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Get MessageSet IDs as a Comma-Separated String

Demonstrates the Chilkat MessageSet.ToCommaSeparatedStr method, which returns the unique identifiers as a comma-separated string in ascending numeric order. It takes no arguments; an empty set returns an empty string. This example inserts a few ids and prints them.

Background: This is the fully expanded, human-readable form — every identifier listed explicitly, such as 1,2,3,5. It is handy for logging or display. When you need the terse form that collapses consecutive runs into ranges (for example 1:3,5), use ToCompactString instead. Like the compact form, the returned string contains only the numeric values and not the HasUids setting.

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const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the MessageSet.ToCommaSeparatedStr method, which returns the unique identifiers
    // as a comma-separated string in ascending numeric order.  It takes no arguments.

    const msg_set = try chilkat.MessageSet.init();
    defer msg_set.deinit();

    // Build a set by inserting individual identifiers.  The insertion order does not matter;
    // the identifiers are kept in ascending order and duplicates are ignored.
    msg_set.insertId(3);
    msg_set.insertId(1);
    msg_set.insertId(2);
    msg_set.insertId(5);

    // Get the identifiers as a comma-separated string.
    const csv = try msg_set.toCommaSeparatedStr(alloc);
    std.debug.print("{s}\n", .{csv});
    // Output: 1,2,3,5
}