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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 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
//
//===----------------------------------------------------------------------===//
import ArgumentParser
import SwiftDiagnostics
import SwiftParser
import SwiftParserDiagnostics
import SwiftSyntax
struct VerifyRoundTrip: ParsableCommand, ParseCommand {
static var configuration = CommandConfiguration(
commandName: "verify-round-trip",
abstract: "Verify that printing the parsed syntax tree produces the original source"
)
init() {}
init(sourceFile: String?) {
self.arguments.sourceFile = sourceFile
}
@OptionGroup
var arguments: ParseArguments
enum Error: Swift.Error, CustomStringConvertible {
case roundTripFailed
public var description: String {
switch self {
case .roundTripFailed:
return "Round-tripping the source file failed"
}
}
}
func run() throws {
try sourceFileContents.withUnsafeBufferPointer { sourceBuffer in
try Self.run(
source: sourceBuffer,
foldSequences: foldSequences
)
}
}
static func run(
source: UnsafeBufferPointer<UInt8>,
foldSequences: Bool
) throws {
let tree = Parser.parse(source: source)
var diags = ParseDiagnosticsGenerator.diagnostics(for: tree)
let resultTree: Syntax
if foldSequences {
let folded = foldAllSequences(tree)
resultTree = folded.0
diags += folded.1
} else {
resultTree = Syntax(tree)
}
_ = DiagnosticsFormatter.annotatedSource(tree: tree, diags: diags)
if resultTree.syntaxTextBytes != [UInt8](source) {
throw Error.roundTripFailed
}
}
}
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