The following flags are associated with this enumeration:
| Flag | Equals |
| JST_EMPTY | 0, |
| JST_BLOCK | 1, |
| JST_IF | 2, |
| JST_WHILE | 3, |
| JST_DO | 4, |
| JST_FOR | 5, |
| JST_SWITCH | 6, |
| JST_CASE | 7, |
| JST_TRY | 8, |
| JST_BREAK | 9, |
| JST_CONTINUE | 10, |
| JST_LABEL | 11, |
| JST_RETURN | 12, |
| JST_THROW | 13, |
| JST_SYNC | 14, |
| JST_EXPRESSION | 15, |
| JST_DECLARATION | 16, |
| JST_SWITCHLABEL | 17, |
| JST_LOCALCLASS | 18, |