use ALIGN for Push::alignment in struct types

Author: bkietz

rust/flatbuffers/src/lib.rs

@@ -52,7 +52,7 @@ pub use crate::builder::{Allocator, DefaultAllocator, FlatBufferBuilder};
 pub use crate::endian_scalar::{emplace_scalar, read_scalar, read_scalar_at, EndianScalar};
 pub use crate::follow::{Follow, FollowStart};
 pub use crate::primitives::*;
-pub use crate::push::Push;
+pub use crate::push::{Push, PushAlignment};
 pub use crate::table::{buffer_has_identifier, Table};
 pub use crate::vector::{follow_cast_ref, Vector, VectorIter};
 pub use crate::verifier::{

src/idl_gen_rust.cpp

@@ -2703,6 +2703,10 @@ class RustGenerator : public BaseGenerator {
         "{{STRUCT_TY}} as *const u8, Self::size());";
     code_ += "        dst.copy_from_slice(src);";
     code_ += "    }";
+    code_ += "    #[inline]";
+    code_ += "    fn alignment() -> PushAlignment {";
+    code_ += "        PushAlignment::new({{ALIGN}})";
+    code_ += "    }";
     code_ += "}";
     code_ += "";