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diff src/testdir/test_user_func.vim @ 16615:1a911bd57f11 v8.1.1310

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patch 8.1.1310: named function arguments are never optional commit https://github.com/vim/vim/commit/42ae78cfff171fbd7412306083fe200245d7a7a6 Author: Bram Moolenaar <Bram@vim.org> Date: Thu May 9 21:08:58 2019 +0200 patch 8.1.1310: named function arguments are never optional Problem: Named function arguments are never optional. Solution: Support optional function arguments with a default value. (Andy Massimino, closes #3952)
author Bram Moolenaar <Bram@vim.org>
date Thu, 09 May 2019 21:15:05 +0200
parents 15f0f9f16cd9
children 9ffec4eb8d33
line wrap: on
line diff
--- a/src/testdir/test_user_func.vim
+++ b/src/testdir/test_user_func.vim
@@ -94,3 +94,53 @@ func Test_user_func()
   unlet g:retval g:counter
   enew!
 endfunc
+
+func Log(val, base = 10)
+  return log(a:val) / log(a:base)
+endfunc
+
+func Args(mandatory, optional = v:null, ...)
+  return deepcopy(a:)
+endfunc
+
+func Args2(a = 1, b = 2, c = 3)
+  return deepcopy(a:)
+endfunc
+
+func MakeBadFunc()
+  func s:fcn(a, b=1, c)
+  endfunc
+endfunc
+
+func Test_default_arg()
+  call assert_equal(1.0, Log(10))
+  call assert_equal(log(10), Log(10, exp(1)))
+  call assert_fails("call Log(1,2,3)", 'E118')
+
+  let res = Args(1)
+  call assert_equal(res.mandatory, 1)
+  call assert_equal(res.optional, v:null)
+  call assert_equal(res['0'], 0)
+
+  let res = Args(1,2)
+  call assert_equal(res.mandatory, 1)
+  call assert_equal(res.optional, 2)
+  call assert_equal(res['0'], 0)
+
+  let res = Args(1,2,3)
+  call assert_equal(res.mandatory, 1)
+  call assert_equal(res.optional, 2)
+  call assert_equal(res['0'], 1)
+
+  call assert_fails("call MakeBadFunc()", 'E989')
+  call assert_fails("fu F(a=1 ,) | endf", 'E475')
+
+  let d = Args2(7, v:none, 9)
+  call assert_equal([7, 2, 9], [d.a, d.b, d.c])
+
+  call assert_equal("\n"
+	\ .. "   function Args2(a = 1, b = 2, c = 3)\n"
+	\ .. "1    return deepcopy(a:)\n"
+	\ .. "   endfunction",
+	\ execute('func Args2'))
+endfunc