typing: skip error message when dealing with bottom types

[nit.git] / src / semantize / typing.nit

diff --git a/src/semantize/typing.nit b/src/semantize/typing.nit
index 8dc1845..b4599d0 100644 (file)
--- a/src/semantize/typing.nit
+++ b/src/semantize/typing.nit
@@ -117,6 +117,7 @@ private class TypeVisitor
                        #node.debug("Unsafe typing: expected {sup}, got {sub}")
                        return sup
                end
+               if sup isa MBottomType then return null # Skip error
                if sub.need_anchor then
                        var u = anchor_to(sub)
                        self.modelbuilder.error(node, "Type Error: expected `{sup}`, got `{sub}: {u}`.")
@@ -1126,6 +1127,25 @@ redef class ALoopExpr
 end
 
 redef class AForExpr
+       redef fun accept_typing(v)
+       do
+               v.has_loop = true
+
+               for g in n_groups do
+                       var mtype = v.visit_expr(g.n_expr)
+                       if mtype == null then return
+                       g.do_type_iterator(v, mtype)
+                       if g.is_broken then is_broken = true
+               end
+
+               v.visit_stmt(n_block)
+
+               self.mtype = n_block.mtype
+               self.is_typed = true
+       end
+end
+
+redef class AForGroup
        var coltype: nullable MClassType
 
        var method_iterator: nullable CallSite
@@ -1252,20 +1272,6 @@ redef class AForExpr
                        self.method_successor = v.get_method(self, vtype, "successor", false)
                end
        end
-
-       redef fun accept_typing(v)
-       do
-               v.has_loop = true
-               var mtype = v.visit_expr(n_expr)
-               if mtype == null then return
-
-               self.do_type_iterator(v, mtype)
-
-               v.visit_stmt(n_block)
-
-               self.mtype = n_block.mtype
-               self.is_typed = true
-       end
 end
 
 redef class AWithExpr