Add common derives to generated contract types (#759)

### What
Add common derives to generated contract types.

### Why
Some of them are required, and all of them are convenient to have on the
data objects/types that are generated by contract imports.

 Close #758

soroban-sdk/src/tests.rs

@@ -11,4 +11,5 @@ mod contract_udt_struct;
 mod contract_udt_struct_tuple;
 mod contractfile_with_sha256;
 mod contractimport;
+mod contractimport_with_error;
 mod contractimport_with_sha256;

soroban-sdk/src/tests/contractimport_with_error.rs

@@ -0,0 +1,31 @@
+use crate as soroban_sdk;
+use soroban_sdk::{contractimpl, symbol, BytesN, Env, Symbol};
+
+mod errcontract {
+    use crate as soroban_sdk;
+    soroban_sdk::contractimport!(
+        file = "../target/wasm32-unknown-unknown/release/test_errors.wasm"
+    );
+}
+
+pub struct Contract;
+
+#[contractimpl]
+impl Contract {
+    pub fn hello_with(env: Env, contract_id: BytesN<32>, flag: u32) -> Symbol {
+        errcontract::Client::new(&env, &contract_id).hello(&flag)
+    }
+}
+
+#[test]
+fn test_functional() {
+    let e = Env::default();
+
+    let err_contract_id = e.register_contract_wasm(None, errcontract::WASM);
+
+    let contract_id = e.register_contract(None, Contract);
+    let client = ContractClient::new(&e, &contract_id);
+
+    let z = client.hello_with(&err_contract_id, &0);
+    assert!(z == symbol!("hello"));
+}

soroban-spec/src/gen/rust.rs

@@ -133,21 +133,25 @@ pub trait Contract {
     fn add(env: soroban_sdk::Env, a: UdtEnum, b: UdtEnum) -> i64;
 }
 #[soroban_sdk::contracttype(export = false)]
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
 pub struct UdtTuple(pub i64, pub soroban_sdk::Vec<i64>);
 #[soroban_sdk::contracttype(export = false)]
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
 pub struct UdtStruct {
     pub a: i64,
     pub b: i64,
     pub c: soroban_sdk::Vec<i64>,
 }
 #[soroban_sdk::contracttype(export = false)]
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
 pub enum UdtEnum {
     UdtA,
     UdtB(UdtStruct),
     UdtC(UdtEnum2),
     UdtD(UdtTuple),
 }
 #[soroban_sdk::contracttype(export = false)]
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
 pub enum UdtEnum2 {
     A = 10,
     B = 15,

soroban-spec/src/gen/rust/types.rs

@@ -31,6 +31,7 @@ pub fn generate_struct(spec: &ScSpecUdtStructV0) -> TokenStream {
         });
         quote! {
             #[soroban_sdk::contracttype(export = false)]
+            #[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
             pub struct #ident ( #(#fields),* );
         }
     } else {
@@ -42,6 +43,7 @@ pub fn generate_struct(spec: &ScSpecUdtStructV0) -> TokenStream {
         });
         quote! {
             #[soroban_sdk::contracttype(export = false)]
+            #[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
             pub struct #ident { #(#fields,)* }
         }
     }
@@ -68,6 +70,7 @@ pub fn generate_union(spec: &ScSpecUdtUnionV0) -> TokenStream {
         });
         quote! {
             #[soroban_sdk::contracttype(export = false)]
+            #[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
             pub enum #ident { #(#variants,)* }
         }
     }
@@ -90,6 +93,7 @@ pub fn generate_enum(spec: &ScSpecUdtEnumV0) -> TokenStream {
         });
         quote! {
             #[soroban_sdk::contracttype(export = false)]
+            #[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd)]
             pub enum #ident { #(#variants,)* }
         }
     }
@@ -112,6 +116,7 @@ pub fn generate_error_enum(spec: &ScSpecUdtErrorEnumV0) -> TokenStream {
         });
         quote! {
             #[soroban_sdk::contracterror(export = false)]
+            #[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd)]
             pub enum #ident { #(#variants,)* }
         }
     }

tests/errors/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "test_result"
+name = "test_errors"
 version = "0.2.0"
 authors = ["Stellar Development Foundation <[email protected]>"]
 license = "Apache-2.0"