diff options
Diffstat (limited to 'exercises')
| -rw-r--r-- | exercises/065_builtins2.zig | 33 | ||||
| -rw-r--r-- | exercises/071_comptime6.zig | 9 | ||||
| -rw-r--r-- | exercises/082_anonymous_structs3.zig | 31 |
3 files changed, 27 insertions, 46 deletions
diff --git a/exercises/065_builtins2.zig b/exercises/065_builtins2.zig index eb8f3aa..78cd23b 100644 --- a/exercises/065_builtins2.zig +++ b/exercises/065_builtins2.zig @@ -93,36 +93,25 @@ pub fn main() void { print("He has room in his heart for:", .{}); - // A StructFields array - const fields = @typeInfo(Narcissus).@"struct".fields; + // `field_names` is a slice of strings and it holds the names of the struct's fields + // `field_types` is a slice of strings and it holds the types of the struct's fields, + // it is guaranteed to be the same length as `field_names` + const field_names = @typeInfo(Narcissus).@"struct".field_names; + const field_types = @typeInfo(Narcissus).@"struct".field_types; - // 'fields' is a slice of StructFields. Here's the declaration: - // - // pub const StructField = struct { - // name: [:0]const u8, // Don't worry about `:0` yet! - // type: type, - // default_value_ptr: ?*const anyopaque, - // is_comptime: bool, - // alignment: comptime_int, - // - // defaultValue() ?sf.type // Function that loads the - // // field's default value from - // // `default_value_ptr` - // }; - // // Please complete these 'if' statements so that the field // name will not be printed if the field is of type 'void' // (which is a zero-bit type that takes up no space at all!): - if (fields[0].??? != void) { - print(" {s}", .{fields[0].name}); + if (field_???[???] != void) { + print(" {s}", .{field_???[???]}); } - if (fields[1].??? != void) { - print(" {s}", .{fields[1].name}); + if (field_???[???] != void) { + print(" {s}", .{field_???[???]}); } - if (fields[2].??? != void) { - print(" {s}", .{fields[2].name}); + if (field_???[???] != void) { + print(" {s}", .{field_???[???]}); } // Yuck, look at all that repeated code above! I don't know diff --git a/exercises/071_comptime6.zig b/exercises/071_comptime6.zig index ce76607..3df9299 100644 --- a/exercises/071_comptime6.zig +++ b/exercises/071_comptime6.zig @@ -36,13 +36,14 @@ pub fn main() void { // statement was repeated three times almost verbatim. Yuck! // // Please use an 'inline for' to implement the block below - // for each field in the slice 'fields'! + // for each field in the corresponding slices (they're of the same length)! - const fields = @typeInfo(Narcissus).@"struct".fields; + const field_names = @typeInfo(Narcissus).@"struct".field_names; + const field_types = @typeInfo(Narcissus).@"struct".field_types; ??? { - if (field.type != void) { - print(" {s}", .{field.name}); + if (field_type != void) { + print(" {s}", .{field_name}); } } diff --git a/exercises/082_anonymous_structs3.zig b/exercises/082_anonymous_structs3.zig index c13774f..e99c826 100644 --- a/exercises/082_anonymous_structs3.zig +++ b/exercises/082_anonymous_structs3.zig @@ -74,36 +74,27 @@ fn printTuple(tuple: anytype) void { // @typeInfo() - takes a type, returns a TypeInfo union // with fields specific to that type. // - // The list of a struct type's fields can be found in - // TypeInfo's @"struct".fields. + // The list of a struct type's field types can be found in + // TypeInfo's @"struct".field_types. // // Example: // - // @typeInfo(Circle).@"struct".fields + // @typeInfo(Circle).@"struct".field_types // - // This will be an array of StructFields. - const fields = ???; + // This will be an array of field types. + const field_types = ???; + + // This will be an array of field names. + const field_names = ???; // 2. Loop through each field. This must be done at compile // time. // // Hint: remember 'inline' loops? // - for (fields) |field| { + for (???, ???) |???, ???| { // 3. Print the field's name, type, and value. // - // Each 'field' in this loop is one of these: - // - // pub const StructField = struct { - // name: [:0]const u8, - // type: type, - // default_value_ptr: ?*const anyopaque, - // is_comptime: bool, - // alignment: comptime_int, - // }; - // - // Note we will learn about 'anyopaque' type later - // // You'll need this builtin: // // @field(lhs: anytype, comptime field_name: []const u8) @@ -123,8 +114,8 @@ fn printTuple(tuple: anytype) void { // for declarations. If it's a value, it looks for data. // print("\"{s}\"({any}):{any} ", .{ - field.???, - field.???, + field_name, + field_type, ???, }); } |