const std = @import("std");

const zisp = @import("zisp");

const gstIo = std.Io.Threaded.global_single_threaded.io();

pub fn main() !void {
    var stdin_buffer: [4096]u8 = undefined;
    var stdin_reader = std.Io.File.stdin().reader(gstIo, &stdin_buffer);
    const reader = &stdin_reader.interface;

    var stdout_buffer: [4096]u8 = undefined;
    var stdout_writer = std.Io.File.stdout().writer(gstIo, &stdout_buffer);
    const writer = &stdout_writer.interface;

    while (true) {
        try writer.writeAll("> ");
        try writer.flush();
        const datum = zisp.io.parser.parse(reader);
        if (datum.eq(zisp.value.eof)) {
            try writer.writeAll("\n");
            return;
        }
        try writer.writeAll("= ");
        try zisp.io.unparser.unparse(writer, datum);
        try writer.writeAll("\n");
        try writer.flush();
    }
}