Share macro code between tp_new and other class methods.
This commit is contained in:
Daniel Grunwald
parent
79707c03d2
commit
a14e3d2b77
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@ -26,6 +26,8 @@
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shared, // for std::ptr::Shared (#27730)
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//recover, // for converting panics to python exceptions (#27719)
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// -- TODO wait for stable release and promote recover code from cfg(nightly)
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// -- TODO remove <DUMMY> hack when it's no longer necessary on stable
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))]
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#![allow(unused_imports)] // because some imports are only necessary with python 2.x or 3.x
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@ -4,6 +4,9 @@
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This python script generates the py_class_impl! macro.
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"""
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from collections import namedtuple
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import sys
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header = '''
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// Copyright (c) 2016 Daniel Grunwald
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//
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@ -230,47 +233,142 @@ def data_decl():
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}};
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''')
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def tp_new(with_params):
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if with_params:
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param_capture = ', $($p:tt)+'
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tp_new = '''py_argparse_parse_plist_impl!{
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py_class_wrap_newfunc {$class::__new__}
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[] ($($p)+,)
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}'''
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impl = '''py_argparse_parse_plist_impl!{
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py_class_impl_item { $class, $py, __new__($cls: &$crate::PyType,) $res_type; { $($body)* } }
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[] ($($p)+,)
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}'''
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print(' // def __new__(cls, params)')
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indentation = [' ']
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last_char = '\n'
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def write(text):
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global last_char
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for line in text.splitlines(True):
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line = line.lstrip(' ')
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if len(line.strip()) == 0 and last_char == '\n':
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continue
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if last_char == '\n':
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initial_closing = 0
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for c in line:
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if c in ']}':
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initial_closing += 1
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else:
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param_capture = ''
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tp_new = 'py_class_wrap_newfunc!($class::__new__ [])'
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impl = 'py_class_impl_item! { $class, $py, __new__($cls: &$crate::PyType,) $res_type; { $($body)* } [] }'
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print(' // def __new__(cls)')
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print(''' { $class:ident $py:ident $info:tt
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/* slots: */ {
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/* type_slots */ [ $( $slot_name:ident : $slot_value:expr, )* ]
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$as_number:tt $as_sequence:tt
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}
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{ $( $imp:item )* } $members:tt;
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def __new__ ($cls:ident%s)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info
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/* slots: */ {
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/* type_slots */ [
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$( $slot_name : $slot_value, )*
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tp_new: Some(%s),
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]
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$as_number $as_sequence
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}
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/* impl: */ {
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$($imp)*
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%s
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}
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$members;
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$($tail)*
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}};''' % (param_capture, tp_new, impl))
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break
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if initial_closing:
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sys.stdout.write(''.join(indentation[:-initial_closing]))
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else:
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sys.stdout.write(''.join(indentation))
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elif last_char not in ' \n' and len(line) > 0 and line[0] not in ' \n;':
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sys.stdout.write(' ')
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sys.stdout.write(line)
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min_indent_level = len(indentation)
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for c in line:
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if c in '[{':
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if len(indentation) > min_indent_level:
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indentation.append('')
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else:
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indentation.append(' ')
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elif c in ']}':
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indentation.pop()
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if len(indentation) < min_indent_level:
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min_indent_level = len(indentation)
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last_char = line[-1]
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Slot = namedtuple('Slot', ['slot_type', 'slot_name'])
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def generate_case(pattern, new_impl=None, new_slots=None, new_members=None):
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write('{ $class:ident $py:ident')
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write('$info:tt')
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if new_slots:
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write('\n/* slots: */ {\n')
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if any(s.slot_type == 'type_slots' for s, v in new_slots):
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write('\n/* type_slots */ [ $( $type_slot_name:ident : $type_slot_value:expr, )* ]\n')
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else:
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write('$type_slots:tt')
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write('$as_number:tt')
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write('$as_sequence:tt')
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write('\n}\n')
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else:
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write('$slots:tt')
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if new_impl is not None:
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write('\n{ $( $imp:item )* }\n')
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else:
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write('$impls:tt')
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if new_members:
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write('\n{ $( $member_name:ident = $member_expr:expr; )* }')
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else:
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write('$members:tt')
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write(';\n')
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write(pattern)
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write('$($tail:tt)*\n')
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write('} => { py_class_impl! {\n')
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write('$class $py')
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write('$info')
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if new_slots:
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write('\n/* slots: */ {\n')
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if any(s.slot_type == 'type_slots' for s, v in new_slots):
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write('\n/* type_slots */ [\n')
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write('$( $type_slot_name : $type_slot_value, )*\n')
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for s, v in new_slots:
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if s.slot_type == 'type_slots':
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write('%s: %s,\n' % (s.slot_name, v))
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write(']\n')
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else:
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write('$type_slots')
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write('$as_number')
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write('$as_sequence')
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write('\n}\n')
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else:
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write('$slots')
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if new_impl is not None:
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write('\n/* impl: */ {\n')
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write('$($imp)*\n')
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write(new_impl)
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write('\n}\n')
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else:
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write('$impls')
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if new_members:
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write('\n/* members: */ {\n')
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write('$( $member_name = $member_expr; )*\n')
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for name, val in new_members:
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write('%s = %s;\n' % (name, val))
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write('}')
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else:
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write('$members')
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write('; $($tail)*\n')
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write('}};\n')
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def class_method(decoration='', special_name=None,
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slot=None, add_member=False, value_macro=None, value_args=None):
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assert(slot is None or isinstance(slot, Slot))
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name_pattern = special_name or '$name:ident'
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name_use = special_name or '$name'
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def impl(with_params):
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if with_params:
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param_pattern = ', $($p:tt)+'
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impl = '''py_argparse_parse_plist_impl!{
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py_class_impl_item { $class, $py, %s($cls: &$crate::PyType,) $res_type; { $($body)* } }
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[] ($($p)+,)
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}''' % name_use
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value = 'py_argparse_parse_plist_impl!{%s {%s} [] ($($p)+,)}' \
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% (value_macro, value_args)
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else:
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param_pattern = ''
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impl = 'py_class_impl_item! { $class, $py,%s($cls: &$crate::PyType,) $res_type; { $($body)* } [] }' \
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% name_use
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value = '%s!{%s []}' % (value_macro, value_args)
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pattern = '%s def %s ($cls:ident%s) -> $res_type:ty { $( $body:tt )* }' \
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% (decoration, name_pattern, param_pattern)
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slots = []
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if slot is not None:
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slots.append((slot, value))
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members = []
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if add_member:
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members.append((name_use, value))
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generate_case(pattern, new_impl=impl, new_slots=slots, new_members=members)
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impl(False) # without parameters
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impl(True) # with parameters
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def tp_new():
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class_method(special_name='__new__',
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slot=Slot('type_slots', 'tp_new'),
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value_macro='py_class_wrap_newfunc',
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value_args='$class::__new__')
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def traverse_and_clear():
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print('''
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@ -342,7 +440,7 @@ def traverse_and_clear():
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$($tail)*
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}};''')
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general_cases = '''
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instance_method = '''
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// def instance_method(&self)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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@ -385,50 +483,9 @@ general_cases = '''
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};
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$($tail)*
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}};
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'''
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// @classmethod def class_method(cls)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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{ $( $member_name:ident = $member_expr:expr; )* };
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@classmethod def $name:ident ($cls:ident)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info $slots
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/* impl: */ {
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$($imp)*
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py_class_impl_item! { $class, $py, $name($cls: &$crate::PyType,) $res_type; { $($body)* } [] }
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}
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/* members: */ {
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$( $member_name = $member_expr; )*
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$name = py_class_class_method!{$py, $class::$name []};
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};
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$($tail)*
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}};
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// @classmethod def class_method(cls, params)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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{ $( $member_name:ident = $member_expr:expr; )* };
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@classmethod def $name:ident ($cls:ident, $($p:tt)+)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info $slots
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/* impl: */ {
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$($imp)*
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py_argparse_parse_plist_impl!{
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py_class_impl_item { $class, $py, $name($cls: &$crate::PyType,) $res_type; { $($body)* } }
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[] ($($p)+,)
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}
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}
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/* members: */ {
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$( $member_name = $member_expr; )*
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$name = py_argparse_parse_plist_impl!{
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py_class_class_method {$py, $class::$name}
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[] ($($p)+,)
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};
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};
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$($tail)*
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}};
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static_method = '''
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// @staticmethod def static_method(params)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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@ -627,12 +684,16 @@ def main():
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print(macro_start)
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print(base_case)
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data_decl()
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tp_new(False)
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tp_new(True)
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tp_new()
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traverse_and_clear()
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for name, f in sorted(special_names.items()):
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f(name)
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print(general_cases)
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print(instance_method)
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class_method(decoration='@classmethod',
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add_member=True,
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value_macro='py_class_class_method',
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value_args='$py, $class::$name')
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print(static_method)
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print(macro_end)
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if __name__ == '__main__':
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@ -224,21 +224,20 @@ macro_rules! py_class_impl {
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$($tail)*
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}};
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// def __new__(cls)
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{ $class:ident $py:ident $info:tt
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/* slots: */ {
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/* type_slots */ [ $( $slot_name:ident : $slot_value:expr, )* ]
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/* type_slots */ [ $( $type_slot_name:ident : $type_slot_value:expr, )* ]
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$as_number:tt $as_sequence:tt
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}
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{ $( $imp:item )* } $members:tt;
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def __new__ ($cls:ident)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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{ $( $imp:item )* }
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$members:tt;
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def __new__ ($cls:ident) -> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info
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/* slots: */ {
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/* type_slots */ [
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$( $slot_name : $slot_value, )*
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tp_new: Some(py_class_wrap_newfunc!($class::__new__ [])),
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$( $type_slot_name : $type_slot_value, )*
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tp_new: py_class_wrap_newfunc!{$class::__new__ []},
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]
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$as_number $as_sequence
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}
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@ -246,27 +245,22 @@ macro_rules! py_class_impl {
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$($imp)*
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py_class_impl_item! { $class, $py,__new__($cls: &$crate::PyType,) $res_type; { $($body)* } [] }
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}
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$members;
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$($tail)*
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$members; $($tail)*
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}};
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// def __new__(cls, params)
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{ $class:ident $py:ident $info:tt
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/* slots: */ {
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/* type_slots */ [ $( $slot_name:ident : $slot_value:expr, )* ]
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/* type_slots */ [ $( $type_slot_name:ident : $type_slot_value:expr, )* ]
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$as_number:tt $as_sequence:tt
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}
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{ $( $imp:item )* } $members:tt;
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def __new__ ($cls:ident, $($p:tt)+)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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{ $( $imp:item )* }
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$members:tt;
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def __new__ ($cls:ident, $($p:tt)+) -> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info
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/* slots: */ {
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/* type_slots */ [
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$( $slot_name : $slot_value, )*
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tp_new: Some(py_argparse_parse_plist_impl!{
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py_class_wrap_newfunc {$class::__new__}
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[] ($($p)+,)
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}),
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$( $type_slot_name : $type_slot_value, )*
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tp_new: py_argparse_parse_plist_impl!{py_class_wrap_newfunc {$class::__new__} [] ($($p)+,)},
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]
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$as_number $as_sequence
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}
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@ -277,8 +271,7 @@ macro_rules! py_class_impl {
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[] ($($p)+,)
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}
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}
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$members;
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$($tail)*
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$members; $($tail)*
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}};
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// def __traverse__(self, visit)
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@ -992,12 +985,10 @@ macro_rules! py_class_impl {
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$($tail)*
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}};
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// @classmethod def class_method(cls)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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{ $( $member_name:ident = $member_expr:expr; )* };
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@classmethod def $name:ident ($cls:ident)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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@classmethod def $name:ident ($cls:ident) -> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info $slots
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/* impl: */ {
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@ -1007,15 +998,12 @@ macro_rules! py_class_impl {
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/* members: */ {
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$( $member_name = $member_expr; )*
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$name = py_class_class_method!{$py, $class::$name []};
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};
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$($tail)*
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}; $($tail)*
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}};
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// @classmethod def class_method(cls, params)
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{ $class:ident $py:ident $info:tt $slots:tt
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{ $( $imp:item )* }
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{ $( $member_name:ident = $member_expr:expr; )* };
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@classmethod def $name:ident ($cls:ident, $($p:tt)+)
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-> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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@classmethod def $name:ident ($cls:ident, $($p:tt)+) -> $res_type:ty { $( $body:tt )* } $($tail:tt)*
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} => { py_class_impl! {
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$class $py $info $slots
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/* impl: */ {
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@ -1027,12 +1015,8 @@ macro_rules! py_class_impl {
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}
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/* members: */ {
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$( $member_name = $member_expr; )*
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$name = py_argparse_parse_plist_impl!{
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py_class_class_method {$py, $class::$name}
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[] ($($p)+,)
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};
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};
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$($tail)*
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$name = py_argparse_parse_plist_impl!{py_class_class_method {$py, $class::$name} [] ($($p)+,)};
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}; $($tail)*
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}};
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// @staticmethod def static_method(params)
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@ -106,6 +106,6 @@ macro_rules! py_class_wrap_newfunc {
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})
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})
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}
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wrap_newfunc::<()>
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Some(wrap_newfunc::<()>)
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}}
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}
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