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42 lines
2.0 KiB
Swift
42 lines
2.0 KiB
Swift
//===--- RangeDiagnostics.swift -------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// RUN: %target-parse-verify-swift
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func assertCollection<C: Collection>(_: C) {}
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assertCollection(0..<10)
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// The point of this test is to check that we don't allow indexing
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// Range<Int> et al with Int outside a generic context, to prevent the
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// problem that r[0] will be invalid when 0 is not contained int he
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// range.
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// Many of these error messages are terrible. If the test starts
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// failing because the error message improves, obviously, update the
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// test!
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let r0: Range = 10..<100
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let r1: Range = UInt(10)..<100
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let r2: Range = 10...100
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let r3: Range = UInt(10)...100
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r0[0] // expected-error {{ambiguous use of 'subscript'}}
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r1[UInt(0)] // expected-error {{ambiguous use of 'subscript'}}
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r1[0] // expected-error {{ambiguous use of 'subscript'}}
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r2[0] // expected-error {{ambiguous use of 'subscript'}}
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r3[0] // expected-error {{ambiguous use of 'subscript'}}
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r0[0..<4] // FIXME-error {{cannot subscript a value of type 'Range<Int>' with an index of type 'Range<Int>'}}
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r1[0..<4] // FIXME-error {{cannot subscript a value of type 'Range<UInt>' with an index of type 'Range<Int>'}}
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r2[0..<4] // FIXME-error {{cannot subscript a value of type 'Range<Int>' with an index of type 'Range<Int>'}}
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r3[0..<4] // FIXME-error {{cannot subscript a value of type 'Range<UInt>' with an index of type 'Range<Int>'}}
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(10..<100)[0] // expected-error {{ambiguous use of 'subscript'}}
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(UInt(10)...100)[0..<4] // FIXME-error {{cannot subscript a value of type 'Range<UInt>' with an index of type 'Range<Int>'}}
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