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#pragma once
// Type information and methods for TypeInfos (i.e. runtime representations of types)
#include <stdbool.h>
#include <stdint.h>
#include "datatypes.h"
typedef struct TypeInfo_s TypeInfo_t;
typedef uint64_t (*hash_fn_t)(const void*, const TypeInfo_t*);
typedef int32_t (*compare_fn_t)(const void*, const void*, const TypeInfo_t*);
typedef bool (*equal_fn_t)(const void*, const void*, const TypeInfo_t*);
typedef Text_t (*text_fn_t)(const void*, bool, const TypeInfo_t*);
typedef struct {
const char *name;
const TypeInfo_t *type;
} NamedType_t;
struct TypeInfo_s {
int64_t size, align;
struct { // Anonymous tagged union for convenience
enum { Invalid, CustomInfo, StructInfo, EnumInfo, PointerInfo, TextInfo, ArrayInfo, ChannelInfo, TableInfo, FunctionInfo,
OptionalInfo, TypeInfoInfo, OpaqueInfo, CStringInfo } tag;
union {
struct {
equal_fn_t equal;
compare_fn_t compare;
hash_fn_t hash;
text_fn_t as_text;
} CustomInfo;
struct {
const char *sigil;
const TypeInfo_t *pointed;
} PointerInfo;
struct {
const char *lang;
} TextInfo;
struct {
const TypeInfo_t *item;
} ArrayInfo, ChannelInfo;
struct {
const TypeInfo_t *key, *value;
} TableInfo;
struct {
const char *type_str;
} FunctionInfo;
struct {
const char *type_str;
} TypeInfoInfo;
struct {
const TypeInfo_t *type;
} OptionalInfo;
#pragma GCC diagnostic ignored "-Wpedantic"
struct {} OpaqueInfo;
struct {
const char *name;
int num_tags;
NamedType_t *tags;
} EnumInfo;
struct {
const char *name;
int num_fields;
bool is_secret:1;
NamedType_t *fields;
} StructInfo;
};
};
};
#define Pointer$info(sigil_expr, pointed_info) &((TypeInfo_t){.size=sizeof(void*), .align=__alignof__(void*), \
.tag=PointerInfo, .PointerInfo={.sigil=sigil_expr, .pointed=pointed_info}})
#define Array$info(item_info) &((TypeInfo_t){.size=sizeof(Array_t), .align=__alignof__(Array_t), \
.tag=ArrayInfo, .ArrayInfo.item=item_info})
#define Set$info(item_info) &((TypeInfo_t){.size=sizeof(Table_t), .align=__alignof__(Table_t), \
.tag=TableInfo, .TableInfo.key=item_info, .TableInfo.value=&Void$info})
#define Channel$info(item_info) &((TypeInfo_t){.size=sizeof(Channel_t), .align=__alignof__(Channel_t), \
.tag=ChannelInfo, .ChannelInfo.item=item_info})
#define Table$info(key_expr, value_expr) &((TypeInfo_t){.size=sizeof(Table_t), .align=__alignof__(Table_t), \
.tag=TableInfo, .TableInfo.key=key_expr, .TableInfo.value=value_expr})
#define Function$info(typestr) &((TypeInfo_t){.size=sizeof(void*), .align=__alignof__(void*), \
.tag=FunctionInfo, .FunctionInfo.type_str=typestr})
#define Closure$info(typestr) &((TypeInfo_t){.size=sizeof(void*[2]), .align=__alignof__(void*), \
.tag=FunctionInfo, .FunctionInfo.type_str=typestr})
#define Type$info(typestr) &((TypeInfo_t){.size=sizeof(TypeInfo_t), .align=__alignof__(TypeInfo_t), \
.tag=TypeInfoInfo, .TypeInfoInfo.type_str=typestr})
#define Optional$info(_size, _align, t) &((TypeInfo_t){.size=_size, .align=_align, \
.tag=OptionalInfo, .OptionalInfo.type=t})
extern const TypeInfo_t Void$info;
extern const TypeInfo_t Abort$info;
#define Void_t void
Text_t Type$as_text(const void *typeinfo, bool colorize, const TypeInfo_t *type);
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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