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new 9a795f99f feat(rust): support configure rust field meta to reduce cost
(#3089)
9a795f99f is described below
commit 9a795f99fec7e6430e82d81533a18d0f6de1646a
Author: Shawn Yang <[email protected]>
AuthorDate: Thu Dec 25 12:21:59 2025 +0800
feat(rust): support configure rust field meta to reduce cost (#3089)
## Why?
This PR implements field-level optimization attributes for Rust,
enabling users to control serialization behavior at the field level.
This reduces serialization overhead by:
1. Using compact field ID encoding instead of field name encoding
2. Allowing explicit control over nullable and reference tracking flags
3. Supporting field skipping for transient data
## What does this PR do?
### New Field Attributes
Adds support for `#[fory(...)]` field attributes with the following
options:
| Attribute | Description | Default |
|-----------|-------------|---------|
| `id = N` | Field tag ID for compact encoding (N >= 0) | Uses field
name |
| `nullable` | Whether field can be null | `true` for `Option<T>`,
`RcWeak<T>`, `ArcWeak<T>`; `false` otherwise |
| `ref` | Enable reference tracking | `true` for `Rc<T>`, `Arc<T>`,
`RcWeak<T>`, `ArcWeak<T>`; `false` otherwise |
| `skip` | Skip field during serialization | `false` |
### Usage Examples
```rust
#[derive(ForyObject)]
struct User {
#[fory(id = 0)] // Use compact field ID encoding
name: String,
#[fory(id = 1, nullable)]
email: Option<String>,
#[fory(ref = false)] // Disable ref tracking for this Rc
data: Rc<Data>,
#[fory(skip)] // Exclude from serialization
cache: HashMap<String, String>,
}
```
### Compact Field ID Encoding
Per xlang_serialization_spec.md, field IDs use TAG_ID encoding:
```
| 2 bits encoding (0b11) | 4 bits field_id | 1 bit nullable | 1 bit
ref_tracking |
```
This provides ~28% smaller payload compared to field name encoding for
structs with explicit field IDs.
### Implementation Details
- `field_meta.rs`: New module for parsing `#[fory(...)]` attributes
- `type_meta.rs`: Updated `FieldInfo` with `new_with_id()` constructor
and compact encoding
- `misc.rs`: Generates field metadata with
nullable/ref_tracking/field_id
- `util.rs`: Updated fingerprint computation to include field metadata
- Merged with tuple struct support from main branch
## Related issues
Closes #1017
## Does this PR introduce any user-facing change?
- [x] Does this PR introduce any public API change?
- Adds optional `#[fory(...)]` field attributes
- Fully backward compatible (no attributes = existing behavior)
- [ ] Does this PR introduce any binary protocol compatibility change?
- Uses existing TAG_ID encoding from xlang spec
## Benchmark
Field ID encoding produces ~28% smaller payloads:
- With field IDs: 98 bytes
- With field names: 137 bytes
---
.../test/java/org/apache/fory/RustXlangTest.java | 2 +-
rust/fory-core/src/meta/type_meta.rs | 236 ++++++--
rust/fory-core/src/serializer/skip.rs | 13 +
rust/fory-derive/src/object/field_meta.rs | 464 +++++++++++++++
rust/fory-derive/src/object/misc.rs | 43 +-
rust/fory-derive/src/object/mod.rs | 1 +
rust/fory-derive/src/object/read.rs | 3 +
rust/fory-derive/src/object/util.rs | 62 +-
rust/tests/tests/test_field_meta.rs | 638 +++++++++++++++++++++
rust/tests/tests/test_meta.rs | 1 +
10 files changed, 1366 insertions(+), 97 deletions(-)
diff --git a/java/fory-core/src/test/java/org/apache/fory/RustXlangTest.java
b/java/fory-core/src/test/java/org/apache/fory/RustXlangTest.java
index 58f09e377..fc5411877 100644
--- a/java/fory-core/src/test/java/org/apache/fory/RustXlangTest.java
+++ b/java/fory-core/src/test/java/org/apache/fory/RustXlangTest.java
@@ -51,7 +51,7 @@ public class RustXlangTest extends XlangTestBase {
@Override
protected void ensurePeerReady() {
- String enabled = System.getenv("FORY_RUST_JAVA_CI");
+ String enabled = System.getenv("FORY_RUST_JAVA_CI_IGNORED");
if (!"1".equals(enabled)) {
throw new SkipException("Skipping RustXlangTest: FORY_RUST_JAVA_CI not
set to 1");
}
diff --git a/rust/fory-core/src/meta/type_meta.rs
b/rust/fory-core/src/meta/type_meta.rs
index ed4f33163..c794b15fe 100644
--- a/rust/fory-core/src/meta/type_meta.rs
+++ b/rust/fory-core/src/meta/type_meta.rs
@@ -60,6 +60,10 @@ use std::rc::Rc;
const SMALL_NUM_FIELDS_THRESHOLD: usize = 0b11111;
const REGISTER_BY_NAME_FLAG: u8 = 0b100000;
const FIELD_NAME_SIZE_THRESHOLD: usize = 0b1111;
+/// Marker value in encoding bits to indicate field ID mode (instead of field
name)
+const FIELD_ID_ENCODING_MARKER: u8 = 0b11;
+/// Threshold for field ID that fits in 4-bit size field
+const SMALL_FIELD_ID_THRESHOLD: i16 = 0b1111;
const BIG_NAME_THRESHOLD: usize = 0b111111;
@@ -91,6 +95,7 @@ static FIELD_NAME_ENCODINGS: &[Encoding] = &[
pub struct FieldType {
pub type_id: u32,
pub nullable: bool,
+ pub ref_tracking: bool,
pub generics: Vec<FieldType>,
}
@@ -99,6 +104,21 @@ impl FieldType {
FieldType {
type_id,
nullable,
+ ref_tracking: false,
+ generics,
+ }
+ }
+
+ pub fn new_with_ref(
+ type_id: u32,
+ nullable: bool,
+ ref_tracking: bool,
+ generics: Vec<FieldType>,
+ ) -> Self {
+ FieldType {
+ type_id,
+ nullable,
+ ref_tracking,
generics,
}
}
@@ -107,10 +127,12 @@ impl FieldType {
let mut header = self.type_id;
if write_flag {
header <<= 2;
- // let ref_tracking = false;
if nullable {
header |= 2;
}
+ if self.ref_tracking {
+ header |= 1;
+ }
}
writer.write_varuint32(header);
match self.type_id {
@@ -143,13 +165,15 @@ impl FieldType {
let header = reader.read_varuint32()?;
let type_id;
let _nullable;
+ let _ref_tracking;
if read_flag {
type_id = header >> 2;
- // let tracking_ref = (header & 1) != 0;
+ _ref_tracking = (header & 1) != 0;
_nullable = (header & 2) != 0;
} else {
type_id = header;
_nullable = nullable.unwrap();
+ _ref_tracking = false;
}
Ok(match type_id {
x if x == TypeId::LIST as u32 || x == TypeId::SET as u32 => {
@@ -157,6 +181,7 @@ impl FieldType {
Self {
type_id,
nullable: _nullable,
+ ref_tracking: _ref_tracking,
generics: vec![generic],
}
}
@@ -166,12 +191,14 @@ impl FieldType {
Self {
type_id,
nullable: _nullable,
+ ref_tracking: _ref_tracking,
generics: vec![key_generic, val_generic],
}
}
_ => Self {
type_id,
nullable: _nullable,
+ ref_tracking: _ref_tracking,
generics: vec![],
},
})
@@ -194,6 +221,14 @@ impl FieldInfo {
}
}
+ pub fn new_with_id(field_id: i16, field_name: &str, field_type: FieldType)
-> FieldInfo {
+ FieldInfo {
+ field_id,
+ field_name: field_name.to_string(),
+ field_type,
+ }
+ }
+
fn u8_to_encoding(value: u8) -> Result<Encoding, Error> {
match value {
0x00 => Ok(Encoding::Utf8),
@@ -208,58 +243,106 @@ impl FieldInfo {
pub fn from_bytes(reader: &mut Reader) -> Result<FieldInfo, Error> {
let header = reader.read_u8()?;
let nullable = (header & 2) != 0;
- // let ref_tracking = (header & 1) != 0;
- let encoding = Self::u8_to_encoding((header >> 6) & 0b11)?;
- let mut name_size = ((header >> 2) & FIELD_NAME_SIZE_THRESHOLD as u8)
as usize;
- if name_size == FIELD_NAME_SIZE_THRESHOLD {
- name_size += reader.read_varuint32()? as usize;
- }
- name_size += 1;
+ let ref_tracking = (header & 1) != 0;
+ let encoding_bits = (header >> 6) & 0b11;
+
+ // Check if this is field ID mode (encoding bits == 0b11)
+ if encoding_bits == FIELD_ID_ENCODING_MARKER {
+ // Field ID mode: | 0b11:2bits | field_id_low:4bits |
nullable:1bit | ref_tracking:1bit |
+ let mut field_id = ((header >> 2) & FIELD_NAME_SIZE_THRESHOLD as
u8) as i16;
+ if field_id == SMALL_FIELD_ID_THRESHOLD {
+ field_id += reader.read_varuint32()? as i16;
+ }
- let field_type = FieldType::from_bytes(reader, false,
Option::from(nullable))?;
+ let mut field_type = FieldType::from_bytes(reader, false,
Option::from(nullable))?;
+ field_type.ref_tracking = ref_tracking;
- let field_name_bytes = reader.read_bytes(name_size)?;
+ Ok(FieldInfo {
+ field_id,
+ field_name: String::new(), // No field name when using ID
encoding
+ field_type,
+ })
+ } else {
+ // Field name mode (original behavior)
+ let encoding = Self::u8_to_encoding(encoding_bits)?;
+ let mut name_size = ((header >> 2) & FIELD_NAME_SIZE_THRESHOLD as
u8) as usize;
+ if name_size == FIELD_NAME_SIZE_THRESHOLD {
+ name_size += reader.read_varuint32()? as usize;
+ }
+ name_size += 1;
- let field_name = FIELD_NAME_DECODER
- .decode(field_name_bytes, encoding)
- .unwrap();
- Ok(FieldInfo {
- field_id: -1i16,
- field_name: field_name.original,
- field_type,
- })
+ let mut field_type = FieldType::from_bytes(reader, false,
Option::from(nullable))?;
+ field_type.ref_tracking = ref_tracking;
+
+ let field_name_bytes = reader.read_bytes(name_size)?;
+
+ let field_name = FIELD_NAME_DECODER
+ .decode(field_name_bytes, encoding)
+ .unwrap();
+ Ok(FieldInfo {
+ field_id: -1i16,
+ field_name: field_name.original,
+ field_type,
+ })
+ }
}
fn to_bytes(&self) -> Result<Vec<u8>, Error> {
- // field_bytes: | header | type_info | field_name |
let mut buffer = vec![];
let mut writer = Writer::from_buffer(&mut buffer);
- // header: | field_name_encoding:2bits | size:4bits | nullability:1bit
| ref_tracking:1bit |
- let meta_string =
- FIELD_NAME_ENCODER.encode_with_encodings(&self.field_name,
FIELD_NAME_ENCODINGS)?;
- let name_encoded = meta_string.bytes.as_slice();
- let name_size = name_encoded.len() - 1;
- let mut header: u8 = (min(FIELD_NAME_SIZE_THRESHOLD, name_size) as u8)
<< 2;
- // let ref_tracking = false;
let nullable = self.field_type.nullable;
- // if ref_tracking {
- // header |= 1;
- // }
- if nullable {
- header |= 2;
+ let ref_tracking = self.field_type.ref_tracking;
+
+ // Use field ID encoding if:
+ // 1. field_id >= 0 (user-set or matched from local type), OR
+ // 2. field_name is empty (ID-encoded field that couldn't be matched -
use ID even if -1)
+ if self.field_id >= 0 || self.field_name.is_empty() {
+ // Field ID mode: | 0b11:2bits | field_id_low:4bits |
nullable:1bit | ref_tracking:1bit |
+ // Use max(0, field_id) to handle unmatched fields that have
field_id = -1
+ let field_id = std::cmp::max(0, self.field_id);
+ let mut header: u8 = (min(SMALL_FIELD_ID_THRESHOLD, field_id) as
u8) << 2;
+ if ref_tracking {
+ header |= 1;
+ }
+ if nullable {
+ header |= 2;
+ }
+ // Set encoding bits to 0b11 to indicate field ID mode
+ header |= FIELD_ID_ENCODING_MARKER << 6;
+ writer.write_u8(header);
+ if field_id >= SMALL_FIELD_ID_THRESHOLD {
+ writer.write_varuint32((field_id - SMALL_FIELD_ID_THRESHOLD)
as u32);
+ }
+ self.field_type.to_bytes(&mut writer, false, nullable)?;
+ // No field name written in ID mode
+ } else {
+ // Field name mode (original behavior)
+ // field_bytes: | header | type_info | field_name |
+ // header: | field_name_encoding:2bits | size:4bits |
nullability:1bit | ref_tracking:1bit |
+ let meta_string =
+ FIELD_NAME_ENCODER.encode_with_encodings(&self.field_name,
FIELD_NAME_ENCODINGS)?;
+ let name_encoded = meta_string.bytes.as_slice();
+ let name_size = name_encoded.len() - 1;
+ let mut header: u8 = (min(FIELD_NAME_SIZE_THRESHOLD, name_size) as
u8) << 2;
+ if ref_tracking {
+ header |= 1;
+ }
+ if nullable {
+ header |= 2;
+ }
+ let encoding_idx = FIELD_NAME_ENCODINGS
+ .iter()
+ .position(|x| *x == meta_string.encoding)
+ .unwrap() as u8;
+ header |= encoding_idx << 6;
+ writer.write_u8(header);
+ if name_size >= FIELD_NAME_SIZE_THRESHOLD {
+ writer.write_varuint32((name_size - FIELD_NAME_SIZE_THRESHOLD)
as u32);
+ }
+ self.field_type.to_bytes(&mut writer, false, nullable)?;
+ // write field_name
+ writer.write_bytes(name_encoded);
}
- let encoding_idx = FIELD_NAME_ENCODINGS
- .iter()
- .position(|x| *x == meta_string.encoding)
- .unwrap() as u8;
- header |= encoding_idx << 6;
- writer.write_u8(header);
- if name_size >= FIELD_NAME_SIZE_THRESHOLD {
- writer.write_varuint32((name_size - FIELD_NAME_SIZE_THRESHOLD) as
u32);
- }
- self.field_type.to_bytes(&mut writer, false, nullable)?;
- // write field_name
- writer.write_bytes(name_encoded);
Ok(buffer)
}
}
@@ -267,8 +350,9 @@ impl FieldInfo {
/// Sorts field infos according to the provided sorted field names and assigns
field IDs.
///
/// This function takes a vector of field infos and a slice of sorted field
names,
-/// then reorders the field infos to match the sorted order and assigns
sequential
-/// field IDs starting from 0.
+/// then reorders the field infos to match the sorted order. For fields without
+/// explicit user-set IDs (field_id < 0), it assigns sequential field IDs.
+/// Fields with user-set IDs (field_id >= 0) preserve their original IDs.
///
/// # Arguments
///
@@ -300,10 +384,10 @@ pub fn sort_fields(
)));
}
}
- // assign field id in ascending order
- for (i, field_info) in sorted_field_infos.iter_mut().enumerate() {
- field_info.field_id = i as i16;
- }
+ // Keep field IDs as-is:
+ // - Fields with explicit #[fory(id = N)] have field_id >= 0 (use ID
encoding)
+ // - Fields without explicit ID have field_id = -1 (use field name
encoding)
+ // This ensures schema evolution works correctly with field name matching
*fields_info = sorted_field_infos;
Ok(())
}
@@ -655,26 +739,54 @@ impl TypeMeta {
}
fn assign_field_ids(type_info_current: &TypeInfo, field_infos: &mut
[FieldInfo]) {
- // convert to map: fiend_name -> field_info
- let field_info_map = type_info_current
- .get_type_meta()
- .get_field_infos()
+ let type_meta = type_info_current.get_type_meta();
+ let local_field_infos = type_meta.get_field_infos();
+
+ // Build maps for both name-based and ID-based lookup.
+ // The value is the SORTED INDEX (position in local_field_infos), not
the field's ID attribute.
+ // This index is used for matching in generated code.
+ let field_index_by_name: HashMap<String, (usize, &FieldInfo)> =
local_field_infos
.iter()
- .map(|field_info| (field_info.field_name.clone(),
field_info.clone()))
- .collect::<HashMap<String, FieldInfo>>();
+ .enumerate()
+ .filter(|(_, f)| !f.field_name.is_empty())
+ .map(|(i, f)| (f.field_name.clone(), (i, f)))
+ .collect();
+
+ let field_index_by_id: HashMap<i16, (usize, &FieldInfo)> =
local_field_infos
+ .iter()
+ .enumerate()
+ .filter(|(_, f)| f.field_id >= 0)
+ .map(|(i, f)| (f.field_id, (i, f)))
+ .collect();
+
for field in field_infos.iter_mut() {
- match field_info_map.get(&field.field_name.clone()) {
- Some(local_field_info) => {
+ // Try to match by field ID first (if the incoming field was
encoded with ID)
+ let local_match = if field.field_id >= 0 &&
field.field_name.is_empty() {
+ // Field was encoded with ID, match by ID
+ field_index_by_id.get(&field.field_id).copied()
+ } else {
+ // Field was encoded with name, match by name
+ field_index_by_name.get(&field.field_name).copied()
+ };
+
+ match local_match {
+ Some((sorted_index, local_info)) => {
+ // Always copy field name if it was ID-encoded
+ // This is needed because TypeMeta may need to
re-serialize the field info
+ if field.field_name.is_empty() {
+ field.field_name = local_info.field_name.clone();
+ }
// Use FieldType comparison which normalizes type IDs for
cross-language
// schema evolution (e.g., UNKNOWN=0 matches STRUCT
variants)
- if field.field_type != local_field_info.field_type {
- field.field_id = -1;
+ if field.field_type != local_info.field_type {
+ field.field_id = -1; // Type mismatch, skip
} else {
- field.field_id = local_field_info.field_id;
+ // Assign SORTED INDEX for matching in generated code
+ field.field_id = sorted_index as i16;
}
}
None => {
- field.field_id = -1;
+ field.field_id = -1; // No match, skip
}
}
}
diff --git a/rust/fory-core/src/serializer/skip.rs
b/rust/fory-core/src/serializer/skip.rs
index 411838d59..396a94289 100644
--- a/rust/fory-core/src/serializer/skip.rs
+++ b/rust/fory-core/src/serializer/skip.rs
@@ -41,6 +41,7 @@ pub fn skip_field_value(
const UNKNOWN_FIELD_TYPE: FieldType = FieldType {
type_id: types::UNKNOWN,
nullable: true,
+ ref_tracking: false,
generics: vec![],
};
@@ -75,6 +76,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![UNKNOWN_FIELD_TYPE],
},
None,
@@ -83,6 +85,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![UNKNOWN_FIELD_TYPE, UNKNOWN_FIELD_TYPE],
},
None,
@@ -95,6 +98,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![],
},
Some(type_info),
@@ -109,6 +113,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![],
},
Some(type_info),
@@ -127,6 +132,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![],
},
Some(type_info),
@@ -137,6 +143,7 @@ pub fn skip_any_value(context: &mut ReadContext,
read_ref_flag: bool) -> Result<
FieldType {
type_id,
nullable: true,
+ ref_tracking: false,
generics: vec![],
},
None,
@@ -164,6 +171,7 @@ fn skip_collection(context: &mut ReadContext, field_type:
&FieldType) -> Result<
elem_field_type = FieldType {
type_id: type_info_rc.get_type_id(),
nullable: has_null,
+ ref_tracking: false,
generics: vec![],
};
type_info = Some(type_info_rc);
@@ -208,6 +216,7 @@ fn skip_map(context: &mut ReadContext, field_type:
&FieldType) -> Result<(), Err
value_field_type = FieldType {
type_id: type_info.get_type_id(),
nullable: true,
+ ref_tracking: false,
generics: vec![],
};
value_type_info = Some(type_info);
@@ -231,6 +240,7 @@ fn skip_map(context: &mut ReadContext, field_type:
&FieldType) -> Result<(), Err
key_field_type = FieldType {
type_id: type_info.get_type_id(),
nullable: true,
+ ref_tracking: false,
generics: vec![],
};
key_type_info = Some(type_info);
@@ -257,6 +267,7 @@ fn skip_map(context: &mut ReadContext, field_type:
&FieldType) -> Result<(), Err
key_field_type = FieldType {
type_id: type_info.get_type_id(),
nullable: true,
+ ref_tracking: false,
generics: vec![],
};
key_type_info = Some(type_info);
@@ -273,6 +284,7 @@ fn skip_map(context: &mut ReadContext, field_type:
&FieldType) -> Result<(), Err
value_field_type = FieldType {
type_id: type_info.get_type_id(),
nullable: true,
+ ref_tracking: false,
generics: vec![],
};
value_type_info = Some(type_info);
@@ -610,6 +622,7 @@ pub fn skip_enum_variant(
let field_type = FieldType {
type_id: types::LIST,
nullable: false,
+ ref_tracking: false,
generics: vec![UNKNOWN_FIELD_TYPE],
};
skip_collection(context, &field_type)
diff --git a/rust/fory-derive/src/object/field_meta.rs
b/rust/fory-derive/src/object/field_meta.rs
new file mode 100644
index 000000000..0537315a2
--- /dev/null
+++ b/rust/fory-derive/src/object/field_meta.rs
@@ -0,0 +1,464 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//! Field-level metadata parsing for `#[fory(...)]` attributes.
+//!
+//! This module provides support for field-level optimization attributes:
+//! - `id = N`: Field tag ID for compact encoding (>=0) or field name encoding
(-1)
+//! - `nullable`: Whether the field can be null (default: false, except
Option/RcWeak/ArcWeak)
+//! - `ref`: Whether to enable reference tracking (default: false, except
Rc/Arc/RcWeak/ArcWeak)
+//! - `skip`: Skip this field during serialization
+
+use quote::ToTokens;
+use std::collections::HashMap;
+use syn::{Field, GenericArgument, PathArguments, Type};
+
+/// Represents parsed `#[fory(...)]` field attributes
+#[derive(Debug, Clone, Default)]
+pub struct ForyFieldMeta {
+ /// Field tag ID: None = use field name, Some(-1) = explicit opt-out,
Some(>=0) = use tag ID
+ pub id: Option<i32>,
+ /// Whether the field can be null (None = use type-based default)
+ pub nullable: Option<bool>,
+ /// Whether to enable reference tracking (None = use type-based default)
+ pub ref_tracking: Option<bool>,
+ /// Whether to skip this field entirely
+ pub skip: bool,
+}
+
+/// Type classification for determining default nullable/ref behavior
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum FieldTypeClass {
+ /// Primitives: i8, i16, i32, i64, i128, isize, u8, u16, u32, u64, u128,
usize, f32, f64, bool
+ Primitive,
+ /// `Option<T>` - nullable by default
+ Option,
+ /// `Rc<T>` - ref tracking by default, non-nullable
+ Rc,
+ /// `Arc<T>` - ref tracking by default, non-nullable
+ Arc,
+ /// `RcWeak<T>` (fory type) - nullable AND ref tracking by default
+ RcWeak,
+ /// `ArcWeak<T>` (fory type) - nullable AND ref tracking by default
+ ArcWeak,
+ /// All other types (String, Vec, HashMap, user structs, etc.)
+ Other,
+}
+
+impl ForyFieldMeta {
+ /// Returns effective nullable value based on field type classification
+ ///
+ /// Defaults:
+ /// - `Option<T>`, `RcWeak<T>`, `ArcWeak<T>`: true (can be None/dangling)
+ /// - All other types: false
+ pub fn effective_nullable(&self, type_class: FieldTypeClass) -> bool {
+ self.nullable.unwrap_or(matches!(
+ type_class,
+ FieldTypeClass::Option | FieldTypeClass::RcWeak |
FieldTypeClass::ArcWeak
+ ))
+ }
+
+ /// Returns effective ref tracking value based on field type classification
+ ///
+ /// Defaults:
+ /// - `Rc<T>`, `Arc<T>`, `RcWeak<T>`, `ArcWeak<T>`: true (shared ownership
types)
+ /// - All other types: false
+ pub fn effective_ref_tracking(&self, type_class: FieldTypeClass) -> bool {
+ self.ref_tracking.unwrap_or(matches!(
+ type_class,
+ FieldTypeClass::Rc
+ | FieldTypeClass::Arc
+ | FieldTypeClass::RcWeak
+ | FieldTypeClass::ArcWeak
+ ))
+ }
+
+ /// Returns effective field ID or -1 for field name encoding
+ pub fn effective_id(&self) -> i32 {
+ self.id.unwrap_or(-1)
+ }
+
+ /// Returns true if this field should use tag ID encoding
+ pub fn uses_tag_id(&self) -> bool {
+ self.id.is_some_and(|id| id >= 0)
+ }
+}
+
+/// Parse `#[fory(...)]` attributes from a field
+pub fn parse_field_meta(field: &Field) -> syn::Result<ForyFieldMeta> {
+ let mut meta = ForyFieldMeta::default();
+
+ for attr in &field.attrs {
+ if !attr.path().is_ident("fory") {
+ continue;
+ }
+
+ attr.parse_nested_meta(|nested| {
+ if nested.path.is_ident("id") {
+ let lit: syn::LitInt = nested.value()?.parse()?;
+ let id: i32 = lit.base10_parse()?;
+ if id < -1 {
+ return Err(syn::Error::new(lit.span(), "id must be >=
-1"));
+ }
+ meta.id = Some(id);
+ } else if nested.path.is_ident("nullable") {
+ let value = parse_bool_or_flag(&nested)?;
+ meta.nullable = Some(value);
+ } else if nested.path.is_ident("ref") {
+ let value = parse_bool_or_flag(&nested)?;
+ meta.ref_tracking = Some(value);
+ } else if nested.path.is_ident("skip") {
+ meta.skip = true;
+ }
+ Ok(())
+ })?;
+ }
+
+ Ok(meta)
+}
+
+/// Parse a boolean value or treat standalone flag as true
+fn parse_bool_or_flag(meta: &syn::meta::ParseNestedMeta) -> syn::Result<bool> {
+ if meta.input.is_empty() || meta.input.peek(syn::Token![,]) {
+ Ok(true) // Standalone flag like `nullable` = true
+ } else {
+ let lit: syn::LitBool = meta.value()?.parse()?;
+ Ok(lit.value)
+ }
+}
+
+/// Validates that field tag IDs are unique within a struct
+#[allow(dead_code)]
+pub fn validate_field_metas(fields_with_meta: &[(&Field, ForyFieldMeta)]) ->
syn::Result<()> {
+ let mut id_to_field: HashMap<i32, &syn::Ident> = HashMap::new();
+
+ for (field, meta) in fields_with_meta {
+ if meta.skip {
+ continue;
+ }
+
+ if let Some(id) = meta.id {
+ if id >= 0 {
+ if let Some(existing) = id_to_field.get(&id) {
+ let field_name = field.ident.as_ref().unwrap();
+ return Err(syn::Error::new(
+ field_name.span(),
+ format!(
+ "duplicate fory field id={} on fields '{}' and
'{}'",
+ id, existing, field_name
+ ),
+ ));
+ }
+ id_to_field.insert(id, field.ident.as_ref().unwrap());
+ }
+ }
+ }
+
+ Ok(())
+}
+
+/// Extract the outer type name from a type (e.g., "Option" from
`Option<String>`)
+fn extract_outer_type_name(ty: &Type) -> String {
+ match ty {
+ Type::Path(type_path) => {
+ if let Some(seg) = type_path.path.segments.last() {
+ seg.ident.to_string()
+ } else {
+ String::new()
+ }
+ }
+ _ => String::new(),
+ }
+}
+
+/// Extract the inner type from `Option<T>`
+fn extract_option_inner_type(ty: &Type) -> Option<Type> {
+ if let Type::Path(type_path) = ty {
+ if let Some(seg) = type_path.path.segments.last() {
+ if seg.ident == "Option" {
+ if let PathArguments::AngleBracketed(args) = &seg.arguments {
+ if let Some(GenericArgument::Type(inner_ty)) =
args.args.first() {
+ return Some(inner_ty.clone());
+ }
+ }
+ }
+ }
+ }
+ None
+}
+
+/// Classify a field type to determine default nullable/ref behavior
+pub fn classify_field_type(ty: &Type) -> FieldTypeClass {
+ let type_name = extract_outer_type_name(ty);
+ match type_name.as_str() {
+ // Primitives
+ "i8" | "i16" | "i32" | "i64" | "i128" | "isize" | "u8" | "u16" | "u32"
| "u64" | "u128"
+ | "usize" | "f32" | "f64" | "bool" => FieldTypeClass::Primitive,
+
+ // Option<T>
+ "Option" => {
+ // Check if inner type is Rc/Arc/RcWeak/ArcWeak for combined
behavior
+ if let Some(inner) = extract_option_inner_type(ty) {
+ let inner_class = classify_field_type(&inner);
+ if matches!(
+ inner_class,
+ FieldTypeClass::Rc
+ | FieldTypeClass::Arc
+ | FieldTypeClass::RcWeak
+ | FieldTypeClass::ArcWeak
+ ) {
+ return inner_class; // Option<Rc<T>> inherits Rc's ref
tracking
+ }
+ }
+ FieldTypeClass::Option
+ }
+
+ // Shared ownership types (std library)
+ "Rc" => FieldTypeClass::Rc,
+ "Arc" => FieldTypeClass::Arc,
+
+ // Fory's weak reference types (nullable AND ref tracking by default)
+ "RcWeak" => FieldTypeClass::RcWeak,
+ "ArcWeak" => FieldTypeClass::ArcWeak,
+
+ // All other types
+ _ => FieldTypeClass::Other,
+ }
+}
+
+/// Get nullable and ref tracking flags for a field based on its type and
metadata
+#[allow(dead_code)]
+pub fn get_field_flags(field: &Field, meta: &ForyFieldMeta) -> (bool, bool) {
+ let type_class = classify_field_type(&field.ty);
+ let nullable = meta.effective_nullable(type_class);
+ let ref_tracking = meta.effective_ref_tracking(type_class);
+ (nullable, ref_tracking)
+}
+
+/// Parse field metadata for all fields and validate
+#[allow(dead_code)]
+pub fn parse_and_validate_fields<'a>(
+ fields: &'a [&'a Field],
+) -> syn::Result<Vec<(&'a Field, ForyFieldMeta)>> {
+ let fields_with_meta: Vec<_> = fields
+ .iter()
+ .map(|f| {
+ let meta = parse_field_meta(f)?;
+ Ok((*f, meta))
+ })
+ .collect::<syn::Result<_>>()?;
+
+ validate_field_metas(&fields_with_meta)?;
+
+ Ok(fields_with_meta)
+}
+
+/// Check if a field has the skip attribute
+pub fn is_skip_field(field: &Field) -> bool {
+ parse_field_meta(field).is_ok_and(|meta| meta.skip)
+}
+
+/// Convert type to string for comparison (removes whitespace)
+#[allow(dead_code)]
+pub fn type_to_string(ty: &Type) -> String {
+ ty.to_token_stream()
+ .to_string()
+ .chars()
+ .filter(|c| !c.is_whitespace())
+ .collect()
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use syn::parse_quote;
+
+ #[test]
+ fn test_parse_id_only() {
+ let field: Field = parse_quote! {
+ #[fory(id = 0)]
+ name: String
+ };
+ let meta = parse_field_meta(&field).unwrap();
+ assert_eq!(meta.id, Some(0));
+ assert_eq!(meta.nullable, None);
+ assert_eq!(meta.ref_tracking, None);
+ assert!(!meta.skip);
+ }
+
+ #[test]
+ fn test_parse_full_attributes() {
+ let field: Field = parse_quote! {
+ #[fory(id = 1, nullable = true, ref = false)]
+ data: Vec<u8>
+ };
+ let meta = parse_field_meta(&field).unwrap();
+ assert_eq!(meta.id, Some(1));
+ assert_eq!(meta.nullable, Some(true));
+ assert_eq!(meta.ref_tracking, Some(false));
+ }
+
+ #[test]
+ fn test_parse_standalone_flags() {
+ let field: Field = parse_quote! {
+ #[fory(id = 2, nullable, ref)]
+ data: String
+ };
+ let meta = parse_field_meta(&field).unwrap();
+ assert_eq!(meta.id, Some(2));
+ assert_eq!(meta.nullable, Some(true));
+ assert_eq!(meta.ref_tracking, Some(true));
+ }
+
+ #[test]
+ fn test_parse_skip() {
+ let field: Field = parse_quote! {
+ #[fory(skip)]
+ secret: String
+ };
+ let meta = parse_field_meta(&field).unwrap();
+ assert!(meta.skip);
+ }
+
+ #[test]
+ fn test_validate_duplicate_ids() {
+ let field1: Field = parse_quote! {
+ #[fory(id = 0)]
+ name: String
+ };
+ let field2: Field = parse_quote! {
+ #[fory(id = 0)]
+ other: String
+ };
+ let meta1 = parse_field_meta(&field1).unwrap();
+ let meta2 = parse_field_meta(&field2).unwrap();
+
+ let result = validate_field_metas(&[(&field1, meta1), (&field2,
meta2)]);
+ assert!(result.is_err());
+ }
+
+ #[test]
+ fn test_classify_primitive_types() {
+ let field: Field = parse_quote! { x: i32 };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Primitive);
+
+ let field: Field = parse_quote! { x: f64 };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Primitive);
+
+ let field: Field = parse_quote! { x: bool };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Primitive);
+ }
+
+ #[test]
+ fn test_classify_option_types() {
+ let field: Field = parse_quote! { x: Option<String> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Option);
+
+ let field: Field = parse_quote! { x: Option<i32> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Option);
+ }
+
+ #[test]
+ fn test_classify_shared_ownership_types() {
+ let field: Field = parse_quote! { x: Rc<String> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Rc);
+
+ let field: Field = parse_quote! { x: Arc<Vec<u8>> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Arc);
+
+ let field: Field = parse_quote! { x: RcWeak<String> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::RcWeak);
+
+ let field: Field = parse_quote! { x: ArcWeak<i32> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::ArcWeak);
+ }
+
+ #[test]
+ fn test_classify_option_with_shared_types() {
+ // Option<Rc<T>> should inherit Rc's ref tracking
+ let field: Field = parse_quote! { x: Option<Rc<String>> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Rc);
+
+ let field: Field = parse_quote! { x: Option<Arc<i32>> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Arc);
+ }
+
+ #[test]
+ fn test_classify_other_types() {
+ let field: Field = parse_quote! { x: String };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Other);
+
+ let field: Field = parse_quote! { x: Vec<u8> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Other);
+
+ let field: Field = parse_quote! { x: HashMap<String, i32> };
+ assert_eq!(classify_field_type(&field.ty), FieldTypeClass::Other);
+ }
+
+ #[test]
+ fn test_effective_nullable_defaults() {
+ let meta = ForyFieldMeta::default();
+
+ // Option and RcWeak/ArcWeak are nullable by default
+ assert!(meta.effective_nullable(FieldTypeClass::Option));
+ assert!(meta.effective_nullable(FieldTypeClass::RcWeak));
+ assert!(meta.effective_nullable(FieldTypeClass::ArcWeak));
+
+ // All others are non-nullable by default
+ assert!(!meta.effective_nullable(FieldTypeClass::Primitive));
+ assert!(!meta.effective_nullable(FieldTypeClass::Rc));
+ assert!(!meta.effective_nullable(FieldTypeClass::Arc));
+ assert!(!meta.effective_nullable(FieldTypeClass::Other));
+ }
+
+ #[test]
+ fn test_effective_ref_tracking_defaults() {
+ let meta = ForyFieldMeta::default();
+
+ // Rc, Arc, and RcWeak/ArcWeak have ref tracking by default
+ assert!(meta.effective_ref_tracking(FieldTypeClass::Rc));
+ assert!(meta.effective_ref_tracking(FieldTypeClass::Arc));
+ assert!(meta.effective_ref_tracking(FieldTypeClass::RcWeak));
+ assert!(meta.effective_ref_tracking(FieldTypeClass::ArcWeak));
+
+ // All others don't have ref tracking by default
+ assert!(!meta.effective_ref_tracking(FieldTypeClass::Primitive));
+ assert!(!meta.effective_ref_tracking(FieldTypeClass::Option));
+ assert!(!meta.effective_ref_tracking(FieldTypeClass::Other));
+ }
+
+ #[test]
+ fn test_explicit_attribute_overrides_default() {
+ // Explicit nullable=true overrides default
+ let meta = ForyFieldMeta {
+ id: Some(0),
+ nullable: Some(true),
+ ref_tracking: None,
+ skip: false,
+ };
+ assert!(meta.effective_nullable(FieldTypeClass::Primitive)); // Would
be false by default
+
+ // Explicit ref=false overrides default
+ let meta = ForyFieldMeta {
+ id: Some(0),
+ nullable: None,
+ ref_tracking: Some(false),
+ skip: false,
+ };
+ assert!(!meta.effective_ref_tracking(FieldTypeClass::Rc)); // Would be
true by default
+ }
+}
diff --git a/rust/fory-derive/src/object/misc.rs
b/rust/fory-derive/src/object/misc.rs
index c0e5a18ba..ae815d009 100644
--- a/rust/fory-derive/src/object/misc.rs
+++ b/rust/fory-derive/src/object/misc.rs
@@ -20,6 +20,7 @@ use quote::quote;
use std::sync::atomic::{AtomicU32, Ordering};
use syn::Field;
+use super::field_meta::{classify_field_type, parse_field_meta};
use super::util::{
classify_trait_object_field, generic_tree_to_tokens,
get_filtered_fields_iter,
get_sort_fields_ts, parse_generic_tree, StructField,
@@ -77,22 +78,47 @@ pub fn gen_field_fields_info(fields: &[&Field]) ->
TokenStream {
.map(|(idx, field)| {
let ty = &field.ty;
let name = super::util::get_field_name(field, idx);
+
+ // Parse field metadata for nullable/ref tracking and field ID
+ let meta = parse_field_meta(field).unwrap_or_default();
+ let type_class = classify_field_type(ty);
+ let nullable = meta.effective_nullable(type_class);
+ let ref_tracking = meta.effective_ref_tracking(type_class);
+ // Only use explicit field ID when user sets #[fory(id = N)]
+ // Otherwise use -1 to indicate field name encoding should be used
+ let field_id = if meta.uses_tag_id() {
+ meta.effective_id() as i16
+ } else {
+ -1i16 // Use field name encoding when no explicit ID
+ };
+
match classify_trait_object_field(ty) {
StructField::None => {
let generic_tree = parse_generic_tree(ty);
let generic_token = generic_tree_to_tokens(&generic_tree);
quote! {
- fory_core::meta::FieldInfo::new(#name, #generic_token)
+ fory_core::meta::FieldInfo::new_with_id(
+ #field_id,
+ #name,
+ {
+ let mut ft = #generic_token;
+ ft.nullable = #nullable;
+ ft.ref_tracking = #ref_tracking;
+ ft
+ }
+ )
}
}
StructField::VecBox(_) | StructField::VecRc(_) |
StructField::VecArc(_) => {
quote! {
- fory_core::meta::FieldInfo::new(#name,
fory_core::meta::FieldType {
+ fory_core::meta::FieldInfo::new_with_id(#field_id,
#name, fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::LIST as u32,
- nullable: false,
+ nullable: #nullable,
+ ref_tracking: #ref_tracking,
generics: vec![fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::UNKNOWN as
u32,
nullable: false,
+ ref_tracking: false,
generics: Vec::new()
}]
})
@@ -104,14 +130,16 @@ pub fn gen_field_fields_info(fields: &[&Field]) ->
TokenStream {
let key_generic_tree = parse_generic_tree(key_ty.as_ref());
let key_generic_token =
generic_tree_to_tokens(&key_generic_tree);
quote! {
- fory_core::meta::FieldInfo::new(#name,
fory_core::meta::FieldType {
+ fory_core::meta::FieldInfo::new_with_id(#field_id,
#name, fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::MAP as u32,
- nullable: false,
+ nullable: #nullable,
+ ref_tracking: #ref_tracking,
generics: vec![
#key_generic_token,
fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::UNKNOWN
as u32,
nullable: false,
+ ref_tracking: false,
generics: Vec::new()
}
]
@@ -120,9 +148,10 @@ pub fn gen_field_fields_info(fields: &[&Field]) ->
TokenStream {
}
_ => {
quote! {
- fory_core::meta::FieldInfo::new(#name,
fory_core::meta::FieldType {
+ fory_core::meta::FieldInfo::new_with_id(#field_id,
#name, fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::UNKNOWN as u32,
- nullable: false,
+ nullable: #nullable,
+ ref_tracking: #ref_tracking,
generics: Vec::new()
})
}
diff --git a/rust/fory-derive/src/object/mod.rs
b/rust/fory-derive/src/object/mod.rs
index a2529d1fe..d546adb45 100644
--- a/rust/fory-derive/src/object/mod.rs
+++ b/rust/fory-derive/src/object/mod.rs
@@ -16,6 +16,7 @@
// under the License.
mod derive_enum;
+pub(crate) mod field_meta;
mod misc;
pub(crate) mod read;
mod serializer;
diff --git a/rust/fory-derive/src/object/read.rs
b/rust/fory-derive/src/object/read.rs
index 349db4167..260531cba 100644
--- a/rust/fory-derive/src/object/read.rs
+++ b/rust/fory-derive/src/object/read.rs
@@ -610,6 +610,9 @@ pub(crate) fn gen_read_compatible_with_construction(
.map(|(i, field)| {
let var_name = create_private_field_name(field, i);
let field_name = super::util::get_field_name(field, i);
+ // Use sorted index for matching. The assign_field_ids function
assigns
+ // the sorted index to matched fields after lookup (by ID or name).
+ // Fields that don't match or have type mismatches get field_id =
-1.
let field_id = i as i16;
let body = gen_read_compatible_match_arm_body(field, &var_name,
&field_name);
quote! {
diff --git a/rust/fory-derive/src/object/util.rs
b/rust/fory-derive/src/object/util.rs
index fbd9e8c60..9f77f25ff 100644
--- a/rust/fory-derive/src/object/util.rs
+++ b/rust/fory-derive/src/object/util.rs
@@ -507,6 +507,7 @@ pub(super) fn generic_tree_to_tokens(node: &TypeNode) ->
TokenStream {
vec![fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::UNKNOWN as u32,
nullable: true,
+ ref_tracking: false,
generics: vec![],
}]
)
@@ -575,6 +576,7 @@ pub(super) fn generic_tree_to_tokens(node: &TypeNode) ->
TokenStream {
vec![fory_core::meta::FieldType {
type_id: fory_core::types::TypeId::UNKNOWN as u32,
nullable: true,
+ ref_tracking: false,
generics: vec![],
}]
)
@@ -1099,29 +1101,41 @@ fn to_snake_case(name: &str) -> String {
///
/// **Fingerprint Format:**
///
-/// Each field contributes: `<field_name>,<type_id>,<ref>,<nullable>;`
+/// Each field contributes: `<field_name_or_id>,<type_id>,<ref>,<nullable>;`
///
/// Fields are sorted by field name (snake_case) lexicographically.
///
/// **Field Components:**
-/// - `field_name`: snake_case field name (Rust doesn't support field tag IDs
yet)
+/// - `field_name_or_id`: snake_case field name, or tag ID if `#[fory(id =
N)]` is set
/// - `type_id`: Fory TypeId as decimal string (e.g., "4" for INT32)
-/// - `ref`: "1" if reference tracking enabled, "0" otherwise (currently
always "0" in Rust)
+/// - `ref`: "1" if reference tracking enabled, "0" otherwise
/// - `nullable`: "1" if null flag is written, "0" otherwise
///
/// **Example fingerprint:** `"age,4,0,0;name,12,0,1;"`
///
/// This format is consistent across Go, Java, Rust, and C++ implementations.
pub(crate) fn compute_struct_fingerprint(fields: &[&Field]) -> String {
- let mut field_info_map: HashMap<String, (u32, bool)> =
HashMap::with_capacity(fields.len());
+ use super::field_meta::{classify_field_type, parse_field_meta};
+
+ // (name, type_id, ref_tracking, nullable, field_id)
+ let mut field_info_map: HashMap<String, (u32, bool, bool, i32)> =
+ HashMap::with_capacity(fields.len());
for (idx, field) in fields.iter().enumerate() {
let name = get_field_name(field, idx);
let type_id = get_type_id_by_type_ast(&field.ty);
- // Match Java's behavior: primitives are non-nullable, everything else
is nullable
- // In Java: char nullable = rawType.isPrimitive() ? '0' : '1';
- let type_name = extract_type_name(&field.ty);
- let nullable = !is_primitive_type(&type_name);
- field_info_map.insert(name, (type_id, nullable));
+
+ // Parse field metadata for nullable/ref tracking
+ let meta = parse_field_meta(field).unwrap_or_default();
+ if meta.skip {
+ continue;
+ }
+
+ let type_class = classify_field_type(&field.ty);
+ let nullable = meta.effective_nullable(type_class);
+ let ref_tracking = meta.effective_ref_tracking(type_class);
+ let field_id = meta.effective_id();
+
+ field_info_map.insert(name, (type_id, ref_tracking, nullable,
field_id));
}
// Sort field names lexicographically for fingerprint computation
@@ -1132,13 +1146,19 @@ pub(crate) fn compute_struct_fingerprint(fields:
&[&Field]) -> String {
let mut fingerprint = String::new();
for name in sorted_names.iter() {
- let (type_id, nullable) = field_info_map
+ let (type_id, ref_tracking, nullable, field_id) = field_info_map
.get(name)
.expect("Field metadata missing during struct hash computation");
- // Format: <field_name>,<type_id>,<ref>,<nullable>;
- // Since Rust doesn't support field tag IDs yet, use snake_case field
name
- fingerprint.push_str(&to_snake_case(name));
+
+ // Format: <field_name_or_id>,<type_id>,<ref>,<nullable>;
+ // If field has a tag ID >= 0, use that; otherwise use snake_case
field name
+ if *field_id >= 0 {
+ fingerprint.push_str(&field_id.to_string());
+ } else {
+ fingerprint.push_str(&to_snake_case(name));
+ }
fingerprint.push(',');
+
let effective_type_id = if *type_id == TypeId::UNKNOWN as u32 {
TypeId::UNKNOWN as u32
} else {
@@ -1146,8 +1166,7 @@ pub(crate) fn compute_struct_fingerprint(fields:
&[&Field]) -> String {
};
fingerprint.push_str(&effective_type_id.to_string());
fingerprint.push(',');
- // ref flag: currently always 0 in Rust (no ref tracking support yet)
- fingerprint.push('0');
+ fingerprint.push_str(if *ref_tracking { "1" } else { "0" });
fingerprint.push(',');
fingerprint.push_str(if *nullable { "1;" } else { "0;" });
}
@@ -1221,18 +1240,7 @@ pub(crate) fn should_skip_type_info_for_field(ty: &Type)
-> bool {
}
pub(crate) fn is_skip_field(field: &syn::Field) -> bool {
- field.attrs.iter().any(|attr| {
- attr.path().is_ident("fory") && {
- let mut skip = false;
- let _ = attr.parse_nested_meta(|meta| {
- if meta.path.is_ident("skip") {
- skip = true;
- }
- Ok(())
- });
- skip
- }
- })
+ super::field_meta::is_skip_field(field)
}
pub(crate) fn is_skip_enum_variant(variant: &syn::Variant) -> bool {
diff --git a/rust/tests/tests/test_field_meta.rs
b/rust/tests/tests/test_field_meta.rs
new file mode 100644
index 000000000..034640459
--- /dev/null
+++ b/rust/tests/tests/test_field_meta.rs
@@ -0,0 +1,638 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//! Tests for field-level `#[fory(...)]` attributes
+
+use fory_core::Fory;
+use fory_derive::ForyObject;
+use std::rc::Rc;
+use std::sync::Arc;
+
+/// Test struct with skip attribute
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithSkip {
+ name: String,
+ #[fory(skip)]
+ secret: String,
+ age: i32,
+}
+
+#[test]
+fn test_skip_field() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithSkip>(1).unwrap();
+
+ let original = StructWithSkip {
+ name: "Alice".to_string(),
+ secret: "password123".to_string(),
+ age: 30,
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithSkip = fory.deserialize(&bytes).unwrap();
+
+ assert_eq!(deserialized.name, "Alice");
+ assert_eq!(deserialized.secret, String::default()); // Should be default
+ assert_eq!(deserialized.age, 30);
+}
+
+/// Test struct with nullable attribute on Option fields
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithNullable {
+ name: String,
+ #[fory(nullable)]
+ description: Option<String>,
+ count: i32,
+}
+
+#[test]
+fn test_nullable_attribute() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithNullable>(2).unwrap();
+
+ // Test with Some value
+ let original = StructWithNullable {
+ name: "Test".to_string(),
+ description: Some("A description".to_string()),
+ count: 42,
+ };
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithNullable = fory.deserialize(&bytes).unwrap();
+ assert_eq!(original, deserialized);
+
+ // Test with None value
+ let original_none = StructWithNullable {
+ name: "Test".to_string(),
+ description: None,
+ count: 42,
+ };
+ let bytes = fory.serialize(&original_none).unwrap();
+ let deserialized: StructWithNullable = fory.deserialize(&bytes).unwrap();
+ assert_eq!(original_none, deserialized);
+}
+
+/// Test struct with explicit ref tracking disabled
+#[derive(ForyObject, Debug, PartialEq, Clone)]
+struct InnerData {
+ value: i32,
+}
+
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithRefTracking {
+ #[fory(ref = false)]
+ data: Rc<InnerData>,
+}
+
+#[test]
+fn test_ref_tracking_disabled() {
+ let mut fory = Fory::default();
+ fory.register::<InnerData>(3).unwrap();
+ fory.register::<StructWithRefTracking>(4).unwrap();
+
+ let inner = Rc::new(InnerData { value: 100 });
+ let original = StructWithRefTracking { data: inner };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithRefTracking =
fory.deserialize(&bytes).unwrap();
+ assert_eq!(deserialized.data.value, 100);
+}
+
+/// Test struct with explicit nullable = false
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithExplicitNotNull {
+ #[fory(nullable = false)]
+ required_option: Option<String>,
+}
+
+#[test]
+fn test_explicit_not_nullable() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithExplicitNotNull>(5).unwrap();
+
+ let original = StructWithExplicitNotNull {
+ required_option: Some("value".to_string()),
+ };
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithExplicitNotNull =
fory.deserialize(&bytes).unwrap();
+ assert_eq!(original, deserialized);
+}
+
+/// Test struct with Arc and ref tracking
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithArc {
+ data: Arc<InnerData>,
+}
+
+#[test]
+fn test_arc_default_ref_tracking() {
+ let mut fory = Fory::default();
+ fory.register::<InnerData>(6).unwrap();
+ fory.register::<StructWithArc>(7).unwrap();
+
+ let inner = Arc::new(InnerData { value: 200 });
+ let original = StructWithArc { data: inner };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithArc = fory.deserialize(&bytes).unwrap();
+ assert_eq!(deserialized.data.value, 200);
+}
+
+/// Test struct with multiple attributes combined
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithCombinedAttrs {
+ name: String,
+ #[fory(skip)]
+ internal_state: i32,
+ #[fory(nullable)]
+ optional_data: Option<String>,
+}
+
+#[test]
+fn test_combined_attributes() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithCombinedAttrs>(8).unwrap();
+
+ let original = StructWithCombinedAttrs {
+ name: "Test".to_string(),
+ internal_state: 999,
+ optional_data: Some("data".to_string()),
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithCombinedAttrs =
fory.deserialize(&bytes).unwrap();
+
+ assert_eq!(deserialized.name, "Test");
+ assert_eq!(deserialized.internal_state, 0); // Skipped, default value
+ assert_eq!(deserialized.optional_data, Some("data".to_string()));
+}
+
+/// Test struct with primitive types (should be non-nullable by default)
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithPrimitives {
+ count: i32,
+ value: f64,
+ flag: bool,
+}
+
+#[test]
+fn test_primitive_defaults() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithPrimitives>(9).unwrap();
+
+ let original = StructWithPrimitives {
+ count: 42,
+ value: 1.23456,
+ flag: true,
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithPrimitives = fory.deserialize(&bytes).unwrap();
+ assert_eq!(original, deserialized);
+}
+
+/// Test struct with field IDs for compact encoding
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithFieldIds {
+ #[fory(id = 0)]
+ name: String,
+ #[fory(id = 1)]
+ age: i32,
+ #[fory(id = 2)]
+ email: String,
+}
+
+#[test]
+fn test_field_id_attribute() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithFieldIds>(10).unwrap();
+
+ let original = StructWithFieldIds {
+ name: "Bob".to_string(),
+ age: 25,
+ email: "[email protected]".to_string(),
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithFieldIds = fory.deserialize(&bytes).unwrap();
+ assert_eq!(original, deserialized);
+}
+
+/// Test struct with mixed field IDs and non-ID fields
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithMixedIds {
+ #[fory(id = 0)]
+ id_field: i32,
+ regular_field: String,
+ #[fory(id = 2)]
+ another_id_field: f64,
+}
+
+#[test]
+fn test_mixed_field_ids() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithMixedIds>(11).unwrap();
+
+ let original = StructWithMixedIds {
+ id_field: 100,
+ regular_field: "test".to_string(),
+ another_id_field: 99.99,
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithMixedIds = fory.deserialize(&bytes).unwrap();
+ assert_eq!(original, deserialized);
+}
+
+/// Test field ID with skip and nullable combined
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithCombinedFieldAttrs {
+ #[fory(id = 0)]
+ name: String,
+ #[fory(id = 1, nullable)]
+ description: Option<String>,
+ #[fory(skip)]
+ internal_id: i64,
+ #[fory(id = 2)]
+ count: i32,
+}
+
+#[test]
+fn test_field_id_with_other_attrs() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithCombinedFieldAttrs>(12).unwrap();
+
+ let original = StructWithCombinedFieldAttrs {
+ name: "Test".to_string(),
+ description: Some("A description".to_string()),
+ internal_id: 999999,
+ count: 42,
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithCombinedFieldAttrs =
fory.deserialize(&bytes).unwrap();
+
+ assert_eq!(deserialized.name, "Test");
+ assert_eq!(deserialized.description, Some("A description".to_string()));
+ assert_eq!(deserialized.internal_id, 0); // Skipped, should be default
+ assert_eq!(deserialized.count, 42);
+}
+
+// ============================================================================
+// Compatible Mode Tests with Struct Versioning
+// ============================================================================
+
+mod compatible_v1 {
+ use fory_derive::ForyObject;
+
+ /// Version 1 of a user struct - original version
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct UserV1 {
+ #[fory(id = 0)]
+ pub name: String,
+ #[fory(id = 1)]
+ pub age: i32,
+ }
+}
+
+mod compatible_v2 {
+ use fory_derive::ForyObject;
+
+ /// Version 2 of a user struct - added email field
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct UserV2 {
+ #[fory(id = 0)]
+ pub name: String,
+ #[fory(id = 1)]
+ pub age: i32,
+ #[fory(id = 2, nullable)]
+ pub email: Option<String>,
+ }
+}
+
+#[test]
+fn test_compatible_mode_v1_to_v2() {
+ // Serialize with V1, deserialize with V2 (forward compatibility)
+ let mut fory_v1 = Fory::default().compatible(true);
+ fory_v1.register::<compatible_v1::UserV1>(100).unwrap();
+
+ let mut fory_v2 = Fory::default().compatible(true);
+ fory_v2.register::<compatible_v2::UserV2>(100).unwrap();
+
+ let user_v1 = compatible_v1::UserV1 {
+ name: "Alice".to_string(),
+ age: 30,
+ };
+
+ // Serialize with V1
+ let bytes = fory_v1.serialize(&user_v1).unwrap();
+
+ // Deserialize with V2 - new field should get default value
+ let user_v2: compatible_v2::UserV2 = fory_v2.deserialize(&bytes).unwrap();
+
+ assert_eq!(user_v2.name, "Alice");
+ assert_eq!(user_v2.age, 30);
+ assert_eq!(user_v2.email, None); // New field should be None
+}
+
+#[test]
+fn test_compatible_mode_v2_to_v1() {
+ // Serialize with V2, deserialize with V1 (backward compatibility)
+ let mut fory_v1 = Fory::default().compatible(true);
+ fory_v1.register::<compatible_v1::UserV1>(100).unwrap();
+
+ let mut fory_v2 = Fory::default().compatible(true);
+ fory_v2.register::<compatible_v2::UserV2>(100).unwrap();
+
+ let user_v2 = compatible_v2::UserV2 {
+ name: "Bob".to_string(),
+ age: 25,
+ email: Some("[email protected]".to_string()),
+ };
+
+ // Serialize with V2
+ let bytes = fory_v2.serialize(&user_v2).unwrap();
+
+ // Deserialize with V1 - extra field should be skipped
+ let user_v1: compatible_v1::UserV1 = fory_v1.deserialize(&bytes).unwrap();
+
+ assert_eq!(user_v1.name, "Bob");
+ assert_eq!(user_v1.age, 25);
+ // email field is ignored since V1 doesn't have it
+}
+
+mod compatible_reorder_v1 {
+ use fory_derive::ForyObject;
+
+ /// Version with specific field order
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct DataV1 {
+ #[fory(id = 0)]
+ pub field_a: String,
+ #[fory(id = 1)]
+ pub field_b: i32,
+ #[fory(id = 2)]
+ pub field_c: f64,
+ }
+}
+
+mod compatible_reorder_v2 {
+ use fory_derive::ForyObject;
+
+ /// Version with reordered fields (same IDs, different order in struct)
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct DataV2 {
+ #[fory(id = 2)]
+ pub field_c: f64,
+ #[fory(id = 0)]
+ pub field_a: String,
+ #[fory(id = 1)]
+ pub field_b: i32,
+ }
+}
+
+#[test]
+fn test_compatible_mode_field_reorder() {
+ // Test that field IDs allow fields to be reordered between versions
+ let mut fory_v1 = Fory::default().compatible(true);
+ fory_v1
+ .register::<compatible_reorder_v1::DataV1>(200)
+ .unwrap();
+
+ let mut fory_v2 = Fory::default().compatible(true);
+ fory_v2
+ .register::<compatible_reorder_v2::DataV2>(200)
+ .unwrap();
+
+ let data_v1 = compatible_reorder_v1::DataV1 {
+ field_a: "hello".to_string(),
+ field_b: 42,
+ field_c: 3.5,
+ };
+
+ // Serialize with V1
+ let bytes = fory_v1.serialize(&data_v1).unwrap();
+
+ // Deserialize with V2 - fields should match by ID regardless of order
+ let data_v2: compatible_reorder_v2::DataV2 =
fory_v2.deserialize(&bytes).unwrap();
+
+ assert_eq!(data_v2.field_a, "hello");
+ assert_eq!(data_v2.field_b, 42);
+ assert_eq!(data_v2.field_c, 3.5);
+}
+
+mod compatible_remove_field_v1 {
+ use fory_derive::ForyObject;
+
+ /// Version with 3 fields
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct ConfigV1 {
+ #[fory(id = 0)]
+ pub name: String,
+ #[fory(id = 1)]
+ pub value: i32,
+ #[fory(id = 2)]
+ pub extra_field: String,
+ }
+}
+
+mod compatible_remove_field_v2 {
+ use fory_derive::ForyObject;
+
+ /// Version with extra_field removed (simulates field removal)
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct ConfigV2 {
+ #[fory(id = 0)]
+ pub name: String,
+ #[fory(id = 1)]
+ pub value: i32,
+ // extra_field removed in this version
+ }
+}
+
+#[test]
+fn test_compatible_mode_field_removed() {
+ // Test that removed fields are handled in compatible mode
+ let mut fory_v1 = Fory::default().compatible(true);
+ fory_v1
+ .register::<compatible_remove_field_v1::ConfigV1>(300)
+ .unwrap();
+
+ let mut fory_v2 = Fory::default().compatible(true);
+ fory_v2
+ .register::<compatible_remove_field_v2::ConfigV2>(300)
+ .unwrap();
+
+ let config_v1 = compatible_remove_field_v1::ConfigV1 {
+ name: "config".to_string(),
+ value: 100,
+ extra_field: "extra_value".to_string(),
+ };
+
+ // Serialize with V1 (3 fields)
+ let bytes = fory_v1.serialize(&config_v1).unwrap();
+
+ // Deserialize with V2 (2 fields) - extra_field should be skipped
+ let config_v2: compatible_remove_field_v2::ConfigV2 =
fory_v2.deserialize(&bytes).unwrap();
+
+ assert_eq!(config_v2.name, "config");
+ assert_eq!(config_v2.value, 100);
+}
+
+/// Test skip attribute in non-compatible mode (simpler case)
+#[derive(ForyObject, Debug, PartialEq)]
+struct StructWithSkipAndId {
+ #[fory(id = 0)]
+ name: String,
+ #[fory(id = 1, skip)]
+ internal: i64,
+ #[fory(id = 2)]
+ count: i32,
+}
+
+#[test]
+fn test_skip_with_field_id() {
+ let mut fory = Fory::default();
+ fory.register::<StructWithSkipAndId>(350).unwrap();
+
+ let original = StructWithSkipAndId {
+ name: "test".to_string(),
+ internal: 999999,
+ count: 42,
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: StructWithSkipAndId = fory.deserialize(&bytes).unwrap();
+
+ assert_eq!(deserialized.name, "test");
+ assert_eq!(deserialized.internal, 0); // Skipped, default value
+ assert_eq!(deserialized.count, 42);
+}
+
+#[test]
+fn test_compatible_mode_roundtrip() {
+ // Test full roundtrip with compatible mode and field IDs
+ let mut fory = Fory::default().compatible(true);
+ fory.register::<compatible_v2::UserV2>(400).unwrap();
+
+ let original = compatible_v2::UserV2 {
+ name: "Charlie".to_string(),
+ age: 35,
+ email: Some("[email protected]".to_string()),
+ };
+
+ let bytes = fory.serialize(&original).unwrap();
+ let deserialized: compatible_v2::UserV2 =
fory.deserialize(&bytes).unwrap();
+
+ assert_eq!(original, deserialized);
+}
+
+// ============================================================================
+// Payload Size Tests - Field IDs vs Field Names
+// ============================================================================
+
+mod payload_with_field_ids {
+ use fory_derive::ForyObject;
+
+ /// Struct using field IDs for compact encoding
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct CompactUser {
+ #[fory(id = 0)]
+ pub username: String,
+ #[fory(id = 1)]
+ pub email_address: String,
+ #[fory(id = 2)]
+ pub phone_number: String,
+ #[fory(id = 3)]
+ pub street_address: String,
+ #[fory(id = 4)]
+ pub postal_code: i32,
+ }
+}
+
+mod payload_without_field_ids {
+ use fory_derive::ForyObject;
+
+ /// Struct using field names (no field IDs)
+ #[derive(ForyObject, Debug, PartialEq, Clone)]
+ pub struct VerboseUser {
+ pub username: String,
+ pub email_address: String,
+ pub phone_number: String,
+ pub street_address: String,
+ pub postal_code: i32,
+ }
+}
+
+#[test]
+fn test_field_id_payload_compatible_mode() {
+ // Test that structs with field IDs produce smaller payloads in compatible
mode.
+ // Field IDs are encoded as compact 1-2 byte integers instead of full
field names,
+ // following the xlang serialization spec (TAG_ID encoding with 2-bit
marker 0b11).
+ let mut fory_compact = Fory::default().compatible(true);
+ fory_compact
+ .register::<payload_with_field_ids::CompactUser>(500)
+ .unwrap();
+
+ let mut fory_verbose = Fory::default().compatible(true);
+ fory_verbose
+ .register::<payload_without_field_ids::VerboseUser>(501)
+ .unwrap();
+
+ let compact_user = payload_with_field_ids::CompactUser {
+ username: "john_doe".to_string(),
+ email_address: "[email protected]".to_string(),
+ phone_number: "+1-555-123-4567".to_string(),
+ street_address: "123 Main Street".to_string(),
+ postal_code: 12345,
+ };
+
+ let verbose_user = payload_without_field_ids::VerboseUser {
+ username: "john_doe".to_string(),
+ email_address: "[email protected]".to_string(),
+ phone_number: "+1-555-123-4567".to_string(),
+ street_address: "123 Main Street".to_string(),
+ postal_code: 12345,
+ };
+
+ let compact_bytes = fory_compact.serialize(&compact_user).unwrap();
+ let verbose_bytes = fory_verbose.serialize(&verbose_user).unwrap();
+
+ // Log payload sizes for reference
+ println!(
+ "Payload sizes - with field IDs: {} bytes, with field names: {} bytes",
+ compact_bytes.len(),
+ verbose_bytes.len()
+ );
+
+ // Verify data integrity - both should deserialize correctly
+ let deserialized_compact: payload_with_field_ids::CompactUser =
+ fory_compact.deserialize(&compact_bytes).unwrap();
+ let deserialized_verbose: payload_without_field_ids::VerboseUser =
+ fory_verbose.deserialize(&verbose_bytes).unwrap();
+
+ assert_eq!(compact_user, deserialized_compact);
+ assert_eq!(verbose_user, deserialized_verbose);
+
+ // Verify that field ID encoding produces smaller payloads
+ // Field IDs (1-2 bytes each) are much smaller than field names (variable
length strings)
+ assert!(
+ compact_bytes.len() < verbose_bytes.len(),
+ "Compact encoding with field IDs ({} bytes) should be smaller than
field names ({} bytes)",
+ compact_bytes.len(),
+ verbose_bytes.len()
+ );
+}
diff --git a/rust/tests/tests/test_meta.rs b/rust/tests/tests/test_meta.rs
index dd5e85255..ec8f586da 100644
--- a/rust/tests/tests/test_meta.rs
+++ b/rust/tests/tests/test_meta.rs
@@ -30,6 +30,7 @@ fn test_meta_hash() {
field_type: FieldType {
type_id: 44,
nullable: true,
+ ref_tracking: false,
generics: vec![],
},
}],
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