diff --git a/build.zig b/build.zig index 9b68584..b0e2591 100644 --- a/build.zig +++ b/build.zig @@ -1,156 +1,19 @@ const std = @import("std"); -// Although this function looks imperative, it does not perform the build -// directly and instead it mutates the build graph (`b`) that will be then -// executed by an external runner. The functions in `std.Build` implement a DSL -// for defining build steps and express dependencies between them, allowing the -// build runner to parallelize the build automatically (and the cache system to -// know when a step doesn't need to be re-run). pub fn build(b: *std.Build) void { - // Standard target options allow the person running `zig build` to choose - // what target to build for. Here we do not override the defaults, which - // means any target is allowed, and the default is native. Other options - // for restricting supported target set are available. const target = b.standardTargetOptions(.{}); - // Standard optimization options allow the person running `zig build` to select - // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not - // set a preferred release mode, allowing the user to decide how to optimize. - const optimize = b.standardOptimizeOption(.{}); - // It's also possible to define more custom flags to toggle optional features - // of this build script using `b.option()`. All defined flags (including - // target and optimize options) will be listed when running `zig build --help` - // in this directory. - // This creates a module, which represents a collection of source files alongside - // some compilation options, such as optimization mode and linked system libraries. - // Zig modules are the preferred way of making Zig code available to consumers. - // addModule defines a module that we intend to make available for importing - // to our consumers. We must give it a name because a Zig package can expose - // multiple modules and consumers will need to be able to specify which - // module they want to access. const mod = b.addModule("iterating", .{ - // The root source file is the "entry point" of this module. Users of - // this module will only be able to access public declarations contained - // in this file, which means that if you have declarations that you - // intend to expose to consumers that were defined in other files part - // of this module, you will have to make sure to re-export them from - // the root file. .root_source_file = b.path("src/root.zig"), - // Later on we'll use this module as the root module of a test executable - // which requires us to specify a target. .target = target, }); - // Here we define an executable. An executable needs to have a root module - // which needs to expose a `main` function. While we could add a main function - // to the module defined above, it's sometimes preferable to split business - // business logic and the CLI into two separate modules. - // - // If your goal is to create a Zig library for others to use, consider if - // it might benefit from also exposing a CLI tool. A parser library for a - // data serialization format could also bundle a CLI syntax checker, for example. - // - // If instead your goal is to create an executable, consider if users might - // be interested in also being able to embed the core functionality of your - // program in their own executable in order to avoid the overhead involved in - // subprocessing your CLI tool. - // - // If neither case applies to you, feel free to delete the declaration you - // don't need and to put everything under a single module. - const exe = b.addExecutable(.{ - .name = "iterating", - .root_module = b.createModule(.{ - // b.createModule defines a new module just like b.addModule but, - // unlike b.addModule, it does not expose the module to consumers of - // this package, which is why in this case we don't have to give it a name. - .root_source_file = b.path("src/main.zig"), - // Target and optimization levels must be explicitly wired in when - // defining an executable or library (in the root module), and you - // can also hardcode a specific target for an executable or library - // definition if desireable (e.g. firmware for embedded devices). - .target = target, - .optimize = optimize, - // List of modules available for import in source files part of the - // root module. - .imports = &.{ - // Here "iterating" is the name you will use in your source code to - // import this module (e.g. `@import("iterating")`). The name is - // repeated because you are allowed to rename your imports, which - // can be extremely useful in case of collisions (which can happen - // importing modules from different packages). - .{ .name = "iterating", .module = mod }, - }, - }), - }); - - // This declares intent for the executable to be installed into the - // install prefix when running `zig build` (i.e. when executing the default - // step). By default the install prefix is `zig-out/` but can be overridden - // by passing `--prefix` or `-p`. - b.installArtifact(exe); - - // This creates a top level step. Top level steps have a name and can be - // invoked by name when running `zig build` (e.g. `zig build run`). - // This will evaluate the `run` step rather than the default step. - // For a top level step to actually do something, it must depend on other - // steps (e.g. a Run step, as we will see in a moment). - const run_step = b.step("run", "Run the app"); - - // This creates a RunArtifact step in the build graph. A RunArtifact step - // invokes an executable compiled by Zig. Steps will only be executed by the - // runner if invoked directly by the user (in the case of top level steps) - // or if another step depends on it, so it's up to you to define when and - // how this Run step will be executed. In our case we want to run it when - // the user runs `zig build run`, so we create a dependency link. - const run_cmd = b.addRunArtifact(exe); - run_step.dependOn(&run_cmd.step); - - // By making the run step depend on the default step, it will be run from the - // installation directory rather than directly from within the cache directory. - run_cmd.step.dependOn(b.getInstallStep()); - - // This allows the user to pass arguments to the application in the build - // command itself, like this: `zig build run -- arg1 arg2 etc` - if (b.args) |args| { - run_cmd.addArgs(args); - } - - // Creates an executable that will run `test` blocks from the provided module. - // Here `mod` needs to define a target, which is why earlier we made sure to - // set the releative field. const mod_tests = b.addTest(.{ .root_module = mod, }); - // A run step that will run the test executable. const run_mod_tests = b.addRunArtifact(mod_tests); - // Creates an executable that will run `test` blocks from the executable's - // root module. Note that test executables only test one module at a time, - // hence why we have to create two separate ones. - const exe_tests = b.addTest(.{ - .root_module = exe.root_module, - }); - - // A run step that will run the second test executable. - const run_exe_tests = b.addRunArtifact(exe_tests); - - // A top level step for running all tests. dependOn can be called multiple - // times and since the two run steps do not depend on one another, this will - // make the two of them run in parallel. const test_step = b.step("test", "Run tests"); test_step.dependOn(&run_mod_tests.step); - test_step.dependOn(&run_exe_tests.step); - - // Just like flags, top level steps are also listed in the `--help` menu. - // - // The Zig build system is entirely implemented in userland, which means - // that it cannot hook into private compiler APIs. All compilation work - // orchestrated by the build system will result in other Zig compiler - // subcommands being invoked with the right flags defined. You can observe - // these invocations when one fails (or you pass a flag to increase - // verbosity) to validate assumptions and diagnose problems. - // - // Lastly, the Zig build system is relatively simple and self-contained, - // and reading its source code will allow you to master it. } diff --git a/src/main.zig b/src/main.zig deleted file mode 100644 index 3c8abcc..0000000 --- a/src/main.zig +++ /dev/null @@ -1,25 +0,0 @@ -const std = @import("std"); -const iter = @import("iterating").Iter; - -pub fn main() !void { - const arith = struct { - fn square(x: i32) i32 { - return x * x; - } - - fn is_square(x: i32) bool { - const sqrt = @sqrt(@as(f32, @floatFromInt(x))); - return sqrt == @floor(sqrt); - } - - fn try_sqrt(x: i32) ?i32 { - const sqrt = @sqrt(@as(f32, @floatFromInt(x))); - return if (sqrt == @floor(sqrt)) @intFromFloat(sqrt) else null; - } - }; - - const items = try iter(i32).once(-100).chain(iter(i32).rangeInclusive(1, 100).filter(arith.is_square).chain(iter(i32).range(0, 10))).toOwnedSlice(std.heap.page_allocator); - defer std.heap.page_allocator.free(items); - - std.debug.print("{any}\n", .{items}); -}