Attribute Macro support

.github/workflows/ci.yml

@@ -23,13 +23,13 @@ jobs:
       with:
         rustflags: ""
     - name: Build
-      run: cargo build --verbose
+      run: cargo build --workspace --all-features --verbose
     - name: Run tests
-      run: cargo test --verbose
+      run: cargo test --workspace --all-features --verbose
     - name: Build doc
-      run: cargo doc --verbose
+      run: cargo doc --workspace --all-features --verbose
     - name: Run clippy
-      run: cargo clippy --verbose
+      run: cargo clippy --workspace --all-features --verbose
     - name: Run rustfmt
       run: cargo fmt --verbose --check
     - name: Build release

.gitignore

@@ -5,7 +5,7 @@
 Cargo.lock
 
 # Ignore target directory.
-/target
+**/target
 
 # Ignore crappy mac files.
 # Ignore files ending in ".nogit".

Cargo.toml

@@ -1,6 +1,17 @@
+[workspace]
+members = [
+    "hashconsing_derive",
+]
+
+resolver = "2"
+
+[workspace.package]
+version = "1.7.0"
+edition = "2021"
+
 [package]
 name = "hashconsing"
-version = "1.7.0"
+version.workspace = true
 authors = [
   "Adrien Champion <adrien.champion@email.com>",
   "Leni Aniva <aniva@stanford.edu>",
@@ -19,7 +30,7 @@ categories = [
 ]
 keywords = ["hashconsing", "hash", "consing", "sharing", "caching"]
 license = "MIT/Apache-2.0"
-edition = "2021"
+edition.workspace = true
 rust-version = "1.60"
 
 [package.metadata.docs.rs]
@@ -29,9 +40,11 @@ features = ["unstable_docrs"]
 with_ahash = ["ahash"]
 unstable_docrs = ["with_ahash"]
 weak-table = ["dep:weak-table"]
+derive = ["hashconsing-derive"]
 
 [dependencies]
 lazy_static = "1.*"
+hashconsing-derive = { version = "1.7.0", optional = true, path = "hashconsing_derive" }
 
 [dependencies.ahash]
 version = "^0.8.3"
@@ -43,6 +56,5 @@ optional = true
 
 [dev-dependencies]
 crossbeam-utils = "^0.8"
-trybuild = "^1.0"
 rayon = "^1.5"
 rand = "0.8"

hashconsing_derive/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "hashconsing-derive"
+version.workspace = true
+edition.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro = true
+
+[dependencies]
+convert_case = "0.11"
+darling = "0.20"
+proc-macro-error = "1.0"
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "2.0", features = ["full"] }
+
+# For doc tests
+[dev-dependencies]
+hashconsing = {path = "..", features = ["derive"]}