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| 1 | namespace IR is | |
| 2 | use Logging | |
| 3 | ||
| 4 | class BLOCK_STACK: BlockContext is | |
| 5 | _blocks: Collections.STACK[Values.BLOCK] | |
| 6 | ||
| 7 | is_in_block: bool => _blocks.count > 0 | |
| 8 | ||
| 9 | init() is | |
| 10 | _blocks = Collections.STACK[Values.BLOCK]() | |
| 11 | si | |
| 12 | ||
| 13 | mark() -> int => _blocks.count | |
| 14 | ||
| 15 | release(mark: int) is | |
| 16 | while _blocks.count > mark do | |
| 17 | _blocks.pop() | |
| 18 | od | |
| 19 | si | |
| 20 | ||
| 21 | current_block: Values.BLOCK => | |
| 22 | assert _blocks.count > 0 else "BS {get_hash_code()}: no block on stack" in | |
| 23 | ||
| 24 | _blocks.peek() | |
| 25 | ||
| 26 | enter_block(block: Values.BLOCK) -> Values.BLOCK is | |
| 27 | _blocks.push(block) | |
| 28 | ||
| 29 | return block | |
| 30 | si | |
| 31 | ||
| 32 | enter_block(type: Semantic.Types.Type) -> Values.BLOCK is | |
| 33 | let result = Values.BLOCK(type) | |
| 34 | enter_block(result) | |
| 35 | return result | |
| 36 | si | |
| 37 | ||
| 38 | enter_block() -> Values.BLOCK is | |
| 39 | let result = Values.BLOCK() | |
| 40 | enter_block(result) | |
| 41 | return result | |
| 42 | si | |
| 43 | ||
| 44 | leave_block() is | |
| 45 | _blocks.pop() | |
| 46 | si | |
| 47 | ||
| 48 | add(value: Values.Value) is | |
| 49 | current_block.add(value) | |
| 50 | si | |
| 51 | si | |
| 52 | si |