json stringify with mixed-type variables and type assertions

src/codegen/stdlib/json.ts

@@ -1,4 +1,4 @@
-import { Expression, MethodCallNode, ObjectNode } from "../../ast/types.js";
+import { Expression, MethodCallNode, ObjectNode, TypeAssertionNode } from "../../ast/types.js";
 
 interface ExprBase {
   type: string;
@@ -500,7 +500,17 @@ export class JsonGenerator {
       return this.ctx.emitError("JSON.stringify() requires 1 argument", expr.loc);
     }
 
-    const arg = expr.args[0];
+    if (expr.args[0].type === "type_assertion") {
+      return this.generateStringifyArg(
+        (expr.args[0] as unknown as TypeAssertionNode).expression,
+        expr,
+        params,
+      );
+    }
+    return this.generateStringifyArg(expr.args[0], expr, params);
+  }
+
+  private generateStringifyArg(arg: Expression, expr: MethodCallNode, params: string[]): string {
     const spaces = this.getSpaces(expr);
 
     if (this.ctx.isStringExpression(arg)) {

tests/fixtures/builtins/json-stringify-mixed-vars.ts

@@ -0,0 +1,8 @@
+// @test-description: json stringify inline object with mixed string and number variable values
+const name = "hello";
+const count = 42;
+const ts = 1234567890;
+const result = JSON.stringify({ name: name, count: count, ts: ts });
+if (result.includes("hello") && result.includes("42") && result.includes("1234567890")) {
+  console.log("TEST_PASSED");
+}

tests/fixtures/builtins/json-stringify-type-assertion.ts

@@ -0,0 +1,8 @@
+// @test-description: json stringify inline object with type assertion does not crash
+const name = "hello";
+const count = 42;
+const ts = 1234567890;
+const result = JSON.stringify({ name: name, count: count, ts: ts } as any);
+if (result.includes("hello") && result.includes("42") && result.includes("1234567890")) {
+  console.log("TEST_PASSED");
+}