proper error handling

betterproto-extras/Cargo.lock

@@ -20,6 +20,7 @@ version = "0.1.0"
 dependencies = [
  "prost-reflect",
  "pyo3",
+ "thiserror",
 ]
 
 [[package]]
@@ -144,7 +145,7 @@ dependencies = [
  "itertools",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -213,7 +214,7 @@ dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -224,7 +225,7 @@ checksum = "947dc12175c254889edc0c02e399476c2f652b4b9ebd123aa655c224de259536"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -268,12 +269,43 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "target-lexicon"
 version = "0.12.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d0e916b1148c8e263850e1ebcbd046f333e0683c724876bb0da63ea4373dc8a"
 
+[[package]]
+name = "thiserror"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97a802ec30afc17eee47b2855fc72e0c4cd62be9b4efe6591edde0ec5bd68d8f"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bb623b56e39ab7dcd4b1b98bb6c8f8d907ed255b18de254088016b27a8ee19b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.29",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.11"