Support bool output

Author: Andrew Hart

src/Yaml.zig

@@ -537,6 +537,10 @@ pub const Value = union(enum) {
             .float,
             => return Value{ .scalar = try std.fmt.allocPrint(arena, "{d}", .{input}) },
 
+            // TODO - Support per-field option to use yes/no or on/off instead of true/false
+            .bool,
+            => return Value{ .scalar = try std.fmt.allocPrint(arena, "{}", .{input}) },
+
             .@"struct" => |info| if (info.is_tuple) {
                 var list: std.ArrayListUnmanaged(Value) = .empty;
                 try list.ensureTotalCapacityPrecise(arena, info.fields.len);

src/Yaml/test.zig

@@ -113,6 +113,31 @@ test "several integer bases" {
     try testing.expectEqualSlices(i8, &[_]i8{ 10, -10, 16, -16, 8, -8 }, &arr);
 }
 
+test "bools" {
+    const source =
+        \\- false
+        \\- true
+        \\- off
+        \\- on
+        \\- no
+        \\- yes
+        \\- n
+        \\- y
+    ;
+
+    var yaml: Yaml = .{ .source = source };
+    defer yaml.deinit(testing.allocator);
+    try yaml.load(testing.allocator);
+
+    try testing.expectEqual(yaml.docs.items.len, 1);
+
+    var arena = Arena.init(testing.allocator);
+    defer arena.deinit();
+
+    const arr = try yaml.parse(arena.allocator(), [8]bool);
+    try testing.expectEqualSlices(bool, &[_]bool{ false, true, false, true, false, true, false, true, }, &arr);
+}
+
 const TestEnum = enum {
     alpha,
     bravo,
@@ -687,6 +712,11 @@ test "stringify a list" {
     try testStringify("[ 1, 2, 3 ]", arr);
 }
 
+test "stringify a bool" {
+    try testStringify("false", false);
+    try testStringify("true", true);
+}
+
 test "stringify an enum" {
     try testStringify("alpha", TestEnum.alpha);
     try testStringify("bravo", TestEnum.bravo);