MRPT  1.9.9
get_env.h
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1 /* +------------------------------------------------------------------------+
2  | Mobile Robot Programming Toolkit (MRPT) |
3  | https://www.mrpt.org/ |
4  | |
5  | Copyright (c) 2005-2019, Individual contributors, see AUTHORS file |
6  | See: https://www.mrpt.org/Authors - All rights reserved. |
7  | Released under BSD License. See: https://www.mrpt.org/License |
8  +------------------------------------------------------------------------+ */
9 
10 #pragma once
11 
12 #include <mrpt/core/from_string.h>
13 #include <cstdlib>
14 
15 namespace mrpt
16 {
17 /** Reads an environment variable, with a default value if not present.
18  * \ingroup mrpt_core_grp
19  */
20 template <class T>
21 inline T get_env(const std::string& varname, const T& defValue = T())
22 {
23  auto s = ::getenv(varname.c_str());
24  if (!s) return defValue;
25  return mrpt::from_string<T>(s, defValue, false /*dont throw*/);
26 }
27 
28 } // namespace mrpt
GLdouble s
Definition: glext.h:3682
T get_env(const std::string &varname, const T &defValue=T())
Reads an environment variable, with a default value if not present.
Definition: get_env.h:21
GLsizei const GLchar ** string
Definition: glext.h:4116
This is the global namespace for all Mobile Robot Programming Toolkit (MRPT) libraries.



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