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Diagnostics only work with `SourceLoc` which is basically a pointer into a buffer of the loaded source file. But when debug info is de-serialized, the SIL `Location` consists of a filename+line+column. To "convert" this to a `SourceLoc`, the file must be loaded. This change adds `DiagnosticEngine.getLocationFromExternalSource` for this purpose. Also, the new protocol `ProvidingSourceLocation` - to which `SourceLoc` and `Location` conform - help to generalize the helper struct `Diagnostic` and make this "conversion" happen automatically.
58 lines
1.7 KiB
Swift
58 lines
1.7 KiB
Swift
//===--- SourceLoc.swift - SourceLoc bridging utilities ------------------===//
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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) 2022 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 https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import BasicBridging
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/// Represents a location in source code.
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/// It is basically a pointer into a buffer of the loaded source file (managed by `DiagnosticEngine`).
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/// In contrast to just having a filename+line+column, this allows displaying the context around
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/// the location when printing diagnostics.
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public struct SourceLoc {
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public let bridged: BridgedSourceLoc
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public init?(bridged: BridgedSourceLoc) {
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guard bridged.isValid else {
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return nil
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}
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self.bridged = bridged
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}
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}
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extension SourceLoc {
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public func advanced(by n: Int) -> SourceLoc {
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SourceLoc(bridged: bridged.advanced(by: n))!
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}
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}
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extension Optional where Wrapped == SourceLoc {
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public var bridged: BridgedSourceLoc {
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self?.bridged ?? .init()
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}
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}
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public struct CharSourceRange {
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public let start: SourceLoc
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public let byteLength: UInt32
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public init(start: SourceLoc, byteLength: UInt32) {
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self.start = start
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self.byteLength = byteLength
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}
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public init?(bridgedStart: BridgedSourceLoc, byteLength: UInt32) {
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guard let start = SourceLoc(bridged: bridgedStart) else {
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return nil
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}
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self.init(start: start, byteLength: byteLength)
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}
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}
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