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| 1 | namespace Syntax.Trees.Statements is | |
| 2 | ||
| 3 | use Source; | |
| 4 | ||
| 5 | use Logging; | |
| 6 | ||
| 7 | class LIST: Trees.Statements.Statement, Collections.Iterable[Statement] is | |
| 8 | _statements: Collections.List[Statement]; | |
| 9 | statements: Collections.Iterable[Statement] => _statements; | |
| 10 | is_tuple_literal: bool => | |
| 11 | let l = last in | |
| 12 | ||
| 13 | if l? then | |
| 14 | l.is_tuple_literal | |
| 15 | else | |
| 16 | false | |
| 17 | fi; | |
| 18 | ||
| 19 | // Disposal bookkeeping recorded by compile-expressions, read by | |
| 20 | // IL generation; contents owned by that pass. | |
| 21 | dispose_state: Syntax.Process.LIST_DISPOSAL_STATE field; | |
| 22 | ||
| 23 | variables_to_dispose: Collections.List[Semantic.Symbols.Variable] => dispose_state.variables_to_dispose!; | |
| 24 | ||
| 25 | want_dispose: bool => dispose_state.want_dispose; | |
| 26 | provides_value: bool => true; | |
| 27 | ||
| 28 | init(location: LOCATION, statements: Collections.List[Statement]) is | |
| 29 | super.init(location); | |
| 30 | ||
| 31 | _statements = statements; | |
| 32 | si | |
| 33 | ||
| 34 | iterator: Collections.Iterator[Statement] => _statements.iterator; | |
| 35 | ||
| 36 | is_empty: bool => _statements.count == 0; | |
| 37 | ||
| 38 | last: Statement? => | |
| 39 | if _statements.count == 0 then | |
| 40 | null | |
| 41 | else | |
| 42 | _statements[_statements.count - 1] | |
| 43 | fi; | |
| 44 | ||
| 45 | set_expected_type(expected_type: Semantic.Types.Type?, error_message: string?) => | |
| 46 | let l = last in | |
| 47 | ||
| 48 | if l? then | |
| 49 | l.set_expected_type(expected_type, error_message); | |
| 50 | fi; | |
| 51 | ||
| 52 | clear_expected_type() => | |
| 53 | let l = last in | |
| 54 | ||
| 55 | if l? then | |
| 56 | l.clear_expected_type(); | |
| 57 | fi; | |
| 58 | ||
| 59 | add_variable_to_dispose(v: Semantic.Symbols.Variable) is | |
| 60 | dispose_state.add(v); | |
| 61 | si | |
| 62 | ||
| 63 | clear() is | |
| 64 | super.clear(); | |
| 65 | dispose_state.clear(); | |
| 66 | si | |
| 67 | ||
| 68 | // In-place replacement of the underlying statements. | |
| 69 | replace_all(new_statements: Collections.Iterable[Statement]) is | |
| 70 | _statements = Collections.LIST[Statement](new_statements); | |
| 71 | si | |
| 72 | ||
| 73 | accept(visitor: Visitor) is | |
| 74 | visitor.visit(self); | |
| 75 | si | |
| 76 | ||
| 77 | walk(visitor: Visitor) is | |
| 78 | if !visitor.pre(self) then | |
| 79 | for s in statements do | |
| 80 | visitor.enter_node(s); | |
| 81 | try | |
| 82 | s.walk(visitor); | |
| 83 | finally | |
| 84 | visitor.leave_node(s); | |
| 85 | yrt | |
| 86 | od | |
| 87 | fi | |
| 88 | ||
| 89 | accept(visitor); | |
| 90 | si | |
| 91 | si | |
| 92 | si |