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Resolve WhenClause in SwitchStatement cases.
Change-Id: I836d0bec357597490ad7302e90ff9e4740547810 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/264880 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Samuel Rawlins <srawlins@google.com> Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
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@ -778,14 +778,23 @@ class ResolverVisitor extends ThrowingAstVisitor<void>
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getSwitchStatementMemberInfo(covariant SwitchStatement node, int index) {
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var member = node.members[index];
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AstNode? pattern;
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WhenClause? whenClause;
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if (member is SwitchCase) {
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pattern = member.expression;
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} else if (member is SwitchPatternCase) {
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pattern = member.pattern;
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whenClause = member.whenClause;
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}
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return SwitchStatementMemberInfo(
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[CaseHeadOrDefaultInfo(pattern: pattern)], member.statements,
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labels: member.labels);
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[
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CaseHeadOrDefaultInfo(
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pattern: pattern,
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guard: whenClause?.expression,
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),
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],
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member.statements,
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labels: member.labels,
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);
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}
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@override
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@ -144,6 +144,82 @@ IfStatement
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thenStatement: Block
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leftBracket: {
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rightBracket: }
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''');
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}
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test_rewrite_whenClause() async {
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await assertNoErrorsInCode(r'''
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void f(x, bool Function() a) {
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if (x case 0 when a()) {}
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}
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''');
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final node = findNode.ifStatement('if');
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assertResolvedNodeText(node, r'''
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IfStatement
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ifKeyword: if
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leftParenthesis: (
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condition: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: dynamic
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caseClause: CaseClause
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caseKeyword: case
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pattern: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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whenClause: WhenClause
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whenKeyword: when
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expression: FunctionExpressionInvocation
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function: SimpleIdentifier
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token: a
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staticElement: self::@function::f::@parameter::a
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staticType: bool Function()
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argumentList: ArgumentList
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leftParenthesis: (
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rightParenthesis: )
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staticElement: <null>
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staticInvokeType: bool Function()
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staticType: bool
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rightParenthesis: )
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thenStatement: Block
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leftBracket: {
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rightBracket: }
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''');
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}
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test_whenClause() async {
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await assertNoErrorsInCode(r'''
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void f(x) {
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if (x case 0 when true) {}
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}
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''');
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final node = findNode.ifStatement('if');
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assertResolvedNodeText(node, r'''
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IfStatement
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ifKeyword: if
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leftParenthesis: (
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condition: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: dynamic
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caseClause: CaseClause
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caseKeyword: case
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pattern: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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whenClause: WhenClause
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whenKeyword: when
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expression: BooleanLiteral
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literal: true
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staticType: bool
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rightParenthesis: )
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thenStatement: Block
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leftBracket: {
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rightBracket: }
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''');
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}
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}
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266
pkg/analyzer/test/src/dart/resolution/switch_statement_test.dart
Normal file
266
pkg/analyzer/test/src/dart/resolution/switch_statement_test.dart
Normal file
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@ -0,0 +1,266 @@
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// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'package:test_reflective_loader/test_reflective_loader.dart';
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import 'context_collection_resolution.dart';
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main() {
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defineReflectiveSuite(() {
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defineReflectiveTests(SwitchStatementPatternTest);
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});
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}
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@reflectiveTest
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class SwitchStatementPatternTest extends PatternsResolutionTest {
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test_default() async {
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await assertNoErrorsInCode(r'''
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void f(Object? x) {
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switch (x) {
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case 0?:
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break;
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default:
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break;
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}
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}
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''');
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final node = findNode.switchStatement('switch');
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assertResolvedNodeText(node, r'''
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SwitchStatement
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: Object?
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rightParenthesis: )
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leftBracket: {
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members
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SwitchPatternCase
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keyword: case
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pattern: PostfixPattern
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operand: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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operator: ?
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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SwitchDefault
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keyword: default
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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rightBracket: }
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''');
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}
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test_mergeCases() async {
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await assertNoErrorsInCode(r'''
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void f(Object? x) {
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switch (x) {
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case 0?:
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case 1?:
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break;
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case 2?:
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break;
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}
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}
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''');
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final node = findNode.switchStatement('switch');
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assertResolvedNodeText(node, r'''
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SwitchStatement
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: Object?
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rightParenthesis: )
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leftBracket: {
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members
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SwitchPatternCase
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keyword: case
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pattern: PostfixPattern
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operand: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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operator: ?
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colon: :
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SwitchPatternCase
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keyword: case
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pattern: PostfixPattern
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operand: ConstantPattern
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expression: IntegerLiteral
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literal: 1
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staticType: int
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operator: ?
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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SwitchPatternCase
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keyword: case
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pattern: PostfixPattern
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operand: ConstantPattern
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expression: IntegerLiteral
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literal: 2
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staticType: int
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operator: ?
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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rightBracket: }
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''');
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}
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test_rewrite_pattern() async {
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await assertNoErrorsInCode(r'''
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void f(Object? x, int Function() a) {
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switch (x) {
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case const a():
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break;
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}
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}
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''');
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final node = findNode.switchStatement('switch');
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assertResolvedNodeText(node, r'''
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SwitchStatement
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: Object?
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rightParenthesis: )
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leftBracket: {
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members
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SwitchPatternCase
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keyword: case
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pattern: ConstantPattern
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const: const
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expression: FunctionExpressionInvocation
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function: SimpleIdentifier
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token: a
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staticElement: self::@function::f::@parameter::a
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staticType: int Function()
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argumentList: ArgumentList
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leftParenthesis: (
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rightParenthesis: )
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staticElement: <null>
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staticInvokeType: int Function()
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staticType: int
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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rightBracket: }
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''');
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}
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test_rewrite_whenClause() async {
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await assertNoErrorsInCode(r'''
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void f(Object? x, bool Function() a) {
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switch (x) {
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case 0 when a():
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break;
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}
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}
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''');
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final node = findNode.switchStatement('switch');
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assertResolvedNodeText(node, r'''
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SwitchStatement
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: Object?
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rightParenthesis: )
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leftBracket: {
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members
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SwitchPatternCase
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keyword: case
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pattern: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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whenClause: WhenClause
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whenKeyword: when
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expression: FunctionExpressionInvocation
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function: SimpleIdentifier
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token: a
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staticElement: self::@function::f::@parameter::a
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staticType: bool Function()
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argumentList: ArgumentList
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leftParenthesis: (
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rightParenthesis: )
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staticElement: <null>
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staticInvokeType: bool Function()
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staticType: bool
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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rightBracket: }
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''');
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}
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test_whenClause() async {
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await assertNoErrorsInCode(r'''
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void f(Object? x) {
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switch (x) {
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case 0 when true:
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break;
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}
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}
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''');
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final node = findNode.switchStatement('switch');
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assertResolvedNodeText(node, r'''
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SwitchStatement
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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staticElement: self::@function::f::@parameter::x
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staticType: Object?
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rightParenthesis: )
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leftBracket: {
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members
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SwitchPatternCase
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keyword: case
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pattern: ConstantPattern
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expression: IntegerLiteral
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literal: 0
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staticType: int
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whenClause: WhenClause
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whenKeyword: when
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expression: BooleanLiteral
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literal: true
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staticType: bool
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colon: :
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statements
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BreakStatement
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breakKeyword: break
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semicolon: ;
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rightBracket: }
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''');
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}
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}
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@ -77,6 +77,7 @@ import 'record_type_annotation_test.dart' as record_type_annotation;
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import 'relational_pattern_test.dart' as relational_pattern;
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import 'simple_identifier_test.dart' as simple_identifier;
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import 'super_formal_parameter_test.dart' as super_formal_parameter;
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import 'switch_statement_test.dart' as super_formal_parameter2;
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import 'top_level_variable_test.dart' as top_level_variable;
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import 'top_type_inference_test.dart' as top_type_inference;
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import 'try_statement_test.dart' as try_statement;
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@ -158,6 +159,7 @@ main() {
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relational_pattern.main();
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simple_identifier.main();
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super_formal_parameter.main();
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super_formal_parameter2.main();
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top_level_variable.main();
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top_type_inference.main();
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try_statement.main();
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