Fix case-sensitive reserved word checks: use -cin instead of -in per Lua §3.1; add tests for capitalized identifiers (End, While)

Author: MariusStorhaug

src/functions/private/ConvertFrom-LuaTable.ps1

@@ -114,7 +114,7 @@
                 $varName = $script:luaString.Substring($identStart, $script:luaPos - $identStart)
 
                 # Lua grammar: variable names cannot be reserved words (§3.1)
-                if ($varName -in $reservedWords) {
+                if ($varName -cin $reservedWords) {
                     if ($script:luaSkipValidation) {
                         Write-Warning "Reserved word '$varName' used as a variable name at position $identStart."
                     } else {

src/functions/private/Read-LuaTable.ps1

@@ -87,7 +87,7 @@
                 if ($script:luaPos -lt $script:luaString.Length -and
                     $script:luaString[$script:luaPos] -eq '=') {
                     # Lua grammar: Name cannot be a reserved word (§3.1)
-                    if ($ident -in $reservedWords) {
+                    if ($ident -cin $reservedWords) {
                         if ($script:luaSkipValidation) {
                             Write-Warning "Reserved word '$ident' used as a bare identifier key at position $identStart."
                         } else {

tests/Lua.Tests.ps1

@@ -522,6 +522,17 @@ B = { val = 2 }
             $result['while'] | Should -Be 2
         }
 
+        It 'Allows capitalized reserved words as bare table keys (Lua keywords are case-sensitive)' {
+            $result = ConvertFrom-Lua -InputObject '{ End = 1, While = "loop" }' -AsHashtable
+            $result['End'] | Should -Be 1
+            $result['While'] | Should -Be 'loop'
+        }
+
+        It 'Allows capitalized reserved words as assignment variable names (Lua keywords are case-sensitive)' {
+            $result = ConvertFrom-Lua -InputObject 'End = 1' -AsHashtable
+            $result['End'] | Should -Be 1
+        }
+
         It 'Throws on reserved word as assignment variable name' {
             { ConvertFrom-Lua -InputObject 'end = 1' } | Should -Throw '*Reserved word*'
         }