$symbol accepts callable tables.

Author: ReFreezed

README.md

@@ -4,7 +4,7 @@
 	<a href="https://github.com/ReFreezed/LuaPreprocess/releases/latest">
 		<img src="https://img.shields.io/github/release/ReFreezed/LuaPreprocess.svg" alt="">
 	</a>
-	<a href="https://github.com/ReFreezed/LuaPreprocess/blob/master/LICENSE">
+	<a href="https://github.com/ReFreezed/LuaPreprocess/blob/master/LICENSE.txt">
 		<img src="https://img.shields.io/github/license/ReFreezed/LuaPreprocess.svg" alt="">
 	</a>
 </p>

preprocess.lua

@@ -1974,7 +1974,13 @@ function metaEnv.__MACRO()
 end
 
 function metaEnv.__EVALSYMBOL(v)
-	if type(v) == "function" then
+	if
+		type(v) == "function"
+		-- We use debug.getmetatable instead of _G.getmetatable because we
+		-- don't want to potentially invoke used code right here - we just
+		-- want to know if the value is callable.
+		or (type(v) == "table" and debug.getmetatable(v) and debug.getmetatable(v).__call)
+	then
 		v = v()
 	end
 	return v

tests/quickTest.lua2p

@@ -167,10 +167,19 @@ other      = 500921
 !local RANDOM = "math.random()"
 local rand    = $RANDOM
 
-!local function EQUATION()  return "x*3+y"  end
+!local EQUATION_FROM_FUNCTION = (function()
+	return "x*3+y"
+end)
+!local EQUATION_FROM_TABLE = setmetatable({}, {
+	__call = function()
+		return "z*-8"
+	end,
+})
 local x = 5
 local y = 89
-local z = $EQUATION
+local z = $EQUATION_FROM_FUNCTION
+local w = $EQUATION_FROM_TABLE
+print("w is "..w)
 
 
 

tests/quickTest.output.lua

@@ -118,6 +118,8 @@ local rand = math.random()
 local x = 5
 local y = 89
 local z = x*3+y
+local w = z*-8
+print("w is "..w)