patch 7.4.1125

Problem:    There is no perleval().
Solution:   Add perleval(). (Damien)

src/testdir/test_perl.vim

@@ -0,0 +1,74 @@
+" Tests for Perl interface
+
+if !has('perl')
+  finish
+end
+
+set nocp viminfo+=nviminfo
+
+fu <SID>catch_peval(expr)
+  try
+    call perleval(a:expr)
+  catch
+    return v:exception
+  endtry
+  call assert_true(0, 'no exception for `perleval("'.a:expr.'")`')
+  return ''
+endf
+
+function Test_perleval()
+  call assert_false(perleval('undef'))
+
+  " scalar
+  call assert_equal(0, perleval('0'))
+  call assert_equal(2, perleval('2'))
+  call assert_equal(-2, perleval('-2'))
+  if has('float')
+    call assert_equal(2.5, perleval('2.5'))
+  else
+    call assert_equal(2, perleval('2.5'))
+  end
+
+  sandbox call assert_equal(2, perleval('2'))
+
+  call assert_equal('abc', perleval('"abc"'))
+  call assert_equal("abc\ndef", perleval('"abc\0def"'))
+
+  " ref
+  call assert_equal([], perleval('[]'))
+  call assert_equal(['word', 42, [42],{}], perleval('["word", 42, [42], {}]'))
+
+  call assert_equal({}, perleval('{}'))
+  call assert_equal({'foo': 'bar'}, perleval('{foo => "bar"}'))
+
+  perl our %h; our @a;
+  let a = perleval('[\(%h, %h, @a, @a)]')
+  call assert_true((a[0] is a[1]))
+  call assert_true((a[2] is a[3]))
+  perl undef %h; undef @a;
+
+  call assert_true(<SID>catch_peval('{"" , 0}') =~ 'Malformed key Dictionary')
+  call assert_true(<SID>catch_peval('{"\0" , 0}') =~ 'Malformed key Dictionary')
+  call assert_true(<SID>catch_peval('{"foo\0bar" , 0}') =~ 'Malformed key Dictionary')
+
+  call assert_equal('*VIM', perleval('"*VIM"'))
+  call assert_true(perleval('\\0') =~ 'SCALAR(0x\x\+)')
+endf
+
+function Test_perldo()
+  sp __TEST__
+  exe 'read ' g:testname
+  perldo s/perl/vieux_chameau/g
+  1
+  call assert_false(search('\Cperl'))
+  bw!
+endf
+
+function Test_VIM_package()
+  perl VIM::DoCommand('let l:var = "foo"')
+  call assert_equal(l:var, 'foo')
+
+  set noet
+  perl VIM::SetOption('et')
+  call assert_true(&et)
+endf