1 files changed, 24 insertions, 66 deletions

diff --git a/README.md b/README.md
index bbf1ea0..00ebe81 100644
--- a/README.md
+++ b/README.md
@@ -54,14 +54,7 @@ incomplete.
 The simplest way to use this library is to just call the `clap.parse` function.
 
 ```zig
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
+pub fn main(init: std.process.Init) !void {
     // First we specify what parameters our program can take.
     // We can use `parseParamsComptime` to parse a string into an array of `Param(Help)`.
     const params = comptime clap.parseParamsComptime(
@@ -76,12 +69,12 @@ pub fn main() !void {
     // This is optional. You can also pass `.{}` to `clap.parse` if you don't
     // care about the extra information `Diagnostics` provides.
     var diag = clap.Diagnostic{};
-    var res = clap.parse(clap.Help, &params, clap.parsers.default, .{
+    var res = clap.parse(clap.Help, &params, clap.parsers.default, init.minimal.args, .{
         .diagnostic = &diag,
-        .allocator = gpa,
+        .allocator = init.gpa,
     }) catch |err| {
         // Report useful error and exit.
-        try diag.reportToFile(io, .stderr(), err);
+        try diag.reportToFile(init.io, .stderr(), err);
         return err;
     };
     defer res.deinit();
@@ -112,14 +105,7 @@ contains a parser that returns `usize`. You can pass in something other than `cl
 if you want some other mapping.
 
 ```zig
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
+pub fn main(init: std.process.Init) !void {
     // First we specify what parameters our program can take.
     // We can use `parseParamsComptime` to parse a string into an array of `Param(Help)`.
     const params = comptime clap.parseParamsComptime(
@@ -142,15 +128,15 @@ pub fn main() !void {
     };
 
     var diag = clap.Diagnostic{};
-    var res = clap.parse(clap.Help, &params, parsers, .{
+    var res = clap.parse(clap.Help, &params, parsers, init.minimal.args, .{
         .diagnostic = &diag,
-        .allocator = gpa,
+        .allocator = init.gpa,
         // The assignment separator can be configured. `--number=1` and `--number:1` is now
         // allowed.
         .assignment_separators = "=:",
     }) catch |err| {
         // Report useful error and exit.
-        try diag.reportToFile(io, .stderr(), err);
+        try diag.reportToFile(init.io, .stderr(), err);
         return err;
     };
     defer res.deinit();
@@ -198,15 +184,8 @@ const main_params = clap.parseParamsComptime(
 // get the return type of `clap.parse` and `clap.parseEx`.
 const MainArgs = clap.ResultEx(clap.Help, &main_params, main_parsers);
 
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
-    var iter = try std.process.ArgIterator.initWithAllocator(gpa);
+pub fn main(init: std.process.Init) !void {
+    var iter = try init.minimal.args.iterateAllocator(init.gpa);
     defer iter.deinit();
 
     _ = iter.next();
@@ -214,7 +193,7 @@ pub fn main() !void {
     var diag = clap.Diagnostic{};
     var res = clap.parseEx(clap.Help, &main_params, main_parsers, &iter, .{
         .diagnostic = &diag,
-        .allocator = gpa,
+        .allocator = init.gpa,
 
         // Terminate the parsing of arguments after parsing the first positional (0 is passed
         // here because parsed positionals are, like slices and arrays, indexed starting at 0).
@@ -223,7 +202,7 @@ pub fn main() !void {
         // not fully consumed. It can then be reused to parse the arguments for subcommands.
         .terminating_positional = 0,
     }) catch |err| {
-        try diag.reportToFile(io, .stderr(), err);
+        try diag.reportToFile(init.io, .stderr(), err);
         return err;
     };
     defer res.deinit();
@@ -234,11 +213,11 @@ pub fn main() !void {
     const command = res.positionals[0] orelse return error.MissingCommand;
     switch (command) {
         .help => std.debug.print("--help\n", .{}),
-        .math => try mathMain(io, gpa, &iter, res),
+        .math => try mathMain(init.io, init.gpa, &iter, res),
     }
 }
 
-fn mathMain(io: std.Io, gpa: std.mem.Allocator, iter: *std.process.ArgIterator, main_args: MainArgs) !void {
+fn mathMain(io: std.Io, gpa: std.mem.Allocator, iter: *std.process.Args.Iterator, main_args: MainArgs) !void {
     // The parent arguments are not used here, but there are cases where it might be useful, so
     // this example shows how to pass the arguments around.
     _ = main_args;
@@ -284,14 +263,7 @@ The `streaming.Clap` is the base of all the other parsers. It's a streaming pars
 `args.Iterator` to provide it with arguments lazily.
 
 ```zig
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
+pub fn main(init: std.process.Init) !void {
     // First we specify what parameters our program can take.
     const params = [_]clap.Param(u8){
         .{
@@ -306,7 +278,7 @@ pub fn main() !void {
         .{ .id = 'f', .takes_value = .one },
     };
 
-    var iter = try std.process.ArgIterator.initWithAllocator(gpa);
+    var iter = try init.minimal.args.iterateAllocator(init.gpa);
     defer iter.deinit();
 
     // Skip exe argument.
@@ -316,7 +288,7 @@ pub fn main() !void {
     // This is optional. You can also leave the `diagnostic` field unset if you
     // don't care about the extra information `Diagnostic` provides.
     var diag = clap.Diagnostic{};
-    var parser = clap.streaming.Clap(u8, std.process.ArgIterator){
+    var parser = clap.streaming.Clap(u8, std.process.Args.Iterator){
         .params = &params,
         .iter = &iter,
         .diagnostic = &diag,
@@ -325,7 +297,7 @@ pub fn main() !void {
     // Because we use a streaming parser, we have to consume each argument parsed individually.
     while (parser.next() catch |err| {
         // Report useful error and exit.
-        try diag.reportToFile(io, .stderr(), err);
+        try diag.reportToFile(init.io, .stderr(), err);
         return err;
     }) |arg| {
         // arg.param will point to the parameter which matched the argument.
@@ -363,21 +335,14 @@ runtime.
 is passed to `help` to control how the help message is printed.
 
 ```zig
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
+pub fn main(init: std.process.Init) !void {
     const params = comptime clap.parseParamsComptime(
         \\-h, --help     Display this help and exit.
         \\-v, --version  Output version information and exit.
         \\
     );
 
-    var res = try clap.parse(clap.Help, &params, clap.parsers.default, .{ .allocator = gpa });
+    var res = try clap.parse(clap.Help, &params, clap.parsers.default, init.minimal.args, .{ .allocator = init.gpa });
     defer res.deinit();
 
     // `clap.help` is a function that can print a simple help message. It can print any `Param`
@@ -385,7 +350,7 @@ pub fn main() !void {
     // The last argument contains options as to how `help` should print those parameters. Using
     // `.{}` means the default options.
     if (res.args.help != 0)
-        return clap.helpToFile(io, .stderr(), clap.Help, &params, .{});
+        return clap.helpToFile(init.io, .stderr(), clap.Help, &params, .{});
 }
 
 const clap = @import("clap");
@@ -407,14 +372,7 @@ $ zig-out/bin/help --help
 `value` method so it can provide that in the output.
 
 ```zig
-pub fn main() !void {
-    var gpa_state = std.heap.DebugAllocator(.{}){};
-    const gpa = gpa_state.allocator();
-    defer _ = gpa_state.deinit();
-
-    var threaded: std.Io.Threaded = .init_single_threaded;
-    const io: std.Io = threaded.io();
-
+pub fn main(init: std.process.Init) !void {
     const params = comptime clap.parseParamsComptime(
         \\-h, --help         Display this help and exit.
         \\-v, --version      Output version information and exit.
@@ -422,13 +380,13 @@ pub fn main() !void {
         \\
     );
 
-    var res = try clap.parse(clap.Help, &params, clap.parsers.default, .{ .allocator = gpa });
+    var res = try clap.parse(clap.Help, &params, clap.parsers.default, init.minimal.args, .{ .allocator = init.gpa });
     defer res.deinit();
 
     // `clap.usageToFile` is a function that can print a simple usage string. It can print any
     // `Param` where `Id` has a `value` method (`Param(Help)` is one such parameter).
     if (res.args.help != 0)
-        return clap.usageToFile(io, .stdout(), clap.Help, &params);
+        return clap.usageToFile(init.io, .stdout(), clap.Help, &params);
 }
 
 const clap = @import("clap");