From 2ce1cdbf84ce883b992bc8ffec3d29b4da229b72 Mon Sep 17 00:00:00 2001 From: Doug Evans Date: Wed, 29 Apr 2015 13:24:21 -0700 Subject: PR python/18285 gdb/ChangeLog: PR python/18285 * NEWS: Document new gdb.XMethodWorker.get_result_type method. * eval.c (evaluate_subexp_standard) : Handle EVAL_AVOID_SIDE_EFFECTS for xmethods. * extension-priv.h (struct extension_language_ops) : New member. * extension.c (get_xmethod_result_type): New function. * extension.h (get_xmethod_result_type): Declare. * python/py-xmethods.c (get_result_type_method_name): New static global. (py_get_result_type_method_name): Ditto. (gdbpy_get_xmethod_result_type): New function. (gdbpy_initialize_xmethods): Initialize py_get_result_type_method_name. * python/python-internal.h (gdbpy_get_xmethod_result_type): Declare. * python/python.c (python_extension_ops): Add gdbpy_get_xmethod_result_type. * python/lib/gdb/xmethod.py (XMethodWorker): Add get_result_type. * valarith.c (value_x_binop): Handle EVAL_AVOID_SIDE_EFFECTS for xmethods. (value_x_unop): Ditto. * value.c (result_type_of_xmethod): New function. * value.h (result_type_of_xmethod): Declare. gdb/testsuite/ChangeLog: * gdb.python/py-xmethods.exp: Add ptype tests. * gdb.python/py-xmethods.py (E_method_char_worker): Add get_result_type method. gdb/doc/ChangeLog: * python.texi (Xmethod API) : Document. (Writing an Xmethod): Add get_result_type to example. --- gdb/python/lib/gdb/xmethod.py | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) (limited to 'gdb/python/lib') diff --git a/gdb/python/lib/gdb/xmethod.py b/gdb/python/lib/gdb/xmethod.py index 672b2d8..6acc23c 100644 --- a/gdb/python/lib/gdb/xmethod.py +++ b/gdb/python/lib/gdb/xmethod.py @@ -101,9 +101,11 @@ class XMethodWorker(object): invokes the method when GDB wants it to. Internally, GDB first invokes the 'get_arg_types' method to perform overload resolution. If GDB selects to invoke this Python xmethod, then it invokes it via the overridden - '__call__' method. + '__call__' method. The 'get_result_type' method is used to implement + 'ptype' on the xmethod. - Derived classes should override the 'get_arg_types' and '__call__' methods. + Derived classes should override the 'get_arg_types', 'get_result_type' + and '__call__' methods. """ def get_arg_types(self): @@ -117,6 +119,20 @@ class XMethodWorker(object): """ raise NotImplementedError("XMethodWorker get_arg_types") + def get_result_type(self, *args): + """Return the type of the result of the xmethod. + + Args: + args: Arguments to the method. Each element of the tuple is a + gdb.Value object. The first element is the 'this' pointer + value. These are the same arguments passed to '__call__'. + + Returns: + A gdb.Type object representing the type of the result of the + xmethod. + """ + raise NotImplementedError("XMethodWorker get_result_type") + def __call__(self, *args): """Invoke the xmethod. -- cgit v1.1