Merge pull request #1114 from dtolnay/failstring

Allow trycatch to call Fail using std::string

Author: dtolnay

gen/src/builtin.rs

@@ -255,6 +255,7 @@ pub(super) fn write(out: &mut OutFile) {
     }
 
     if builtin.trycatch {
+        include.string = true;
         out.next_section();
         writeln!(out, "class Fail final {{");
         writeln!(out, "  ::rust::repr::PtrLen &throw$;");
@@ -264,6 +265,7 @@ pub(super) fn write(out: &mut OutFile) {
             "  Fail(::rust::repr::PtrLen &throw$) : throw$(throw$) {{}}"
         );
         writeln!(out, "  void operator()(const char *) noexcept;");
+        writeln!(out, "  void operator()(const std::string &) noexcept;");
         writeln!(out, "}};");
     }
 

src/cxx.cc

@@ -537,11 +537,16 @@ class Fail final {
 public:
   Fail(repr::PtrLen &throw$) : throw$(throw$) {}
   void operator()(const char *) noexcept;
+  void operator()(const std::string &) noexcept;
 };
 
 void Fail::operator()(const char *catch$) noexcept {
   throw$ = cxxbridge1$exception(catch$, std::strlen(catch$));
 }
+
+void Fail::operator()(const std::string &catch$) noexcept {
+  throw$ = cxxbridge1$exception(catch$.data(), catch$.length());
+}
 } // namespace detail
 
 } // namespace cxxbridge1