Beispiel #1
0
static value_t fl_integer_valuedp(value_t *args, u_int32_t nargs)
{
    argcount("integer-valued?", nargs, 1);
    value_t v = args[0];
    if (isfixnum(v)) {
        return FL_T;
    }
    else if (iscprim(v)) {
        numerictype_t nt = cp_numtype((cprim_t*)ptr(v));
        if (nt < T_FLOAT)
            return FL_T;
        void *data = cp_data((cprim_t*)ptr(v));
        if (nt == T_FLOAT) {
            float f = *(float*)data;
            if (f < 0) f = -f;
            if (f <= FLT_MAXINT && (float)(int32_t)f == f)
                return FL_T;
        }
        else {
            assert(nt == T_DOUBLE);
            double d = *(double*)data;
            if (d < 0) d = -d;
            if (d <= DBL_MAXINT && (double)(int64_t)d == d)
                return FL_T;
        }
    }
    return FL_F;
}
Beispiel #2
0
static value_t fl_truncate(value_t *args, u_int32_t nargs)
{
    argcount("truncate", nargs, 1);
    if (isfixnum(args[0]))
        return args[0];
    if (iscprim(args[0])) {
        cprim_t *cp = (cprim_t*)ptr(args[0]);
        void *data = cp_data(cp);
        numerictype_t nt = cp_numtype(cp);
        double d;
        if (nt == T_FLOAT)
            d = (double)*(float*)data;
        else if (nt == T_DOUBLE)
            d = *(double*)data;
        else
            return args[0];
        if (d > 0) {
            if (d > (double)U64_MAX)
                return args[0];
            return return_from_uint64((uint64_t)d);
        }
        if (d > (double)S64_MAX || d < (double)S64_MIN)
            return args[0];
        return return_from_int64((int64_t)d);
    }
    type_error("truncate", "number", args[0]);
}
Beispiel #3
0
static value_t fl_integerp(value_t *args, u_int32_t nargs)
{
    argcount("integer?", nargs, 1);
    value_t v = args[0];
    return (isfixnum(v) ||
            (iscprim(v) && cp_numtype((cprim_t*)ptr(v)) < T_FLOAT)) ?
        FL_T : FL_F;
}
Beispiel #4
0
static double todouble(value_t a, char *fname)
{
    if (isfixnum(a))
        return (double)numval(a);
    if (iscprim(a)) {
        cprim_t *cp = (cprim_t*)ptr(a);
        numerictype_t nt = cp_numtype(cp);
        return conv_to_double(cp_data(cp), nt);
    }
    type_error(fname, "number", a);
}
Beispiel #5
0
static value_t fl_fixnum(value_t *args, u_int32_t nargs)
{
    argcount("fixnum", nargs, 1);
    if (isfixnum(args[0])) {
        return args[0];
    }
    else if (iscprim(args[0])) {
        cprim_t *cp = (cprim_t*)ptr(args[0]);
        return fixnum(conv_to_long(cp_data(cp), cp_numtype(cp)));
    }
    type_error("fixnum", "number", args[0]);
}
Beispiel #6
0
static jl_value_t *scm_to_julia_(value_t e)
{
    if (fl_isnumber(e)) {
        if (iscprim(e)) {
            numerictype_t nt = cp_numtype((cprim_t*)ptr(e));
            switch (nt) {
            case T_DOUBLE:
                return (jl_value_t*)jl_box_float64(*(double*)cp_data((cprim_t*)ptr(e)));
            case T_FLOAT:
                return (jl_value_t*)jl_box_float32(*(float*)cp_data((cprim_t*)ptr(e)));
            case T_INT64:
                return (jl_value_t*)jl_box_int64(*(int64_t*)cp_data((cprim_t*)ptr(e)));
            case T_UINT8:
                return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data((cprim_t*)ptr(e)));
            case T_UINT16:
                return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data((cprim_t*)ptr(e)));
            case T_UINT32:
                return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data((cprim_t*)ptr(e)));
            case T_UINT64:
                return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data((cprim_t*)ptr(e)));
            default:
                ;
            }
        }
        if (isfixnum(e)) {
            int64_t ne = numval(e);
#ifdef __LP64__
            return (jl_value_t*)jl_box_int64(ne);
#else
            if (ne > S32_MAX || ne < S32_MIN)
                return (jl_value_t*)jl_box_int64(ne);
            return (jl_value_t*)jl_box_int32((int32_t)ne);
#endif
        }
        uint64_t n = toulong(e, "scm_to_julia");
#ifdef __LP64__
        return (jl_value_t*)jl_box_int64((int64_t)n);
#else
        if (n > S32_MAX)
            return (jl_value_t*)jl_box_int64((int64_t)n);
        return (jl_value_t*)jl_box_int32((int32_t)n);
#endif
    }
    if (issymbol(e)) {
        if (!fl_isgensym(e)) {
            char *sn = symbol_name(e);
            if (!strcmp(sn, "true"))
                return jl_true;
            else if (!strcmp(sn, "false"))
                return jl_false;
        }
        return (jl_value_t*)scmsym_to_julia(e);
    }
    if (fl_isstring(e)) {
        return jl_pchar_to_string(cvalue_data(e), cvalue_len(e));
    }
    if (e == FL_F) {
        return jl_false;
    }
    if (e == FL_T) {
        return jl_true;
    }
    if (e == FL_NIL) {
        return (jl_value_t*)jl_null;
    }
    if (iscons(e)) {
        value_t hd = car_(e);
        if (issymbol(hd)) {
            jl_sym_t *sym = scmsym_to_julia(hd);
            /* tree node types:
               goto  gotoifnot  label  return
               lambda  call  =  quote
               null  top  method
               body  file new
               line  enter  leave
            */
            size_t n = llength(e)-1;
            size_t i;
            if (sym == lambda_sym) {
                jl_expr_t *ex = jl_exprn(lambda_sym, n);
                e = cdr_(e);
                value_t largs = car_(e);
                jl_cellset(ex->args, 0, full_list(largs));
                e = cdr_(e);
                
                value_t ee = car_(e);
                jl_array_t *vinf = jl_alloc_cell_1d(3);
                jl_cellset(vinf, 0, full_list(car_(ee)));
                ee = cdr_(ee);
                jl_cellset(vinf, 1, full_list_of_lists(car_(ee)));
                ee = cdr_(ee);
                jl_cellset(vinf, 2, full_list_of_lists(car_(ee)));
                assert(!iscons(cdr_(ee)));
                jl_cellset(ex->args, 1, vinf);
                e = cdr_(e);
                
                for(i=2; i < n; i++) {
                    assert(iscons(e));
                    jl_cellset(ex->args, i, scm_to_julia_(car_(e)));
                    e = cdr_(e);
                }
                return
                    (jl_value_t*)jl_new_lambda_info((jl_value_t*)ex, jl_null);
            }

            e = cdr_(e);
            if (sym == line_sym && n==1) {
                return jl_new_struct(jl_linenumbernode_type,
                                     scm_to_julia_(car_(e)));
            }
            if (sym == label_sym) {
                return jl_new_struct(jl_labelnode_type,
                                     scm_to_julia_(car_(e)));
            }
            if (sym == goto_sym) {
                return jl_new_struct(jl_gotonode_type,
                                     scm_to_julia_(car_(e)));
            }
            if (sym == quote_sym) {
                return jl_new_struct(jl_quotenode_type,
                                     scm_to_julia_(car_(e)));
            }
            if (sym == top_sym) {
                return jl_new_struct(jl_topnode_type,
                                     scm_to_julia_(car_(e)));
            }
            jl_expr_t *ex = jl_exprn(sym, n);
            for(i=0; i < n; i++) {
                assert(iscons(e));
                jl_cellset(ex->args, i, scm_to_julia_(car_(e)));
                e = cdr_(e);
            }
            return (jl_value_t*)ex;
        }
        else {
            jl_error("malformed tree");
        }
    }
    if (iscprim(e) && cp_class((cprim_t*)ptr(e))==wchartype) {
        jl_value_t *wc =
            jl_box32(jl_char_type, *(int32_t*)cp_data((cprim_t*)ptr(e)));
        return wc;
    }
    if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jvtype) {
        return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
    }
    jl_error("malformed tree");
    
    return (jl_value_t*)jl_null;
}
Beispiel #7
0
static jl_value_t *scm_to_julia_(fl_context_t *fl_ctx, value_t e, jl_module_t *mod)
{
    if (fl_isnumber(fl_ctx, e)) {
        int64_t i64;
        if (isfixnum(e)) {
            i64 = numval(e);
        }
        else {
            assert(iscprim(e));
            cprim_t *cp = (cprim_t*)ptr(e);
            numerictype_t nt = cp_numtype(cp);
            switch (nt) {
            case T_DOUBLE:
                return (jl_value_t*)jl_box_float64(*(double*)cp_data(cp));
            case T_FLOAT:
                return (jl_value_t*)jl_box_float32(*(float*)cp_data(cp));
            case T_UINT8:
                return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data(cp));
            case T_UINT16:
                return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data(cp));
            case T_UINT32:
                return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data(cp));
            case T_UINT64:
                return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data(cp));
            default:
                ;
            }
            i64 = conv_to_int64(cp_data(cp), nt);
        }
#ifdef _P64
        return (jl_value_t*)jl_box_int64(i64);
#else
        if (i64 > (int64_t)S32_MAX || i64 < (int64_t)S32_MIN)
            return (jl_value_t*)jl_box_int64(i64);
        else
            return (jl_value_t*)jl_box_int32((int32_t)i64);
#endif
    }
    if (issymbol(e)) {
        if (e == jl_ast_ctx(fl_ctx)->true_sym)
            return jl_true;
        else if (e == jl_ast_ctx(fl_ctx)->false_sym)
            return jl_false;
        return (jl_value_t*)scmsym_to_julia(fl_ctx, e);
    }
    if (fl_isstring(fl_ctx, e))
        return jl_pchar_to_string((char*)cvalue_data(e), cvalue_len(e));
    if (iscons(e) || e == fl_ctx->NIL) {
        value_t hd;
        jl_sym_t *sym;
        if (e == fl_ctx->NIL) {
            hd = e;
        }
        else {
            hd = car_(e);
            if (hd == jl_ast_ctx(fl_ctx)->ssavalue_sym)
                return jl_box_ssavalue(numval(car_(cdr_(e))));
            else if (hd == jl_ast_ctx(fl_ctx)->slot_sym)
                return jl_box_slotnumber(numval(car_(cdr_(e))));
            else if (hd == jl_ast_ctx(fl_ctx)->null_sym && llength(e) == 1)
                return jl_nothing;
        }
        if (issymbol(hd))
            sym = scmsym_to_julia(fl_ctx, hd);
        else
            sym = list_sym;
        size_t n = llength(e)-1;
        if (issymbol(hd))
            e = cdr_(e);
        else
            n++;
        // nodes with special representations
        jl_value_t *ex = NULL, *temp = NULL;
        if (sym == line_sym && (n == 1 || n == 2)) {
            jl_value_t *linenum = scm_to_julia_(fl_ctx, car_(e), mod);
            jl_value_t *file = jl_nothing;
            JL_GC_PUSH2(&linenum, &file);
            if (n == 2)
                file = scm_to_julia_(fl_ctx, car_(cdr_(e)), mod);
            temp = jl_new_struct(jl_linenumbernode_type, linenum, file);
            JL_GC_POP();
            return temp;
        }
        JL_GC_PUSH1(&ex);
        if (sym == label_sym) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            temp = jl_new_struct(jl_labelnode_type, ex);
        }
        else if (sym == goto_sym) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            temp = jl_new_struct(jl_gotonode_type, ex);
        }
        else if (sym == newvar_sym) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            temp = jl_new_struct(jl_newvarnode_type, ex);
        }
        else if (sym == globalref_sym) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            temp = scm_to_julia_(fl_ctx, car_(cdr_(e)), mod);
            assert(jl_is_module(ex));
            assert(jl_is_symbol(temp));
            temp = jl_module_globalref((jl_module_t*)ex, (jl_sym_t*)temp);
        }
        else if (sym == top_sym) {
            assert(mod && "top should not be generated by the parser");
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            assert(jl_is_symbol(ex));
            temp = jl_module_globalref(jl_base_relative_to(mod), (jl_sym_t*)ex);
        }
        else if (sym == core_sym) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            assert(jl_is_symbol(ex));
            temp = jl_module_globalref(jl_core_module, (jl_sym_t*)ex);
        }
        else if (sym == inert_sym || (sym == quote_sym && (!iscons(car_(e))))) {
            ex = scm_to_julia_(fl_ctx, car_(e), mod);
            temp = jl_new_struct(jl_quotenode_type, ex);
        }
        if (temp) {
            JL_GC_POP();
            return temp;
        }
        ex = (jl_value_t*)jl_exprn(sym, n);
        size_t i;
        for (i = 0; i < n; i++) {
            assert(iscons(e));
            jl_array_ptr_set(((jl_expr_t*)ex)->args, i, scm_to_julia_(fl_ctx, car_(e), mod));
            e = cdr_(e);
        }
        if (sym == lambda_sym)
            ex = (jl_value_t*)jl_new_code_info_from_ast((jl_expr_t*)ex);
        JL_GC_POP();
        if (sym == list_sym)
            return (jl_value_t*)((jl_expr_t*)ex)->args;
        return (jl_value_t*)ex;
    }
    if (iscprim(e) && cp_class((cprim_t*)ptr(e)) == fl_ctx->wchartype) {
        uint32_t c, u = *(uint32_t*)cp_data((cprim_t*)ptr(e));
        if (u < 0x80) {
            c = u << 24;
        } else {
            c = ((u << 0) & 0x0000003f) | ((u << 2) & 0x00003f00) |
                ((u << 4) & 0x003f0000) | ((u << 6) & 0x3f000000);
            c = u < 0x00000800 ? (c << 16) | 0xc0800000 :
                u < 0x00010000 ? (c <<  8) | 0xe0808000 :
                                 (c <<  0) | 0xf0808080 ;
        }
        return jl_box_char(c);
    }
    if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jl_ast_ctx(fl_ctx)->jvtype) {
        return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
    }
    jl_error("malformed tree");
}
Beispiel #8
0
// *oob: output argument, means we hit the limit specified by 'bound'
static uptrint_t bounded_hash(value_t a, int bound, int *oob)
{
    *oob = 0;
    union {
        double d;
        int64_t i64;
    } u;
    numerictype_t nt;
    size_t i, len;
    cvalue_t *cv;
    cprim_t *cp;
    void *data;
    uptrint_t h = 0;
    int oob2, tg = tag(a);
    switch(tg) {
    case TAG_NUM :
    case TAG_NUM1:
        u.d = (double)numval(a);
        return doublehash(u.i64);
    case TAG_FUNCTION:
        if (uintval(a) > N_BUILTINS)
            return bounded_hash(((function_t*)ptr(a))->bcode, bound, oob);
        return inthash(a);
    case TAG_SYM:
        return ((symbol_t*)ptr(a))->hash;
    case TAG_CPRIM:
        cp = (cprim_t*)ptr(a);
        data = cp_data(cp);
        if (cp_class(cp) == wchartype)
            return inthash(*(int32_t*)data);
        nt = cp_numtype(cp);
        u.d = conv_to_double(data, nt);
        return doublehash(u.i64);
    case TAG_CVALUE:
        cv = (cvalue_t*)ptr(a);
        data = cv_data(cv);
        return memhash(data, cv_len(cv));

    case TAG_VECTOR:
        if (bound <= 0) {
            *oob = 1;
            return 1;
        }
        len = vector_size(a);
        for(i=0; i < len; i++) {
            h = MIX(h, bounded_hash(vector_elt(a,i), bound/2, &oob2)^1);
            if (oob2)
                bound/=2;
            *oob = *oob || oob2;
        }
        return h;

    case TAG_CONS:
        do {
            if (bound <= 0) {
                *oob = 1;
                return h;
            }
            h = MIX(h, bounded_hash(car_(a), bound/2, &oob2));
            // bounds balancing: try to share the bounds efficiently
            // so we can hash better when a list is cdr-deep (a common case)
            if (oob2)
                bound/=2;
            else
                bound--;
            // recursive OOB propagation. otherwise this case is slow:
            // (hash '#2=((#0=(#1=(#1#) . #0#)) . #2#))
            *oob = *oob || oob2;
            a = cdr_(a);
        } while (iscons(a));
        h = MIX(h, bounded_hash(a, bound-1, &oob2)^2);
        *oob = *oob || oob2;
        return h;
    }
    return 0;
}
Beispiel #9
0
static jl_value_t *scm_to_julia_(value_t e, int eo)
{
    if (fl_isnumber(e)) {
        int64_t i64;
        if (isfixnum(e)) {
            i64 = numval(e);
        }
        else {
            assert(iscprim(e));
            cprim_t *cp = (cprim_t*)ptr(e);
            numerictype_t nt = cp_numtype(cp);
            switch (nt) {
            case T_DOUBLE:
                return (jl_value_t*)jl_box_float64(*(double*)cp_data(cp));
            case T_FLOAT:
                return (jl_value_t*)jl_box_float32(*(float*)cp_data(cp));
            case T_UINT8:
                return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data(cp));
            case T_UINT16:
                return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data(cp));
            case T_UINT32:
                return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data(cp));
            case T_UINT64:
                return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data(cp));
            default:
                ;
            }
            i64 = conv_to_int64(cp_data(cp), nt);
        }
        if (
#ifdef _P64
            jl_compileropts.int_literals==32
#else
            jl_compileropts.int_literals!=64
#endif
            ) {
            if (i64 > (int64_t)S32_MAX || i64 < (int64_t)S32_MIN)
                return (jl_value_t*)jl_box_int64(i64);
            return (jl_value_t*)jl_box_int32((int32_t)i64);
        }
        else {
            return (jl_value_t*)jl_box_int64(i64);
        }
    }
    if (issymbol(e)) {
        if (e == true_sym)
            return jl_true;
        else if (e == false_sym)
            return jl_false;
        return (jl_value_t*)scmsym_to_julia(e);
    }
    if (fl_isstring(e)) {
        return jl_pchar_to_string((char*)cvalue_data(e), cvalue_len(e));
    }
    if (e == FL_F) {
        return jl_false;
    }
    if (e == FL_T) {
        return jl_true;
    }
    if (e == FL_NIL) {
        return (jl_value_t*)jl_null;
    }
    if (iscons(e)) {
        value_t hd = car_(e);
        if (issymbol(hd)) {
            jl_sym_t *sym = scmsym_to_julia(hd);
            /* tree node types:
               goto  gotoifnot  label  return
               lambda  call  =  quote
               null  top  method
               body  file new
               line  enter  leave
            */
            size_t n = llength(e)-1;
            size_t i;
            if (sym == null_sym && n == 0)
                return jl_nothing;
            if (sym == lambda_sym) {
                jl_expr_t *ex = jl_exprn(lambda_sym, n);
                e = cdr_(e);
                value_t largs = car_(e);
                jl_cellset(ex->args, 0, full_list(largs,eo));
                e = cdr_(e);
                
                value_t ee = car_(e);
                jl_array_t *vinf = jl_alloc_cell_1d(3);
                jl_cellset(vinf, 0, full_list(car_(ee),eo));
                ee = cdr_(ee);
                jl_cellset(vinf, 1, full_list_of_lists(car_(ee),eo));
                ee = cdr_(ee);
                jl_cellset(vinf, 2, full_list_of_lists(car_(ee),eo));
                assert(!iscons(cdr_(ee)));
                jl_cellset(ex->args, 1, vinf);
                e = cdr_(e);
                
                for(i=2; i < n; i++) {
                    assert(iscons(e));
                    jl_cellset(ex->args, i, scm_to_julia_(car_(e), eo));
                    e = cdr_(e);
                }
                return
                    (jl_value_t*)jl_new_lambda_info((jl_value_t*)ex, jl_null);
            }

            e = cdr_(e);
            if (!eo) {
                if (sym == line_sym && n==1) {
                    return jl_new_struct(jl_linenumbernode_type,
                                         scm_to_julia_(car_(e),0));
                }
                if (sym == label_sym) {
                    return jl_new_struct(jl_labelnode_type,
                                         scm_to_julia_(car_(e),0));
                }
                if (sym == goto_sym) {
                    return jl_new_struct(jl_gotonode_type,
                                         scm_to_julia_(car_(e),0));
                }
                if (sym == quote_sym) {
                    return jl_new_struct(jl_quotenode_type,
                                         scm_to_julia_(car_(e),0));
                }
                if (sym == top_sym) {
                    return jl_new_struct(jl_topnode_type,
                                         scm_to_julia_(car_(e),0));
                }
                if (sym == newvar_sym) {
                    return jl_new_struct(jl_newvarnode_type,
                                         scm_to_julia_(car_(e),0));
                }
            }
            jl_expr_t *ex = jl_exprn(sym, n);
            // allocate a fresh args array for empty exprs passed to macros
            if (eo && n == 0)
                ex->args = jl_alloc_cell_1d(0);
            for(i=0; i < n; i++) {
                assert(iscons(e));
                jl_cellset(ex->args, i, scm_to_julia_(car_(e),eo));
                e = cdr_(e);
            }
            return (jl_value_t*)ex;
        }
        else {
            jl_error("malformed tree");
        }
    }
    if (iscprim(e) && cp_class((cprim_t*)ptr(e))==wchartype) {
        jl_value_t *wc =
            jl_box32(jl_char_type, *(int32_t*)cp_data((cprim_t*)ptr(e)));
        return wc;
    }
    if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jvtype) {
        return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
    }
    jl_error("malformed tree");
    
    return (jl_value_t*)jl_null;
}
Beispiel #10
0
static jl_value_t *scm_to_julia_(fl_context_t *fl_ctx, value_t e, int eo)
{
    if (fl_isnumber(fl_ctx, e)) {
        int64_t i64;
        if (isfixnum(e)) {
            i64 = numval(e);
        }
        else {
            assert(iscprim(e));
            cprim_t *cp = (cprim_t*)ptr(e);
            numerictype_t nt = cp_numtype(cp);
            switch (nt) {
            case T_DOUBLE:
                return (jl_value_t*)jl_box_float64(*(double*)cp_data(cp));
            case T_FLOAT:
                return (jl_value_t*)jl_box_float32(*(float*)cp_data(cp));
            case T_UINT8:
                return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data(cp));
            case T_UINT16:
                return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data(cp));
            case T_UINT32:
                return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data(cp));
            case T_UINT64:
                return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data(cp));
            default:
                ;
            }
            i64 = conv_to_int64(cp_data(cp), nt);
        }
#ifdef _P64
        return (jl_value_t*)jl_box_int64(i64);
#else
        if (i64 > (int64_t)S32_MAX || i64 < (int64_t)S32_MIN)
            return (jl_value_t*)jl_box_int64(i64);
        else
            return (jl_value_t*)jl_box_int32((int32_t)i64);
#endif
    }
    if (issymbol(e)) {
        if (e == jl_ast_ctx(fl_ctx)->true_sym)
            return jl_true;
        else if (e == jl_ast_ctx(fl_ctx)->false_sym)
            return jl_false;
        return (jl_value_t*)scmsym_to_julia(fl_ctx, e);
    }
    if (fl_isstring(fl_ctx, e))
        return jl_pchar_to_string((char*)cvalue_data(e), cvalue_len(e));
    if (iscons(e) || e == fl_ctx->NIL) {
        value_t hd;
        jl_sym_t *sym;
        if (e == fl_ctx->NIL) {
            hd = e;
        }
        else {
            hd = car_(e);
            if (hd == jl_ast_ctx(fl_ctx)->ssavalue_sym)
                return jl_box_ssavalue(numval(car_(cdr_(e))));
            else if (hd == jl_ast_ctx(fl_ctx)->slot_sym)
                return jl_box_slotnumber(numval(car_(cdr_(e))));
            else if (hd == jl_ast_ctx(fl_ctx)->null_sym && llength(e) == 1)
                return jl_nothing;
        }
        if (issymbol(hd))
            sym = scmsym_to_julia(fl_ctx, hd);
        else
            sym = list_sym;
        size_t n = llength(e)-1;
        if (issymbol(hd))
            e = cdr_(e);
        else
            n++;
        if (!eo) {
            if (sym == line_sym && n==1) {
                jl_value_t *linenum = scm_to_julia_(fl_ctx, car_(e), 0);
                JL_GC_PUSH1(&linenum);
                jl_value_t *temp = jl_new_struct(jl_linenumbernode_type, linenum);
                JL_GC_POP();
                return temp;
            }
            jl_value_t *scmv = NULL, *temp = NULL;
            JL_GC_PUSH1(&scmv);
            if (sym == label_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                temp = jl_new_struct(jl_labelnode_type, scmv);
                JL_GC_POP();
                return temp;
            }
            if (sym == goto_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                temp = jl_new_struct(jl_gotonode_type, scmv);
                JL_GC_POP();
                return temp;
            }
            if (sym == inert_sym || (sym == quote_sym && (!iscons(car_(e))))) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                temp = jl_new_struct(jl_quotenode_type, scmv);
                JL_GC_POP();
                return temp;
            }
            if (sym == top_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                assert(jl_is_symbol(scmv));
                temp = jl_module_globalref(jl_base_relative_to(jl_current_module), (jl_sym_t*)scmv);
                JL_GC_POP();
                return temp;
            }
            if (sym == core_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                assert(jl_is_symbol(scmv));
                temp = jl_module_globalref(jl_core_module, (jl_sym_t*)scmv);
                JL_GC_POP();
                return temp;
            }
            if (sym == globalref_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                temp = scm_to_julia_(fl_ctx,car_(cdr_(e)),0);
                assert(jl_is_module(scmv));
                assert(jl_is_symbol(temp));
                temp = jl_module_globalref((jl_module_t*)scmv, (jl_sym_t*)temp);
                JL_GC_POP();
                return temp;
            }
            if (sym == newvar_sym) {
                scmv = scm_to_julia_(fl_ctx,car_(e),0);
                temp = jl_new_struct(jl_newvarnode_type, scmv);
                JL_GC_POP();
                return temp;
            }
            JL_GC_POP();
        }
        else if (sym == inert_sym && !iscons(car_(e))) {
            sym = quote_sym;
        }
        jl_value_t *ex = (jl_value_t*)jl_exprn(sym, n);
        JL_GC_PUSH1(&ex);
        // allocate a fresh args array for empty exprs passed to macros
        if (eo && n == 0) {
            ((jl_expr_t*)ex)->args = jl_alloc_vec_any(0);
            jl_gc_wb(ex, ((jl_expr_t*)ex)->args);
        }
        size_t i;
        for(i=0; i < n; i++) {
            assert(iscons(e));
            jl_array_ptr_set(((jl_expr_t*)ex)->args, i, scm_to_julia_(fl_ctx, car_(e), eo));
            e = cdr_(e);
        }
        if (sym == lambda_sym)
            ex = (jl_value_t*)jl_new_lambda_info_from_ast((jl_expr_t*)ex);
        JL_GC_POP();
        if (sym == list_sym)
            return (jl_value_t*)((jl_expr_t*)ex)->args;
        return (jl_value_t*)ex;
    }
    if (iscprim(e) && cp_class((cprim_t*)ptr(e)) == fl_ctx->wchartype) {
        return jl_box32(jl_char_type, *(int32_t*)cp_data((cprim_t*)ptr(e)));
    }
    if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jl_ast_ctx(fl_ctx)->jvtype) {
        return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
    }
    jl_error("malformed tree");

    return jl_nothing;
}