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| 1 | namespace Semantic.Symbols is | |
| 2 | use System.NotImplementedException; | |
| 3 | ||
| 4 | use IoC; | |
| 5 | use Logging; | |
| 6 | use Source; | |
| 7 | ||
| 8 | use IR.Values.Value; | |
| 9 | ||
| 10 | use Types.Type; | |
| 11 | ||
| 12 | use Ghul.Pipes; | |
| 13 | ||
| 14 | class FUNCTION_GROUP: Symbol, Types.Typed is | |
| 15 | _functions: Collections.LIST[Function]; | |
| 16 | ||
| 17 | count: int => _functions.count; | |
| 18 | is_empty: bool => _functions.count == 0; | |
| 19 | ||
| 20 | short_description: string => "{name}(...)"; | |
| 21 | ||
| 22 | describe(context: DESCRIBE_CONTEXT) -> SignaturePart => | |
| 23 | PARTS.sequence([ | |
| 24 | PARTS.name(self), | |
| 25 | PARTS.literal("(...)") | |
| 26 | ]); | |
| 27 | ||
| 28 | describe_kind(context: DESCRIBE_CONTEXT) -> string? => "function group"; | |
| 29 | symbol_kind: SymbolKind => SymbolKind.FUNCTION; | |
| 30 | completion_kind: CompletionKind => CompletionKind.FUNCTION; | |
| 31 | ||
| 32 | is_function_group: bool => true; | |
| 33 | ||
| 34 | type: Type; | |
| 35 | ||
| 36 | set_type(value: Type) is type = value; si | |
| 37 | ||
| 38 | functions: Collections.List[Function] => _functions; | |
| 39 | ||
| 40 | init(location: LOCATION, owner: Scope, name: string) is | |
| 41 | super.init(location, owner, name); | |
| 42 | ||
| 43 | type = Types.FUNCTION_GROUP(name, self); | |
| 44 | _functions = Collections.LIST[Function](); | |
| 45 | si | |
| 46 | ||
| 47 | specialize_function_group(type_map: Collections.Map[string,Type], owner: GENERIC) -> FUNCTION_GROUP is | |
| 48 | let result = cast FUNCTION_GROUP?(memberwise_clone())!; | |
| 49 | ||
| 50 | result.specialized_from = self; | |
| 51 | ||
| 52 | result.type = Types.FUNCTION_GROUP( | |
| 53 | name, | |
| 54 | result | |
| 55 | ); | |
| 56 | ||
| 57 | // Pre-sized empty, filled by add: a LIST(_functions) copy would | |
| 58 | // duplicate every element only for the loop to overwrite them all. | |
| 59 | result._functions = Collections.LIST[Function](_functions.count); | |
| 60 | ||
| 61 | for i in 0.._functions.count do | |
| 62 | result._functions.add(_functions[i].specialize_function(type_map, owner)); | |
| 63 | od | |
| 64 | ||
| 65 | return result; | |
| 66 | si | |
| 67 | ||
| 68 | specialize(type_map: Collections.Map[string,Type], owner: GENERIC) -> Symbol => | |
| 69 | specialize_function_group(type_map, owner); | |
| 70 | ||
| 71 | try_specialize( | |
| 72 | location: LOCATION, | |
| 73 | logger: Logger, | |
| 74 | actual_type_arguments: Collections.List[Type] | |
| 75 | ) -> Symbol? | |
| 76 | is | |
| 77 | let result_functions = Collections.LIST[Symbol](); | |
| 78 | let result = FUNCTION_GROUP(location, owner!, name); | |
| 79 | ||
| 80 | let expected_argument_counts = Collections.LIST[int](); | |
| 81 | ||
| 82 | for f in _functions do | |
| 83 | if f.is_generic then | |
| 84 | if f.generic_arguments.count == actual_type_arguments.count then | |
| 85 | GENERIC_CONSTRAINT_CHECKER().check_arguments( | |
| 86 | location, | |
| 87 | logger, | |
| 88 | f, | |
| 89 | f.generic_argument_names, | |
| 90 | actual_type_arguments | |
| 91 | ); | |
| 92 | ||
| 93 | let sf = f.specialize(actual_type_arguments); | |
| 94 | ||
| 95 | result.add(cast Function?(sf)!); | |
| 96 | else | |
| 97 | expected_argument_counts.add(f.generic_arguments.count); | |
| 98 | fi | |
| 99 | fi | |
| 100 | od | |
| 101 | ||
| 102 | if result.is_empty then | |
| 103 | if expected_argument_counts.count > 0 then | |
| 104 | let counts_string mut = expected_argument_counts |> sort() |> join(", "); | |
| 105 | let last_comma_index = counts_string.last_index_of(", "); | |
| 106 | ||
| 107 | if last_comma_index >= 0 then | |
| 108 | counts_string = counts_string.remove(last_comma_index, 2).insert(last_comma_index, " or "); | |
| 109 | fi | |
| 110 | ||
| 111 | logger.error(location, "expected {counts_string} type arguments but found {actual_type_arguments.count}"); | |
| 112 | else | |
| 113 | logger.error(location, "cannot supply type arguments here"); | |
| 114 | fi | |
| 115 | ||
| 116 | return null; | |
| 117 | fi | |
| 118 | ||
| 119 | return result; | |
| 120 | si | |
| 121 | ||
| 122 | remove(function: Function) is | |
| 123 | _functions.remove(function); | |
| 124 | si | |
| 125 | ||
| 126 | add(function: Function) is | |
| 127 | _functions.add(function); | |
| 128 | si | |
| 129 | ||
| 130 | // Combine this group with a same-named group from an enclosing | |
| 131 | // scope: all of this group's functions are kept, and an outer | |
| 132 | // function only joins the overload set when no function here | |
| 133 | // already covers its override class. | |
| 134 | merged_over(outer: FUNCTION_GROUP) -> FUNCTION_GROUP is | |
| 135 | let combined = FUNCTION_GROUP(location, owner!, name); | |
| 136 | ||
| 137 | let seen = Collections.SET[METHOD_OVERRIDE_CLASS](); | |
| 138 | ||
| 139 | for f in _functions do | |
| 140 | seen.add(f.override_class); | |
| 141 | combined.add(f); | |
| 142 | od | |
| 143 | ||
| 144 | for f in outer.functions do | |
| 145 | if !seen.contains(f.override_class) then | |
| 146 | combined.add(f); | |
| 147 | fi | |
| 148 | od | |
| 149 | ||
| 150 | return combined; | |
| 151 | si | |
| 152 | ||
| 153 | add(fg: FUNCTION_GROUP) is | |
| 154 | _functions.add_range(fg.functions); | |
| 155 | si | |
| 156 | ||
| 157 | load(location: LOCATION, from: Value?, loader: SYMBOL_LOADER) -> Value => | |
| 158 | loader.load_function_group(from, self); | |
| 159 | ||
| 160 | call(location: Source.LOCATION, from: Value?, arguments: Collections.List[Value], type: Type?, caller: FUNCTION_CALLER) -> IR.Values.Value => throw NotImplementedException("cannot call unresolved function overload group: {self}"); | |
| 161 | collapse_group_if_single_member() -> Symbols.Symbol => | |
| 162 | if _functions.count == 1 then | |
| 163 | _functions[0]; | |
| 164 | else | |
| 165 | self; | |
| 166 | fi; | |
| 167 | ||
| 168 | to_string() -> string => | |
| 169 | "{description} [{_functions|}]"; | |
| 170 | si | |
| 171 | si |