lib: Return error early if there are any error diagnostics.

Author: emilio

libbindgen/Cargo.toml

@@ -12,7 +12,7 @@ license = "BSD-3-Clause"
 name = "libbindgen"
 readme = "README.md"
 repository = "https://github.com/servo/rust-bindgen"
-version = "0.1.1"
+version = "0.1.2"
 workspace = ".."
 
 [dev-dependencies]

libbindgen/src/lib.rs

@@ -510,7 +510,7 @@ impl<'ctx> Bindings<'ctx> {
         let span = span.unwrap_or(DUMMY_SP);
 
         let mut context = BindgenContext::new(options);
-        parse(&mut context);
+        try!(parse(&mut context));
 
         let module = ast::Mod {
             inner: span,
@@ -624,14 +624,20 @@ pub fn parse_one(ctx: &mut BindgenContext,
 }
 
 /// Parse the Clang AST into our `Item` internal representation.
-fn parse(context: &mut BindgenContext) {
+fn parse(context: &mut BindgenContext) -> Result<(), ()> {
     use clang::Diagnostic;
     use clangll::*;
 
+    let mut any_error = false;
     for d in context.translation_unit().diags().iter() {
         let msg = d.format(Diagnostic::default_opts());
         let is_err = d.severity() >= CXDiagnostic_Error;
         println!("{}, err: {}", msg, is_err);
+        any_error |= is_err;
+    }
+
+    if any_error {
+        return Err(());
     }
 
     let cursor = context.translation_unit().cursor();
@@ -646,6 +652,7 @@ fn parse(context: &mut BindgenContext) {
 
     assert!(context.current_module() == context.root_module(),
             "How did this happen?");
+    Ok(())
 }
 
 /// Extracted Clang version data

libbindgen/tests/headers/bitfield-enum-basic.h renamed to libbindgen/tests/headers/bitfield-enum-basic.hpp

@@ -1,3 +1,5 @@
+// bindgen-flags: -- -std=c++11
+
 template<typename...> using __void_t = void;
 
 template<typename _Iterator, typename = __void_t<>>