From 4b7d1d8c4856aca337b9bbbbf719870b566f5b7e Mon Sep 17 00:00:00 2001 From: Emmanuele Bassi Date: Thu, 24 Jun 2021 18:00:02 +0100 Subject: scanner: Validate emitter methods Follow the same semantics as Vala: 1. emitters should have the same return value as the signal 2. emitters should have the same parameters as the signal they emit (minus the instance parameter, which is implied in signals) --- giscanner/introspectablepass.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/giscanner/introspectablepass.py b/giscanner/introspectablepass.py index 305e192e..7c26e31b 100644 --- a/giscanner/introspectablepass.py +++ b/giscanner/introspectablepass.py @@ -208,6 +208,41 @@ class IntrospectablePass(object): if not self._type_is_introspectable(obj.retval.type): obj.introspectable = False return True + if isinstance(obj, ast.Signal): + if obj.emitter is None: + return False + parent = stack[0] + for method in parent.methods: + if method.name != obj.emitter: + continue + if not obj.retval.type.is_equiv(method.retval.type): + self._parameter_warning( + parent, + obj, + "Emitter method %s for signal %s::%s does not have the " + "same return value type" % (method.symbol, parent.name, obj.name)) + obj.emitter = None + return False + n_emitter_params = len(method.parameters) + n_signal_params = len(obj.parameters) + if n_emitter_params != n_signal_params: + self._parameter_warning( + parent, + obj, + "Emitter method %s for signal %s::%s does not have the " + "same number of arguments (expected: %d)" % (method.symbol, parent.name, obj.name, n_signal_params)) + obj.emitter = None + return False + for idx, signal_param in enumerate(obj.parameters): + method_param = method.parameters[idx + 1] + if signal_param.type.is_equiv(method_param.type): + self._parameter_warning( + parent, + obj, + "Emitter method %s for signal %s::%s does not have the " + "same type of arguments" % (method.symbol, parent.name, obj.name)) + obj.emitter = None + return False return True def _introspectable_property_analysis(self, obj, stack): -- cgit v1.2.1