// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/parse/testdata/operators/fail_chained_assign.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/operators/fail_chained_assign.carbon

fn F() {
  var a: i32;
  var b: i32;

  // TODO: Produce a custom diagnostic for this.
  // CHECK:STDERR: fail_chained_assign.carbon:[[@LINE+4]]:9: error: operator `=` can only be used as a complete statement [StatementOperatorAsSubExpr]
  // CHECK:STDERR:   a = b = 1;
  // CHECK:STDERR:         ^
  // CHECK:STDERR:
  a = b = 1;
}

// CHECK:STDOUT: - filename: fail_chained_assign.carbon
// CHECK:STDOUT:   ╭─FileStart ''
// CHECK:STDOUT:   │   ╭─FunctionIntroducer 'fn'
// CHECK:STDOUT:   │   ├─IdentifierNameMaybeBeforeSignature 'F'
// CHECK:STDOUT:   │   │ ╭─ExplicitParamListStart '('
// CHECK:STDOUT:   │   ├─ExplicitParamList ')'
// CHECK:STDOUT:   │ ╭─FunctionDefinitionStart '{'
// CHECK:STDOUT:   │ │ ╭─VariableIntroducer 'var'
// CHECK:STDOUT:   │ │ │   ╭─IdentifierNameNotBeforeSignature 'a'
// CHECK:STDOUT:   │ │ │   ├─BindingPatternTypeStart ':'
// CHECK:STDOUT:   │ │ │   ├─IntTypeLiteral 'i32'
// CHECK:STDOUT:   │ │ │ ╭─VarBindingPattern ':'
// CHECK:STDOUT:   │ │ ├─VariablePattern 'var'
// CHECK:STDOUT:   │ ├─VariableDecl ';'
// CHECK:STDOUT:   │ │ ╭─VariableIntroducer 'var'
// CHECK:STDOUT:   │ │ │   ╭─IdentifierNameNotBeforeSignature 'b'
// CHECK:STDOUT:   │ │ │   ├─BindingPatternTypeStart ':'
// CHECK:STDOUT:   │ │ │   ├─IntTypeLiteral 'i32'
// CHECK:STDOUT:   │ │ │ ╭─VarBindingPattern ':'
// CHECK:STDOUT:   │ │ ├─VariablePattern 'var'
// CHECK:STDOUT:   │ ├─VariableDecl ';'
// CHECK:STDOUT:   │ │     ╭─IdentifierNameExpr 'a'
// CHECK:STDOUT:   │ │     ├─IdentifierNameExpr 'b'
// CHECK:STDOUT:   │ │   ╭─InfixOperatorEqual '='
// CHECK:STDOUT:   │ │   ├─IntLiteral '1'
// CHECK:STDOUT:   │ │ ╭─InfixOperatorEqual '=' has_error
// CHECK:STDOUT:   │ ├─ExprStatement ';'
// CHECK:STDOUT:   ├─FunctionDefinition '}'
// CHECK:STDOUT:   ├─FileEnd ''
// CHECK:STDOUT:   (root)