all current tests passing

1 files changed, 14 insertions, 1 deletions

diff --git a/src/Lexer/Lexer.php b/src/Lexer/Lexer.php
index bb2a809..98ac5e2 100644
--- a/src/Lexer/Lexer.php
+++ b/src/Lexer/Lexer.php
@@ -27,7 +27,7 @@ class Lexer
             "(", ")",
             "[", "]",
             "{", "}",
-            "$", ".",
+            ".",
         ];
 
         $lastPosition = -1;
@@ -238,6 +238,18 @@ class Lexer
                 }
             }
 
+            // pipe placeholder
+            else if ($currentChar == "$") {
+                $output[] = new Token(
+                    TokenType::PipePlaceholder,
+                    $currentChar,
+                    $currentChar,
+                    $this->line,
+                    $startColumn,
+                );
+                $this->advance(1);
+            }
+
             // single char tokens
             else if (in_array($currentChar, $singleCharTokens)) {
                 $output[] = new Token(
@@ -489,5 +501,6 @@ enum TokenType {
     case Operator;
     case Assign;
     case Pipe;
+    case PipePlaceholder;
     case EndOfFile;
 }