Add (const char *, size_t) ctors for str/bytes

example/example-python-types.cpp

@@ -144,7 +144,7 @@ public:
     }
     }
 
 
     py::bytes get_bytes_from_str() {
     py::bytes get_bytes_from_str() {
-        return (py::bytes) py::str(std::string("bar"));
+        return (py::bytes) py::str("bar", 3);
     }
     }
 
 
     py::str get_str_from_string() {
     py::str get_str_from_string() {
@@ -152,7 +152,7 @@ public:
     }
     }
 
 
     py::str get_str_from_bytes() {
     py::str get_str_from_bytes() {
-        return (py::str) py::bytes(std::string("boo"));
+        return (py::str) py::bytes("boo", 3);
     }
     }
 
 
     static int value;
     static int value;

include/pybind11/pytypes.h

@@ -345,8 +345,8 @@ class str : public object {
 public:
 public:
     PYBIND11_OBJECT_DEFAULT(str, object, detail::PyUnicode_Check_Permissive)
     PYBIND11_OBJECT_DEFAULT(str, object, detail::PyUnicode_Check_Permissive)
 
 
-    str(const std::string &s)
-        : object(PyUnicode_FromStringAndSize(s.c_str(), (ssize_t) s.length()), false) {
+    str(const char *c, size_t n)
+    : object(PyUnicode_FromStringAndSize(c, (ssize_t) n), false) {
         if (!m_ptr) pybind11_fail("Could not allocate string object!");
         if (!m_ptr) pybind11_fail("Could not allocate string object!");
     }
     }
 
 
@@ -355,6 +355,8 @@ public:
         if (!m_ptr) pybind11_fail("Could not allocate string object!");
         if (!m_ptr) pybind11_fail("Could not allocate string object!");
     }
     }
 
 
+    str(const std::string &s) : str(s.data(), s.size()) { }
+
     operator std::string() const {
     operator std::string() const {
         object temp = *this;
         object temp = *this;
         if (PyUnicode_Check(m_ptr)) {
         if (PyUnicode_Check(m_ptr)) {
@@ -385,11 +387,13 @@ class bytes : public object {
 public:
 public:
     PYBIND11_OBJECT_DEFAULT(bytes, object, PYBIND11_BYTES_CHECK)
     PYBIND11_OBJECT_DEFAULT(bytes, object, PYBIND11_BYTES_CHECK)
 
 
-    bytes(const std::string &s)
-        : object(PYBIND11_BYTES_FROM_STRING_AND_SIZE(s.data(), (ssize_t) s.size()), false) {
+    bytes(const char *c, size_t n)
+    : object(PYBIND11_BYTES_FROM_STRING_AND_SIZE(c, (ssize_t) n), false) {
         if (!m_ptr) pybind11_fail("Could not allocate bytes object!");
         if (!m_ptr) pybind11_fail("Could not allocate bytes object!");
     }
     }
 
 
+    bytes(const std::string &s) : bytes(s.data(), s.size()) { }
+
     operator std::string() const {
     operator std::string() const {
         char *buffer;
         char *buffer;
         ssize_t length;
         ssize_t length;