feat(eval/method): partially port v8.1.1993

Problem:    More functions can be used as methods.
Solution:   Make various functions usable as a method.
196b466443

server2client requires +clientserver, which hasn't been ported yet.
The eval.txt docs and test_clientserver.vim tests for server2client already exist, so include those
changes.

test_bufline.vim: Test for setbufline requires v8.1.1189 (which was reverted in #10848).

src/nvim/eval.lua

@@ -291,29 +291,29 @@ return {
     rpcstart={args={1, 2}},
     rpcstop={args=1},
     rubyeval={args=1, base=1},
-    screenattr={args=2},
-    screenchar={args=2},
-    screenchars={args=2},
+    screenattr={args=2, base=1},
+    screenchar={args=2, base=1},
+    screenchars={args=2, base=1},
     screencol={},
-    screenpos={args=3},
+    screenpos={args=3, base=1},
     screenrow={},
-    screenstring={args=2},
-    search={args={1, 4}},
+    screenstring={args=2, base=1},
+    search={args={1, 4}, base=1},
     searchcount={args={0,1}},
-    searchdecl={args={1, 3}},
+    searchdecl={args={1, 3}, base=1},
     searchpair={args={3, 7}},
     searchpairpos={args={3, 7}},
-    searchpos={args={1, 4}},
+    searchpos={args={1, 4}, base=1},
     serverlist={},
     serverstart={args={0, 1}},
     serverstop={args=1},
-    setbufline={args=3},
-    setbufvar={args=3},
-    setcharsearch={args=1},
-    setcmdpos={args=1},
-    setenv={args=2},
+    setbufline={args=3, base=3},
+    setbufvar={args=3, base=3},
+    setcharsearch={args=1, base=1},
+    setcmdpos={args=1, base=1},
+    setenv={args=2, base=2},
     setfperm={args=2, base=1},
-    setline={args=2},
+    setline={args=2, base=2},
     setloclist={args={2, 4}},
     setmatches={args={1, 2}},
     setpos={args=2},

src/nvim/testdir/test_charsearch.vim

@@ -20,7 +20,7 @@ func Test_charsearch()
   " check that setcharsearch() changes the settings.
   3
   normal! ylfep
-  call setcharsearch({'char': 'k'})
+  eval {'char': 'k'}->setcharsearch()
   normal! ;p
   call setcharsearch({'forward': 0})
   normal! $;p

src/nvim/testdir/test_clientserver.vim

@@ -82,7 +82,7 @@ func Test_client_server()
   call remote_send(name, ":call server2client(expand('<client>'), 'got it')\<CR>", 'g:myserverid')
   call assert_equal('got it', g:myserverid->remote_read(2))
 
-  call remote_send(name, ":call server2client(expand('<client>'), 'another')\<CR>", 'g:myserverid')
+  call remote_send(name, ":eval expand('<client>')->server2client('another')\<CR>", 'g:myserverid')
   let peek_result = 'nothing'
   let r = g:myserverid->remote_peek('peek_result')
   " unpredictable whether the result is already available.

src/nvim/testdir/test_cmdline.vim

@@ -905,7 +905,7 @@ func Test_setcmdpos()
   call assert_equal('"12ab', @:)
 
   " setcmdpos() returns 1 when not editing the command line.
-  call assert_equal(1, setcmdpos(3))
+  call assert_equal(1, 3->setcmdpos())
 endfunc
 
 func Test_cmdline_overstrike()

src/nvim/testdir/test_cursor_func.vim

@@ -86,7 +86,7 @@ func Test_screenpos()
   call assert_equal({'row': winrow,
     \ 'col': wincol + 13,
     \ 'curscol': wincol + 13,
-    \ 'endcol': wincol + 13}, screenpos(winid, 1, 7))
+    \ 'endcol': wincol + 13}, winid->screenpos(1, 7))
   call assert_equal({'row': winrow + 2,
     \ 'col': wincol + 1,
     \ 'curscol': wincol + 1,

src/nvim/testdir/test_diffmode.vim

@@ -387,7 +387,7 @@ func Test_diffoff()
   call setline(1, ['One', '', 'Two', 'Three'])
   diffthis
   redraw
-  call assert_notequal(normattr, screenattr(1, 1))
+  call assert_notequal(normattr, 1->screenattr(1))
   diffoff!
   redraw
   call assert_equal(normattr, screenattr(1, 1))

src/nvim/testdir/test_environ.vim

@@ -22,7 +22,7 @@ endfunc
 
 func Test_setenv()
   unlet! $TESTENV
-  call setenv('TEST ENV', 'foo')
+  eval 'foo'->setenv('TEST ENV')
   call assert_equal('foo', getenv('TEST ENV'))
   call setenv('TEST ENV', v:null)
   call assert_equal(v:null, getenv('TEST ENV'))

src/nvim/testdir/test_functions.vim

@@ -346,7 +346,7 @@ func Test_setbufvar_options()
   wincmd h
   let wh = winheight(0)
   let dummy_buf = bufnr('dummy_buf2', v:true)
-  call setbufvar(dummy_buf, '&buftype', 'nofile')
+  eval 'nofile'->setbufvar(dummy_buf, '&buftype')
   execute 'belowright vertical split #' . dummy_buf
   call assert_equal(wh, winheight(0))
 
@@ -1330,7 +1330,7 @@ func Test_func_range_with_edit()
   " is invalid in that buffer.
   call writefile(['just one line'], 'Xfuncrange2')
   new
-  call setline(1, 10->range())
+  eval 10->range()->setline(1)
   write Xfuncrange1
   call assert_fails('5,8call EditAnotherFile()', 'E16:')
 

src/nvim/testdir/test_matchadd_conceal_utf8.vim

@@ -6,7 +6,7 @@ endif
 function! s:screenline(lnum) abort
   let line = []
   for c in range(1, winwidth(0))
-    call add(line, nr2char(screenchar(a:lnum, c)))
+    call add(line, nr2char(a:lnum->screenchar(c)))
   endfor
   return s:trim(join(line, ''))
 endfunction

src/nvim/testdir/test_search.vim

@@ -1315,7 +1315,7 @@ func Test_search_match_at_curpos()
 
   normal gg
 
-  call search('foobar', 'c')
+  eval 'foobar'->search('c')
   call assert_equal([1, 1], [line('.'), col('.')])
 
   normal j
@@ -1354,6 +1354,41 @@ func Test_search_display_pattern()
   endif
 endfunc
 
+func Test_searchdecl()
+  let lines =<< trim END
+     int global;
+
+     func()
+     {
+       int global;
+       if (cond) {
+	 int local;
+       }
+       int local;
+       // comment
+     }
+  END
+  new
+  call setline(1, lines)
+  10
+  call assert_equal(0, searchdecl('local', 0, 0))
+  call assert_equal(7, getcurpos()[1])
+
+  10
+  call assert_equal(0, 'local'->searchdecl(0, 1))
+  call assert_equal(9, getcurpos()[1])
+
+  10
+  call assert_equal(0, searchdecl('global'))
+  call assert_equal(5, getcurpos()[1])
+
+  10
+  call assert_equal(0, searchdecl('global', 1))
+  call assert_equal(1, getcurpos()[1])
+
+  bwipe!
+endfunc
+
 func Test_search_special()
   " this was causing illegal memory access and an endless loop
   set t_PE=

src/nvim/testdir/test_utf8.vim

@@ -69,7 +69,7 @@ func Test_screenchar_utf8()
   call setline(1, ["ABC\u0308"])
   redraw
   call assert_equal([0x0041], screenchars(1, 1))
-  call assert_equal([0x0042], screenchars(1, 2))
+  call assert_equal([0x0042], 1->screenchars(2))
   call assert_equal([0x0043, 0x0308], screenchars(1, 3))
   call assert_equal("A", screenstring(1, 1))
   call assert_equal("B", screenstring(1, 2))