59 lines
1.6 KiB
Zig
59 lines
1.6 KiB
Zig
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const std = @import("std");
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inline fn indent(depth: usize, writer: anytype) !void {
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for (0..depth) |_| try writer.writeByte(' ');
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}
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pub fn describe(comptime T: type, writer: anytype, depth: usize) !void {
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const type_info = @typeInfo(T);
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switch (type_info) {
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.Type,
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.Void,
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.Bool,
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.NoReturn,
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.Int,
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.Float,
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.Pointer,
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.Array,
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.ComptimeFloat,
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.ComptimeInt,
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.Undefined,
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.Null,
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.Optional,
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.ErrorUnion,
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.ErrorSet,
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.Enum,
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.Fn,
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.Opaque,
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.Frame,
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.AnyFrame,
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.Vector,
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.EnumLiteral,
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=> {
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try writer.print("{s} ({d} bytes)", .{ @typeName(T), @sizeOf(T) });
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},
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.Union => |s| {
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try writer.print("{s} ({d} bytes) {{\n", .{ @typeName(T), @sizeOf(T) });
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inline for (s.fields) |f| {
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try indent(depth + 4, writer);
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try writer.print("{s}: ", .{f.name});
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try describe(f.type, writer, depth + 4);
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try writer.writeByte('\n');
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}
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try indent(depth, writer);
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try writer.writeByte('}');
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},
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.Struct => |s| {
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try writer.print("{s} ({d} bytes) {{\n", .{ @typeName(T), @sizeOf(T) });
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inline for (s.fields) |f| {
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try indent(depth + 4, writer);
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try writer.print("{s}: ", .{f.name});
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try describe(f.type, writer, depth + 4);
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try writer.writeByte('\n');
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}
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try indent(depth, writer);
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try writer.writeByte('}');
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},
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}
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}
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