Add KnownLayout::validate_cast

TODO: Message body

Co-authored-by: Jack Wrenn <[email protected]>

Author: joshlf

Cargo.toml

@@ -55,6 +55,8 @@ optional = true
 zerocopy-derive = { version = "=0.7.3", path = "zerocopy-derive" }
 
 [dev-dependencies]
+assert_matches = "1.5"
+itertools = "0.11"
 rand = { version = "0.8.5", features = ["small_rng"] }
 rustversion = "1.0"
 static_assertions = "1.1"