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pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
// 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(
\\-h, --help Display this help and exit.
\\-n, --number <INT> An option parameter, which takes a value.
\\-a, --answer <ANSWER> An option parameter which takes an enum.
\\-s, --string <STR>... An option parameter which can be specified multiple times.
\\<FILE>...
\\
);
// Declare our own parsers which are used to map the argument strings to other
// types.
const YesNo = enum { yes, no };
const parsers = comptime .{
.STR = clap.parsers.string,
.FILE = clap.parsers.string,
.INT = clap.parsers.int(usize, 10),
.ANSWER = clap.parsers.enumeration(YesNo),
};
var diag = clap.Diagnostic{};
var res = clap.parse(clap.Help, ¶ms, parsers, .{
.diagnostic = &diag,
.allocator = gpa.allocator(),
// 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(.stderr(), err);
return err;
};
defer res.deinit();
if (res.args.help != 0)
std.debug.print("--help\n", .{});
if (res.args.number) |n|
std.debug.print("--number = {}\n", .{n});
if (res.args.answer) |a|
std.debug.print("--answer = {s}\n", .{@tagName(a)});
for (res.args.string) |s|
std.debug.print("--string = {s}\n", .{s});
for (res.positionals[0]) |pos|
std.debug.print("{s}\n", .{pos});
}
const clap = @import("clap");
const std = @import("std");
|
