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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
@_spi(RawSyntax) import SwiftParser
@_spi(RawSyntax) import SwiftSyntax
import XCTest
final class PatternTests: ParserTestCase {
private var genericArgEnumPattern: Syntax {
// let E<Int>.e(y)
Syntax(
ValueBindingPatternSyntax(
bindingSpecifier: .keyword(.let),
pattern: ExpressionPatternSyntax(
expression: FunctionCallExprSyntax(
calledExpression: MemberAccessExprSyntax(
base: GenericSpecializationExprSyntax(
expression: DeclReferenceExprSyntax(baseName: .identifier("E")),
genericArgumentClause: GenericArgumentClauseSyntax(
arguments: .init([
.init(argument: IdentifierTypeSyntax(name: .identifier("Int")))
])
)
),
name: .identifier("e")
),
leftParen: .leftParenToken(),
arguments: LabeledExprListSyntax([
.init(
expression: PatternExprSyntax(
pattern: IdentifierPatternSyntax(identifier: .identifier("y"))
)
)
]),
rightParen: .rightParenToken()
)
)
)
)
}
func testNonBinding1() {
assertParse(
"""
if case let E<Int>.e(y) = x {}
""",
substructure: genericArgEnumPattern
)
}
func testNonBinding2() {
assertParse(
"""
switch e {
case let E<Int>.e(y):
y
}
""",
substructure: genericArgEnumPattern
)
}
private var tupleWithSubscriptAndBindingPattern: Syntax {
// let (y[0], z)
Syntax(
ValueBindingPatternSyntax(
bindingSpecifier: .keyword(.let),
pattern: ExpressionPatternSyntax(
expression: TupleExprSyntax(
elements: .init([
.init(
expression: SubscriptCallExprSyntax(
calledExpression: DeclReferenceExprSyntax(baseName: .identifier("y")),
leftSquare: .leftSquareToken(),
arguments: LabeledExprListSyntax([
.init(expression: IntegerLiteralExprSyntax(literal: .integerLiteral("0")))
]),
rightSquare: .rightSquareToken()
),
trailingComma: .commaToken()
),
.init(
expression: PatternExprSyntax(
pattern: IdentifierPatternSyntax(identifier: .identifier("z"))
)
),
])
)
)
)
)
}
func testNonBinding3() {
assertParse(
"""
if case let (y[0], z) = x {}
""",
substructure: tupleWithSubscriptAndBindingPattern
)
}
func testNonBinding4() {
assertParse(
"""
switch x {
case let (y[0], z):
z
}
""",
substructure: tupleWithSubscriptAndBindingPattern
)
}
private var subscriptWithBindingPattern: Syntax {
// let y[z]
Syntax(
ValueBindingPatternSyntax(
bindingSpecifier: .keyword(.let),
pattern: ExpressionPatternSyntax(
expression: SubscriptCallExprSyntax(
calledExpression: DeclReferenceExprSyntax(baseName: .identifier("y")),
leftSquare: .leftSquareToken(),
arguments: LabeledExprListSyntax([
.init(
expression: PatternExprSyntax(
pattern: IdentifierPatternSyntax(identifier: .identifier("z"))
)
)
]),
rightSquare: .rightSquareToken()
)
)
)
)
}
func testNonBinding5() {
assertParse(
"""
if case let y[z] = x {}
""",
substructure: subscriptWithBindingPattern
)
}
func testNonBinding6() {
assertParse(
"""
switch 0 {
case let y[z]:
z
case y[z]:
0
default:
0
}
""",
substructure: subscriptWithBindingPattern
)
}
func testPatternAsPlaceholderExpr() {
assertParse(
"let 1️⃣<#name#> = 2️⃣<#value#>",
substructure: VariableDeclSyntax(
bindingSpecifier: .keyword(.let),
bindings: [
PatternBindingSyntax(
pattern: IdentifierPatternSyntax(
identifier: .identifier("<#name#>")
),
initializer: InitializerClauseSyntax(
value: DeclReferenceExprSyntax(
baseName: .identifier("<#value#>")
)
)
)
]
),
diagnostics: [
DiagnosticSpec(locationMarker: "1️⃣", message: "editor placeholder in source file"),
DiagnosticSpec(locationMarker: "2️⃣", message: "editor placeholder in source file"),
]
)
}
}
|
