Fix _._ operator not working with arbitrary expressions

parser/common.lua

@@ -82,7 +82,7 @@ common = {
 	--- split a string separated by .
 	split = function(str)
 		local address = {}
-		for name in str:gmatch("[^%.]+") do
+		for name in (str.."."):gmatch("(.-)%.") do
 			table.insert(address, name)
 		end
 		return address
@@ -92,7 +92,8 @@ common = {
 	-- returns value, fqm in case of success
 	-- returns nil, err in case of error
 	find = function(aliases, list, namespace, name)
-		local ns = common.split(namespace)
+		if namespace ~= "" then
+			local ns = common.split(namespace:gsub("%.$", ""))
 			for i=#ns, 1, -1 do
 				local current_namespace = table.concat(ns, ".", 1, i)
 				local fqm = replace_aliases(aliases, current_namespace, name)
@@ -100,6 +101,7 @@ common = {
 					return list[fqm], fqm
 				end
 			end
+		end
 		-- root namespace
 		name = replace_aliases(aliases, "", name)
 		if list[name] then
@@ -111,7 +113,8 @@ common = {
 	-- returns a list of fqm
 	find_all = function(aliases, list, namespace, name)
 		local l = {}
-		local ns = common.split(namespace)
+		if namespace ~= "" then
+			local ns = common.split(namespace:gsub("%.$", ""))
 			for i=#ns, 1, -1 do
 				local current_namespace = table.concat(ns, ".", 1, i)
 				local fqm = replace_aliases(aliases, current_namespace, name)
@@ -119,6 +122,7 @@ common = {
 					table.insert(l, fqm)
 				end
 			end
+		end
 		-- root namespace
 		name = replace_aliases(aliases, "", name)
 		if list[name] then

test/tests/namespace operator arbitrary expression.ans

@@ -0,0 +1,6 @@
+:$ f
+	:x = 5
+
+:a = &f
+
+{a.("x")}

test/tests/namespace operator arbitrary expression.lua

@@ -0,0 +1,14 @@
+local _={}
+_[5]={}
+_[4]={text="5",tags=_[5]}
+_[3]={_[4]}
+_[2]={"return"}
+_[1]={"text",_[3]}
+return {_[1],_[2]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "5"
+    } } }
+{ "return" }
+]]--