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//===--- DiagnosticEngine.swift -------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2022 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
//
//===----------------------------------------------------------------------===//
import ASTBridging
import Basic
public typealias DiagID = BridgedDiagID
public protocol DiagnosticArgument {
func _withBridgedDiagnosticArgument(_ fn: (BridgedDiagnosticArgument) -> Void)
}
extension String: DiagnosticArgument {
public func _withBridgedDiagnosticArgument(_ fn: (BridgedDiagnosticArgument) -> Void) {
_withBridgedStringRef { fn(BridgedDiagnosticArgument($0)) }
}
}
extension Int: DiagnosticArgument {
public func _withBridgedDiagnosticArgument(_ fn: (BridgedDiagnosticArgument) -> Void) {
fn(BridgedDiagnosticArgument(self))
}
}
public struct DiagnosticFixIt {
public let start: SourceLoc
public let byteLength: Int
public let text: String
public init(start: SourceLoc, byteLength: Int, replacement text: String) {
self.start = start
self.byteLength = byteLength
self.text = text
}
func withBridgedDiagnosticFixIt(_ fn: (BridgedDiagnosticFixIt) -> Void) {
text._withBridgedStringRef { bridgedTextRef in
let bridgedDiagnosticFixIt = BridgedDiagnosticFixIt(
start.bridged, UInt32(byteLength),
bridgedTextRef)
fn(bridgedDiagnosticFixIt)
}
}
}
public struct DiagnosticEngine {
private let bridged: BridgedDiagnosticEngine
public init(bridged: BridgedDiagnosticEngine) {
self.bridged = bridged
}
public init?(bridged: BridgedNullableDiagnosticEngine) {
guard let raw = bridged.raw else {
return nil
}
self.bridged = BridgedDiagnosticEngine(raw: raw)
}
public func diagnose(_ position: SourceLoc?,
_ id: DiagID,
_ args: [DiagnosticArgument],
highlight: CharSourceRange? = nil,
fixIts: [DiagnosticFixIt] = []) {
let bridgedSourceLoc: BridgedSourceLoc = position.bridged
let highlightStart: BridgedSourceLoc
let highlightLength: UInt32
if let highlight = highlight {
highlightStart = highlight.start.bridged
highlightLength = highlight.byteLength
} else {
highlightStart = BridgedSourceLoc()
highlightLength = 0
}
var bridgedArgs: [BridgedDiagnosticArgument] = []
var bridgedFixIts: [BridgedDiagnosticFixIt] = []
// Build a higher-order function to wrap every 'withBridgedXXX { ... }'
// calls, so we don't escape anything from the closure. 'bridgedArgs' and
// 'bridgedFixIts' are temporary storage to store bridged values. So they
// should not be used after the closure is executed.
var closure: () -> Void = {
bridgedArgs.withBridgedArrayRef { bridgedArgsRef in
bridgedFixIts.withBridgedArrayRef { bridgedFixItsRef in
bridged.diagnose(at: bridgedSourceLoc, id, bridgedArgsRef,
highlightAt: highlightStart,
highlightLength: highlightLength,
fixIts: bridgedFixItsRef)
}
}
}
// 'reversed()' because the closure should be wrapped in that order.
for arg in args.reversed() {
closure = { [closure, arg] in
arg._withBridgedDiagnosticArgument { bridgedArg in
bridgedArgs.append(bridgedArg)
closure()
}
}
}
// 'reversed()' because the closure should be wrapped in that order.
for fixIt in fixIts.reversed() {
closure = { [closure, fixIt] in
fixIt.withBridgedDiagnosticFixIt { bridgedFixIt in
bridgedFixIts.append(bridgedFixIt)
closure()
}
}
}
closure()
}
public func diagnose(_ position: SourceLoc?,
_ id: DiagID,
_ args: DiagnosticArgument...,
highlight: CharSourceRange? = nil,
fixIts: DiagnosticFixIt...) {
diagnose(position, id, args, highlight: highlight, fixIts: fixIts)
}
}
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