fix #279 parser native supports negative number

changelog.md

@@ -4,6 +4,7 @@
 * `NEW` setting `runtime.unicodeName`
 * `NEW` fully supports `---@generic T`
 * `FIX` [#274](https://github.com/sumneko/lua-language-server/issues/274)
+* `FIX` [#279](https://github.com/sumneko/lua-language-server/issues/279)
 
 ## 1.4.0
 `2020-12-3`

script/parser/compile.lua

@@ -548,7 +548,9 @@ return function (self, lua, mode, version, options)
     LocalCount = 0
     Version = version
     Root = state.ast
-    Root.state = state
+    if Root then
+        Root.state = state
+    end
     Options = options
     state.ENVMode = ENVMode
     if type(state.ast) == 'table' then

script/parser/grammar.lua

@@ -258,7 +258,7 @@ StringClose <-  ']' =eq ']'
 ]]
 
 grammar 'Number' [[
-Number      <-  Sp ({} {NumberDef} {}) -> Number
+Number      <-  Sp ({} {'-'? NumberDef} {}) -> Number
                 NumberSuffix?
                 ErrNumber?
 NumberDef   <-  Number16 / Number10
@@ -534,6 +534,9 @@ return function (self, lua, mode)
         local err = errorpos(pos)
         return nil, err
     end
+    if type(r) ~= 'table' then
+        return nil
+    end
 
     return r
 end

script/parser/parse.lua

@@ -42,7 +42,7 @@ return function (self, lua, mode, version, options)
     if not suc then
         return nil, res
     end
-    if not res then
+    if not res and err then
         state.pushError(err)
     end
     state.ast = res

test/hover/init.lua

@@ -890,6 +890,21 @@ local t: {
 }
 ]]
 
+TEST [[
+local <?t?> = {
+    [-1] = -1,
+    [0]  = 0,
+    [1]  = 1,
+}
+]]
+[[
+local t: {
+    [-1]: integer = -1,
+    [0]: integer = 0,
+    [1]: integer = 1,
+}
+]]
+
 TEST[[
 ---@class Class
 local <?x?> = class()