Expose current 'print' settings to Python

PR python/17291 asks for access to the current print options.  While I
think this need is largely satisfied by the existence of
Value.format_string, it seemed to me that a bit more could be done.

First, while Value.format_string uses the user's settings, it does not
react to temporary settings such as "print/x".  This patch changes
this.

Second, there is no good way to examine the current settings (in
particular the temporary ones in effect for just a single "print").
This patch adds this as well.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=17291
This commit is contained in:
Tom Tromey
2022-06-06 09:54:45 -06:00
parent aa63b0a77e
commit c4a3dbaf11
10 changed files with 209 additions and 26 deletions

View File

@ -17,13 +17,15 @@
#include "python-internal.h"
#include "varobj.h"
#include "varobj-iter.h"
#include "valprint.h"
/* A dynamic varobj iterator "class" for python pretty-printed
varobjs. This inherits struct varobj_iter. */
struct py_varobj_iter : public varobj_iter
{
py_varobj_iter (struct varobj *var, gdbpy_ref<> &&pyiter);
py_varobj_iter (struct varobj *var, gdbpy_ref<> &&pyiter,
const value_print_options *opts);
~py_varobj_iter () override;
std::unique_ptr<varobj_item> next () override;
@ -41,6 +43,9 @@ private:
/* The python iterator returned by the printer's 'children' method,
or NULL if not available. */
PyObject *m_iter;
/* The print options to use. */
value_print_options m_opts;
};
/* Implementation of the 'dtor' method of pretty-printed varobj
@ -67,6 +72,9 @@ py_varobj_iter::next ()
gdbpy_enter_varobj enter_py (m_var);
scoped_restore set_options = make_scoped_restore (&gdbpy_current_print_options,
&m_opts);
gdbpy_ref<> item (PyIter_Next (m_iter));
if (item == NULL)
@ -124,9 +132,11 @@ py_varobj_iter::next ()
whose children the iterator will be iterating over. PYITER is the
python iterator actually responsible for the iteration. */
py_varobj_iter::py_varobj_iter (struct varobj *var, gdbpy_ref<> &&pyiter)
py_varobj_iter::py_varobj_iter (struct varobj *var, gdbpy_ref<> &&pyiter,
const value_print_options *opts)
: m_var (var),
m_iter (pyiter.release ())
m_iter (pyiter.release ()),
m_opts (*opts)
{
}
@ -134,13 +144,17 @@ py_varobj_iter::py_varobj_iter (struct varobj *var, gdbpy_ref<> &&pyiter)
over VAR's children. */
std::unique_ptr<varobj_iter>
py_varobj_get_iterator (struct varobj *var, PyObject *printer)
py_varobj_get_iterator (struct varobj *var, PyObject *printer,
const value_print_options *opts)
{
gdbpy_enter_varobj enter_py (var);
if (!PyObject_HasAttr (printer, gdbpy_children_cst))
return NULL;
scoped_restore set_options = make_scoped_restore (&gdbpy_current_print_options,
opts);
gdbpy_ref<> children (PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
NULL));
if (children == NULL)
@ -157,5 +171,6 @@ py_varobj_get_iterator (struct varobj *var, PyObject *printer)
}
return std::unique_ptr<varobj_iter> (new py_varobj_iter (var,
std::move (iter)));
std::move (iter),
opts));
}