completion: show words in string

Author: sumneko

changelog.md

@@ -5,6 +5,7 @@
 * `NEW` folding: `---@class` and docs of function
 * `CHG` supports `~` in command line
 * `CHG` completion: improve workspace words
+* `CHG` completion: show words in string
 * `FIX` [#339](https://github.com/sumneko/lua-language-server/issues/339)
 
 ## 1.9.0

script/core/completion.lua

@@ -1158,6 +1158,11 @@ local function tryWord(ast, text, offset, results)
     end
     local hasSpace = finish ~= offset
     if isInString(ast, offset) then
+        if not hasSpace then
+            if #results == 0 then
+                checkCommon(ast, word, text, offset, results)
+            end
+        end
     else
         local parent, oop = findParent(ast, text, start - 1)
         if parent then

test/completion/init.lua

@@ -905,7 +905,7 @@ local ast = 1
 local t = 'as$'
 local ask = 1
 ]]
-(nil)
+(EXISTS)
 
 TEST [[
 local add