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1 files changed, 65 insertions, 0 deletions

diff --git a/server-beta/src/core/reference.lua b/server-beta/src/core/reference.lua
new file mode 100644
index 00000000..96d1b635
--- /dev/null
+++ b/server-beta/src/core/reference.lua
@@ -0,0 +1,65 @@
+local guide     = require 'parser.guide'
+local workspace = require 'workspace'
+local files     = require 'files'
+local searcher  = require 'searcher'
+
+local function findDef(source, callback)
+    if  source.type ~= 'local'
+    and source.type ~= 'getlocal'
+    and source.type ~= 'setlocal'
+    and source.type ~= 'setglobal'
+    and source.type ~= 'getglobal'
+    and source.type ~= 'field'
+    and source.type ~= 'method'
+    and source.type ~= 'string'
+    and source.type ~= 'number'
+    and source.type ~= 'boolean'
+    and source.type ~= 'goto' then
+        return
+    end
+    searcher.eachRef(source, function (info)
+        if info.mode == 'declare'
+        or info.mode == 'set'
+        or info.mode == 'get'
+        or info.mode == 'return' then
+            local src  = info.source
+            local root = guide.getRoot(src)
+            local uri  = root.uri
+            if     src.type == 'setfield'
+            or     src.type == 'getfield'
+            or     src.type == 'tablefield' then
+                callback(src.field, uri)
+            elseif src.type == 'setindex'
+            or     src.type == 'getindex'
+            or     src.type == 'tableindex' then
+                callback(src.index, uri)
+            elseif src.type == 'getmethod'
+            or     src.type == 'setmethod' then
+                callback(src.method, uri)
+            else
+                callback(src, uri)
+            end
+        end
+    end)
+end
+
+return function (uri, offset)
+    local ast = files.getAst(uri)
+    if not ast then
+        return nil
+    end
+    local results = {}
+    guide.eachSourceContain(ast.ast, offset, function (source)
+        findDef(source, function (target, uri)
+            results[#results+1] = {
+                target = target,
+                uri    = files.getOriginUri(uri),
+                source = source,
+            }
+        end)
+    end)
+    if #results == 0 then
+        return nil
+    end
+    return results
+end