Nov 10, 2024 · Nov 3, 2024 · Nov 10, 2024
diff --git a/packages/eslint-plugin/tests/eslint-rules/prefer-const.test.ts b/packages/eslint-plugin/tests/eslint-rules/prefer-const.test.ts
 let x: number | undefined = 1;
 (x as number) += 1;
    `,
    `
 let x: number | undefined = 1;
 x!++;
    `,
    `
 let x: number | undefined = 1;
 (<number>x)++;
    `,
    `
 let x: number | undefined = 1;
 (x as number)++;
    `,
  ],
 });
diff --git a/packages/scope-manager/src/referencer/Referencer.ts b/packages/scope-manager/src/referencer/Referencer.ts
  }

  protected AssignmentExpression(node: TSESTree.AssignmentExpression): void {
    let left = node.left;
    switch (left.type) {
      case AST_NODE_TYPES.TSAsExpression:
      case AST_NODE_TYPES.TSTypeAssertion:
        // explicitly visit the type annotation
        this.visitType(left.typeAnnotation);
      // intentional fallthrough
      case AST_NODE_TYPES.TSNonNullExpression:
        // unwrap the expression
        left = left.expression;
    }
    const left = this.visitExpressionTarget(node.left);

    if (PatternVisitor.isPattern(left)) {
      if (node.operator === '=') {
  }

  protected UpdateExpression(node: TSESTree.UpdateExpression): void {
    if (PatternVisitor.isPattern(node.argument)) {
      this.visitPattern(node.argument, pattern => {
    const argument = this.visitExpressionTarget(node.argument);

    if (PatternVisitor.isPattern(argument)) {
      this.visitPattern(argument, pattern => {
        this.currentScope().referenceValue(
          pattern,
          ReferenceFlag.ReadWrite,

    this.close(node);
  }

  private visitExpressionTarget(left: TSESTree.Node) {
    switch (left.type) {
      case AST_NODE_TYPES.TSAsExpression:
      case AST_NODE_TYPES.TSTypeAssertion:
        // explicitly visit the type annotation
        this.visitType(left.typeAnnotation);
      // intentional fallthrough
      case AST_NODE_TYPES.TSNonNullExpression:
        // unwrap the expression
        left = left.expression;
    }

    return left;
  }
 }

 export { Referencer, type ReferencerOptions };
diff --git a/packages/scope-manager/tests/fixtures/type-assertion/increment/angle-bracket-increment.ts b/packages/scope-manager/tests/fixtures/type-assertion/increment/angle-bracket-increment.ts
 let x: number | undefined = 1;
 (<number>x)++;
diff --git a/...ges/scope-manager/tests/fixtures/type-assertion/increment/angle-bracket-increment.ts.shot b/...ges/scope-manager/tests/fixtures/type-assertion/increment/angle-bracket-increment.ts.shot
diff --git a/packages/scope-manager/tests/fixtures/type-assertion/increment/as-increment.ts b/packages/scope-manager/tests/fixtures/type-assertion/increment/as-increment.ts
 let x: number | undefined = 1;
 (x as number)++;
diff --git a/packages/scope-manager/tests/fixtures/type-assertion/increment/as-increment.ts.shot b/packages/scope-manager/tests/fixtures/type-assertion/increment/as-increment.ts.shot
diff --git a/packages/scope-manager/tests/fixtures/type-assertion/increment/non-null-increment.ts b/packages/scope-manager/tests/fixtures/type-assertion/increment/non-null-increment.ts
 let x: number | undefined = 1;
 x!++;
diff --git a/packages/scope-manager/tests/fixtures/type-assertion/increment/non-null-increment.ts.shot b/packages/scope-manager/tests/fixtures/type-assertion/increment/non-null-increment.ts.shot
Original file line number	Diff line number	Diff line change
Expand Up		@@ -21,5 +21,17 @@ let x: number \| undefined = 1;
		let x: number \| undefined = 1;
		(x as number) += 1;
		`,
		`
		let x: number \| undefined = 1;
		x!++;
		`,
		`
		let x: number \| undefined = 1;
		(<number>x)++;
		`,
		`
		let x: number \| undefined = 1;
		(x as number)++;
		`,
		],
		});
Original file line number	Diff line number	Diff line change
Expand Up		@@ -325,17 +325,7 @@ class Referencer extends Visitor {
		}

		protected AssignmentExpression(node: TSESTree.AssignmentExpression): void {
		let left = node.left;
		switch (left.type) {
		case AST_NODE_TYPES.TSAsExpression:
		case AST_NODE_TYPES.TSTypeAssertion:
		// explicitly visit the type annotation
		this.visitType(left.typeAnnotation);
		// intentional fallthrough
		case AST_NODE_TYPES.TSNonNullExpression:
		// unwrap the expression
		left = left.expression;
		}
		const left = this.visitExpressionTarget(node.left);

		if (PatternVisitor.isPattern(left)) {
		if (node.operator === '=') {
Expand DownExpand Up		@@ -752,8 +742,10 @@ class Referencer extends Visitor {
		}

		protected UpdateExpression(node: TSESTree.UpdateExpression): void {
		if (PatternVisitor.isPattern(node.argument)) {
		this.visitPattern(node.argument, pattern => {
		const argument = this.visitExpressionTarget(node.argument);

		if (PatternVisitor.isPattern(argument)) {
		this.visitPattern(argument, pattern => {
		this.currentScope().referenceValue(
		pattern,
		ReferenceFlag.ReadWrite,
Expand DownExpand Up		@@ -811,6 +803,21 @@ class Referencer extends Visitor {

		this.close(node);
		}

		private visitExpressionTarget(left: TSESTree.Node) {
		switch (left.type) {
		case AST_NODE_TYPES.TSAsExpression:
		case AST_NODE_TYPES.TSTypeAssertion:
		// explicitly visit the type annotation
		this.visitType(left.typeAnnotation);
		// intentional fallthrough
		case AST_NODE_TYPES.TSNonNullExpression:
		// unwrap the expression
		left = left.expression;
		}

		return left;
		}
		}

		export { Referencer, type ReferencerOptions };
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		let x: number \| undefined = 1;
		(x as number)++;