[PATCH 6/8] bql: add prelude

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 rust/bql/meson.build              | 1 +
 rust/bql/src/lib.rs               | 5 +++++
 rust/bql/src/prelude.rs           | 4 ++++
 rust/chardev/src/chardev.rs       | 2 +-
 rust/hw/char/pl011/src/device.rs  | 2 +-
 rust/hw/core/tests/tests.rs       | 2 +-
 rust/hw/timer/hpet/src/device.rs  | 2 +-
 rust/migration/src/migratable.rs  | 2 +-
 rust/tests/tests/vmstate_tests.rs | 2 +-
 9 files changed, 16 insertions(+), 6 deletions(-)
 create mode 100644 rust/bql/src/prelude.rs

diff --git a/rust/bql/meson.build b/rust/bql/meson.build
index 091372dd7b6..90aaadaa6d6 100644
--- a/rust/bql/meson.build
+++ b/rust/bql/meson.build
@@ -31,6 +31,7 @@ _bql_rs = static_library(
       'src/lib.rs',
       'src/bindings.rs',
       'src/cell.rs',
+      'src/prelude.rs',
     ],
     {'.': _bql_bindings_inc_rs}
   ),
diff --git a/rust/bql/src/lib.rs b/rust/bql/src/lib.rs
index ef08221e9c1..d2fea5db1ac 100644
--- a/rust/bql/src/lib.rs
+++ b/rust/bql/src/lib.rs
@@ -6,6 +6,11 @@
 mod cell;
 pub use cell::*;
 
+// preserve one-item-per-"use" syntax, it is clearer
+// for prelude-like modules
+#[rustfmt::skip]
+pub mod prelude;
+
 /// An internal function that is used by doctests.
 pub fn start_test() {
     // SAFETY: integration tests are run with --test-threads=1, while
diff --git a/rust/bql/src/prelude.rs b/rust/bql/src/prelude.rs
new file mode 100644
index 00000000000..42031ec18ab
--- /dev/null
+++ b/rust/bql/src/prelude.rs
@@ -0,0 +1,4 @@
+//! Essential types and traits intended for blanket imports.
+
+pub use crate::cell::BqlCell;
+pub use crate::cell::BqlRefCell;
diff --git a/rust/chardev/src/chardev.rs b/rust/chardev/src/chardev.rs
index f0b7975dbf7..fb9674b3fb4 100644
--- a/rust/chardev/src/chardev.rs
+++ b/rust/chardev/src/chardev.rs
@@ -18,7 +18,7 @@
     slice,
 };
 
-use bql::{BqlRefCell, BqlRefMut};
+use bql::{prelude::*, BqlRefMut};
 use common::{callbacks::FnCall, errno, Opaque};
 use qom::prelude::*;
 
diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index ff929e60993..be1bdf5ab12 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -4,7 +4,7 @@
 
 use std::{ffi::CStr, mem::size_of};
 
-use bql::BqlRefCell;
+use bql::prelude::*;
 use chardev::prelude::*;
 use common::prelude::*;
 use hwcore::{prelude::*, ClockEvent, IRQState};
diff --git a/rust/hw/core/tests/tests.rs b/rust/hw/core/tests/tests.rs
index f38376d0016..e60c9d018f5 100644
--- a/rust/hw/core/tests/tests.rs
+++ b/rust/hw/core/tests/tests.rs
@@ -4,7 +4,7 @@
 
 use std::{ffi::CStr, ptr::addr_of};
 
-use bql::BqlCell;
+use bql::prelude::*;
 use hwcore::prelude::*;
 use migration::prelude::*;
 use qom::{prelude::*, ObjectImpl, ParentField};
diff --git a/rust/hw/timer/hpet/src/device.rs b/rust/hw/timer/hpet/src/device.rs
index 4ff1779a3d2..b7153a46e31 100644
--- a/rust/hw/timer/hpet/src/device.rs
+++ b/rust/hw/timer/hpet/src/device.rs
@@ -10,7 +10,7 @@
     slice::from_ref,
 };
 
-use bql::{BqlCell, BqlRefCell};
+use bql::prelude::*;
 use common::prelude::*;
 use hwcore::prelude::*;
 use migration::{self, prelude::*};
diff --git a/rust/migration/src/migratable.rs b/rust/migration/src/migratable.rs
index ded6fe8f4a6..ce603867502 100644
--- a/rust/migration/src/migratable.rs
+++ b/rust/migration/src/migratable.rs
@@ -9,7 +9,7 @@
     sync::{Arc, Mutex},
 };
 
-use bql::{BqlCell, BqlRefCell};
+use bql::prelude::*;
 use common::Zeroable;
 
 use crate::{
diff --git a/rust/tests/tests/vmstate_tests.rs b/rust/tests/tests/vmstate_tests.rs
index c3f9e1c7436..87176a80990 100644
--- a/rust/tests/tests/vmstate_tests.rs
+++ b/rust/tests/tests/vmstate_tests.rs
@@ -9,7 +9,7 @@
     slice,
 };
 
-use bql::BqlCell;
+use bql::prelude::*;
 use common::Opaque;
 use migration::{
     bindings::{
-- 
2.51.1