Fix out-of-range error

vprus · vprus · commit 3e1d2603e63c · 2017-07-21T18:30:47.000+03:00
Closes #31.
diff --git a/include/boost/program_options/errors.hpp b/include/boost/program_options/errors.hpp
@@ -26,7 +26,12 @@ namespace boost { namespace program_options {
     inline std::string strip_prefixes(const std::string& text)
     {
         // "--foo-bar" -> "foo-bar"
-        return text.substr(text.find_first_not_of("-/"));
+        std::string::size_type i = text.find_first_not_of("-/");
+        if (i == std::string::npos) {
+            return text;
+        } else {
+            return text.substr(i);
+        }
     }
 
     /** Base class for all errors in the library. */

Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,12 @@ namespace boost { namespace program_options {`
`26`	`26`	`inline std::string strip_prefixes(const std::string& text)`
`27`	`27`	`{`
`28`	`28`	`// "--foo-bar" -> "foo-bar"`
`29`		`- return text.substr(text.find_first_not_of("-/"));`
	`29`	`+ std::string::size_type i = text.find_first_not_of("-/");`
	`30`	`+ if (i == std::string::npos) {`
	`31`	`+ return text;`
	`32`	`+ } else {`
	`33`	`+ return text.substr(i);`
	`34`	`+ }`
`30`	`35`	`}`
`31`	`36`
`32`	`37`	`/** Base class for all errors in the library. */`