Merge pull request #752 from CodaFi/five-alarm-fire

Author: CodaFi

Sources/SwiftParser/CharacterInfo.swift

@@ -93,7 +93,6 @@ extension Unicode.Scalar {
   }
 }
 
-#if swift(<5.7)
 extension UnsafeRawBufferPointer {
   /// Returns a typed buffer to the memory referenced by this buffer,
   /// assuming that the memory is already bound to the specified type.
@@ -122,7 +121,6 @@ extension UnsafeRawBufferPointer {
     return .init(start: s.assumingMemoryBound(to: T.self), count: n)
   }
 }
-#endif
 
 private var InfoTable: CharacterInfoTable = (
   // 0 NUL        1 SOH         2 STX         3 ETX

Sources/SwiftSyntax/BumpPtrAllocator.swift

@@ -163,7 +163,6 @@ public class BumpPtrAllocator {
 
 // MARK: Compatibilty Shims
 
-#if swift(<5.7)
 extension UnsafeMutableRawPointer {
   /// Obtain the next pointer whose bit pattern is a multiple of alignment.
   ///
@@ -181,4 +180,3 @@ extension UnsafeMutableRawPointer {
     return .init(bitPattern: bits)!
   }
 }
-#endif

Sources/SwiftSyntaxParser/SyntaxParser.swift

@@ -142,6 +142,7 @@ public enum SyntaxParser {
     let arena = SyntaxArena()
     let sourceBuffer = source.withUTF8 { arena.internSourceBuffer($0) }
 
+#if compiler(>=5.7)
     if let languageVersion = languageVersion {
       languageVersion.withCString { languageVersionCString in
         swiftparse_parser_set_language_version(c_parser, languageVersionCString)
@@ -150,6 +151,7 @@ public enum SyntaxParser {
     if let enableBareSlashRegexLiteral = enableBareSlashRegexLiteral {
       swiftparse_parser_set_enable_bare_slash_regex_literal(c_parser, enableBareSlashRegexLiteral)
     }
+#endif
 
     let nodeHandler = { (cnode: CSyntaxNodePtr!) -> UnsafeMutableRawPointer in
       RawSyntax.getOpaqueFromCNode(cnode, in: sourceBuffer, arena: arena)
@@ -205,7 +207,9 @@ public enum SyntaxParser {
       swiftparse_parser_set_diagnostic_handler(c_parser, diagHandler)
     }
 
-    let c_top = swiftparse_parse_string(c_parser, sourceBuffer.baseAddress, sourceBuffer.count)
+    let c_top = sourceBuffer.withMemoryRebound(to: CChar.self) { sourceBuffer in
+      return swiftparse_parse_string(c_parser, sourceBuffer.baseAddress, sourceBuffer.count)
+    }
     let base = Syntax(raw: RawSyntax.fromOpaque(c_top!))
     guard let file = base.as(SourceFileSyntax.self) else {
       throw ParserError.invalidSyntaxData