blob: 3b7b42b1d503921c83c6241150ed008b2676e274 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
const std = @import("std");
const clap = @import("clap");
const debug = std.debug;
pub fn main() !void {
var direct_allocator = std.heap.DirectAllocator.init();
const allocator = &direct_allocator.allocator;
defer direct_allocator.deinit();
// First we specify what parameters our program can take.
const params = comptime []clap.Param(void){
// Param.init takes 3 arguments.
// * An "id", which can be any type specified by the argument to Param. The
// ComptimeClap expects clap.Param(void) only.
// * A bool which determins wether the parameter takes a value.
// * A "Names" struct, which determins what names the parameter will have on the
// commandline. Names.prefix inits a "Names" struct that has the "short" name
// set to the first letter, and the "long" name set to the full name.
clap.Param(void).flag({}, clap.Names.prefix("help")),
clap.Param(void).option({}, clap.Names.prefix("number")),
// Names.positional returns a "Names" struct where neither the "short" or "long"
// name is set.
clap.Param(void).positional({}),
};
// We then initialize an argument iterator. We will use the OsIterator as it nicely
// wraps iterating over arguments the most efficient way on each os.
var os_iter = clap.args.OsIterator.init(allocator);
const iter = &os_iter.iter;
defer os_iter.deinit();
// Consume the exe arg.
const exe = try iter.next();
// Finally we can parse the arguments
var args = try clap.ComptimeClap(void, params).parse(allocator, clap.args.OsIterator.Error, iter);
defer args.deinit();
if (args.flag("--help"))
debug.warn("Help!\n");
if (args.option("--number")) |n|
debug.warn("--number = {}\n", n);
for (args.positionals()) |pos|
debug.warn("{}\n", pos);
}
|
