unused: blank parameters are used

dominikh · Jan 30, 2023 · c30b155 · c30b155
1 parent 9397796
commit c30b155
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Showing 2 changed files with 12 additions and 0 deletions.
diff --git a/unused/testdata/src/example.com/blank-function-parameter/blank.go b/unused/testdata/src/example.com/blank-function-parameter/blank.go
@@ -0,0 +1,6 @@
+package pkg
+
+type customType int //@ used("customType", true)
+
+func Foo(customType) {} //@ used("Foo", true), used("", true)
+func bar(customType) {} //@ used("bar", false), quiet("")
diff --git a/unused/unused.go b/unused/unused.go
@@ -757,6 +757,9 @@ func (g *graph) read(node ast.Node, by types.Object) {
 		fn := g.info.TypeOf(node).(*types.Signature)
 		for params, i := fn.Params(), 0; i < params.Len(); i++ {
 			g.see(params.At(i), by)
+			if params.At(i).Name() == "" {
+				g.use(params.At(i), by)
+			}
 		}
 
 		g.block(node.Body, by)
@@ -1183,6 +1186,9 @@ func (g *graph) decl(decl ast.Decl, by types.Object) {
 		fn := g.info.TypeOf(decl.Name).(*types.Signature)
 		for params, i := fn.Params(), 0; i < params.Len(); i++ {
 			g.see(params.At(i), obj)
+			if params.At(i).Name() == "" {
+				g.use(params.At(i), obj)
+			}
 		}
 
 		if decl.Name.Name == "_" {