Add undefined and null literal support

This adds the UndefinedLiteral and NullLiteral to AST.

Fixes #990

1 files changed, 8 insertions, 0 deletions

diff --git a/docs/compiler-api.md b/docs/compiler-api.md
index 40ded8f..c09414f 100644
--- a/docs/compiler-api.md
+++ b/docs/compiler-api.md
@@ -164,6 +164,14 @@ interface NumberLiteral <: Literal {
     value: number;
     original: number;
 }
+
+interface UndefinedLiteral <: Literal {
+    type: "UndefinedLiteral";
+}
+
+interface NullLiteral <: Literal {
+    type: "NullLiteral";
+}
 ```