address review comments.

Author: nkcsgexi

Sources/SwiftSyntax/SyntaxParser.swift

@@ -34,13 +34,13 @@ public enum ParserError: Error, CustomStringConvertible {
  case invalidSyntaxData
 
  /// The SwiftSyntax parser library isn't compatible with this client
- case hashVerificationFailed
+ case parserCompatibilityCheckFailed
 
  public var description: String {
  switch self {
  case .invalidSyntaxData:
  return "parser created invalid syntax data"
- case .hashVerificationFailed:
+ case .parserCompatibilityCheckFailed:
  return "SwiftSyntax parser library isn't compatible"
  }
  }
@@ -83,13 +83,16 @@ public struct SyntaxParser {
  source: String,
  parseLookup: IncrementalParseLookup? = nil
  ) throws -> SourceFileSyntax {
+ guard nodeHashVerifyResult else {
+ throw ParserError.parserCompatibilityCheckFailed
+ }
  // Get a native UTF8 string for efficient indexing with UTF8 byte offsets.
  // If the string is backed by an NSString then such indexing will become
  // extremely slow.
  var utf8Source = source
  utf8Source.makeNativeUTF8IfNeeded()
 
- let rawSyntax = try parseRaw(utf8Source, parseLookup: parseLookup)
+ let rawSyntax = parseRaw(utf8Source, parseLookup: parseLookup)
 
  guard let file = makeSyntax(rawSyntax) as? SourceFileSyntax else {
  throw ParserError.invalidSyntaxData
@@ -117,11 +120,8 @@ public struct SyntaxParser {
  private static func parseRaw(
  _ source: String,
  parseLookup: IncrementalParseLookup?
- ) throws -> RawSyntax {
+ ) -> RawSyntax {
  assert(source.isNativeUTF8)
- guard nodeHashVerifyResult else {
- throw ParserError.hashVerificationFailed
- }
  let c_parser = swiftparse_parser_create()
  defer {
  swiftparse_parser_dispose(c_parser)