some stuff

src/ast.ts

@@ -0,0 +1,33 @@
+import { Span } from "./error";
+
+export type ItemKind = {
+    kind: "function",
+    node: FunctionDef,
+};
+
+export type Item = ItemKind & {
+    span: Span,
+}
+
+export type FunctionDef = {
+    name: string,
+    args: FunctionArg[], 
+    body: Expr,
+}
+
+export type FunctionArg = {
+    name: string,
+    span: Span,
+}
+
+export type ExprKind = {
+    kind: "lit_string",
+    value: string,
+} | {
+    kind: "ident",
+    value: string,
+}
+
+export type Expr = ExprKind & {
+    span: Span,
+}