Update example code and readme for string parsing

README.md

@@ -75,6 +75,16 @@ To parse the command line do:
 auto result = options.parse(argc, argv);
 ```
 
+Or if you have all the arguments of `argv` in a `std::string`, separated by
+white spaces, do:
+
+```cpp
+auto result = options.parse(argv_str);
+```
+
+Note the support for string parsing is limited. No bash variable replacement and
+wild card expansion.
+
 To retrieve an option use `result.count("option")` to get the number of times
 it appeared, and
 

src/example.cpp

@@ -27,7 +27,7 @@ THE SOFTWARE.
 #include "cxxopts.hpp"
 
 void
-parse(int argc, const char* argv[])
+parse(int argc, const char* argv[], bool parse_as_string = false)
 {
   try
   {
@@ -77,7 +77,20 @@ parse(int argc, const char* argv[])
 
     options.parse_positional({"input", "output", "positional"});
 
-    auto result = options.parse(argc, argv);
+    cxxopts::ParseResult result;
+    if (parse_as_string)
+    {
+        std::string argv_str;
+        for (int i = 0; i < argc; ++i)
+        {
+            argv_str += std::string(argv[i]) + std::string(" ");
+        }
+        result = options.parse(argv_str);
+    }
+    else
+    {
+        result = options.parse(argc, argv);
+    }
 
     if (result.count("help"))
     {
@@ -185,5 +198,8 @@ int main(int argc, const char* argv[])
 {
   parse(argc, argv);
 
+  // Parse argv as string
+  parse(argc, argv, true);
+
   return 0;
 }