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annotate libinterp/interp-core/defun-int.h @ 15398:2e5ba861898f

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default arg values for DEFUN functions * defun-int.h (DECLARE_FUNXX, DECLARE_FUNX_NO_DEFAULTS, DECLARE_FUN_NO_DEFAULTS): New macros. (DECLARE_FUNX): Define using DECLARE_FUNXX. Provide default argument values. * defun-dld.h (DEFUN_DLD, DEFUNX_DLD): Use DECLARE_FUNX_NO_DEFAULTS instead of DECLARE_FUNX.
author John W. Eaton <jwe@octave.org>
date Mon, 17 Sep 2012 22:35:38 -0400
parents 2fc554ffbc28
children cd6ce11b9c57
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1 /*
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2
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72c96de7a403 maint: update copyright notices for 2012
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3 Copyright (C) 1994-2012 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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21 */
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22
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23 #if !defined (octave_defun_int_h)
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24 #define octave_defun_int_h 1
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25
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26 #include <string>
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27
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28 #include "ov-builtin.h"
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29 #include "ov-dld-fcn.h"
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30 #include "symtab.h"
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31 #include "version.h"
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32
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33 class octave_value;
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34
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35 extern OCTINTERP_API void print_usage (void);
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36 extern OCTINTERP_API void print_usage (const std::string&);
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37
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38 extern OCTINTERP_API void check_version (const std::string& version, const std::string& fcn);
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40 extern OCTINTERP_API void
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41 install_builtin_function (octave_builtin::fcn f, const std::string& name,
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42 const std::string& file, const std::string& doc,
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43 bool can_hide_function = true);
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44
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45 extern OCTINTERP_API void
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46 install_dld_function (octave_dld_function::fcn f, const std::string& name,
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47 const octave_shlib& shl, const std::string& doc,
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48 bool relative = false);
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50 extern OCTINTERP_API void
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51 install_mex_function (void *fptr, bool fmex, const std::string& name,
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52 const octave_shlib& shl, bool relative = false);
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54 extern OCTINTERP_API void
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55 alias_builtin (const std::string& alias, const std::string& name);
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56
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57 // Gets the shlib of the currently executing DLD function, if any.
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58 extern OCTINTERP_API octave_shlib
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59 get_current_shlib (void);
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60
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61 // This is a convenience class that calls the above function automatically at
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62 // construction time. When deriving new classes, you can either use it as a field
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63 // or as a parent (with multiple inheritance).
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64
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65 class octave_auto_shlib : public octave_shlib
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66 {
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67 public:
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68 octave_auto_shlib (void)
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69 : octave_shlib (get_current_shlib ()) { }
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70 octave_auto_shlib (const octave_shlib& shl)
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71 : octave_shlib (shl) { }
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72 };
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73
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74 extern OCTINTERP_API bool
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75 defun_isargout (int, int);
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76
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77 extern OCTINTERP_API void
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78 defun_isargout (int, int, bool *);
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79
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80 #define DECLARE_FUNXX(name, args_decl, nargout_decl) \
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81 OCTAVE_EXPORT octave_value_list name (args_decl, nargout_decl)
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82
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83 #define DECLARE_FUNX(name, args_name, nargout_name) \
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84 DECLARE_FUNXX (name, \
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85 const octave_value_list& args_name = octave_value_list (), \
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86 int nargout_name = 0)
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87
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88 #define DECLARE_FUNX_NO_DEFAULTS(name, args_name, nargout_name) \
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89 DECLARE_FUNXX (name, const octave_value_list& args_name, int nargout_name)
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90
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91 #define DECLARE_FUN(name, args_name, nargout_name) \
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92 DECLARE_FUNX (F ## name, args_name, nargout_name)
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93
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94 #define DECLARE_FUN_NO_DEFAULTS(name, args_name, nargout_name) \
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95 DECLARE_FUNX_NO_DEFAULTS (F ## name, args_name, nargout_name)
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96
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97 // Define the code that will be used to insert the new function into
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98 // the symbol table. We look for this name instead of the actual
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99 // function so that we can easily install the doc std::string too.
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100
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101 typedef bool (*octave_dld_fcn_installer) (const octave_shlib&, bool relative);
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102
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103 typedef octave_function * (*octave_dld_fcn_getter) (const octave_shlib&, bool relative);
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104
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105 #define DEFINE_FUN_INSTALLER_FUN(name, doc) \
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106 DEFINE_FUNX_INSTALLER_FUN(#name, F ## name, G ## name, doc)
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107
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108 #define DEFINE_FUNX_INSTALLER_FUN(name, fname, gname, doc) \
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109 extern "C" \
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110 OCTAVE_EXPORT \
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111 octave_function * \
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112 gname (const octave_shlib& shl, bool relative) \
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113 { \
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114 octave_function *retval = 0; \
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115 \
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116 check_version (OCTAVE_API_VERSION, name); \
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117 \
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118 if (! error_state) \
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119 { \
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120 octave_dld_function *fcn = octave_dld_function::create (fname, shl, name, doc); \
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121 \
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122 if (relative) \
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123 fcn->mark_relative (); \
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124 \
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125 retval = fcn; \
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126 } \
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127 \
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128 return retval; \
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129 }
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130
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131 // MAKE_BUILTINS is defined to extract function names and related
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132 // information and create the *.df files that are eventually used to
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133 // create the builtins.cc file.
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134
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135 #if defined (MAKE_BUILTINS)
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136
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137 // Generate code to install name in the symbol table. The script
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138 // mkdefs will create a .def file for every .cc file that uses DEFUN,
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139 // or DEFCMD.
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140
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141 #define DEFUN_INTERNAL(name, args_name, nargout_name, doc) \
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142 BEGIN_INSTALL_BUILTIN \
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143 XDEFUN_INTERNAL (name, args_name, nargout_name, doc) \
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144 END_INSTALL_BUILTIN
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145
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146 #define DEFCONSTFUN_INTERNAL(name, args_name, nargout_name, doc) \
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147 BEGIN_INSTALL_BUILTIN \
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148 XDEFCONSTFUN_INTERNAL (name, args_name, nargout_name, doc) \
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149 END_INSTALL_BUILTIN
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150
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151 #define DEFUNX_INTERNAL(name, fname, args_name, nargout_name, doc) \
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152 BEGIN_INSTALL_BUILTIN \
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153 XDEFUNX_INTERNAL (name, fname, args_name, nargout_name, doc) \
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154 END_INSTALL_BUILTIN
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155
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156 // Generate code to install name in the symbol table. The script
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157 // mkdefs will create a .def file for every .cc file that uses
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158 // DEFUN_DLD.
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159
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160 #define DEFUN_DLD_INTERNAL(name, args_name, nargout_name, doc) \
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161 BEGIN_INSTALL_BUILTIN \
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162 XDEFUN_DLD_INTERNAL (name, args_name, nargout_name, doc) \
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163 END_INSTALL_BUILTIN
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164
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165 #define DEFUNX_DLD_INTERNAL(name, fname, args_name, nargout_name, doc) \
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166 BEGIN_INSTALL_BUILTIN \
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167 XDEFUNX_DLD_INTERNAL (name, fname, args_name, nargout_name, doc) \
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168 END_INSTALL_BUILTIN
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169
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170 // Generate code for making another name for an existing function.
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171
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172 #define DEFALIAS_INTERNAL(alias, name) \
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173 BEGIN_INSTALL_BUILTIN \
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174 XDEFALIAS_INTERNAL(alias, name) \
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175 END_INSTALL_BUILTIN
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176
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177 #else /* ! MAKE_BUILTINS */
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178
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179 // Generate the first line of the function definition. This ensures
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180 // that the internal functions all have the same signature.
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181
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182 #define DEFUN_INTERNAL(name, args_name, nargout_name, doc) \
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183 DECLARE_FUN (name, args_name, nargout_name)
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184
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185 #define DEFCONSTFUN_INTERNAL(name, args_name, nargout_name, doc) \
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186 DECLARE_FUN (name, args_name, nargout_name)
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187
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188 #define DEFUNX_INTERNAL(name, fname, args_name, nargout_name, doc) \
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189 DECLARE_FUNX (fname, args_name, nargout_name)
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190
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191 // No definition is required for an alias.
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192
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193 #define DEFALIAS_INTERNAL(alias, name)
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194
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195 #endif /* ! MAKE_BUILTINS */
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196
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197 #endif