fix(const-eval): display an error for integer overflow at compile-time (

#200)

Closes #189

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `log2` and `log` math functions in `@stdlib/math`: PR [#166](https://github.com/tact-lang/tact/pull/166)
 - Reserve mode constants in `@stdlib/reserve`, namely `ReserveExact`, `ReserveAllExcept`, `ReserveAtMost`, `ReserveAddOriginalBalance`, `ReserveInvertSign`, `ReserveBounceIfActionFail`: PR [#173](https://github.com/tact-lang/tact/pull/173)
 - JSON Schema for `tact.config.json`: PR [#194](https://github.com/tact-lang/tact/pull/194)
+- Display an error for integer overflow at compile-time: PR [#200](https://github.com/tact-lang/tact/pull/200)
 
 ### Changed
 - Update the `dump` function to handle addresses: PR [#175](https://github.com/tact-lang/tact/pull/175)

src/types/__snapshots__/resolveDescriptors.spec.ts.snap

@@ -248,6 +248,16 @@ Line 15, col 3:
 "
 `;
 
+exports[`resolveDescriptors should fail descriptors for case-25 1`] = `
+"<unknown>:8:21: Cannot evaluate constant expression due to integer overflow
+Line 8, col 21:
+  7 | 
+> 8 | const a: Int = 1 + (1 >> -1073741824);
+                          ^~~~~~~~~~~~~~~~
+  9 | 
+"
+`;
+
 exports[`resolveDescriptors should resolve descriptors for case-0 1`] = `
 {
   "BaseTrait": {

src/types/resolveConstantValue.ts

@@ -5,7 +5,7 @@ import { ASTExpression, throwError } from "../grammar/ast";
 import { printTypeRef, TypeRef } from "./types";
 import { sha256_sync } from "@ton/crypto";
 
-function reduceInt(ast: ASTExpression): bigint {
+function reduceIntImpl(ast: ASTExpression): bigint {
     if (ast.kind === 'number') {
         return ast.value;
     } else if (ast.kind === 'op_binary') {
@@ -59,6 +59,18 @@ function reduceInt(ast: ASTExpression): bigint {
     throwError('Cannot reduce expression to a constant integer', ast.ref);
 }
 
+function reduceInt(ast: ASTExpression): bigint {
+  try {
+    return reduceIntImpl(ast)
+  } catch (error) {
+    if (error instanceof RangeError) {
+      throwError('Cannot evaluate constant expression due to integer overflow', ast.ref);
+    } else {
+      throw error;
+    }
+  }
+}
+
 function reduceBool(ast: ASTExpression): boolean {
     if (ast.kind === 'boolean') {
         return ast.value;

src/types/test-failed/case-25.tact

@@ -0,0 +1,8 @@
+primitive Int;
+primitive Bool;
+
+trait BaseTrait {
+
+}
+
+const a: Int = 1 + (1 >> -1073741824);