Merge branch 'master' into 0.20.x

CHANGES.rst

@@ -23,6 +23,9 @@ Features added
 
 * Constant Python float values are cached.
 
+* String/Unicode formatting using the '%' operator uses a faster
+  C-API call.
+
 * ``bytearray`` has become a known type and supports coercion from and
   to C strings.  Indexing, slicing and decoding is optimised. Note that
   this may have an impact on existing code due to type inference.
@@ -64,6 +67,9 @@ Features added
   oft-used utility code once in a separate directory rather than as
   part of each generated file.
 
+* ``unraisable_tracebacks`` directive added to control printing of
+  tracebacks of unraisable exceptions.
+
 Bugs fixed
 ----------
 

Cython/Compiler/Code.py

@@ -2077,9 +2077,10 @@ class CCodeWriter(object):
             Naming.clineno_cname,
             Naming.lineno_cname,
             Naming.filename_cname,
+            int(self.globalstate.directives['unraisable_tracebacks'])
         )
         self.funcstate.uses_error_indicator = True
-        self.putln('__Pyx_WriteUnraisable("%s", %s, %s, %s);' % format_tuple)
+        self.putln('__Pyx_WriteUnraisable("%s", %s, %s, %s, %s);' % format_tuple)
         self.globalstate.use_utility_code(
             UtilityCode.load_cached("WriteUnraisableException", "Exceptions.c"))
 

Cython/Compiler/ModuleNode.py

@@ -2538,6 +2538,10 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
                                                '__releasebuffer__')
                     if (func.is_special and Options.docstrings and
                             func.wrapperbase_cname and not is_buffer):
+                        slot = TypeSlots.method_name_to_slot[func.name]
+                        preprocessor_guard = slot.preprocessor_guard_code()
+                        if preprocessor_guard:
+                            code.putln(preprocessor_guard)
                         code.putln('#if CYTHON_COMPILING_IN_CPYTHON')
                         code.putln("{")
                         code.putln(
@@ -2558,6 +2562,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
                         code.putln("}")
                         code.putln("}")
                         code.putln('#endif')
+                        if preprocessor_guard:
+                            code.putln('#endif')
                 if type.vtable_cname:
                     code.putln(
                         "if (__Pyx_SetVtable(%s.tp_dict, %s) < 0) %s" % (

Cython/Compiler/Nodes.py

@@ -1245,7 +1245,9 @@ class CVarDefNode(StatNode):
             if (len(self.declarators) > 1
                 and not isinstance(declarator, CNameDeclaratorNode)
                 and env.directives['warn.multiple_declarators']):
-                warning(declarator.pos, "Non-trivial type declarators in shared declaration.", 1)
+                warning(declarator.pos,
+                    "Non-trivial type declarators in shared declaration (e.g. mix of pointers and values). " +
+                    "Each pointer declaration should be on its own line.", 1)
 
             if isinstance(declarator, CFuncDeclaratorNode):
                 name_declarator, type = declarator.analyse(base_type, env, directive_locals=self.directive_locals)

Cython/Compiler/Options.py

@@ -112,6 +112,7 @@ directive_defaults = {
     'c_string_type': 'bytes',
     'c_string_encoding': '',
     'type_version_tag': True,   # enables Py_TPFLAGS_HAVE_VERSION_TAG on extension types
+    'unraisable_tracebacks': False,
 
     # set __file__ and/or __path__ to known source/target path at import time (instead of not having them available)
     'set_initial_path' : None,  # SOURCEFILE or "/full/path/to/module"

Cython/Compiler/Pipeline.py

@@ -6,6 +6,7 @@ import DebugFlags
 import Options
 from Visitor import CythonTransform
 from Errors import CompileError, InternalError, AbortError
+import Naming
 
 #
 # Really small pipeline stages
@@ -279,6 +280,9 @@ def create_pyx_as_pxd_pipeline(context, result):
         for entry in root.scope.entries.values():
             if not entry.in_cinclude:
                 entry.defined_in_pxd = 1
+                if entry.name == entry.cname and entry.visibility != 'extern':
+                    # Always mangle non-extern cimported entries.
+                    entry.cname = entry.scope.mangle(Naming.func_prefix, entry.name)
         return StatListNode(root.pos, stats=[]), root.scope
     pipeline.append(fake_pxd)
     return pipeline

Cython/Utility/Exceptions.c

@@ -417,16 +417,22 @@ static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value,
 /////////////// WriteUnraisableException.proto ///////////////
 
 static void __Pyx_WriteUnraisable(const char *name, int clineno,
-                                  int lineno, const char *filename); /*proto*/
+                                  int lineno, const char *filename,
+                                  int full_traceback); /*proto*/
 
 /////////////// WriteUnraisableException ///////////////
 //@requires: PyErrFetchRestore
 
 static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
-                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename) {
+                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename,
+                                  int full_traceback) {
     PyObject *old_exc, *old_val, *old_tb;
     PyObject *ctx;
     __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
+    if (full_traceback) {
+        __Pyx_ErrRestore(old_exc, old_val, old_tb);
+        PyErr_PrintEx(1);
+    }
     #if PY_MAJOR_VERSION < 3
     ctx = PyString_FromString(name);
     #else

Cython/Utility/StringTools.c

@@ -695,13 +695,18 @@ static CYTHON_INLINE int __Pyx_PyByteArray_AppendObject(PyObject* bytearray, PyO
             PyErr_SetString(PyExc_ValueError, "string must be of size 1");
             return -1;
         }
-        ival = PyString_AS_STRING(value)[0];
+        ival = (unsigned char) (PyString_AS_STRING(value)[0]);
     } else
 #endif
     {
+        // CPython calls PyNumber_Index() internally
         ival = __Pyx_PyIndex_AsSsize_t(value);
-        if (unlikely(ival == -1 && PyErr_Occurred()))
+        if (unlikely((ival < 0) | (ival > 255))) {
+            if (ival == -1 && PyErr_Occurred())
                 return -1;
+            PyErr_SetString(PyExc_ValueError, "byte must be in range(0, 256)");
+            return -1;
+        }
     }
     return __Pyx_PyByteArray_Append(bytearray, ival);
 }
@@ -713,7 +718,6 @@ static CYTHON_INLINE int __Pyx_PyByteArray_Append(PyObject* bytearray, int value
 //////////////////// ByteArrayAppend ////////////////////
 //@requires: ObjectHandling.c::PyObjectCallMethod
 
-// signature uses Py_ssize_t to make coercions use PyNumber_Index(), as CPython does
 static CYTHON_INLINE int __Pyx_PyByteArray_Append(PyObject* bytearray, int value) {
     PyObject *pyval, *retval;
 #if CYTHON_COMPILING_IN_CPYTHON

Cython/Utility/TypeConversion.c

@@ -276,11 +276,34 @@ static CYTHON_INLINE PyObject* __Pyx_PyNumber_Int(PyObject* x) {
   return res;
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+ #if CYTHON_USE_PYLONG_INTERNALS
+  #include "longintrepr.h"
+ #endif
+#endif
 static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
   Py_ssize_t ival;
   PyObject *x;
+#if PY_MAJOR_VERSION < 3
   if (likely(PyInt_CheckExact(b)))
+      return PyInt_AS_LONG(b);
+#endif
+  if (likely(PyLong_CheckExact(b))) {
+    #if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+     #if CYTHON_USE_PYLONG_INTERNALS
+       switch (Py_SIZE(b)) {
+       case -1: return -(sdigit)((PyLongObject*)b)->ob_digit[0];
+       case  0: return 0;
+       case  1: return ((PyLongObject*)b)->ob_digit[0];
+       }
+     #endif
+    #endif
+  #if PY_VERSION_HEX < 0x02060000
     return PyInt_AsSsize_t(b);
+  #else
+    return PyLong_AsSsize_t(b);
+  #endif
+  }
   x = PyNumber_Index(b);
   if (!x) return -1;
   ival = PyInt_AsSsize_t(x);

docs/src/reference/compilation.rst

@@ -363,6 +363,9 @@ Cython code.  Here is the list of currently supported directives:
     internally without paying attention to cache consistency, this option can
     be set to False.
 
+``unraisable_tracebacks`` (True / False)
+    Whether to print tracebacks when suppressing unraisable exceptions.
+
 
 How to set directives
 ---------------------

docs/src/userguide/wrapping_CPlusPlus.rst

@@ -26,7 +26,7 @@ main new features of Cython v0.13 regarding C++ support:
 * C++ objects can now be dynamically allocated with ``new`` and ``del`` keywords.
 * C++ objects can be stack-allocated.
 * C++ classes can be declared with the new keyword ``cppclass``.
-* Templated classes are supported.
+* Templated classes and functions are supported.
 * Overloaded functions are supported.
 * Overloading of C++ operators (such as operator+, operator[],...) is supported.
 
@@ -388,7 +388,15 @@ Cython uses a bracket syntax for templating. A simple example for wrapping C++ v
     del v
 
 Multiple template parameters can be defined as a list, such as [T, U, V]
-or [int, bool, char].
+or [int, bool, char].  Template functions are defined similarly, with
+the template parameter list following the function name::
+
+    cdef extern from "<algorithm>" namespace "std":
+        T max[T](T a, T b)
+
+    print max[long](3, 4)
+    print max(1.5, 2.5)  # simple template argument deduction
+
 
 Standard library
 -----------------

runtests.py

@@ -448,6 +448,9 @@ class TestBuilder(object):
                 continue
             if filename.startswith('.'):
                 continue # certain emacs backup files
+            if context == 'pyregr':
+                tags = defaultdict(list)
+            else:
                 tags = parse_tags(filepath)
             fqmodule = "%s.%s" % (context, module)
             if not [ 1 for match in self.selectors

tests/compile/specmethdocstring.pyx

@@ -21,7 +21,7 @@ cdef class C:
         def __set__(self, x):
             "And here is another one."
 
-    def __add__(self, other):
+    def __div__(self, other):
         "usable docstring"
     def __iter__(self):
         "usable docstring"

tests/memoryview/relaxed_strides.pyx

@@ -26,6 +26,16 @@ See also:
 
 import numpy as np
 
+numpy_version = np.__version__.split('.')[:2]
+try:
+    numpy_version = tuple(map(int, numpy_version))
+except ValueError:
+    numpy_version = (20, 0)
+
+NUMPY_HAS_RELAXED_STRIDES = (
+    numpy_version < (1, 8) or
+    np.ones((10, 1), order="C").flags.f_contiguous)
+
 
 def test_one_sized(array):
     """
@@ -33,7 +43,8 @@ def test_one_sized(array):
     >>> test_one_sized(contig)[0]
     1.0
     >>> a = np.arange(10, dtype=np.double)[::100]
-    >>> test_one_sized(a)[0]
+    >>> if NUMPY_HAS_RELAXED_STRIDES: print(test_one_sized(a)[0])
+    ... else: print(1.0)
     1.0
     """
     cdef double[::1] a = array
@@ -47,7 +58,7 @@ def test_zero_sized(array):
     >>> _ = test_zero_sized(contig)
 
     >>> a = np.arange(10, dtype=np.double)[100:200:10]
-    >>> _ = test_zero_sized(a)
+    >>> if NUMPY_HAS_RELAXED_STRIDES: _ = test_zero_sized(a)
     """
     cdef double[::1] a = array
     return a

tests/run/bytearraymethods.pyx

@@ -211,6 +211,21 @@ def bytearray_append(bytearray b, char c, int i, object o):
     >>> print(b.decode('ascii'))
     abcXxyz
 
+    >>> b = bytearray(b'abc')
+    >>> b = bytearray_append(b, ord('x'), ord('y'), ord('\\xc3') if IS_PY3 else b'\\xc3')
+    >>> print(b[:-1].decode('ascii'))
+    abcXxy
+    >>> print('%x' % b[-1])
+    c3
+
+    >>> b = bytearray(b'abc')
+    >>> try:
+    ...     b = bytearray_append(b, ord('x'), ord('y'), b'zz')
+    ... except (TypeError, ValueError): pass  # (Py3, Py2)
+    ... else: print("FAIL")
+    >>> print(b.decode('ascii'))
+    abcXxy
+
     >>> b = bytearray(b'abc')
     >>> b = bytearray_append(b, -1, ord('y'), ord('z'))  # doctest: +ELLIPSIS
     Traceback (most recent call last):