hare

[hare] The Hare programming language
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types.ha (2726B)

      1 // License: MPL-2.0
      2 // (c) 2021 Alexey Yerin <yyp@disroot.org>
      3 // (c) 2021 Drew DeVault <sir@cmpwn.com>
      4 // (c) 2021 Ember Sawady <ecs@d2evs.net>
      5 use hare::ast;
      6 
      7 // A type alias.
      8 export type alias = struct {
      9 	id: ast::ident,
     10 	// null for forward referenced types
     11 	secondary: const nullable *_type,
     12 };
     13 
     14 // An array type, e.g. [10]int
     15 export type array = struct {
     16 	// [[SIZE_UNDEFINED]] for [*]type
     17 	length: size,
     18 	member: const *_type,
     19 };
     20 
     21 // A built-in primitive type (int, bool, str, etc).
     22 export type builtin = enum u8 {
     23 	// Keep me consistent with ast::builtin
     24 
     25 	BOOL, F32, F64, FCONST, I16, I32, I64, I8, ICONST, INT, NULL,
     26 	RUNE, SIZE, STR, U16, U32, U64, U8, UINT, UINTPTR, VALIST, VOID,
     27 };
     28 
     29 // An enum type, e.g. enum { FOO = 0 }
     30 export type _enum = struct {
     31 	storage: builtin,
     32 	values: [](str, u64),
     33 };
     34 
     35 // Indicates the variadism of a [[func]]
     36 export type variadism = enum {
     37 	NONE,
     38 	C,
     39 	HARE,
     40 };
     41 
     42 // Indicats if a [[func]] has the @noreturn attribute
     43 export type func_flag = enum uint {
     44 	NONE = 0,
     45 	NORETURN = 1 << 0,
     46 };
     47 
     48 // A function type, e.g. fn(x: int, y: int) int
     49 export type func = struct {
     50 	result: const *_type,
     51 	variadism: variadism,
     52 	flags: func_flag,
     53 	params: []const *_type,
     54 };
     55 
     56 // Flags which apply to a pointer type.
     57 export type pointer_flag = enum u8 {
     58 	// Keep me consistent with ast::pointer_flag
     59 
     60 	NONE = 0,
     61 	NULLABLE = 1 << 0,
     62 };
     63 
     64 // *int
     65 export type pointer = struct {
     66 	referent: const *_type,
     67 	flags: pointer_flag,
     68 };
     69 
     70 // []int
     71 export type slice = const *_type;
     72 
     73 // Indicates if a [[_struct]] was declared as a struct or union type.
     74 export type struct_union = enum {
     75 	STRUCT,
     76 	UNION,
     77 };
     78 
     79 // struct { ... } or union { ... }
     80 //
     81 // Note that embedded anonymous structs will have been merged into their parent
     82 // type.
     83 export type _struct = struct {
     84 	kind: struct_union,
     85 	fields: []struct_field,
     86 };
     87 
     88 // A single struct field.
     89 export type struct_field = struct {
     90 	// "" for an anonymous field
     91 	name: str,
     92 	offs: size,
     93 	_type: const *_type,
     94 };
     95 
     96 // A tagged union type, e.g. (int | uint | void).
     97 export type tagged = []const *_type;
     98 
     99 // A tuple type, e.g. (a, b, c)
    100 export type tuple = []tuple_value;
    101 
    102 // A single value of a tuple type.
    103 export type tuple_value = struct {
    104 	offs: size,
    105 	_type: const *_type,
    106 };
    107 
    108 // Flags for a Hare type.
    109 export type flag = enum u8 {
    110 	// Keep me consistent with ast::type_flag
    111 
    112 	NONE = 0,
    113 	CONST = 1 << 0,
    114 	ERROR = 1 << 1,
    115 };
    116 
    117 // The sz field of [[_type]] is set to this value to indicate that the size of
    118 // the type is undefined.
    119 export def SIZE_UNDEFINED: size = -1: size;
    120 
    121 // A Hare type.
    122 export type _type = struct {
    123 	flags: flag,
    124 	repr: (alias | array | builtin | _enum | func
    125 		| pointer | slice | _struct | tagged | tuple),
    126 	id: u32,
    127 	sz: size,
    128 	_align: size,
    129 };