JSSpecCompiler: Parse true, false, this, undefined, and null

Author: https://github.com/DanShaders
Commit: b800276347
Pull-request: https://github.com/SerenityOS/serenity/pull/23123
Reviewed-by: https://github.com/ADKaster ✅

Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/AST/AST.h

@@ -134,6 +134,11 @@ protected:
 class WellKnownNode : public Expression {
 public:
     enum Type {
+        False,
+        Null,
+        This,
+        True,
+        Undefined,
         ZeroArgumentFunctionCall,
         // Update WellKnownNode::dump_tree after adding an entry here
     };

Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/AST/ASTPrinting.cpp

@@ -38,6 +38,11 @@ void ErrorNode::dump_tree(StringBuilder& builder)
 void WellKnownNode::dump_tree(StringBuilder& builder)
 {
     static constexpr StringView type_to_name[] = {
+        "False"sv,
+        "Null"sv,
+        "This"sv,
+        "True"sv,
+        "Undefined"sv,
         "ZeroArgumentFunctionCall"sv,
     };
     dump_node(builder, "WellKnownNode {}", type_to_name[m_type]);