tests: Add missing test cases

1 files changed, 777 insertions, 420 deletions

diff --git a/test/functional/api/vim_spec.lua b/test/functional/api/vim_spec.lua
index bb7785657d..b904bd2a8f 100644
--- a/test/functional/api/vim_spec.lua
+++ b/test/functional/api/vim_spec.lua
@@ -12,8 +12,10 @@ local request = helpers.request
 local meth_pcall = helpers.meth_pcall
 local command = helpers.command
 
+local REMOVE_THIS = global_helpers.REMOVE_THIS
 local intchar2lua = global_helpers.intchar2lua
 local format_string = global_helpers.format_string
+local mergedicts_copy = global_helpers.mergedicts_copy
 
 describe('api', function()
   before_each(clear)
@@ -717,6 +719,9 @@ describe('api', function()
 
   describe('nvim_parse_expression', function()
     local function simplify_east_api_node(line, east_api_node)
+      if east_api_node == NIL then
+        return nil
+      end
       if east_api_node.children then
         for k, v in pairs(east_api_node.children) do
           east_api_node.children[k] = simplify_east_api_node(line, v)
@@ -806,31 +811,53 @@ describe('api', function()
       end
       return east_hl
     end
-    local function check_parsing(str, flags, exp_ast, exp_highlighting_fs)
-      if flags == 0 then
-        flags = ""
-      end
-
-      local err, msg = pcall(function()
-        local east_api = meths.parse_expression(str, flags, true)
-        local east_hl = east_api.highlight
-        east_api.highlight = nil
-        local ast = simplify_east_api(str, east_api)
-        local hls = simplify_east_hl(str, east_hl)
-        eq(exp_ast, ast)
-        if exp_highlighting_fs then
-          local exp_highlighting = {}
-          local next_col = 0
-          for i, h in ipairs(exp_highlighting_fs) do
-            exp_highlighting[i], next_col = h(next_col)
+    local FLAGS_TO_STR = {
+      [0] = "",
+      [1] = "m",
+      [2] = "E",
+      [3] = "mE",
+    }
+    local function check_parsing(str, exp_ast, exp_highlighting_fs,
+                                 nz_flags_exps)
+      nz_flags_exps = nz_flags_exps or {}
+      for _, flags in ipairs({0, 1, 2, 3}) do
+        local err, msg = pcall(function()
+          local east_api = meths.parse_expression(str, FLAGS_TO_STR[flags], true)
+          local east_hl = east_api.highlight
+          east_api.highlight = nil
+          local ast = simplify_east_api(str, east_api)
+          local hls = simplify_east_hl(str, east_hl)
+          local exps = {
+            ast = exp_ast,
+            hl_fs = exp_highlighting_fs,
+          }
+          local add_exps = nz_flags_exps[flags]
+          if not add_exps and flags == 3 then
+            add_exps = nz_flags_exps[1] or nz_flags_exps[2]
           end
-          eq(exp_highlighting, hls)
+          if add_exps then
+            if add_exps.ast then
+              exps.ast = mergedicts_copy(exps.ast, add_exps.ast)
+            end
+            if add_exps.hl_fs then
+              exps.hl_fs = mergedicts_copy(exps.hl_fs, add_exps.hl_fs)
+            end
+          end
+          eq(exps.ast, ast)
+          if exp_highlighting_fs then
+            local exp_highlighting = {}
+            local next_col = 0
+            for i, h in ipairs(exps.hl_fs) do
+              exp_highlighting[i], next_col = h(next_col)
+            end
+            eq(exp_highlighting, hls)
+          end
+        end)
+        if not err then
+          msg = format_string('Error while processing test (%r, %s):\n%s',
+                              str, FLAGS_TO_STR[flags], msg)
+          error(msg)
         end
-      end)
-      if not err then
-        msg = format_string('Error while processing test (%r, %s):\n%s',
-                            str, flags, msg)
-        error(msg)
       end
     end
     local function hl(group, str, shift)
@@ -844,14 +871,14 @@ describe('api', function()
       end
     end
     it('works with + and @a', function()
-      check_parsing('@a', 0, {
+      check_parsing('@a', {
         ast = {
           'Register(name=a):0:0:@a',
         },
       }, {
         hl('Register', '@a'),
       })
-      check_parsing('+@a', 0, {
+      check_parsing('+@a', {
         ast = {
           {
             'UnaryPlus:0:0:+',
@@ -864,7 +891,7 @@ describe('api', function()
         hl('UnaryPlus', '+'),
         hl('Register', '@a'),
       })
-      check_parsing('@a+@b', 0, {
+      check_parsing('@a+@b', {
         ast = {
           {
             'BinaryPlus:0:2:+',
@@ -879,7 +906,7 @@ describe('api', function()
         hl('BinaryPlus', '+'),
         hl('Register', '@b'),
       })
-      check_parsing('@a+@b+@c', 0, {
+      check_parsing('@a+@b+@c', {
         ast = {
           {
             'BinaryPlus:0:5:+',
@@ -902,7 +929,7 @@ describe('api', function()
         hl('BinaryPlus', '+'),
         hl('Register', '@c'),
       })
-      check_parsing('+@a+@b', 0, {
+      check_parsing('+@a+@b', {
         ast = {
           {
             'BinaryPlus:0:3:+',
@@ -923,7 +950,7 @@ describe('api', function()
         hl('BinaryPlus', '+'),
         hl('Register', '@b'),
       })
-      check_parsing('+@a++@b', 0, {
+      check_parsing('+@a++@b', {
         ast = {
           {
             'BinaryPlus:0:3:+',
@@ -950,7 +977,7 @@ describe('api', function()
         hl('UnaryPlus', '+'),
         hl('Register', '@b'),
       })
-      check_parsing('@a@b', 0, {
+      check_parsing('@a@b', {
         ast = {
           {
             'OpMissing:0:2:',
@@ -967,8 +994,20 @@ describe('api', function()
       }, {
         hl('Register', '@a'),
         hl('InvalidRegister', '@b'),
+      }, {
+        [1] = {
+          ast = {
+            err = REMOVE_THIS,
+            ast = {
+              'Register(name=a):0:0:@a'
+            },
+          },
+          hl_fs = {
+            [2] = REMOVE_THIS,
+          },
+        },
       })
-      check_parsing(' @a \t @b', 0, {
+      check_parsing(' @a \t @b', {
         ast = {
           {
             'OpMissing:0:3:',
@@ -986,8 +1025,21 @@ describe('api', function()
         hl('Register', '@a', 1),
         hl('InvalidSpacing', ' \t '),
         hl('Register', '@b'),
+      }, {
+        [1] = {
+          ast = {
+            err = REMOVE_THIS,
+            ast = {
+              'Register(name=a):0:0: @a'
+            },
+          },
+          hl_fs = {
+            [2] = REMOVE_THIS,
+            [3] = REMOVE_THIS,
+          },
+        },
       })
-      check_parsing('+', 0, {
+      check_parsing('+', {
         ast = {
           'UnaryPlus:0:0:+',
         },
@@ -998,7 +1050,7 @@ describe('api', function()
       }, {
         hl('UnaryPlus', '+'),
       })
-      check_parsing(' +', 0, {
+      check_parsing(' +', {
         ast = {
           'UnaryPlus:0:0: +',
         },
@@ -1009,7 +1061,7 @@ describe('api', function()
       }, {
         hl('UnaryPlus', '+', 1),
       })
-      check_parsing('@a+  ', 0, {
+      check_parsing('@a+  ', {
         ast = {
           {
             'BinaryPlus:0:2:+',
@@ -1028,7 +1080,7 @@ describe('api', function()
       })
     end)
     it('works with @a, + and parenthesis', function()
-      check_parsing('(@a)', 0, {
+      check_parsing('(@a)', {
         ast = {
           {
             'Nested:0:0:(',
@@ -1042,7 +1094,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('NestingParenthesis', ')'),
       })
-      check_parsing('()', 0, {
+      check_parsing('()', {
         ast = {
           {
             'Nested:0:0:(',
@@ -1059,7 +1111,7 @@ describe('api', function()
         hl('NestingParenthesis', '('),
         hl('InvalidNestingParenthesis', ')'),
       })
-      check_parsing(')', 0, {
+      check_parsing(')', {
         ast = {
           {
             'Nested:0:0:',
@@ -1075,7 +1127,7 @@ describe('api', function()
       }, {
         hl('InvalidNestingParenthesis', ')'),
       })
-      check_parsing('+)', 0, {
+      check_parsing('+)', {
         ast = {
           {
             'Nested:0:1:',
@@ -1097,7 +1149,7 @@ describe('api', function()
         hl('UnaryPlus', '+'),
         hl('InvalidNestingParenthesis', ')'),
       })
-      check_parsing('+@a(@b)', 0, {
+      check_parsing('+@a(@b)', {
         ast = {
           {
             'UnaryPlus:0:0:+',
@@ -1119,7 +1171,7 @@ describe('api', function()
         hl('Register', '@b'),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a+@b(@c)', 0, {
+      check_parsing('@a+@b(@c)', {
         ast = {
           {
             'BinaryPlus:0:2:+',
@@ -1143,7 +1195,7 @@ describe('api', function()
         hl('Register', '@c'),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a()', 0, {
+      check_parsing('@a()', {
         ast = {
           {
             'Call:0:2:(',
@@ -1157,7 +1209,7 @@ describe('api', function()
         hl('CallingParenthesis', '('),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a ()', 0, {
+      check_parsing('@a ()', {
         ast = {
           {
             'OpMissing:0:2:',
@@ -1181,91 +1233,102 @@ describe('api', function()
         hl('InvalidSpacing', ' '),
         hl('NestingParenthesis', '('),
         hl('InvalidNestingParenthesis', ')'),
-      })
-      check_parsing(
-        '@a + (@b)', 0, {
+      }, {
+        [1] = {
           ast = {
-            {
-              'BinaryPlus:0:2: +',
-              children = {
-                'Register(name=a):0:0:@a',
-                {
-                  'Nested:0:4: (',
-                  children = {
-                    'Register(name=b):0:6:@b',
-                  },
+            err = REMOVE_THIS,
+            ast = {
+              'Register(name=a):0:0:@a',
+            },
+          },
+          hl_fs = {
+            [2] = REMOVE_THIS,
+            [3] = REMOVE_THIS,
+            [4] = REMOVE_THIS,
+          },
+        },
+      })
+      check_parsing('@a + (@b)', {
+        ast = {
+          {
+            'BinaryPlus:0:2: +',
+            children = {
+              'Register(name=a):0:0:@a',
+              {
+                'Nested:0:4: (',
+                children = {
+                  'Register(name=b):0:6:@b',
                 },
               },
             },
           },
-        }, {
-          hl('Register', '@a'),
-          hl('BinaryPlus', '+', 1),
-          hl('NestingParenthesis', '(', 1),
-          hl('Register', '@b'),
-          hl('NestingParenthesis', ')'),
-        })
-      check_parsing(
-        '@a + (+@b)', 0, {
-          ast = {
-            {
-              'BinaryPlus:0:2: +',
-              children = {
-                'Register(name=a):0:0:@a',
-                {
-                  'Nested:0:4: (',
-                  children = {
-                    {
-                      'UnaryPlus:0:6:+',
-                      children = {
-                        'Register(name=b):0:7:@b',
-                      },
+        },
+      }, {
+        hl('Register', '@a'),
+        hl('BinaryPlus', '+', 1),
+        hl('NestingParenthesis', '(', 1),
+        hl('Register', '@b'),
+        hl('NestingParenthesis', ')'),
+      })
+      check_parsing('@a + (+@b)', {
+        ast = {
+          {
+            'BinaryPlus:0:2: +',
+            children = {
+              'Register(name=a):0:0:@a',
+              {
+                'Nested:0:4: (',
+                children = {
+                  {
+                    'UnaryPlus:0:6:+',
+                    children = {
+                      'Register(name=b):0:7:@b',
                     },
                   },
                 },
               },
             },
           },
-        }, {
-          hl('Register', '@a'),
-          hl('BinaryPlus', '+', 1),
-          hl('NestingParenthesis', '(', 1),
-          hl('UnaryPlus', '+'),
-          hl('Register', '@b'),
-          hl('NestingParenthesis', ')'),
-        })
-      check_parsing(
-        '@a + (@b + @c)', 0, {
-          ast = {
-            {
-              'BinaryPlus:0:2: +',
-              children = {
-                'Register(name=a):0:0:@a',
-                {
-                  'Nested:0:4: (',
-                  children = {
-                    {
-                      'BinaryPlus:0:8: +',
-                      children = {
-                        'Register(name=b):0:6:@b',
-                        'Register(name=c):0:10: @c',
-                      },
+        },
+      }, {
+        hl('Register', '@a'),
+        hl('BinaryPlus', '+', 1),
+        hl('NestingParenthesis', '(', 1),
+        hl('UnaryPlus', '+'),
+        hl('Register', '@b'),
+        hl('NestingParenthesis', ')'),
+      })
+      check_parsing('@a + (@b + @c)', {
+        ast = {
+          {
+            'BinaryPlus:0:2: +',
+            children = {
+              'Register(name=a):0:0:@a',
+              {
+                'Nested:0:4: (',
+                children = {
+                  {
+                    'BinaryPlus:0:8: +',
+                    children = {
+                      'Register(name=b):0:6:@b',
+                      'Register(name=c):0:10: @c',
                     },
                   },
                 },
               },
             },
           },
-        }, {
-          hl('Register', '@a'),
-          hl('BinaryPlus', '+', 1),
-          hl('NestingParenthesis', '(', 1),
-          hl('Register', '@b'),
-          hl('BinaryPlus', '+', 1),
-          hl('Register', '@c', 1),
-          hl('NestingParenthesis', ')'),
-        })
-      check_parsing('(@a)+@b', 0, {
+        },
+      }, {
+        hl('Register', '@a'),
+        hl('BinaryPlus', '+', 1),
+        hl('NestingParenthesis', '(', 1),
+        hl('Register', '@b'),
+        hl('BinaryPlus', '+', 1),
+        hl('Register', '@c', 1),
+        hl('NestingParenthesis', ')'),
+      })
+      check_parsing('(@a)+@b', {
         ast = {
           {
             'BinaryPlus:0:4:+',
@@ -1287,7 +1350,7 @@ describe('api', function()
         hl('BinaryPlus', '+'),
         hl('Register', '@b'),
       })
-      check_parsing('@a+(@b)(@c)', 0, {
+      check_parsing('@a+(@b)(@c)', {
         --           01234567890
         ast = {
           {
@@ -1317,7 +1380,7 @@ describe('api', function()
         hl('Register', '@c'),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a+((@b))(@c)', 0, {
+      check_parsing('@a+((@b))(@c)', {
         --           01234567890123456890123456789
         --           0         1        2
         ast = {
@@ -1355,7 +1418,7 @@ describe('api', function()
         hl('Register', '@c'),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a+((@b))+@c', 0, {
+      check_parsing('@a+((@b))+@c', {
         --           01234567890123456890123456789
         --           0         1        2
         ast = {
@@ -1393,7 +1456,7 @@ describe('api', function()
         hl('Register', '@c'),
       })
       check_parsing(
-        '@a + (@b + @c) + @d(@e) + (+@f) + ((+@g(@h))(@j)(@k))(@l)', 0, {--[[
+        '@a + (@b + @c) + @d(@e) + (+@f) + ((+@g(@h))(@j)(@k))(@l)', {--[[
          | | | | | |   | |  ||  | | ||  | | ||| ||   ||  ||   ||
          000000000011111111112222222222333333333344444444445555555
          012345678901234567890123456789012345678901234567890123456
@@ -1527,7 +1590,7 @@ describe('api', function()
           hl('Register', '@l'),
           hl('CallingParenthesis', ')'),
         })
-      check_parsing('@a)', 0, {
+      check_parsing('@a)', {
         --           012
         ast = {
           {
@@ -1545,7 +1608,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('InvalidNestingParenthesis', ')'),
       })
-      check_parsing('(@a', 0, {
+      check_parsing('(@a', {
         --           012
         ast = {
           {
@@ -1563,7 +1626,7 @@ describe('api', function()
         hl('NestingParenthesis', '('),
         hl('Register', '@a'),
       })
-      check_parsing('@a(@b', 0, {
+      check_parsing('@a(@b', {
         --           01234
         ast = {
           {
@@ -1583,7 +1646,7 @@ describe('api', function()
         hl('CallingParenthesis', '('),
         hl('Register', '@b'),
       })
-      check_parsing('@a(@b, @c, @d, @e)', 0, {
+      check_parsing('@a(@b, @c, @d, @e)', {
         --           012345678901234567
         --           0         1
         ast = {
@@ -1625,7 +1688,7 @@ describe('api', function()
         hl('Register', '@e', 1),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a(@b(@c))', 0, {
+      check_parsing('@a(@b(@c))', {
         --           01234567890123456789012345678901234567
         --           0         1         2         3
         ast = {
@@ -1652,7 +1715,7 @@ describe('api', function()
         hl('CallingParenthesis', ')'),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('@a(@b(@c(@d(@e), @f(@g(@h), @i(@j)))))', 0, {
+      check_parsing('@a(@b(@c(@d(@e), @f(@g(@h), @i(@j)))))', {
         --           01234567890123456789012345678901234567
         --           0         1         2         3
         ast = {
@@ -1742,14 +1805,14 @@ describe('api', function()
       })
     end)
     it('works with variable names, including curly braces ones', function()
-      check_parsing('var', 0, {
+      check_parsing('var', {
           ast = {
             'PlainIdentifier(scope=0,ident=var):0:0:var',
           },
       }, {
         hl('IdentifierName', 'var'),
       })
-      check_parsing('g:var', 0, {
+      check_parsing('g:var', {
           ast = {
             'PlainIdentifier(scope=g,ident=var):0:0:g:var',
           },
@@ -1758,7 +1821,7 @@ describe('api', function()
         hl('IdentifierScopeDelimiter', ':'),
         hl('IdentifierName', 'var'),
       })
-      check_parsing('g:', 0, {
+      check_parsing('g:', {
           ast = {
             'PlainIdentifier(scope=g,ident=):0:0:g:',
           },
@@ -1766,7 +1829,7 @@ describe('api', function()
         hl('IdentifierScope', 'g'),
         hl('IdentifierScopeDelimiter', ':'),
       })
-      check_parsing('{a}', 0, {
+      check_parsing('{a}', {
         --           012
         ast = {
           {
@@ -1781,7 +1844,7 @@ describe('api', function()
         hl('IdentifierName', 'a'),
         hl('Curly', '}'),
       })
-      check_parsing('{a:b}', 0, {
+      check_parsing('{a:b}', {
         --           012
         ast = {
           {
@@ -1798,7 +1861,7 @@ describe('api', function()
         hl('IdentifierName', 'b'),
         hl('Curly', '}'),
       })
-      check_parsing('{a:@b}', 0, {
+      check_parsing('{a:@b}', {
         --           012345
         ast = {
           {
@@ -1825,7 +1888,7 @@ describe('api', function()
         hl('InvalidRegister', '@b'),
         hl('Curly', '}'),
       })
-      check_parsing('{@a}', 0, {
+      check_parsing('{@a}', {
         ast = {
           {
             'CurlyBracesIdentifier:0:0:{',
@@ -1839,7 +1902,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Curly', '}'),
       })
-      check_parsing('{@a}{@b}', 0, {
+      check_parsing('{@a}{@b}', {
         --           01234567
         ast = {
           {
@@ -1868,7 +1931,7 @@ describe('api', function()
         hl('Register', '@b'),
         hl('Curly', '}'),
       })
-      check_parsing('g:{@a}', 0, {
+      check_parsing('g:{@a}', {
         --           01234567
         ast = {
           {
@@ -1891,7 +1954,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Curly', '}'),
       })
-      check_parsing('{@a}_test', 0, {
+      check_parsing('{@a}_test', {
         --           012345678
         ast = {
           {
@@ -1913,7 +1976,7 @@ describe('api', function()
         hl('Curly', '}'),
         hl('IdentifierName', '_test'),
       })
-      check_parsing('g:{@a}_test', 0, {
+      check_parsing('g:{@a}_test', {
         --           01234567890
         ast = {
           {
@@ -1943,7 +2006,7 @@ describe('api', function()
         hl('Curly', '}'),
         hl('IdentifierName', '_test'),
       })
-      check_parsing('g:{@a}_test()', 0, {
+      check_parsing('g:{@a}_test()', {
         --           0123456789012
         ast = {
           {
@@ -1980,7 +2043,7 @@ describe('api', function()
         hl('CallingParenthesis', '('),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('{@a} ()', 0, {
+      check_parsing('{@a} ()', {
         --           0123456789012
         ast = {
           {
@@ -2002,7 +2065,7 @@ describe('api', function()
         hl('CallingParenthesis', '(', 1),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('g:{@a} ()', 0, {
+      check_parsing('g:{@a} ()', {
         --           0123456789012
         ast = {
           {
@@ -2032,7 +2095,7 @@ describe('api', function()
         hl('CallingParenthesis', '(', 1),
         hl('CallingParenthesis', ')'),
       })
-      check_parsing('{@a', 0, {
+      check_parsing('{@a', {
         --           012
         ast = {
           {
@@ -2052,7 +2115,7 @@ describe('api', function()
       })
     end)
     it('works with lambdas and dictionaries', function()
-      check_parsing('{}', 0, {
+      check_parsing('{}', {
         ast = {
           'DictLiteral:0:0:{',
         },
@@ -2060,7 +2123,7 @@ describe('api', function()
         hl('Dict', '{'),
         hl('Dict', '}'),
       })
-      check_parsing('{->@a}', 0, {
+      check_parsing('{->@a}', {
         ast = {
           {
             'Lambda:0:0:{',
@@ -2080,7 +2143,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{->@a+@b}', 0, {
+      check_parsing('{->@a+@b}', {
         --           012345678
         ast = {
           {
@@ -2109,7 +2172,7 @@ describe('api', function()
         hl('Register', '@b'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a->@a}', 0, {
+      check_parsing('{a->@a}', {
         --           012345678
         ast = {
           {
@@ -2132,7 +2195,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b->@a}', 0, {
+      check_parsing('{a,b->@a}', {
         --           012345678
         ast = {
           {
@@ -2163,7 +2226,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b,c->@a}', 0, {
+      check_parsing('{a,b,c->@a}', {
         --           01234567890
         ast = {
           {
@@ -2202,7 +2265,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b,c,d->@a}', 0, {
+      check_parsing('{a,b,c,d->@a}', {
         --           0123456789012
         ast = {
           {
@@ -2249,7 +2312,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b,c,d,->@a}', 0, {
+      check_parsing('{a,b,c,d,->@a}', {
         --           01234567890123
         ast = {
           {
@@ -2302,7 +2365,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b->{c,d->{e,f->@a}}}', 0, {
+      check_parsing('{a,b->{c,d->{e,f->@a}}}', {
         --           01234567890123456789012
         --           0         1         2
         ast = {
@@ -2380,7 +2443,7 @@ describe('api', function()
         hl('Lambda', '}'),
         hl('Lambda', '}'),
       })
-      check_parsing('{a,b->c,d}', 0, {
+      check_parsing('{a,b->c,d}', {
         --           0123456789
         ast = {
           {
@@ -2423,7 +2486,7 @@ describe('api', function()
         hl('IdentifierName', 'd'),
         hl('Lambda', '}'),
       })
-      check_parsing('a,b,c,d', 0, {
+      check_parsing('a,b,c,d', {
         --           0123456789
         ast = {
           {
@@ -2459,7 +2522,7 @@ describe('api', function()
         hl('InvalidComma', ','),
         hl('IdentifierName', 'd'),
       })
-      check_parsing('a,b,c,d,', 0, {
+      check_parsing('a,b,c,d,', {
         --           0123456789
         ast = {
           {
@@ -2501,7 +2564,7 @@ describe('api', function()
         hl('IdentifierName', 'd'),
         hl('InvalidComma', ','),
       })
-      check_parsing(',', 0, {
+      check_parsing(',', {
         --           0123456789
         ast = {
           {
@@ -2518,7 +2581,7 @@ describe('api', function()
       }, {
         hl('InvalidComma', ','),
       })
-      check_parsing('{,a->@a}', 0, {
+      check_parsing('{,a->@a}', {
         --           0123456789
         ast = {
           {
@@ -2552,7 +2615,7 @@ describe('api', function()
         hl('Register', '@a'),
         hl('Curly', '}'),
       })
-      check_parsing('}', 0, {
+      check_parsing('}', {
         --           0123456789
         ast = {
           'UnknownFigure:0:0:',
@@ -2564,7 +2627,7 @@ describe('api', function()
       }, {
         hl('InvalidFigureBrace', '}'),
       })
-      check_parsing('{->}', 0, {
+      check_parsing('{->}', {
         --           0123456789
         ast = {
           {
@@ -2583,7 +2646,7 @@ describe('api', function()
         hl('Arrow', '->'),
         hl('InvalidLambda', '}'),
       })
-      check_parsing('{a,b}', 0, {
+      check_parsing('{a,b}', {
         --           0123456789
         ast = {
           {
@@ -2610,7 +2673,7 @@ describe('api', function()
         hl('IdentifierName', 'b'),
         hl('InvalidLambda', '}'),
       })
-      check_parsing('{a,}', 0, {
+      check_parsing('{a,}', {
         --           0123456789
         ast = {
           {
@@ -2635,7 +2698,7 @@ describe('api', function()
         hl('Comma', ','),
         hl('InvalidLambda', '}'),
       })
-      check_parsing('{@a:@b}', 0, {
+      check_parsing('{@a:@b}', {
         --           0123456789
         ast = {
           {
@@ -2658,7 +2721,7 @@ describe('api', function()
         hl('Register', '@b'),
         hl('Dict', '}'),
       })
-      check_parsing('{@a:@b,@c:@d}', 0, {
+      check_parsing('{@a:@b,@c:@d}', {
         --           0123456789012
         --           0         1
         ast = {
@@ -2698,7 +2761,7 @@ describe('api', function()
         hl('Register', '@d'),
         hl('Dict', '}'),
       })
-      check_parsing('{@a:@b,@c:@d,@e:@f,}', 0, {
+      check_parsing('{@a:@b,@c:@d,@e:@f,}', {
         --           01234567890123456789
         --           0         1
         ast = {
@@ -2760,7 +2823,7 @@ describe('api', function()
         hl('Comma', ','),
         hl('Dict', '}'),
       })
-      check_parsing('{@a:@b,@c:@d,@e:@f,@g:}', 0, {
+      check_parsing('{@a:@b,@c:@d,@e:@f,@g:}', {
         --           01234567890123456789012
         --           0         1         2
         ast = {
@@ -2834,7 +2897,7 @@ describe('api', function()
         hl('Colon', ':'),
         hl('InvalidDict', '}'),
       })
-      check_parsing('{@a:@b,}', 0, {
+      check_parsing('{@a:@b,}', {
         --           01234567890123
         --           0         1
         ast = {
@@ -2864,7 +2927,7 @@ describe('api', function()
         hl('Comma', ','),
         hl('Dict', '}'),
       })
-      check_parsing('{({f -> g})(@h)(@i)}', 0, {
+      check_parsing('{({f -> g})(@h)(@i)}', {
         --           01234567890123456789
         --           0         1
         ast = {
@@ -2920,7 +2983,7 @@ describe('api', function()
         hl('CallingParenthesis', ')'),
         hl('Curly', '}'),
       })
-      check_parsing('a:{b()}c', 0, {
+      check_parsing('a:{b()}c', {
         --           01234567
         ast = {
           {
@@ -2957,7 +3020,7 @@ describe('api', function()
         hl('Curly', '}'),
         hl('IdentifierName', 'c'),
       })
-      check_parsing('a:{{b, c -> @d + @e + ({f -> g})(@h)}(@i)}j', 0, {
+      check_parsing('a:{{b, c -> @d + @e + ({f -> g})(@h)}(@i)}j', {
         --           01234567890123456789012345678901234567890123456
         --           0         1         2         3         4
         ast = {
@@ -3067,7 +3130,7 @@ describe('api', function()
         hl('Curly', '}'),
         hl('IdentifierName', 'j'),
       })
-      check_parsing('{@a + @b : @c + @d, @e + @f : @g + @i}', 0, {
+      check_parsing('{@a + @b : @c + @d, @e + @f : @g + @i}', {
         --           01234567890123456789012345678901234567
         --           0         1         2         3
         ast = {
@@ -3139,7 +3202,7 @@ describe('api', function()
         hl('Register', '@i', 1),
         hl('Dict', '}'),
       })
-      check_parsing('-> -> ->', 0, {
+      check_parsing('-> -> ->', {
         --           01234567
         ast = {
           {
@@ -3170,7 +3233,7 @@ describe('api', function()
         hl('InvalidArrow', '->', 1),
         hl('InvalidArrow', '->', 1),
       })
-      check_parsing('a -> b -> c -> d', 0, {
+      check_parsing('a -> b -> c -> d', {
         --           0123456789012345
         --           0         1
         ast = {
@@ -3207,7 +3270,7 @@ describe('api', function()
         hl('InvalidArrow', '->', 1),
         hl('IdentifierName', 'd', 1),
       })
-      check_parsing('{a -> b -> c}', 0, {
+      check_parsing('{a -> b -> c}', {
         --           0123456789012
         --           0         1
         ast = {
@@ -3243,7 +3306,7 @@ describe('api', function()
         hl('IdentifierName', 'c', 1),
         hl('Lambda', '}'),
       })
-      check_parsing('{a: -> b}', 0, {
+      check_parsing('{a: -> b}', {
         --           012345678
         ast = {
           {
@@ -3272,7 +3335,7 @@ describe('api', function()
         hl('Curly', '}'),
       })
 
-      check_parsing('{a:b -> b}', 0, {
+      check_parsing('{a:b -> b}', {
         --           0123456789
         ast = {
           {
@@ -3302,7 +3365,7 @@ describe('api', function()
         hl('Curly', '}'),
       })
 
-      check_parsing('{a#b -> b}', 0, {
+      check_parsing('{a#b -> b}', {
         --           0123456789
         ast = {
           {
@@ -3329,7 +3392,7 @@ describe('api', function()
         hl('IdentifierName', 'b', 1),
         hl('Curly', '}'),
       })
-      check_parsing('{a : b : c}', 0, {
+      check_parsing('{a : b : c}', {
         --           01234567890
         --           0         1
         ast = {
@@ -3365,7 +3428,7 @@ describe('api', function()
         hl('IdentifierName', 'c', 1),
         hl('Dict', '}'),
       })
-      check_parsing('{', 0, {
+      check_parsing('{', {
         --           0
         ast = {
           'UnknownFigure:0:0:{',
@@ -3377,7 +3440,7 @@ describe('api', function()
       }, {
         hl('FigureBrace', '{'),
       })
-      check_parsing('{a', 0, {
+      check_parsing('{a', {
         --           01
         ast = {
           {
@@ -3395,7 +3458,7 @@ describe('api', function()
         hl('FigureBrace', '{'),
         hl('IdentifierName', 'a'),
       })
-      check_parsing('{a,b', 0, {
+      check_parsing('{a,b', {
         --           0123
         ast = {
           {
@@ -3421,7 +3484,7 @@ describe('api', function()
         hl('Comma', ','),
         hl('IdentifierName', 'b'),
       })
-      check_parsing('{a,b->', 0, {
+      check_parsing('{a,b->', {
         --           012345
         ast = {
           {
@@ -3449,7 +3512,7 @@ describe('api', function()
         hl('IdentifierName', 'b'),
         hl('Arrow', '->'),
       })
-      check_parsing('{a,b->c', 0, {
+      check_parsing('{a,b->c', {
         --           0123456
         ast = {
           {
@@ -3483,7 +3546,7 @@ describe('api', function()
         hl('Arrow', '->'),
         hl('IdentifierName', 'c'),
       })
-      check_parsing('{a : b', 0, {
+      check_parsing('{a : b', {
         --           012345
         ast = {
           {
@@ -3509,7 +3572,7 @@ describe('api', function()
         hl('Colon', ':', 1),
         hl('IdentifierName', 'b', 1),
       })
-      check_parsing('{a : b,', 0, {
+      check_parsing('{a : b,', {
         --           0123456
         ast = {
           {
@@ -3543,7 +3606,7 @@ describe('api', function()
       })
     end)
     it('works with ternary operator', function()
-      check_parsing('a ? b : c', 0, {
+      check_parsing('a ? b : c', {
         --           012345678
         ast = {
           {
@@ -3567,7 +3630,7 @@ describe('api', function()
         hl('TernaryColon', ':', 1),
         hl('IdentifierName', 'c', 1),
       })
-      check_parsing('@a?@b?@c:@d:@e', 0, {
+      check_parsing('@a?@b?@c:@d:@e', {
         --           01234567890123
         --           0         1
         ast = {
@@ -3608,7 +3671,7 @@ describe('api', function()
         hl('TernaryColon', ':'),
         hl('Register', '@e'),
       })
-      check_parsing('@a?@b:@c?@d:@e', 0, {
+      check_parsing('@a?@b:@c?@d:@e', {
         --           01234567890123