feat: ast structure and utilities

src/root.zig

@@ -1,15 +1,30 @@
 const std = @import("std");
 const tokenizer = @import("tokenizer.zig");
+pub const Ast = @import("Ast.zig");
 
 pub const Story = struct {
-    pub const LoadOptions = struct {};
+    pub const LoadOptions = struct {
+        stream_writer: *std.Io.Writer,
+        use_color: bool = true,
+    };
 
     pub fn loadFromString(
-        _: std.mem.Allocator,
+        gpa: std.mem.Allocator,
         source_bytes: [:0]const u8,
-        _: LoadOptions,
+        options: LoadOptions,
     ) !Story {
-        std.debug.print("{s}\n", .{source_bytes});
+        var ast = try Ast.parse(gpa, source_bytes, "<STDIN>", 0);
+        defer ast.deinit(gpa);
+
+        try ast.render(gpa, options.stream_writer, .{
+            .use_color = options.use_color,
+        });
+        if (ast.errors.len > 0) {
+            try ast.renderErrors(gpa, options.stream_writer, .{
+                .use_color = options.use_color,
+            });
+            return error.Invalid;
+        }
         return .{};
     }
     pub fn deinit(_: *Story) void {}