <typename> class TemplatedClass, typename T, typename S> class subst_template_param<TemplatedClass, TemplatedClass<T>, S> { public: typedef TemplatedClass<S> type; }; #endif