second commit

Author: shazqadeer

Source/Core/AST/AbsyType.cs

@@ -1678,8 +1678,8 @@ public override Type ResolveType(ResolutionContext rc)
       }
 
       // otherwise: this name is not declared anywhere
-      rc.Error(this, "undeclared type: {0}", Name);
-      return Type.Bool; // resolve to "bool" type so that type resolution can continue safely
+      rc.Error(this, "undeclared type: {0} (replacing with \"bool\" to continue resolving)", Name);
+      return Type.Bool;
     }
 
     private List<Type> ResolveArguments(ResolutionContext rc)

Test/test0/Types1.bpl.expect

@@ -1,4 +1,4 @@
-Types1.bpl(8,11): Error: undeclared type: x
-Types1.bpl(9,11): Error: undeclared type: x
-Types1.bpl(9,14): Error: undeclared type: x
+Types1.bpl(8,11): Error: undeclared type: x (replacing with "bool" to continue resolving)
+Types1.bpl(9,11): Error: undeclared type: x (replacing with "bool" to continue resolving)
+Types1.bpl(9,14): Error: undeclared type: x (replacing with "bool" to continue resolving)
 3 name resolution errors detected in Types1.bpl

Test/test20/Prog0.bpl.expect

@@ -1,5 +1,5 @@
 Prog0.bpl(19,10): Error: type variable must occur in map arguments: a
 Prog0.bpl(31,27): Error: more than one declaration of type variable: beta
-Prog0.bpl(34,22): Error: undeclared type: alpha
-Prog0.bpl(35,35): Error: undeclared type: alpha
+Prog0.bpl(34,22): Error: undeclared type: alpha (replacing with "bool" to continue resolving)
+Prog0.bpl(35,35): Error: undeclared type: alpha (replacing with "bool" to continue resolving)
 4 name resolution errors detected in Prog0.bpl

Test/test20/TypeDecls0.bpl.expect

@@ -3,8 +3,8 @@ TypeDecls0.bpl(15,12): Error: more than one declaration of type variable: a
 TypeDecls0.bpl(16,18): Error: more than one declaration of type variable: a
 TypeDecls0.bpl(20,17): Error: type variable must occur in map arguments: b
 TypeDecls0.bpl(24,9): Error: type constructor received wrong number of arguments: C
-TypeDecls0.bpl(26,9): Error: undeclared type: A0
-TypeDecls0.bpl(27,9): Error: undeclared type: F
+TypeDecls0.bpl(26,9): Error: undeclared type: A0 (replacing with "bool" to continue resolving)
+TypeDecls0.bpl(27,9): Error: undeclared type: F (replacing with "bool" to continue resolving)
 TypeDecls0.bpl(30,9): Error: type constructor received wrong number of arguments: E
 TypeDecls0.bpl(32,9): Error: type constructor received wrong number of arguments: E
 TypeDecls0.bpl(34,9): Error: type constructor received wrong number of arguments: E