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const std = @import("std");
const func = @import("funcz");
fn iter(n: i32) i32 {
return n + 1;
}
fn mul2(n: i32) i32 {
return n * 2;
}
pub fn main() !void {
var gpa = std.heap.DebugAllocator(.{}){};
const allocator = gpa.allocator();
const iterThenMul2 = func.compose(mul2, iter);
var items = [_]i32{ 0, 1, 2, 3, 4 };
const itemsSlice: []i32 = items[0..items.len];
const newItems = try func.mapAlloc(allocator, iterThenMul2, itemsSlice);
defer allocator.free(newItems);
var buffer: [128]i32 = undefined;
func.map(iterThenMul2, itemsSlice, &buffer);
std.debug.print("compose(mul2, iter)(5) = {d}\n", .{ iterThenMul2(5) });
std.debug.print("mapAlloc(allocator, compose(mul2, iter), []i32{{ 0, 1, 2, 3, 4 }}) = {{ ", .{});
for(newItems) |item| {
std.debug.print("{d}, ", .{item});
}
std.debug.print("}}\n", .{});
std.debug.print("map(compose(mul2, iter), []i32{{ 0, 1, 2, 3, 4 }}, &buffer) = {{ ", .{});
for(buffer[0..items.len]) |item| {
std.debug.print("{d}, ", .{item});
}
std.debug.print("}}\n", .{});
}
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