fix: various bugs in traits

dev-docs/CHANGELOG.md

@@ -80,6 +80,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Runtime `sha256` now work for arbitrary strings with length >= 128: PR [#1626](https://github.com/tact-lang/tact/pull/1626)
 - Generated code in TypeScript wrappers for contract with `init(init: Init)`: PR [#1709](https://github.com/tact-lang/tact/pull/1709)
 - Error message for comment (text) receivers with 124 bytes or more: PR [#1711](https://github.com/tact-lang/tact/pull/1711)
+- Support overriding constants and methods of BaseTrait: PR [#1591](https://github.com/tact-lang/tact/pull/1591)
+- Forbid traits inherit implicitly from BaseTrait: PR [#1591](https://github.com/tact-lang/tact/pull/1591)
+- Forbid the `override` modifier for constants without the corresponding super-constant: PR [#1591](https://github.com/tact-lang/tact/pull/1591)
 
 ### Docs
 

docs/src/content/docs/ref/core-base.mdx

@@ -6,7 +6,13 @@ prev:
   label: "OTP-006: Contract Package"
 ---
 
-Every [contract](/book/contracts) and [trait](/book/types#traits) in Tact implicitly [inherits](/book/contracts#traits) the `BaseTrait{:tact}` trait, which contains a number of the most useful [internal functions](/book/contracts#internal-functions) for any kind of contract, and a constant `self.storageReserve{:tact}` aimed at advanced users of Tact.
+Every [contract](/book/contracts) in Tact implicitly [inherits](/book/contracts#traits) the `BaseTrait{:tact}` trait, which contains a number of the most useful [internal functions](/book/contracts#internal-functions) for any kind of contract, and a constant `self.storageReserve{:tact}` aimed at advanced users of Tact.
+
+:::tip
+
+  Prior to 1.6.0, `BaseTrait{:tact}` was also implicitly inherited by traits, but now you must explicitly specify `with BaseTrait{:tact}` for your traits to use it.
+
+:::
 
 ## Constants
 

src/stdlib/stdlib.ts

@@ -10,10 +10,11 @@ files["libs/content.tact"] =
     "fQ==";
 files["libs/deploy.tact"] =
     "Cm1lc3NhZ2UgRGVwbG95IHsKICAgIHF1ZXJ5SWQ6IEludCBhcyB1aW50NjQ7Cn0KCm1lc3NhZ2UgRGVwbG95T2sgewogICAgcXVlcnlJZDogSW50IGFzIHVpbnQ2NDsK" +
-    "fQoKdHJhaXQgRGVwbG95YWJsZSB7CiAgICByZWNlaXZlKGRlcGxveTogRGVwbG95KSB7CiAgICAgICAgc2VsZi5ub3RpZnkoRGVwbG95T2t7cXVlcnlJZDogZGVwbG95" +
-    "LnF1ZXJ5SWR9LnRvQ2VsbCgpKTsKICAgIH0KfQoKbWVzc2FnZSBGYWN0b3J5RGVwbG95IHsKICAgIHF1ZXJ5SWQ6IEludCBhcyB1aW50NjQ7CiAgICBjYXNoYmFjazog" +
-    "QWRkcmVzczsKfQoKdHJhaXQgRmFjdG9yeURlcGxveWFibGUgIHsKICAgIHJlY2VpdmUoZGVwbG95OiBGYWN0b3J5RGVwbG95KSB7CiAgICAgICAgc2VsZi5mb3J3YXJk" +
-    "KGRlcGxveS5jYXNoYmFjaywgRGVwbG95T2t7cXVlcnlJZDogZGVwbG95LnF1ZXJ5SWR9LnRvQ2VsbCgpLCBmYWxzZSwgbnVsbCk7CiAgICB9Cn0=";
+    "fQoKdHJhaXQgRGVwbG95YWJsZSB3aXRoIEJhc2VUcmFpdCB7CiAgICByZWNlaXZlKGRlcGxveTogRGVwbG95KSB7CiAgICAgICAgc2VsZi5ub3RpZnkoRGVwbG95T2t7" +
+    "cXVlcnlJZDogZGVwbG95LnF1ZXJ5SWR9LnRvQ2VsbCgpKTsKICAgIH0KfQoKbWVzc2FnZSBGYWN0b3J5RGVwbG95IHsKICAgIHF1ZXJ5SWQ6IEludCBhcyB1aW50NjQ7" +
+    "CiAgICBjYXNoYmFjazogQWRkcmVzczsKfQoKdHJhaXQgRmFjdG9yeURlcGxveWFibGUgd2l0aCBCYXNlVHJhaXQgIHsKICAgIHJlY2VpdmUoZGVwbG95OiBGYWN0b3J5" +
+    "RGVwbG95KSB7CiAgICAgICAgc2VsZi5mb3J3YXJkKGRlcGxveS5jYXNoYmFjaywgRGVwbG95T2t7cXVlcnlJZDogZGVwbG95LnF1ZXJ5SWR9LnRvQ2VsbCgpLCBmYWxz" +
+    "ZSwgbnVsbCk7CiAgICB9Cn0K";
 files["libs/dns.fc"] =
     "c2xpY2UgZG5zX3N0cmluZ190b19pbnRlcm5hbChzbGljZSBkb21haW4pIGlubGluZV9yZWYgewoKICAgIDs7IFNwZWNpYWwgY2FzZSBmb3Igcm9vdCBkb21haW4KICAg" +
     "IGlmICgoZG9tYWluLnNsaWNlX2JpdHMoKSA9PSA4KSAmIChkb21haW4uc2xpY2VfcmVmcygpID09IDApKSB7CiAgICAgICAgaWYgKGRvbWFpbi5wcmVsb2FkX3VpbnQo" +
@@ -89,13 +90,13 @@ files["libs/dns.tact"] =
 files["libs/ownable.tact"] =
     "bWVzc2FnZSBDaGFuZ2VPd25lciB7CiAgICBxdWVyeUlkOiBJbnQgYXMgdWludDY0OwogICAgbmV3T3duZXI6IEFkZHJlc3M7Cn0KCm1lc3NhZ2UgQ2hhbmdlT3duZXJP" +
     "ayB7CiAgICBxdWVyeUlkOiBJbnQgYXMgdWludDY0OwogICAgbmV3T3duZXI6IEFkZHJlc3M7Cn0KCkBpbnRlcmZhY2UoIm9yZy50b24ub3duYWJsZSIpCnRyYWl0IE93" +
-    "bmFibGUgewogICAgb3duZXI6IEFkZHJlc3M7CgogICAgZnVuIHJlcXVpcmVPd25lcigpIHsKICAgICAgICBuYXRpdmVUaHJvd1VubGVzcygxMzIsIHNlbmRlcigpID09" +
-    "IHNlbGYub3duZXIpOwogICAgfQoKICAgIGdldCBmdW4gb3duZXIoKTogQWRkcmVzcyB7CiAgICAgICAgcmV0dXJuIHNlbGYub3duZXI7CiAgICB9Cn0KCkBpbnRlcmZh" +
-    "Y2UoIm9yZy50b24ub3duYWJsZS50cmFuc2ZlcmFibGUudjIiKQp0cmFpdCBPd25hYmxlVHJhbnNmZXJhYmxlIHdpdGggT3duYWJsZSB7CgogICAgb3duZXI6IEFkZHJl" +
-    "c3M7CgogICAgcmVjZWl2ZShtc2c6IENoYW5nZU93bmVyKSB7CiAgICAgICAgCiAgICAgICAgLy8gQ2hlY2sgaWYgdGhlIHNlbmRlciBpcyB0aGUgb3duZXIKICAgICAg" +
-    "ICBzZWxmLnJlcXVpcmVPd25lcigpOwoKICAgICAgICAvLyBVcGRhdGUgb3duZXIKICAgICAgICBzZWxmLm93bmVyID0gbXNnLm5ld093bmVyOwoKICAgICAgICAvLyBS" +
-    "ZXBseSByZXN1bHQKICAgICAgICBzZWxmLnJlcGx5KENoYW5nZU93bmVyT2t7IHF1ZXJ5SWQ6IG1zZy5xdWVyeUlkLCBuZXdPd25lcjptc2cubmV3T3duZXIgfS50b0Nl" +
-    "bGwoKSk7CiAgICB9Cn0=";
+    "bmFibGUgd2l0aCBCYXNlVHJhaXQgewogICAgb3duZXI6IEFkZHJlc3M7CgogICAgZnVuIHJlcXVpcmVPd25lcigpIHsKICAgICAgICBuYXRpdmVUaHJvd1VubGVzcygx" +
+    "MzIsIHNlbmRlcigpID09IHNlbGYub3duZXIpOwogICAgfQoKICAgIGdldCBmdW4gb3duZXIoKTogQWRkcmVzcyB7CiAgICAgICAgcmV0dXJuIHNlbGYub3duZXI7CiAg" +
+    "ICB9Cn0KCkBpbnRlcmZhY2UoIm9yZy50b24ub3duYWJsZS50cmFuc2ZlcmFibGUudjIiKQp0cmFpdCBPd25hYmxlVHJhbnNmZXJhYmxlIHdpdGggT3duYWJsZSB7Cgog" +
+    "ICAgb3duZXI6IEFkZHJlc3M7CgogICAgcmVjZWl2ZShtc2c6IENoYW5nZU93bmVyKSB7CiAgICAgICAgCiAgICAgICAgLy8gQ2hlY2sgaWYgdGhlIHNlbmRlciBpcyB0" +
+    "aGUgb3duZXIKICAgICAgICBzZWxmLnJlcXVpcmVPd25lcigpOwoKICAgICAgICAvLyBVcGRhdGUgb3duZXIKICAgICAgICBzZWxmLm93bmVyID0gbXNnLm5ld093bmVy" +
+    "OwoKICAgICAgICAvLyBSZXBseSByZXN1bHQKICAgICAgICBzZWxmLnJlcGx5KENoYW5nZU93bmVyT2t7IHF1ZXJ5SWQ6IG1zZy5xdWVyeUlkLCBuZXdPd25lcjptc2cu" +
+    "bmV3T3duZXIgfS50b0NlbGwoKSk7CiAgICB9Cn0K";
 files["libs/stoppable.tact"] =
     "aW1wb3J0ICIuL293bmFibGUiOwoKQGludGVyZmFjZSgib3JnLnRvbi5zdG9wcGFibGUiKQp0cmFpdCBTdG9wcGFibGUgd2l0aCBPd25hYmxlIHsKICAgIAogICAgc3Rv" +
     "cHBlZDogQm9vbDsKICAgIG93bmVyOiBBZGRyZXNzOwoKICAgIGZ1biByZXF1aXJlTm90U3RvcHBlZCgpIHsKICAgICAgICByZXF1aXJlKCFzZWxmLnN0b3BwZWQsICJD" +

src/stdlib/stdlib/libs/deploy.tact

@@ -7,7 +7,7 @@ message DeployOk {
     queryId: Int as uint64;
 }
 
-trait Deployable {
+trait Deployable with BaseTrait {
     receive(deploy: Deploy) {
         self.notify(DeployOk{queryId: deploy.queryId}.toCell());
     }
@@ -18,8 +18,8 @@ message FactoryDeploy {
     cashback: Address;
 }
 
-trait FactoryDeployable  {
+trait FactoryDeployable with BaseTrait  {
     receive(deploy: FactoryDeploy) {
         self.forward(deploy.cashback, DeployOk{queryId: deploy.queryId}.toCell(), false, null);
     }
-}
+}

src/stdlib/stdlib/libs/ownable.tact

@@ -9,7 +9,7 @@ message ChangeOwnerOk {
 }
 
 @interface("org.ton.ownable")
-trait Ownable {
+trait Ownable with BaseTrait {
     owner: Address;
 
     fun requireOwner() {
@@ -37,4 +37,4 @@ trait OwnableTransferable with Ownable {
         // Reply result
         self.reply(ChangeOwnerOk{ queryId: msg.queryId, newOwner:msg.newOwner }.toCell());
     }
-}
+}

src/test/e2e-emulated/base-trait-constant-override-1.spec.ts

@@ -0,0 +1,36 @@
+import { toNano } from "@ton/core";
+import { Blockchain, SandboxContract, TreasuryContract } from "@ton/sandbox";
+import { TraitsConstantContract } from "./contracts/output/base-trait-constant-override-1_TraitsConstantContract";
+import "@ton/test-utils";
+
+describe("base-trait-constant-override-1", () => {
+    let blockchain: Blockchain;
+    let treasure: SandboxContract<TreasuryContract>;
+    let contract: SandboxContract<TraitsConstantContract>;
+
+    beforeEach(async () => {
+        blockchain = await Blockchain.create();
+        treasure = await blockchain.treasury("treasure");
+
+        contract = blockchain.openContract(
+            await TraitsConstantContract.fromInit(),
+        );
+
+        const deployResult = await contract.send(
+            treasure.getSender(),
+            { value: toNano("0.5") },
+            null,
+        );
+
+        expect(deployResult.transactions).toHaveTransaction({
+            from: treasure.address,
+            to: contract.address,
+            success: true,
+            deploy: true,
+        });
+    });
+
+    it("should override constant correctly", async () => {
+        expect(await contract.getConstant()).toEqual(100n);
+    });
+});

src/test/e2e-emulated/base-trait-constant-override-2.spec.ts

@@ -0,0 +1,36 @@
+import { toNano } from "@ton/core";
+import { Blockchain, SandboxContract, TreasuryContract } from "@ton/sandbox";
+import { TraitsConstantContract } from "./contracts/output/base-trait-constant-override-2_TraitsConstantContract";
+import "@ton/test-utils";
+
+describe("base-trait-constant-override-2", () => {
+    let blockchain: Blockchain;
+    let treasure: SandboxContract<TreasuryContract>;
+    let contract: SandboxContract<TraitsConstantContract>;
+
+    beforeEach(async () => {
+        blockchain = await Blockchain.create();
+        treasure = await blockchain.treasury("treasure");
+
+        contract = blockchain.openContract(
+            await TraitsConstantContract.fromInit(),
+        );
+
+        const deployResult = await contract.send(
+            treasure.getSender(),
+            { value: toNano("0.5") },
+            null,
+        );
+
+        expect(deployResult.transactions).toHaveTransaction({
+            from: treasure.address,
+            to: contract.address,
+            success: true,
+            deploy: true,
+        });
+    });
+
+    it("should override constant correctly", async () => {
+        expect(await contract.getConstant()).toEqual(10000n);
+    });
+});

src/test/e2e-emulated/base-trait-function-override.spec.ts

@@ -0,0 +1,36 @@
+import { toNano } from "@ton/core";
+import { Blockchain, SandboxContract, TreasuryContract } from "@ton/sandbox";
+import { BaseTraitsFunctionContract } from "./contracts/output/base-trait-function-override_BaseTraitsFunctionContract";
+import "@ton/test-utils";
+
+describe("base-trait-function-override", () => {
+    let blockchain: Blockchain;
+    let treasure: SandboxContract<TreasuryContract>;
+    let contract: SandboxContract<BaseTraitsFunctionContract>;
+
+    beforeEach(async () => {
+        blockchain = await Blockchain.create();
+        treasure = await blockchain.treasury("treasure");
+
+        contract = blockchain.openContract(
+            await BaseTraitsFunctionContract.fromInit(),
+        );
+
+        const deployResult = await contract.send(
+            treasure.getSender(),
+            { value: toNano("10") },
+            null,
+        );
+
+        expect(deployResult.transactions).toHaveTransaction({
+            from: treasure.address,
+            to: contract.address,
+            success: true,
+            deploy: true,
+        });
+    });
+
+    it("should override function correctly", async () => {
+        expect(await contract.getValue()).toEqual(1000n);
+    });
+});

src/test/e2e-emulated/contracts/base-trait-constant-override-1.tact

@@ -0,0 +1,13 @@
+trait OverrideBaseTraitConstant with BaseTrait {
+    override const storageReserve: Int = 100;
+}
+
+contract TraitsConstantContract with OverrideBaseTraitConstant {
+    receive() {
+        // deploy
+    }
+
+    get fun constant(): Int {
+        return self.storageReserve;
+    }
+}

src/test/e2e-emulated/contracts/base-trait-constant-override-2.tact

@@ -0,0 +1,17 @@
+trait OverrideBaseTraitConstantWithVirtual with BaseTrait {
+    override virtual const storageReserve: Int = 100;
+}
+
+trait OverrideOverridden with OverrideBaseTraitConstantWithVirtual {
+    override const storageReserve: Int = 10000;
+}
+
+contract TraitsConstantContract with OverrideOverridden {
+    receive() {
+        // deploy
+    }
+
+    get fun constant(): Int {
+        return self.storageReserve;
+    }
+}

src/test/e2e-emulated/contracts/base-trait-function-override.tact

@@ -0,0 +1,20 @@
+trait OverrideBaseTraitFunction with BaseTrait {
+    value: Int;
+
+    override fun notify(body: Cell?) {
+        self.value = 1000;
+    }
+}
+
+contract BaseTraitsFunctionContract with OverrideBaseTraitFunction {
+    value: Int = 0;
+
+    receive() {
+        // deploy
+    }
+
+    get fun value(): Int {
+        self.notify(null);
+        return self.value;
+    }
+}

src/test/e2e-emulated/contracts/traits.tact

@@ -1,4 +1,4 @@
-trait Animal {
+trait Animal with BaseTrait {
     abstract fun getType(): String;
     abstract fun getSound(): String;
 
@@ -33,7 +33,16 @@ trait Laika with Dog {
     }
 }
 
-contract LaikaContract with Laika {
-    // empty contract, we just inherit everything from the traits
+trait WithConstant {
+    virtual const foo: Int = 10;
 }
 
+trait IWantToOverrideConstant with WithConstant {
+    override const foo: Int = 100;
+}
+
+contract LaikaContract with Laika, IWantToOverrideConstant {
+    get fun fooConstant(): Int {
+        return self.foo;
+    }
+}

src/test/e2e-emulated/traits.spec.ts

@@ -33,4 +33,9 @@ describe("traits", () => {
         // Check the contract's behavior after deployment
         expect(await contract.getSay()).toBe("I am a Laika and I say Woof");
     });
+
+    it("should override constant correctly", async () => {
+        // Check the contract's behavior after deployment
+        expect(await contract.getFooConstant()).toBe(100n);
+    });
 });