Hello,
As a newbie I am going over this excellent tutorial wherein we see examples of how memory is allocated by library functions, but I fail to see were a defer is used to deallocate the memory. I have coded this and used this to check for leaks:
const leaked1 = gpa.detectLeaks();
std.debug.print("leak 1 = {}\n", .{leaked1});
No leaks show up, so were and how is memory deallocated? At the end I show 3 such examples I have used.
TIA for the help.
Example 1:
{
const say = std.fmt.allocPrint(allocator, "It's over {d}!!!", .{user.power});
// defer allocator.free(say);
// std.debug.print("Heap allocated string = {s}\n", .{say.*});
if (say) |v| {
std.debug.print("Heap allocated string = {s}\n", .{v});
defer allocator.free(v);
} else |err| {
std.debug.print("if error = {}\n", .{err});
}
}
Example 2:
const leto_name = "Leto";
{
var name_buf: [100]u8 = undefined;
const greeting = try std.fmt.bufPrint(&name_buf, "Hello {s}", .{leto_name});
std.debug.print("{s}\n", .{greeting});
}
Example 3:
{
const out = std.io.getStdOut();
try std.json.stringify(.{
.this_is = "an anonymous struct",
.above = true,
.last_param = "are options",
}, .{ .whitespace = .indent_2 }, out.writer());
}