# * Check property conformance
private class PropertyVerifierVisitor
special AbsSyntaxVisitor
+
+ # The signature currently build
+ readable writable attr _signature_builder: SignatureBuilder
+
+ redef meth visit(n) do n.accept_property_verifier(self)
+
+ init(tc, m)
+ do
+ super
+ _signature_builder = new SignatureBuilder
+ end
+end
+
+# Information about a signature currently build
+private class SignatureBuilder
# Current visited parameter types
- readable writable attr _params: Array[PParam]
+ readable writable attr _params: Array[PParam] = new Array[PParam]
# Visited parameters without type information added
- readable writable attr _untyped_params: Array[PParam]
+ readable writable attr _untyped_params: Array[PParam] = new Array[PParam]
# Position of the current star parameter
- readable writable attr _vararg_rank: Int
+ readable writable attr _vararg_rank: Int = -1
# Current signature
- readable writable attr _signature: MMSignature
-
- redef meth visit(n) do n.accept_property_verifier(self)
-
- init(tc, m) do super
+ readable writable attr _signature: MMSignature = null
end
###############################################################################
end
if prop.signature != null then
# ok
- else if not v.untyped_params.is_empty then
- v.error(v.untyped_params.first, "Error: Untyped parameter.")
+ else if not v.signature_builder.untyped_params.is_empty then
+ v.error(v.signature_builder.untyped_params.first, "Error: Untyped parameter.")
else
prop.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
end
var isig = ip.signature.adaptation_to(v.local_class.get_type)
if s == null then
- if v.params.length != isig.arity then
+ if v.signature_builder.params.length != isig.arity then
#prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
return
end
- for p in v.params do
+ for p in v.signature_builder.params do
var t = isig[p.position]
p.stype = t
if p.position == isig.vararg_rank then
if s == null then
#print "{prop.full_name} inherits signature from {ip.full_name}"
- if v.params.length != isig.arity then
+ if v.signature_builder.params.length != isig.arity then
v.error(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
return
end
- for p in v.params do
+ for p in v.signature_builder.params do
var t = isig[p.position]
p.stype = t
if p.position == isig.vararg_rank then
redef meth accept_property_verifier(v)
do
- v.params = new Array[PParam]
- v.untyped_params = new Array[PParam]
- v.signature = null
- v.vararg_rank = -1
-
+ v.signature_builder = new SignatureBuilder
super
- if v.signature == null then
+ if v.signature_builder.signature == null then
#_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
else
- _method.signature = v.signature
+ _method.signature = v.signature_builder.signature
end
var visibility_level = 1
if n_visibility != null and n_visibility.level > 1 then
redef meth accept_property_verifier(v)
do
super
- if not v.untyped_params.is_empty then
- if v.untyped_params.first != v.params.first or n_type != null then
- v.error(v.untyped_params.first, "Syntax error: untyped parameter.")
+ if not v.signature_builder.untyped_params.is_empty then
+ if v.signature_builder.untyped_params.first != v.signature_builder.params.first or n_type != null then
+ v.error(v.signature_builder.untyped_params.first, "Syntax error: untyped parameter.")
return
end
- else if not v.params.is_empty or n_type != null then
+ else if not v.signature_builder.params.is_empty or n_type != null then
var pars = new Array[MMType]
- for p in v.params do
+ for p in v.signature_builder.params do
pars.add(p.stype)
end
var ret: MMType = null
if n_type != null then
ret = n_type.get_stype(v)
end
- v.signature = new MMSignature(pars, ret, v.local_class.get_type)
- if v.vararg_rank >= 0 then
- v.signature.vararg_rank = v.vararg_rank
+ v.signature_builder.signature = new MMSignature(pars, ret, v.local_class.get_type)
+ if v.signature_builder.vararg_rank >= 0 then
+ v.signature_builder.signature.vararg_rank = v.signature_builder.vararg_rank
end
end
end
redef meth accept_property_verifier(v)
do
super
- _position = v.params.length
+ _position = v.signature_builder.params.length
_variable = new ParamVariable(n_id.to_symbol, self)
- v.params.add(self)
- v.untyped_params.add(self)
+ v.signature_builder.params.add(self)
+ v.signature_builder.untyped_params.add(self)
if n_type != null then
var stype = n_type.get_stype(v)
- for p in v.untyped_params do
+ for p in v.signature_builder.untyped_params do
p.stype = stype
if is_vararg then
- if v.vararg_rank == -1 then
- v.vararg_rank = p.position
+ if v.signature_builder.vararg_rank == -1 then
+ v.signature_builder.vararg_rank = p.position
else
v.error(self, "Error: A vararg parameter is already defined.")
end
end
p.variable.stype = stype
end
- v.untyped_params.clear
+ v.signature_builder.untyped_params.clear
end
end
nitlanguage / nit.git / commitdiff