1 files changed, 12 insertions, 0 deletions
diff --git a/llparse-builder/src/property.ts b/llparse-builder/src/property.ts
new file mode 100644
index 0000000..cf2fe4b
--- /dev/null
+++ b/llparse-builder/src/property.ts
@@ -0,0 +1,12 @@
+export type PropertyType = 'i8' | 'i16' | 'i32' | 'i64' | 'ptr';
+
+/**
+ * Class describing allocated property in parser's state
+ */
+export class Property {
+  constructor(public readonly ty: PropertyType, public readonly name: string) {
+    if (/^_/.test(name)) {
+      throw new Error(`Can't use internal property name: "${name}"`);
+    }
+  }
+}