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typeinfo.ts
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74 lines (71 loc) · 2.98 KB
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// This file is shared with the compiler and must remain portable
// ╒═══════════════════ Typeinfo interpretation ═══════════════════╕
// 3 2 1
// 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 bits
// ├─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┤ ◄─ __rtti_base
// │ count │
// ╞═══════════════════════════════════════════════════════════════╡ ┐
// │ Typeinfo#flags [id=0] │ id < count
// ├ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┤
// │ Typeinfo#base [id=0] │
// ├───────────────────────────────────────────────────────────────┤
// │ ... │
/** Runtime type information data structure. */
@unmanaged
export class Typeinfo {
/** Flags describing the shape of this class type. */
flags: TypeinfoFlags;
/** Base class id or `0` if none. */
base: u32;
}
/** Runtime type information flags. */
export const enum TypeinfoFlags {
/** No specific flags. */
NONE = 0,
/** Type is an `ArrayBufferView`. */
ARRAYBUFFERVIEW = 1 << 0,
/** Type is an `Array`. */
ARRAY = 1 << 1,
/** Type is a `Set`. */
SET = 1 << 2,
/** Type is a `Map`. */
MAP = 1 << 3,
/** Type is inherently acyclic. */
ACYCLIC = 1 << 4,
/** Value alignment of 1 byte. */
VALUE_ALIGN_0 = 1 << 5,
/** Value alignment of 2 bytes. */
VALUE_ALIGN_1 = 1 << 6,
/** Value alignment of 4 bytes. */
VALUE_ALIGN_2 = 1 << 7,
/** Value alignment of 8 bytes. */
VALUE_ALIGN_3 = 1 << 8,
/** Value alignment of 16 bytes. */
VALUE_ALIGN_4 = 1 << 9,
/** Value is a signed type. */
VALUE_SIGNED = 1 << 10,
/** Value is a float type. */
VALUE_FLOAT = 1 << 11,
/** Value type is nullable. */
VALUE_NULLABLE = 1 << 12,
/** Value type is managed. */
VALUE_MANAGED = 1 << 13,
/** Key alignment of 1 byte. */
KEY_ALIGN_0 = 1 << 14,
/** Key alignment of 2 bytes. */
KEY_ALIGN_1 = 1 << 15,
/** Key alignment of 4 bytes. */
KEY_ALIGN_2 = 1 << 16,
/** Key alignment of 8 bytes. */
KEY_ALIGN_3 = 1 << 17,
/** Key alignment of 16 bytes. */
KEY_ALIGN_4 = 1 << 18,
/** Key is a signed type. */
KEY_SIGNED = 1 << 19,
/** Key is a float type. */
KEY_FLOAT = 1 << 20,
/** Key type is nullable. */
KEY_NULLABLE = 1 << 21,
/** Key type is managed. */
KEY_MANAGED = 1 << 22
}