1 files changed, 3 insertions, 71 deletions

diff --git a/lib/repl.js b/lib/repl.js
index 92c90de7bb..4a01595ce1 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -73,6 +73,7 @@ const {
 } = require('internal/errors').codes;
 const { sendInspectorCommand } = require('internal/util/inspector');
 const { experimentalREPLAwait } = process.binding('config');
+const { isRecoverableError } = require('internal/repl/recoverable');
 
 // Lazy-loaded.
 let processTopLevelAwait;
@@ -227,7 +228,8 @@ function REPLServer(prompt,
       // It's confusing for `{ a : 1 }` to be interpreted as a block
       // statement rather than an object literal.  So, we first try
       // to wrap it in parentheses, so that it will be interpreted as
-      // an expression.
+      // an expression.  Note that if the above condition changes,
+      // lib/internal/repl/recoverable.js needs to be changed to match.
       code = `(${code.trim()})\n`;
       wrappedCmd = true;
     }
@@ -1505,76 +1507,6 @@ function regexpEscape(s) {
   return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
 }
 
-// If the error is that we've unexpectedly ended the input,
-// then let the user try to recover by adding more input.
-function isRecoverableError(e, code) {
-  if (e && e.name === 'SyntaxError') {
-    var message = e.message;
-    if (message === 'Unterminated template literal' ||
-        message === 'Unexpected end of input') {
-      return true;
-    }
-
-    if (message === 'missing ) after argument list') {
-      const frames = e.stack.split(/\r?\n/);
-      const pos = frames.findIndex((f) => f.match(/^\s*\^+$/));
-      return pos > 0 && frames[pos - 1].length === frames[pos].length;
-    }
-
-    if (message === 'Invalid or unexpected token')
-      return isCodeRecoverable(code);
-  }
-  return false;
-}
-
-// Check whether a code snippet should be forced to fail in the REPL.
-function isCodeRecoverable(code) {
-  var current, previous, stringLiteral;
-  var isBlockComment = false;
-  var isSingleComment = false;
-  var isRegExpLiteral = false;
-  var lastChar = code.charAt(code.length - 2);
-  var prevTokenChar = null;
-
-  for (var i = 0; i < code.length; i++) {
-    previous = current;
-    current = code[i];
-
-    if (previous === '\\' && (stringLiteral || isRegExpLiteral)) {
-      current = null;
-    } else if (stringLiteral) {
-      if (stringLiteral === current) {
-        stringLiteral = null;
-      }
-    } else if (isRegExpLiteral && current === '/') {
-      isRegExpLiteral = false;
-    } else if (isBlockComment && previous === '*' && current === '/') {
-      isBlockComment = false;
-    } else if (isSingleComment && current === '\n') {
-      isSingleComment = false;
-    } else if (!isBlockComment && !isRegExpLiteral && !isSingleComment) {
-      if (current === '/' && previous === '/') {
-        isSingleComment = true;
-      } else if (previous === '/') {
-        if (current === '*') {
-          isBlockComment = true;
-          // Distinguish between a division operator and the start of a regex
-          // by examining the non-whitespace character that precedes the /
-        } else if ([null, '(', '[', '{', '}', ';'].includes(prevTokenChar)) {
-          isRegExpLiteral = true;
-        }
-      } else {
-        if (current.trim()) prevTokenChar = current;
-        if (current === '\'' || current === '"') {
-          stringLiteral = current;
-        }
-      }
-    }
-  }
-
-  return stringLiteral ? lastChar === '\\' : isBlockComment;
-}
-
 function Recoverable(err) {
   this.err = err;
 }