Switch proc-macro-error to proc-macro-error2 (#493)

Author: evie-calico

mlua_derive/Cargo.toml

@@ -12,12 +12,12 @@ license = "MIT"
 proc-macro = true
 
 [features]
-macros = ["proc-macro-error", "itertools", "regex", "once_cell"]
+macros = ["proc-macro-error2", "itertools", "regex", "once_cell"]
 
 [dependencies]
 quote = "1.0"
 proc-macro2 = { version = "1.0", features = ["span-locations"] }
-proc-macro-error = { version = "1.0", optional = true }
+proc-macro-error2 = { version = "2.0.1", optional = true }
 syn = { version = "2.0", features = ["full"] }
 itertools = { version = "0.13", optional = true }
 regex = { version = "1.4", optional = true }

mlua_derive/src/lib.rs

@@ -7,7 +7,7 @@ use syn::{parse_macro_input, ItemFn, LitStr, Result};
 #[cfg(feature = "macros")]
 use {
     crate::chunk::Chunk, proc_macro::TokenTree, proc_macro2::TokenStream as TokenStream2,
-    proc_macro_error::proc_macro_error,
+    proc_macro_error2::proc_macro_error,
 };
 
 #[derive(Default)]

mlua_derive/src/token.rs

@@ -74,7 +74,7 @@ fn parse_pos(span: &Span) -> Option<(usize, usize)> {
 fn fallback_span_pos(span: &Span) -> (Pos, Pos) {
     let (start, end) = match parse_pos(span) {
         Some(v) => v,
-        None => proc_macro_error::abort_call_site!("Cannot retrieve span information; please use nightly"),
+        None => proc_macro_error2::abort_call_site!("Cannot retrieve span information; please use nightly"),
     };
     (Pos::new(1, start), Pos::new(1, end))
 }