def reachability_check(context, context_scope, node, origin_scope=None):
first_flow_scope = node.get_parent_scope(include_flows=True)
if origin_scope is not None:
origin_flow_scopes = list(_get_flow_scopes(origin_scope))
node_flow_scopes = list(_get_flow_scopes(node))
branch_matches = True
for flow_scope in origin_flow_scopes:
if flow_scope in node_flow_scopes:
node_keyword = get_flow_branch_keyword(flow_scope, node)
origin_keyword = get_flow_branch_keyword(
flow_scope, origin_scope)
branch_matches = node_keyword == origin_keyword
if flow_scope.type == 'if_stmt':
if not branch_matches:
return UNREACHABLE
elif flow_scope.type == 'try_stmt':
if not branch_matches and origin_keyword == 'else' \
and node_keyword == 'except':
return UNREACHABLE
break
# Direct parents get resolved, we filter scopes that are separate
# branches. This makes sense for autocompletion and static analysis.
# For actual Python it doesn't matter, because we're talking about
# potentially unreachable code.
# e.g. `if 0:` would cause all name lookup within the flow make
# unaccessible. This is not a "problem" in Python, because the code is
# never called. In Jedi though, we still want to infer types.
while origin_scope is not None:
if first_flow_scope == origin_scope and branch_matches:
return REACHABLE
origin_scope = origin_scope.parent
return _break_check(context, context_scope, first_flow_scope, node)
def reachability_check(context, context_scope, node, origin_scope=None):
first_flow_scope = get_parent_scope(node, include_flows=True)
if origin_scope is not None:
origin_flow_scopes = list(_get_flow_scopes(origin_scope))
node_flow_scopes = list(_get_flow_scopes(node))
branch_matches = True
for flow_scope in origin_flow_scopes:
if flow_scope in node_flow_scopes:
node_keyword = get_flow_branch_keyword(flow_scope, node)
origin_keyword = get_flow_branch_keyword(flow_scope, origin_scope)
branch_matches = node_keyword == origin_keyword
if flow_scope.type == 'if_stmt':
if not branch_matches:
return UNREACHABLE
elif flow_scope.type == 'try_stmt':
if not branch_matches and origin_keyword == 'else' \
and node_keyword == 'except':
return UNREACHABLE
if branch_matches:
break
# Direct parents get resolved, we filter scopes that are separate
# branches. This makes sense for autocompletion and static analysis.
# For actual Python it doesn't matter, because we're talking about
# potentially unreachable code.
# e.g. `if 0:` would cause all name lookup within the flow make
# unaccessible. This is not a "problem" in Python, because the code is
# never called. In Jedi though, we still want to infer types.
while origin_scope is not None:
if first_flow_scope == origin_scope and branch_matches:
return REACHABLE
origin_scope = origin_scope.parent
return _break_check(context, context_scope, first_flow_scope, node)
