73 lines
3.1 KiB
Zig
73 lines
3.1 KiB
Zig
|
pub const std = @import("std");
|
||
|
|
|
||
|
|
pub fn Union(comptime T: type) type {
|
||
|
|
return struct {
|
||
|
|
const Self = @This();
|
||
|
|
|
||
|
|
value: T,
|
||
|
|
|
||
|
|
pub fn jsonParse(allocator: std.mem.Allocator, source: anytype, options: std.json.ParseOptions) !Self {
|
||
|
|
return jsonParseFromValue(
|
||
|
|
allocator,
|
||
|
|
try std.json.innerParse(
|
||
|
|
std.json.Value,
|
||
|
|
allocator,
|
||
|
|
source,
|
||
|
|
options,
|
||
|
|
),
|
||
|
|
options,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn jsonParseFromValue(allocator: std.mem.Allocator, source: std.json.Value, options: std.json.ParseOptions) !Self {
|
||
|
|
inline for (std.meta.fields(T)) |field| {
|
||
|
|
switch (field.type) {
|
||
|
|
bool => if (source == .bool) return .{ .value = @unionInit(T, field.name, source.bool) },
|
||
|
|
[]const u8 => switch (source) {
|
||
|
|
.string => |v| return .{ .value = @unionInit(T, field.name, v) },
|
||
|
|
.number_string => |v| return .{ .value = @unionInit(T, field.name, v) },
|
||
|
|
else => {},
|
||
|
|
},
|
||
|
|
else => switch (@typeInfo(field.type)) {
|
||
|
|
.Int => if (source == .integer) return .{ .value = @unionInit(T, field.name, @intCast(source.integer)) },
|
||
|
|
.Float => if (source == .float) return .{ .value = @unionInit(T, field.name, @floatCast(source.float)) },
|
||
|
|
.Struct => if (source == .object) return .{ .value = @unionInit(T, field.name, try std.json.innerParseFromValue(field.type, allocator, source.object, options)) },
|
||
|
|
inline else => switch (source) {
|
||
|
|
.number_string, .array => return .{ .value = @unionInit(T, field.name, try std.json.innerParseFromValue(field.type, allocator, source, options)) },
|
||
|
|
else => {},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return error.UnexpectedToken;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn NeverNull(comptime T: type, comptime default_value: T) type {
|
||
|
|
return struct {
|
||
|
|
const Self = @This();
|
||
|
|
|
||
|
|
value: T = default_value,
|
||
|
|
|
||
|
|
pub fn jsonParse(allocator: std.mem.Allocator, source: anytype, options: std.json.ParseOptions) !Self {
|
||
|
|
return .{ .value = (try std.json.innerParse(?T, allocator, source, options)) orelse default_value };
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn jsonParseFromValue(allocator: std.mem.Allocator, source: std.json.Value, options: std.json.ParseOptions) !Self {
|
||
|
|
return .{ .value = (try std.json.innerParseFromValue(?T, allocator, source, options)) orelse default_value };
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn fillDefaultStructValues(comptime T: type, r: *T) !void {
|
||
|
|
inline for (@typeInfo(T).Struct.fields) |field| {
|
||
|
|
if (field.default_value) |default_ptr| {
|
||
|
|
if (@field(r, field.name) == null) {
|
||
|
|
const default = @as(*align(1) const field.type, @ptrCast(default_ptr)).*;
|
||
|
|
@field(r, field.name) = default;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|