Allow validate (but not schemars) attributes to have extra values where necessary

schemars/tests/ui/invalid_validation_attrs.rs

@@ -30,6 +30,9 @@ pub struct Struct4(
         regex(path = "baz"),
         regex(pattern = "baz"),
         phone,
+        email(code = "code_str", message = "message"),
+        email = "foo",
+        email,
         email,
         url
     )]

schemars/tests/ui/invalid_validation_attrs.stderr

@@ -82,10 +82,28 @@ error: `schemars(regex(...))` attribute requires `pattern = ...`
 30 |         regex(path = "baz"),
    |         ^^^^^^^^^^^^^^^^^^^
 
-error: schemars attribute cannot contain both `url` and `email`
-  --> tests/ui/invalid_validation_attrs.rs:34:9
+error: unexpected value of schemars email attribute item
+  --> tests/ui/invalid_validation_attrs.rs:33:14
    |
-34 |         url
+33 |         email(code = "code_str", message = "message"),
+   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: unexpected value of schemars email attribute item
+  --> tests/ui/invalid_validation_attrs.rs:34:15
+   |
+34 |         email = "foo",
+   |               ^^^^^^^
+
+error: duplicate schemars attribute item `email`
+  --> tests/ui/invalid_validation_attrs.rs:36:9
+   |
+36 |         email,
+   |         ^^^^^
+
+error: schemars attribute cannot contain both `url` and `email`
+  --> tests/ui/invalid_validation_attrs.rs:37:9
+   |
+37 |         url
    |         ^^^
 
 error: unknown schemars attribute `phone`

schemars/tests/validate.rs

@@ -34,7 +34,7 @@ pub struct Struct {
     contains_str2: String,
     #[validate(email)]
     email_address: String,
-    #[validate(url)]
+    #[validate(url(code = "code_str", message = "message"))]
     homepage: String,
     #[validate(length(min = 1, max = 100))]
     non_empty_str: String,