From 00e2367e01cf6c8f40a74ec31295ba969abbd6da Mon Sep 17 00:00:00 2001
From: "Kevin R. Thornton" <krthornt@uci.edu>
Date: Fri, 6 Sep 2024 16:30:24 -0700
Subject: [PATCH] refactor: update to proc_macro_error2 (#661)

---
 Cargo.lock              | 26 +++++++++-----------------
 tskit-derive/Cargo.toml |  2 +-
 tskit-derive/src/lib.rs | 10 +++++-----
 3 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 12634129b..97b627638 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -420,27 +420,25 @@ dependencies = [
 ]
 
 [[package]]
-name = "proc-macro-error"
-version = "1.0.4"
+name = "proc-macro-error-attr2"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+checksum = "96de42df36bb9bba5542fe9f1a054b8cc87e172759a1868aa05c1f3acc89dfc5"
 dependencies = [
- "proc-macro-error-attr",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
- "version_check",
 ]
 
 [[package]]
-name = "proc-macro-error-attr"
-version = "1.0.4"
+name = "proc-macro-error2"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+checksum = "74cdd32837fa2e86ec09c8266e5aad92400ac934c6dbca83d54673b298db3e45"
 dependencies = [
+ "proc-macro-error-attr2",
  "proc-macro2",
  "quote",
- "version_check",
+ "syn 2.0.57",
 ]
 
 [[package]]
@@ -687,7 +685,7 @@ dependencies = [
 name = "tskit-derive"
 version = "0.2.0"
 dependencies = [
- "proc-macro-error",
+ "proc-macro-error2",
  "quote",
  "syn 1.0.109",
 ]
@@ -704,12 +702,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
-[[package]]
-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
diff --git a/tskit-derive/Cargo.toml b/tskit-derive/Cargo.toml
index 9b7e80cd3..324ba19be 100644
--- a/tskit-derive/Cargo.toml
+++ b/tskit-derive/Cargo.toml
@@ -14,4 +14,4 @@ proc-macro = true
 [dependencies]
 syn = { version = "1.0", features = ["derive"] }
 quote = "1.0"
-proc-macro-error = "1.0.4"
+proc-macro-error2 = "2.0"
diff --git a/tskit-derive/src/lib.rs b/tskit-derive/src/lib.rs
index 63730f939..1c4e2bdb6 100644
--- a/tskit-derive/src/lib.rs
+++ b/tskit-derive/src/lib.rs
@@ -64,25 +64,25 @@ fn impl_metadata_roundtrip_macro(ast: &syn::DeriveInput) -> Result<TokenStream,
             } else if &serializer == "bincode" {
                 return Ok(impl_serde_bincode_roundtrip(name));
             } else {
-                proc_macro_error::abort!(serializer, "is not a supported protocol.");
+                proc_macro_error2::abort!(serializer, "is not a supported protocol.");
             }
         } else {
-            proc_macro_error::abort!(attr.path, "is not a supported attribute.");
+            proc_macro_error2::abort!(attr.path, "is not a supported attribute.");
         }
     }
 
-    proc_macro_error::abort_call_site!("missing [serializer(...)] attribute")
+    proc_macro_error2::abort_call_site!("missing [serializer(...)] attribute")
 }
 
 macro_rules! make_derive_metadata_tag {
     ($function: ident, $metadatatag: ident) => {
-        #[proc_macro_error::proc_macro_error]
+        #[proc_macro_error2::proc_macro_error]
         #[proc_macro_derive($metadatatag, attributes(serializer))]
         /// Register a type as metadata.
         pub fn $function(input: TokenStream) -> TokenStream {
             let ast: syn::DeriveInput = match syn::parse(input) {
                 Ok(ast) => ast,
-                Err(err) => proc_macro_error::abort!(err),
+                Err(err) => proc_macro_error2::abort_call_site!(err),
             };
             let mut roundtrip = impl_metadata_roundtrip_macro(&ast).unwrap();
             let name = &ast.ident;