nice-data/examples/reify.zig

103 lines
3.4 KiB
Zig

// This example is dedicated to the public domain or, where that is not possible,
// licensed under CC0-1.0, available at https://spdx.org/licenses/CC0-1.0.html
const std = @import("std");
const nice = @import("nice");
const Enum = enum { first, second, third };
const TagUnion = union(Enum) { first: []const u8, second: i32, third: void };
const Example = struct {
useful: bool,
number: i32,
string: []const u8,
longstring: [:0]const u8,
tuple: struct { bool, i8 },
enume: Enum,
taggart: TagUnion,
voidtag: TagUnion,
exist: ?bool,
again: ?bool,
array: [5]i16,
nested: [3]struct { index: usize, title: []const u8 },
};
const source =
\\useful: true
\\number: 0x9001
\\string: > salutations, earthen oblate spheroid
\\
\\longstring:
\\ | If, at first, you don't think this string has
\\ + multiple lines, then perhaps you are the one who is
\\ # yeah, let's add a newline here
\\ > wrong.
\\ # and a trailing newline for good measure
\\ >
\\tuple: [ no, 127 ]
\\enume: .second
\\taggart: {.first: string a thing}
\\voidtag: .third
\\list:
\\ - I am a list item
\\exist: null
\\again: true
\\array: [ 1, 2, 3, 4, 5 ]
\\nested:
\\ - { index: 1, title: none }
\\ - { index: 2, title: such }
\\ - { index: 3, title: luck }
\\
;
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const allocator = gpa.allocator();
var diagnostics = nice.Diagnostics{};
var loaded = nice.parseBufferTo(Example, allocator, source, &diagnostics, .{}) catch |err| {
std.debug.print("row:{d} col:{d}: {s}\n", .{
diagnostics.row,
diagnostics.line_offset,
diagnostics.message,
});
return err;
};
defer loaded.deinit();
std.debug.print("{s} {{\n", .{@typeName(Example)});
std.debug.print(" useful: {}\n", .{loaded.value.useful});
std.debug.print(" number: {d}\n", .{loaded.value.number});
std.debug.print(" string: {s}\n", .{loaded.value.string});
std.debug.print(" longstring: {s}\n", .{loaded.value.longstring});
std.debug.print(" tuple: {{ {}, {d} }}\n", .{ loaded.value.tuple[0], loaded.value.tuple[1] });
std.debug.print(" enume: .{s}\n", .{@tagName(loaded.value.enume)});
std.debug.print(" taggart: ", .{});
switch (loaded.value.taggart) {
.first => |val| std.debug.print(".first = {s}\n", .{val}),
.second => |val| std.debug.print(".second = {d}\n", .{val}),
.third => std.debug.print(".third\n", .{}),
}
std.debug.print(" voidtag: ", .{});
switch (loaded.value.voidtag) {
.first => |val| std.debug.print(".first = {s}\n", .{val}),
.second => |val| std.debug.print(".second = {d}\n", .{val}),
.third => std.debug.print(".third\n", .{}),
}
std.debug.print(" exist: {?}\n", .{loaded.value.exist});
std.debug.print(" again: {?}\n", .{loaded.value.again});
std.debug.print(" array: [ ", .{});
for (loaded.value.array) |item| {
std.debug.print("{d}, ", .{item});
}
std.debug.print("]\n", .{});
std.debug.print(" nested: [\n", .{});
for (loaded.value.nested) |item| {
std.debug.print(" {{ index: {d}, title: {s} }}\n", .{ item.index, item.title });
}
std.debug.print(" ]\n", .{});
std.debug.print("}}\n", .{});
}