tiny.zen.parseQuiz

1pub fn parse(storage: *storage_mod.Storage, source: []const u8) model.Error!model.Quiz {2    var regions = try storage.acquire(source);3    var iterator = scan.Iterator.init(source);4    var question_index: usize = 0;5    var option_index: usize = 0;6    var byte_index: usize = 0;7    var current: ?Current = null;89    while (iterator.next()) |token| switch (token) {10        .prompt => |text| {11            if (current) |active| active.finish(&regions, option_index);12            std.debug.assert(question_index < regions.questions.len);13            regions.questions[question_index] = .{14                .prompt = text,15                .options = &.{},16                .explanation = "",17            };18            current = .{19                .question = question_index,20                .option_start = option_index,21                .active = .{ .prompt = question_index },22            };23            question_index += 1;24        },25        .option => |option| {26            std.debug.assert(current != null);27            var active = &current.?;28            std.debug.assert(option_index < regions.options.len);29            regions.options[option_index] = .{30                .text = option.text,31                .correct = option.correct,32            };33            active.active = .{ .option = option_index };34            active.joined_start = null;35            option_index += 1;36        },37        .explanation => |text| {38            std.debug.assert(current != null);39            var active = &current.?;40            switch (active.active) {41                .explanation => active.join(&regions, &byte_index, text),42                else => {43                    regions.questions[active.question].explanation = text;44                    active.active = .{ .explanation = active.question };45                    active.joined_start = null;46                },47            }48        },49        .continuation => |text| {50            std.debug.assert(current != null);51            var active = &current.?;52            active.join(&regions, &byte_index, text);53        },54    };55    std.debug.assert(current != null);56    current.?.finish(&regions, option_index);57    std.debug.assert(question_index == regions.questions.len);58    std.debug.assert(option_index == regions.options.len);59    std.debug.assert(byte_index == regions.joined_text.len);60    return .{ .questions = regions.questions };61}

1/// Parses into active storage; the quiz borrows it until `reset`.2pub const parseQuiz = quiz.parse;