more code style checks in Travis CI :)

include/pybind11/functional.h

@@ -27,7 +27,6 @@ public:
         if (!src_ || !PyCallable_Check(src_.ptr()))
             return false;
 
-        {
         /*
            When passing a C++ function as an argument to another C++
            function via Python, every function call would normally involve
@@ -47,7 +46,6 @@ public:
                 return true;
             }
         }
-        }
 
         object src(src_, true);
         value = [src](Args... args) -> Return {

include/pybind11/numpy.h

@@ -693,8 +693,8 @@ struct field_descriptor {
 inline PYBIND11_NOINLINE void register_structured_dtype(
     const std::initializer_list<field_descriptor>& fields,
     const std::type_info& tinfo, size_t itemsize,
-    bool (*direct_converter)(PyObject *, void *&))
-{
+    bool (*direct_converter)(PyObject *, void *&)) {
+
     auto& numpy_internals = get_numpy_internals();
     if (numpy_internals.get_type_info(tinfo, false))
         pybind11_fail("NumPy: dtype is already registered");

tools/check-style.sh

@@ -40,6 +40,19 @@ while read -u 3 f; do
 done
 
 found=
+# The mt=41 sets a red background for matched tabs:
+exec 3< <(GREP_COLORS='mt=41' grep '^\s*{\s*$' include/ docs/*.rst -rn --color=always)
+while read -u 3 f; do
+    if [ -z "$found" ]; then
+        echo -e '\e[31m\e[01mError: braces should occur on the same line as the if/while/.. statement. Found issues in the following files: \e[0m'
+        found=1
+        errors=1
+    fi
+
+    echo "    $f"
+done
+
+found=
 exec 3< <(grep '\<\(if\|for\|while\)(\|){' include/ tests/*.{cpp,py,h} -rn --color=always)
 while read -u 3 line; do
     if [ -z "$found" ]; then