mirror of
https://github.com/golang/go
synced 2024-10-04 12:21:26 -06:00
6adadeb3ab
declarations. R=rsc APPROVED=rsc DELTA=587 (519 added, 21 deleted, 47 changed) OCL=32754 CL=32788
628 lines
9.1 KiB
Go
628 lines
9.1 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package eval
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import (
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"bignum";
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"eval";
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"fmt";
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)
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/*
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* Bool
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*/
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type boolV bool
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func (v *boolV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *boolV) Assign(o Value) {
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*v = boolV(o.(BoolValue).Get());
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}
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func (v *boolV) Get() bool {
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return bool(*v);
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}
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func (v *boolV) Set(x bool) {
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*v = boolV(x);
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}
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func (t *boolType) Zero() Value {
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res := boolV(false);
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return &res;
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}
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/*
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* Uint
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*/
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type uint8V uint8
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func (v *uint8V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uint8V) Assign(o Value) {
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*v = uint8V(o.(UintValue).Get());
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}
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func (v *uint8V) Get() uint64 {
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return uint64(*v);
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}
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func (v *uint8V) Set(x uint64) {
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*v = uint8V(x);
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}
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type uint16V uint16
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func (v *uint16V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uint16V) Assign(o Value) {
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*v = uint16V(o.(UintValue).Get());
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}
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func (v *uint16V) Get() uint64 {
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return uint64(*v);
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}
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func (v *uint16V) Set(x uint64) {
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*v = uint16V(x);
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}
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type uint32V uint32
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func (v *uint32V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uint32V) Assign(o Value) {
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*v = uint32V(o.(UintValue).Get());
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}
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func (v *uint32V) Get() uint64 {
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return uint64(*v);
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}
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func (v *uint32V) Set(x uint64) {
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*v = uint32V(x);
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}
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type uint64V uint64
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func (v *uint64V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uint64V) Assign(o Value) {
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*v = uint64V(o.(UintValue).Get());
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}
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func (v *uint64V) Get() uint64 {
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return uint64(*v);
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}
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func (v *uint64V) Set(x uint64) {
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*v = uint64V(x);
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}
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type uintV uint
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func (v *uintV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uintV) Assign(o Value) {
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*v = uintV(o.(UintValue).Get());
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}
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func (v *uintV) Get() uint64 {
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return uint64(*v);
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}
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func (v *uintV) Set(x uint64) {
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*v = uintV(x);
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}
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type uintptrV uintptr
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func (v *uintptrV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *uintptrV) Assign(o Value) {
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*v = uintptrV(o.(UintValue).Get());
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}
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func (v *uintptrV) Get() uint64 {
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return uint64(*v);
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}
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func (v *uintptrV) Set(x uint64) {
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*v = uintptrV(x);
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}
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func (t *uintType) Zero() Value {
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switch t.Bits {
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case 0:
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if t.Ptr {
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res := uintptrV(0);
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return &res;
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} else {
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res := uintV(0);
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return &res;
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}
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case 8:
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res := uint8V(0);
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return &res;
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case 16:
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res := uint16V(0);
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return &res;
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case 32:
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res := uint32V(0);
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return &res;
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case 64:
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res := uint64V(0);
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return &res;
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}
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panic("unexpected uint bit count: ", t.Bits);
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}
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/*
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* Int
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*/
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type int8V int8
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func (v *int8V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *int8V) Assign(o Value) {
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*v = int8V(o.(IntValue).Get());
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}
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func (v *int8V) Get() int64 {
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return int64(*v);
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}
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func (v *int8V) Set(x int64) {
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*v = int8V(x);
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}
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type int16V int16
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func (v *int16V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *int16V) Assign(o Value) {
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*v = int16V(o.(IntValue).Get());
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}
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func (v *int16V) Get() int64 {
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return int64(*v);
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}
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func (v *int16V) Set(x int64) {
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*v = int16V(x);
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}
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type int32V int32
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func (v *int32V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *int32V) Assign(o Value) {
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*v = int32V(o.(IntValue).Get());
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}
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func (v *int32V) Get() int64 {
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return int64(*v);
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}
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func (v *int32V) Set(x int64) {
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*v = int32V(x);
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}
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type int64V int64
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func (v *int64V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *int64V) Assign(o Value) {
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*v = int64V(o.(IntValue).Get());
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}
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func (v *int64V) Get() int64 {
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return int64(*v);
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}
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func (v *int64V) Set(x int64) {
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*v = int64V(x);
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}
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type intV int
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func (v *intV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *intV) Assign(o Value) {
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*v = intV(o.(IntValue).Get());
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}
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func (v *intV) Get() int64 {
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return int64(*v);
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}
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func (v *intV) Set(x int64) {
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*v = intV(x);
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}
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func (t *intType) Zero() Value {
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switch t.Bits {
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case 8:
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res := int8V(0);
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return &res;
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case 16:
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res := int16V(0);
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return &res;
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case 32:
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res := int32V(0);
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return &res;
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case 64:
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res := int64V(0);
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return &res;
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case 0:
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res := intV(0);
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return &res;
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}
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panic("unexpected int bit count: ", t.Bits);
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}
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/*
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* Ideal int
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*/
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type idealIntV struct {
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V *bignum.Integer;
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}
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func (v *idealIntV) String() string {
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return v.V.String();
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}
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func (v *idealIntV) Assign(o Value) {
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v.V = o.(IdealIntValue).Get();
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}
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func (v *idealIntV) Get() *bignum.Integer {
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return v.V;
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}
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func (t *idealIntType) Zero() Value {
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return &idealIntV{bignum.Int(0)};
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}
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/*
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* Float
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*/
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type float32V float32
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func (v *float32V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *float32V) Assign(o Value) {
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*v = float32V(o.(FloatValue).Get());
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}
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func (v *float32V) Get() float64 {
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return float64(*v);
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}
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func (v *float32V) Set(x float64) {
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*v = float32V(x);
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}
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type float64V float64
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func (v *float64V) String() string {
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return fmt.Sprint(*v);
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}
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func (v *float64V) Assign(o Value) {
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*v = float64V(o.(FloatValue).Get());
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}
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func (v *float64V) Get() float64 {
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return float64(*v);
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}
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func (v *float64V) Set(x float64) {
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*v = float64V(x);
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}
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type floatV float
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func (v *floatV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *floatV) Assign(o Value) {
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*v = floatV(o.(FloatValue).Get());
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}
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func (v *floatV) Get() float64 {
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return float64(*v);
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}
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func (v *floatV) Set(x float64) {
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*v = floatV(x);
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}
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func (t *floatType) Zero() Value {
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switch t.Bits {
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case 32:
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res := float32V(0);
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return &res;
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case 64:
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res := float64V(0);
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return &res;
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case 0:
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res := floatV(0);
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return &res;
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}
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panic("unexpected float bit count: ", t.Bits);
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}
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/*
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* Ideal float
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*/
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type idealFloatV struct {
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V *bignum.Rational;
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}
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func (v *idealFloatV) String() string {
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return ratToString(v.V);
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}
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func (v *idealFloatV) Assign(o Value) {
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v.V = o.(IdealFloatValue).Get();
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}
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func (v *idealFloatV) Get() *bignum.Rational {
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return v.V;
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}
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func (t *idealFloatType) Zero() Value {
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return &idealFloatV{bignum.Rat(1, 0)};
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}
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/*
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* String
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*/
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type stringV string
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func (v *stringV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *stringV) Assign(o Value) {
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*v = stringV(o.(StringValue).Get());
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}
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func (v *stringV) Get() string {
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return string(*v);
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}
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func (v *stringV) Set(x string) {
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*v = stringV(x);
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}
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func (t *stringType) Zero() Value {
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res := stringV("");
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return &res;
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}
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/*
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* Array
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*/
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type arrayV []Value
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func (v *arrayV) String() string {
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return fmt.Sprint(*v);
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}
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func (v *arrayV) Assign(o Value) {
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oa := o.(ArrayValue);
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l := int64(len(*v));
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for i := int64(0); i < l; i++ {
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(*v)[i].Assign(oa.Elem(i));
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}
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}
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func (v *arrayV) Get() ArrayValue {
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return v;
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}
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func (v *arrayV) Elem(i int64) Value {
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return (*v)[i];
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}
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func (t *ArrayType) Zero() Value {
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res := arrayV(make([]Value, t.Len));
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// TODO(austin) It's unfortunate that each element is
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// separately heap allocated. We could add ZeroArray to
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// everything, though that doesn't help with multidimensional
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// arrays. Or we could do something unsafe. We'll have this
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// same problem with structs.
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for i := int64(0); i < t.Len; i++ {
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res[i] = t.Elem.Zero();
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}
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return &res;
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}
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/*
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* Struct
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*/
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type structV []Value
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// TODO(austin) Should these methods (and arrayV's) be on structV
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// instead of *structV?
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func (v *structV) String() string {
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res := "{";
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for i, v := range *v {
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if i > 0 {
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res += "; ";
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}
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res += v.String();
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}
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return res + "}";
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}
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func (v *structV) Assign(o Value) {
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oa := o.(StructValue);
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l := len(*v);
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for i := 0; i < l; i++ {
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(*v)[i].Assign(oa.Field(i));
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}
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}
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func (v *structV) Get() StructValue {
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return v;
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}
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func (v *structV) Field(i int) Value {
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return (*v)[i];
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}
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func (t *StructType) Zero() Value {
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res := structV(make([]Value, len(t.Elems)));
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for i, f := range t.Elems {
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res[i] = f.Type.Zero();
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}
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return &res;
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}
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/*
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* Pointer
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*/
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type ptrV struct {
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// nil if the pointer is nil
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target Value;
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}
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func (v *ptrV) String() string {
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return "&" + v.target.String();
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}
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func (v *ptrV) Assign(o Value) {
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v.target = o.(PtrValue).Get();
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}
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func (v *ptrV) Get() Value {
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return v.target;
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}
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func (v *ptrV) Set(x Value) {
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v.target = x;
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}
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func (t *PtrType) Zero() Value {
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return &ptrV{nil};
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}
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/*
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* Functions
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*/
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type funcV struct {
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target Func;
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}
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func (v *funcV) String() string {
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// TODO(austin) Rob wants to see the definition
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return "func {...}";
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}
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func (v *funcV) Assign(o Value) {
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v.target = o.(FuncValue).Get();
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}
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func (v *funcV) Get() Func {
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return v.target;
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}
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func (v *funcV) Set(x Func) {
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v.target = x;
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}
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func (t *FuncType) Zero() Value {
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return &funcV{nil};
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}
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/*
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* Multi-values
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*/
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type multiV []Value
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func (v multiV) String() string {
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res := "(";
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for i, v := range v {
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if i > 0 {
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res += ", ";
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}
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res += v.String();
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}
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return res + ")";
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}
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func (v multiV) Assign(o Value) {
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omv := o.(multiV);
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for i := range v {
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v[i].Assign(omv[i]);
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}
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}
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func (t *MultiType) Zero() Value {
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res := make([]Value, len(t.Elems));
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for i, t := range t.Elems {
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res[i] = t.Zero();
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}
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return multiV(res);
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}
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/*
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* Universal constants
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*/
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// TODO(austin) Nothing complains if I accidentally define init with
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// arguments. Is this intentional?
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func init() {
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s := universe;
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true := boolV(true);
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s.DefineConst("true", universePos, BoolType, &true);
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false := boolV(false);
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s.DefineConst("false", universePos, BoolType, &false);
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}
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