Schemer-Runtime

Simple runtime for my simple Scheme compiler Schemer. Used to bootstrap my Scheme library and implement GC via BoehmGC.

The runtime Scheme type is implemented via a tagged union:

typedef enum Type {
    Nil, Int, Float, Char, String, Bool, Cons, Symbol, Vector, Closure, Unspecified
} SType;

typedef struct SObj {
    SType type;
    union {
        struct {
            s64 value;
        } Int;
        struct {
            f64 value;
        } Float;
        struct {
            char value;
        } Char;
        struct {
            char* value;
        } String;
        struct {
            bool value;
        } Bool;
        struct {
            SObj *car;
            SObj *cdr;
        } Cons;
        struct {
            char *value;
        } Symbol;
        struct {
            int size;
            SObj *value;
        } Vector;
        struct {
            u64 iptr;
            SObj *vector;
        } Closure;
    } content;
} SObj;

Following operations are implemented:

• =
• >
• <
• <=
• >=
• +
• -
• *
• /
• cons?
• null?
• cons
• car
• cdr
• list
• length
• vector?
• vector
• make-vector
• make-string
• vector-ref
• vector-set!
• vector-length
• list?
• void?
• promise?
• procedure?
• number?
• integer?
• error
• void
• print
• println
• display
• write
• exit
• halt
• eq?
• eqv?
• equal?
• not