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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"
struct TypeInfo;
typedef uint32_t (*hash_fn_t)(const void*, const struct TypeInfo*);
typedef int32_t (*compare_fn_t)(const void*, const void*, const struct TypeInfo*);
typedef bool (*equal_fn_t)(const void*, const void*, const struct TypeInfo*);
typedef Text_t (*text_fn_t)(const void*, bool, const struct TypeInfo*);
typedef struct TypeInfo {
int64_t size, align;
struct { // Anonymous tagged union for convenience
enum { CustomInfo, PointerInfo, TextInfo, ArrayInfo, ChannelInfo, TableInfo, FunctionInfo, TypeInfoInfo, OpaqueInfo, EmptyStruct } 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;
bool is_optional;
const struct TypeInfo *pointed;
} PointerInfo;
struct {
const char *lang;
} TextInfo;
struct {
const struct TypeInfo *item;
} ArrayInfo, ChannelInfo;
struct {
const struct TypeInfo *key, *value;
} TableInfo;
struct {
const char *type_str;
} FunctionInfo;
struct {
const char *type_str;
} TypeInfoInfo;
struct {} OpaqueInfo;
struct {
const char *name;
} EmptyStruct;
};
};
} TypeInfo;
#define $PointerInfo(sigil_expr, pointed_info, opt) &((TypeInfo){.size=sizeof(void*), .align=__alignof__(void*), \
.tag=PointerInfo, .PointerInfo={.sigil=sigil_expr, .pointed=pointed_info, .is_optional=opt}})
#define $ArrayInfo(item_info) &((TypeInfo){.size=sizeof(array_t), .align=__alignof__(array_t), \
.tag=ArrayInfo, .ArrayInfo.item=item_info})
#define $SetInfo(item_info) &((TypeInfo){.size=sizeof(table_t), .align=__alignof__(table_t), \
.tag=TableInfo, .TableInfo.key=item_info, .TableInfo.value=&$Void})
#define $ChannelInfo(item_info) &((TypeInfo){.size=sizeof(channel_t), .align=__alignof__(channel_t), \
.tag=ChannelInfo, .ChannelInfo.item=item_info})
#define $TableInfo(key_expr, value_expr) &((TypeInfo){.size=sizeof(table_t), .align=__alignof__(table_t), \
.tag=TableInfo, .TableInfo.key=key_expr, .TableInfo.value=value_expr})
#define $FunctionInfo(typestr) &((TypeInfo){.size=sizeof(void*), .align=__alignof__(void*), \
.tag=FunctionInfo, .FunctionInfo.type_str=typestr})
#define $ClosureInfo(typestr) &((TypeInfo){.size=sizeof(void*[2]), .align=__alignof__(void*), \
.tag=FunctionInfo, .FunctionInfo.type_str=typestr})
#define $TypeInfoInfo(typestr) &((TypeInfo){.size=sizeof(TypeInfo), .align=__alignof__(TypeInfo), \
.tag=TypeInfoInfo, .TypeInfoInfo.type_str=typestr})
extern const TypeInfo $TypeInfo;
extern const TypeInfo $Void;
extern const TypeInfo $Abort;
#define Void_t void
Text_t Type$as_text(const void *typeinfo, bool colorize, const TypeInfo *type);
Text_t Func$as_text(const void *fn, bool colorize, const TypeInfo *type);
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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