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| 1 | namespace Syntax.Trees.Definitions is | |
| 2 | use IO.Std | |
| 3 | ||
| 4 | use Source | |
| 5 | ||
| 6 | class FUNCTION( | |
| 7 | location: LOCATION, | |
| 8 | name: Identifiers.Identifier?, | |
| 9 | generic_arguments: TypeExpressions.LIST, | |
| 10 | arguments: Variables.LIST public, | |
| 11 | type_expression: TypeExpressions.TypeExpression, | |
| 12 | modifiers: Modifiers.LIST, | |
| 13 | body: Bodies.Body? public | |
| 14 | ): MODIFIABLE, ScopeCarrier is | |
| 15 | scope: Semantic.Scope? public | |
| 16 | ||
| 17 | // True when the body contains an `await` expression (not in | |
| 18 | // a nested lambda). Set by declare-symbols. Drives async | |
| 19 | // classification + downstream IL emission decisions. | |
| 20 | contains_let_await: bool public | |
| 21 | ||
| 22 | // True when `contains_let_await` is set AND the body has no | |
| 23 | // value-returning `return X;` statements — meaning the | |
| 24 | // function returns the non-generic `Tasks.TASK` (rather than | |
| 25 | // `Tasks.TASK[T]` for some T). | |
| 26 | is_void_async: bool public | |
| 27 | ||
| 28 | // Set on the `init` FUNCTION synthesised by | |
| 29 | // rewrite-primary-constructors from a class's primary-constructor | |
| 30 | // header. Lets declare-symbols record the primary constructor on | |
| 31 | // the owning type (a class can have secondary constructors too, so | |
| 32 | // the primary is not simply the only `init`). | |
| 33 | is_primary_constructor: bool public | |
| 34 | ||
| 35 | // Set on a FUNCTION the compiler wrote that stands for no | |
| 36 | // member the user did, and that keeps a real source location so | |
| 37 | // its diagnostics anchor somewhere meaningful — a union's | |
| 38 | // structural `=~` and `get_hash_code`, for instance, which are | |
| 39 | // built at the union's own declaration. Distinct from a | |
| 40 | // synthesised accessor, which does stand for a written member. | |
| 41 | is_synthesized: bool public | |
| 42 | ||
| 43 | mark_synthesized() is | |
| 44 | is_synthesized = true | |
| 45 | si | |
| 46 | ||
| 47 | // Set on the FUNCTION synthesise-top-level-entry builds from a | |
| 48 | // file's top-level statements. Declare-members copies it onto the | |
| 49 | // function's symbol, which distinguishes the synthesised entry | |
| 50 | // from every other function during name resolution. | |
| 51 | is_top_level_entry: bool public | |
| 52 | ||
| 53 | // Set on the private CLR-facing `_entry` wrapper that | |
| 54 | // synthesise-entry-environment-wrapper builds beside a hand-written | |
| 55 | // entry function declaring a `Ghul.Environment` parameter. Read by | |
| 56 | // select-entry-point, which treats it as a named-entry candidate | |
| 57 | // even though its own name never matches `--entry`. | |
| 58 | is_synthesized_main_wrapper: bool public | |
| 59 | ||
| 60 | // Set on the hand-written entry function a synthesised `_entry` | |
| 61 | // wrapper stands in for. Read by select-entry-point, which excludes | |
| 62 | // it from candidacy entirely: its own signature is never | |
| 63 | // Main-compatible, and the wrapper is what represents it. | |
| 64 | wrapped_by_synthesized_main: bool public | |
| 65 | ||
| 66 | // Set on a synthesised `_entry` wrapper whose wrapped function is a | |
| 67 | // top-level entry. Read by select-entry-point, which ranks it with | |
| 68 | // the top-level candidates rather than the named ones, so several | |
| 69 | // files each carrying top-level statements stay the tolerated tie | |
| 70 | // they are without a wrapper. | |
| 71 | wraps_top_level_entry: bool public | |
| 72 | ||
| 73 | for_property: PROPERTY? public | |
| 74 | ||
| 75 | // Set on the accessor FUNCTIONs synthesised by add-accessors-for- | |
| 76 | // properties when the owning property is underscore-prefixed. The | |
| 77 | // accessor's own IL name ($get_/$set_) does not start with an | |
| 78 | // underscore, so this carries the property's underscore scope | |
| 79 | // through to declare-symbols, where it drives the access policy. | |
| 80 | is_underscore_scoped: bool public | |
| 81 | ||
| 82 | // Set on FUNCTIONs synthesised by add-accessors-for- | |
| 83 | // properties from a `[index]: T` indexer. The CLR-required | |
| 84 | // accessor names aren't user-chosen, so | |
| 85 | // diagnostics that target user naming (e.g. the snake_case | |
| 86 | // member-name warning) gate on `!for_indexer?`. | |
| 87 | for_indexer: INDEXER? public | |
| 88 | ||
| 89 | // For a synthesised accessor (for_property or for_indexer | |
| 90 | // set): true for the assign accessor, false for the read | |
| 91 | // accessor. Carries which half this is structurally, so | |
| 92 | // nothing has to infer it back from the accessor's name. | |
| 93 | is_assign_accessor: bool public | |
| 94 | ||
| 95 | super(location, modifiers) | |
| 96 | ||
| 97 | accept(visitor: Visitor) is | |
| 98 | visitor.visit(self) | |
| 99 | si | |
| 100 | ||
| 101 | walk(visitor: Visitor) is | |
| 102 | if !visitor.pre(self) then | |
| 103 | // the children can be left null when the parser hits | |
| 104 | // catastrophic input and unwinds out of the declaration | |
| 105 | if name? then | |
| 106 | name.walk(visitor) | |
| 107 | fi | |
| 108 | ||
| 109 | arguments.walk(visitor) | |
| 110 | ||
| 111 | type_expression.walk(visitor) | |
| 112 | ||
| 113 | if body? then | |
| 114 | body.walk(visitor) | |
| 115 | fi | |
| 116 | fi | |
| 117 | ||
| 118 | accept(visitor) | |
| 119 | si | |
| 120 | si | |
| 121 | si |