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# zig-clap
A non allocating, fast and easy to use command line argument parser library for Zig.
# Example
```
const std = @import("std");
const clap = @import("clap.zig");
const debug = std.debug;
const os = std.os;
const Clap = clap.Clap;
const Command = clap.Command;
const Argument = clap.Argument;
const Options = struct {
print_values: bool,
a: i64,
b: u64,
c: u8,
};
pub fn main() !void {
const parser = comptime Clap(Options).Builder
.init(
Options {
.print_values = false,
.a = 0,
.b = 0,
.c = 0,
}
)
.programName("My Test Command")
.author("Hejsil")
.version("v1")
.about("Prints some values to the screen... Maybe.")
.command(
Command.Builder
.init("command")
.arguments(
[]Argument {
Argument.Builder
.init("a")
.help("Set the a field of Option.")
.short('a')
.takesValue(true)
.build(),
Argument.Builder
.init("b")
.help("Set the b field of Option.")
.short('b')
.takesValue(true)
.build(),
Argument.Builder
.init("c")
.help("Set the c field of Option.")
.short('c')
.takesValue(true)
.build(),
Argument.Builder
.init("print_values")
.help("Print all not 0 values.")
.short('p')
.long("print-values")
.build(),
}
)
.build()
)
.build();
const args = try os.argsAlloc(debug.global_allocator);
defer os.argsFree(debug.global_allocator, args);
const options = try parser.parse(args[1..]);
if (options.print_values) {
if (options.a != 0) debug.warn("a = {}\n", options.a);
if (options.b != 0) debug.warn("b = {}\n", options.b);
if (options.c != 0) debug.warn("c = {}\n", options.c);
}
}
```
Running example:
```
sample % ./sample [0]
sample % ./sample -a 2 -b 4 -c 6 [0]
sample % ./sample -a 2 -b 4 -c 6 -p [0]
a = 2
b = 4
c = 6
sample % ./sample -a 2 -b 4 -c 6 --print-values [0]
a = 2
b = 4
c = 6
```
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