69 lines
1.5 KiB
Zig
69 lines
1.5 KiB
Zig
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const coral = @import("./coral.zig");
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const std = @import("std");
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delete: *const fn (*anyopaque) void,
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erased: *anyopaque,
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fn Layout(comptime Type: type) type {
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return struct {
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allocator: std.mem.Allocator,
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value: Type,
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const TypeLayout = @This();
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fn delete(erased: *anyopaque) void {
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const layout: *TypeLayout = @ptrCast(@alignCast(erased));
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if (@hasDecl(Type, "deinit")) {
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layout.value.deinit();
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}
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layout.allocator.destroy(layout);
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}
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};
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}
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const Self = @This();
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pub fn deinit(self: *Self) void {
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self.delete(self.erased);
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self.* = undefined;
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}
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pub fn has(self: Self, comptime Type: type) ?*Type {
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const ValueLayout = Layout(Type);
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if (self.delete == ValueLayout.delete) {
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const layout: *ValueLayout = @ptrCast(@alignCast(self.erased));
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return &layout.value;
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}
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return null;
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}
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pub fn init(value: anytype) std.mem.Allocator.Error!Self {
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return initWithAllocator(coral.heap.allocator, value);
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}
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pub fn initWithAllocator(allocator: std.mem.Allocator, value: anytype) std.mem.Allocator.Error!Self {
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const ValueLayout = Layout(@TypeOf(value));
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const value_layout = try allocator.create(ValueLayout);
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errdefer {
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allocator.destroy(value_layout);
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}
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value_layout.* = .{
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.allocator = allocator,
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.value = value,
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};
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return .{
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.erased = @ptrCast(value_layout),
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.delete = ValueLayout.delete,
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};
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}
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