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|
import re
from ._regexes import (
GLOBAL as _GLOBAL,
)
from ._common import (
log_match,
parse_var_decl,
set_capture_groups,
)
from ._compound_decl_body import DECL_BODY_PARSERS
from ._func_body import parse_function_statics as parse_function_body
GLOBAL = set_capture_groups(_GLOBAL, (
'EMPTY',
'COMPOUND_LEADING',
'COMPOUND_KIND',
'COMPOUND_NAME',
'FORWARD_KIND',
'FORWARD_NAME',
'MAYBE_INLINE_ACTUAL',
'TYPEDEF_DECL',
'TYPEDEF_FUNC_PARAMS',
'VAR_STORAGE',
'FUNC_INLINE',
'VAR_DECL',
'FUNC_PARAMS',
'FUNC_DELIM',
'FUNC_LEGACY_PARAMS',
'VAR_INIT',
'VAR_ENDING',
))
GLOBAL_RE = re.compile(rf'^ \s* {GLOBAL}', re.VERBOSE)
def parse_globals(source, anon_name):
for srcinfo in source:
m = GLOBAL_RE.match(srcinfo.text)
if not m:
# We need more text.
continue
for item in _parse_next(m, srcinfo, anon_name):
if callable(item):
parse_body = item
yield from parse_body(source)
else:
yield item
else:
# We ran out of lines.
if srcinfo is not None:
srcinfo.done()
return
def _parse_next(m, srcinfo, anon_name):
(
empty,
# compound type decl (maybe inline)
compound_leading, compound_kind, compound_name,
forward_kind, forward_name, maybe_inline_actual,
# typedef
typedef_decl, typedef_func_params,
# vars and funcs
storage, func_inline, decl,
func_params, func_delim, func_legacy_params,
var_init, var_ending,
) = m.groups()
remainder = srcinfo.text[m.end():]
if empty:
log_match('global empty', m)
srcinfo.advance(remainder)
elif maybe_inline_actual:
log_match('maybe_inline_actual', m)
# Ignore forward declarations.
# XXX Maybe return them too (with an "isforward" flag)?
if not maybe_inline_actual.strip().endswith(';'):
remainder = maybe_inline_actual + remainder
yield srcinfo.resolve(forward_kind, None, forward_name)
if maybe_inline_actual.strip().endswith('='):
# We use a dummy prefix for a fake typedef.
# XXX Ideally this case would not be caught by MAYBE_INLINE_ACTUAL.
_, name, data = parse_var_decl(f'{forward_kind} {forward_name} fake_typedef_{forward_name}')
yield srcinfo.resolve('typedef', data, name, parent=None)
remainder = f'{name} {remainder}'
srcinfo.advance(remainder)
elif compound_kind:
kind = compound_kind
name = compound_name or anon_name('inline-')
# Immediately emit a forward declaration.
yield srcinfo.resolve(kind, name=name, data=None)
# un-inline the decl. Note that it might not actually be inline.
# We handle the case in the "maybe_inline_actual" branch.
srcinfo.nest(
remainder,
f'{compound_leading or ""} {compound_kind} {name}',
)
def parse_body(source):
_parse_body = DECL_BODY_PARSERS[compound_kind]
data = [] # members
ident = f'{kind} {name}'
for item in _parse_body(source, anon_name, ident):
if item.kind == 'field':
data.append(item)
else:
yield item
# XXX Should "parent" really be None for inline type decls?
yield srcinfo.resolve(kind, data, name, parent=None)
srcinfo.resume()
yield parse_body
elif typedef_decl:
log_match('typedef', m)
kind = 'typedef'
_, name, data = parse_var_decl(typedef_decl)
if typedef_func_params:
return_type = data
# This matches the data for func declarations.
data = {
'storage': None,
'inline': None,
'params': f'({typedef_func_params})',
'returntype': return_type,
'isforward': True,
}
yield srcinfo.resolve(kind, data, name, parent=None)
srcinfo.advance(remainder)
elif func_delim or func_legacy_params:
log_match('function', m)
kind = 'function'
_, name, return_type = parse_var_decl(decl)
func_params = func_params or func_legacy_params
data = {
'storage': storage,
'inline': func_inline,
'params': f'({func_params})',
'returntype': return_type,
'isforward': func_delim == ';',
}
yield srcinfo.resolve(kind, data, name, parent=None)
srcinfo.advance(remainder)
if func_delim == '{' or func_legacy_params:
def parse_body(source):
yield from parse_function_body(source, name, anon_name)
yield parse_body
elif var_ending:
log_match('global variable', m)
kind = 'variable'
_, name, vartype = parse_var_decl(decl)
data = {
'storage': storage,
'vartype': vartype,
}
yield srcinfo.resolve(kind, data, name, parent=None)
if var_ending == ',':
# It was a multi-declaration, so queue up the next one.
_, qual, typespec, _ = vartype.values()
remainder = f'{storage or ""} {qual or ""} {typespec} {remainder}'
srcinfo.advance(remainder)
if var_init:
_data = f'{name} = {var_init.strip()}'
yield srcinfo.resolve('statement', _data, name=None)
else:
# This should be unreachable.
raise NotImplementedError
|
