fixes jashkenas#5427

STRd6 · Oct 14, 2022 · 2fd2a30 · 2fd2a30
1 parent 1dfa23b
commit 2fd2a30
Show file tree

Hide file tree

Showing 3 changed files with 3 additions and 2 deletions.
diff --git a/lib/coffeescript/nodes.js b/lib/coffeescript/nodes.js
diff --git a/src/nodes.coffee b/src/nodes.coffee
@@ -5772,7 +5772,7 @@ LEVEL_ACCESS = 6  # ...[0]
 # Tabs are two spaces for pretty printing.
 TAB = '  '
 
-SIMPLENUM = /^[+-]?\d+$/
+SIMPLENUM = /^[+-]?(?:\d(?:_?\d)*)+$/
 SIMPLE_STRING_OMIT = /\s*\n\s*/g
 LEADING_BLANK_LINE  = /^[^\n\S]*\n/
 TRAILING_BLANK_LINE = /\n[^\n\S]*$/

diff --git a/test/numbers.coffee b/test/numbers.coffee
@@ -21,6 +21,7 @@ test "Parser recognises binary numbers", ->
 test "call methods directly on numbers", ->
   eq 4, 4.valueOf()
   eq '11', 4.toString 3
+  eq '1000', 1_000.toString()
 
 eq -1, 3 -4