Meta type ‣ isArgumentString(T, arg_index) ᴾᴴᴾ - chung-leong/zigar GitHub Wiki

JavaScript | PHP

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Determine whether an argument to a callback function should be a text string.

Usage:

const std = @import("std");

const Callback = fn ([]const u8) void;
pub fn call(cb: *const Callback) void {
    cb("hello");
}

pub const @"meta(zigar)" = struct {
    pub fn isArgumentString(comptime T: type, comptime arg_index: usize) bool {
        return T == Callback and arg_index == 0;
    }
};

<?php

$m = zigar_use(__DIR__ . '/meta-type-string-example-3.zig');

$m->call(function ($arg) {
    echo "$arg\n";
});

hello

Arguments:

• T - Callback function type
• arg_index - Index of argument in question

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Meta types | Text string