Adding upstream version 0.17.upstream/0.17

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 35 insertions, 34 deletions

diff --git a/arg_parser.h b/arg_parser.h
index ceb9933..d9a4af0 100644
--- a/arg_parser.h
+++ b/arg_parser.h
@@ -1,43 +1,43 @@
-/*  Arg_parser - POSIX/GNU command line argument parser. (C++ version)
-    Copyright (C) 2006-2019 Antonio Diaz Diaz.
+/* Arg_parser - POSIX/GNU command line argument parser. (C++ version)
+   Copyright (C) 2006-2020 Antonio Diaz Diaz.
 
-    This library is free software. Redistribution and use in source and
-    binary forms, with or without modification, are permitted provided
-    that the following conditions are met:
+   This library is free software. Redistribution and use in source and
+   binary forms, with or without modification, are permitted provided
+   that the following conditions are met:
 
-    1. Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
+   1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions, and the following disclaimer.
 
-    2. Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
+   2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions, and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
 
-    This library 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.
+   This library 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.
 */
 
-/*  Arg_parser reads the arguments in 'argv' and creates a number of
-    option codes, option arguments and non-option arguments.
+/* Arg_parser reads the arguments in 'argv' and creates a number of
+   option codes, option arguments, and non-option arguments.
 
-    In case of error, 'error' returns a non-empty error message.
+   In case of error, 'error' returns a non-empty error message.
 
-    'options' is an array of 'struct Option' terminated by an element
-    containing a code which is zero. A null name means a short-only
-    option. A code value outside the unsigned char range means a
-    long-only option.
+   'options' is an array of 'struct Option' terminated by an element
+   containing a code which is zero. A null name means a short-only
+   option. A code value outside the unsigned char range means a
+   long-only option.
 
-    Arg_parser normally makes it appear as if all the option arguments
-    were specified before all the non-option arguments for the purposes
-    of parsing, even if the user of your program intermixed option and
-    non-option arguments. If you want the arguments in the exact order
-    the user typed them, call 'Arg_parser' with 'in_order' = true.
+   Arg_parser normally makes it appear as if all the option arguments
+   were specified before all the non-option arguments for the purposes
+   of parsing, even if the user of your program intermixed option and
+   non-option arguments. If you want the arguments in the exact order
+   the user typed them, call 'Arg_parser' with 'in_order' = true.
 
-    The argument '--' terminates all options; any following arguments are
-    treated as non-option arguments, even if they begin with a hyphen.
+   The argument '--' terminates all options; any following arguments are
+   treated as non-option arguments, even if they begin with a hyphen.
 
-    The syntax for optional option arguments is '-<short_option><argument>'
-    (without whitespace), or '--<long_option>=<argument>'.
+   The syntax for optional option arguments is '-<short_option><argument>'
+   (without whitespace), or '--<long_option>=<argument>'.
 */
 
 class Arg_parser
@@ -61,6 +61,7 @@ private:
     explicit Record( const char * const arg ) : code( 0 ), argument( arg ) {}
     };
 
+  const std::string empty_arg;
   std::string error_;
   std::vector< Record > data;
 
@@ -73,17 +74,17 @@ public:
   Arg_parser( const int argc, const char * const argv[],
               const Option options[], const bool in_order = false );
 
-      // Restricted constructor. Parses a single token and argument (if any)
+  // Restricted constructor. Parses a single token and argument (if any).
   Arg_parser( const char * const opt, const char * const arg,
               const Option options[] );
 
   const std::string & error() const { return error_; }
 
-      // The number of arguments parsed (may be different from argc)
+  // The number of arguments parsed. May be different from argc.
   int arguments() const { return data.size(); }
 
-      // If code( i ) is 0, argument( i ) is a non-option.
-      // Else argument( i ) is the option's argument (or empty).
+  /* If code( i ) is 0, argument( i ) is a non-option.
+     Else argument( i ) is the option's argument (or empty). */
   int code( const int i ) const
     {
     if( i >= 0 && i < arguments() ) return data[i].code;
@@ -93,6 +94,6 @@ public:
   const std::string & argument( const int i ) const
     {
     if( i >= 0 && i < arguments() ) return data[i].argument;
-    else return error_;
+    else return empty_arg;
     }
   };