check for unknown named bindings

src/Convert/ResolveBindings.hs

@@ -17,6 +17,7 @@ module Convert.ResolveBindings
     ) where
 
 import Control.Monad.Writer.Strict
+import Data.List (intercalate, (\\))
 import qualified Data.Map.Strict as Map
 
 import Convert.ExprUtils (simplify)
@@ -121,5 +122,12 @@ resolveBindings location available bindings =
         error $ "too many bindings specified for " ++ location
     else if null $ fst $ head bindings then
         zip available $ map snd bindings
+    else if not $ null unknowns then
+        error $ "unknown binding" ++ unknownsPlural ++ " "
+            ++ unknownsStr ++ " specified for " ++ location
     else
         bindings
+    where
+        unknowns = map fst bindings \\ available
+        unknownsPlural = if length unknowns == 1 then "" else "s"
+        unknownsStr = intercalate ", " $ map show unknowns

test/error/binding_not_found_class.sv

@@ -0,0 +1,10 @@
+// pattern: unknown binding "R" specified for parameters in class specialization of "example"
+class example #(
+    parameter P = 1,
+    parameter Q = 1
+);
+    typedef logic [P * Q:0] T;
+endclass
+module top;
+    example#(.P(1), .R(2))::T x;
+endmodule

test/error/binding_not_found_param.sv

@@ -0,0 +1,8 @@
+// pattern: unknown binding "R" specified for parameter overrides in instance "e" of "example"
+module example;
+    parameter P = 1;
+    parameter Q = 1;
+endmodule
+module top;
+    example #(.P(1), .R(2)) e();
+endmodule

test/error/binding_not_found_port.sv

@@ -0,0 +1,8 @@
+// pattern: unknown bindings "w", "z" specified for port connections in instance "e" of "example"
+module example(
+    input x, y
+);
+endmodule
+module top;
+    example e(.w(1), .z(1'b0));
+endmodule