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| 1 | namespace Semantic.Types is | |
| 2 | use System.Text.StringBuilder | |
| 3 | ||
| 4 | use Source | |
| 5 | ||
| 6 | class GenericArgument: NAMED abstract is | |
| 7 | is_wild: bool => true | |
| 8 | is_function_generic_argument: bool => false | |
| 9 | is_classy_generic_argument: bool => false | |
| 10 | ||
| 11 | init(symbol: Symbols.Symbol) is | |
| 12 | super.init(symbol) | |
| 13 | si | |
| 14 | ||
| 15 | get_type_arguments_into(results: Collections.LIST[GenericArgument]) is | |
| 16 | results.add(self) | |
| 17 | si | |
| 18 | ||
| 19 | freeze() -> Type? is | |
| 20 | let frozen = symbol.freeze() | |
| 21 | ||
| 22 | if !frozen? then | |
| 23 | return null | |
| 24 | fi | |
| 25 | ||
| 26 | return frozen.type | |
| 27 | si | |
| 28 | ||
| 29 | specialize(type_map: Collections.Map[Symbols.Symbol,Type]) -> Type is | |
| 30 | let result: Type mut | |
| 31 | ||
| 32 | if type_map.try_get_value(symbol, result ref) then | |
| 33 | // A `T?` keeps its nullability across substitution. | |
| 34 | if is_optional then | |
| 35 | return result.as_optional() | |
| 36 | else | |
| 37 | return result | |
| 38 | fi | |
| 39 | fi | |
| 40 | ||
| 41 | return self | |
| 42 | si | |
| 43 | ||
| 44 | bind_type_variables(other: Type, results: GENERIC_ARGUMENT_BIND_RESULTS) -> bool => | |
| 45 | results.bind(self, other) | |
| 46 | ||
| 47 | to_string() -> string => | |
| 48 | if is_optional then | |
| 49 | "{symbol.name}?" | |
| 50 | else | |
| 51 | symbol.name | |
| 52 | fi | |
| 53 | si | |
| 54 | ||
| 55 | // TODO can get is classy vs is function from underlying symbol, | |
| 56 | // delete these sub-classes and go back to having just | |
| 57 | // one class representing a generic argument type | |
| 58 | class CLASSY_GENERIC_ARGUMENT: GenericArgument is | |
| 59 | is_classy_generic_argument: bool => true | |
| 60 | ||
| 61 | init(symbol: Symbols.Symbol) is | |
| 62 | super.init(symbol) | |
| 63 | si | |
| 64 | si | |
| 65 | ||
| 66 | class FUNCTION_GENERIC_ARGUMENT: GenericArgument is | |
| 67 | is_function_generic_argument: bool => true | |
| 68 | ||
| 69 | init(symbol: Symbols.Symbol) is | |
| 70 | super.init(symbol) | |
| 71 | si | |
| 72 | si | |
| 73 | si |