evaluating pattern matching

src/ast.ts

@@ -126,8 +126,18 @@ export function prettyPrint(ast: AST, indent = 0): string {
     const i = ' '.repeat(indent);
 
     switch (ast.kind) {
-        case 'literal':
-            return `${i}${ast.value}`;
+        case 'literal': {
+            const val = ast.value;
+            switch (val.kind) {
+                case 'int':
+                case 'float':
+                    return `${i}${val.value}`;
+                case 'string':
+                    return `${i}"${val.value}"`;
+                default:
+                    return `${i}${val.kind}`;
+            }
+        }
 
         case 'variable':
             return `${i}${ast.name}`;
@@ -171,7 +181,6 @@ export function prettyPrint(ast: AST, indent = 0): string {
                 .join('\n');
             return `${i}match ${expr}\n${cases}`;
 
-
         default:
             return `${i}${ast.kind}`
     }