fix: backward compatibility for lua 5.1

pgagnidze · Jul 31, 2023 · 454aaf1 · 454aaf1
1 parent bb57f11
commit 454aaf1
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Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/ena/helper/common.lua b/ena/helper/common.lua
@@ -1,3 +1,4 @@
+---@diagnostic disable: duplicate-set-field
 local common = {}
 local lpeg = require "lpeg"
 local literals = require "ena.lang.literals"
@@ -7,6 +8,14 @@ local V = lpeg.V
 
 common.endToken = V "endToken"
 
+if not table.pack then
+    function common.tablePack(...)
+        return { n = select('#', ...), ... }
+    end
+else
+    common.tablePack = table.pack
+end
+
 function common.I(tag)
     return P(
         function()

diff --git a/ena/parser.lua b/ena/parser.lua
@@ -152,7 +152,7 @@ local stringLiteral = doubleQuoteString + singleQuoteString
 
 -- abstract syntax tree --
 local function node(tag, ...)
-    local labels = table.pack(...)
+    local labels = common.tablePack(...)
     local params = table.concat(labels, ", ")
     local fields = string.gsub(params, "(%w+)", "%1 = %1")
     local code = string.format("return function (%s) return {tag = '%s', %s} end", params, tag, fields)