First pass of parser complete.

src/main.zig

@@ -1,6 +1,8 @@
 const std = @import("std");
 
 const scanner = @import("scanner.zig");
+const expr = @import("expr.zig");
+const parser = @import("parser.zig");
 const err = @import("error.zig");
 
 pub fn main() !void {
@@ -56,8 +58,17 @@ fn runPrompt(alloc: std.mem.Allocator) !void {
 fn run(allocator: std.mem.Allocator, bytes: []u8) !void {
     var scan = scanner.Scanner.init(allocator, bytes);
     defer scan.deinit();
-    std.debug.print("{any}\n", .{scan.scanTokens()});
-}
 
-// Error reporting
-// TODO: Move to a separate file.
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+    var alloc = arena.allocator();
+    var parse = parser.Parser{
+        .tokens = scan.scanTokens(),
+        .allocator = alloc,
+    };
+
+    const expression = try parse.expression();
+    // std.debug.print("AST: {}", .{expression.*});
+    expr.AstPrint(expression.*);
+    std.debug.print("\n", .{});
+}