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from ..common.info import UNKNOWN, ID
from . import declarations
# XXX need tests:
# * variables
# * variable
# * variable_from_id
def _iter_vars(filenames, preprocessed, *,
handle_id=None,
_iter_decls=declarations.iter_all,
):
if handle_id is None:
handle_id = ID
for filename in filenames or ():
for kind, funcname, name, decl in _iter_decls(filename,
preprocessed=preprocessed,
):
if kind != 'variable':
continue
varid = handle_id(filename, funcname, name)
yield varid, decl
# XXX Add a "handle_var" arg like we did for get_resolver()?
def variables(*filenames,
perfilecache=None,
preprocessed=False,
known=None, # for types
handle_id=None,
_iter_vars=_iter_vars,
):
"""Yield (varid, decl) for each variable found in the given files.
If "preprocessed" is provided (and not False/None) then it is used
to decide which tool to use to parse the source code after it runs
through the C preprocessor. Otherwise the raw
"""
if len(filenames) == 1 and not (filenames[0], str):
filenames, = filenames
if perfilecache is None:
yield from _iter_vars(filenames, preprocessed)
else:
# XXX Cache per-file variables (e.g. `{filename: [(varid, decl)]}`).
raise NotImplementedError
def variable(name, filenames, *,
local=False,
perfilecache=None,
preprocessed=False,
handle_id=None,
_iter_vars=variables,
):
"""Return (varid, decl) for the first found variable that matches.
If "local" is True then the first matching local variable in the
file will always be returned. To avoid that, pass perfilecache and
pop each variable from the cache after using it.
"""
for varid, decl in _iter_vars(filenames,
perfilecache=perfilecache,
preprocessed=preprocessed,
):
if varid.name != name:
continue
if local:
if varid.funcname:
if varid.funcname == UNKNOWN:
raise NotImplementedError
return varid, decl
elif not varid.funcname:
return varid, decl
else:
return None, None # No matching variable was found.
def variable_from_id(id, filenames, *,
perfilecache=None,
preprocessed=False,
handle_id=None,
_get_var=variable,
):
"""Return (varid, decl) for the first found variable that matches."""
local = False
if isinstance(id, str):
name = id
else:
if id.funcname == UNKNOWN:
local = True
elif id.funcname:
raise NotImplementedError
name = id.name
if id.filename and id.filename != UNKNOWN:
filenames = [id.filename]
return _get_var(name, filenames,
local=local,
perfilecache=perfilecache,
preprocessed=preprocessed,
handle_id=handle_id,
)
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