48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
#pragma once
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#include <cstdint>
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#define SYMBOL_TABLE_SIZE 2048
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typedef unsigned int symbol_t;
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#define TYPE_SYMBOL 1
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#define TYPE_NUMBER 2
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#define TYPE_STRING 3
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#define TYPE_FLOAT 4
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#define TYPE_LIST 5
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#define symbolp(x) (x->type == TYPE_SYMBOL)
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#define numberp(x) (x->type == TYPE_NUMBER)
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#define stringp(x) (x->type == TYPE_STRING)
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#define floatp(x) (x->type == TYPE_FLOAT)
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#define listp(x) (x->type == TYPE_LIST)
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typedef struct cell {
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uint8_t type;
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union {
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struct {
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cell *head;
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cell *tail;
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};
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struct {
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union {
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symbol_t sym;
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int num;
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char *str;
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float fnum;
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};
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};
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};
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};
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symbol_t intern_symbol(const char *s);
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symbol_t make_symbol(const char *s);
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static auto NIL = make_symbol("nil");
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cell head(cell x);
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cell tail(cell x);
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