diff options
Diffstat (limited to 'libgo/go/exp/eval/value.go')
| -rw-r--r-- | libgo/go/exp/eval/value.go | 586 |
1 files changed, 0 insertions, 586 deletions
diff --git a/libgo/go/exp/eval/value.go b/libgo/go/exp/eval/value.go deleted file mode 100644 index daa6918..0000000 --- a/libgo/go/exp/eval/value.go +++ /dev/null @@ -1,586 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package eval - -import ( - "big" - "fmt" -) - -type Value interface { - String() string - // Assign copies another value into this one. It should - // assume that the other value satisfies the same specific - // value interface (BoolValue, etc.), but must not assume - // anything about its specific type. - Assign(t *Thread, o Value) -} - -type BoolValue interface { - Value - Get(*Thread) bool - Set(*Thread, bool) -} - -type UintValue interface { - Value - Get(*Thread) uint64 - Set(*Thread, uint64) -} - -type IntValue interface { - Value - Get(*Thread) int64 - Set(*Thread, int64) -} - -// TODO(austin) IdealIntValue and IdealFloatValue should not exist -// because ideals are not l-values. -type IdealIntValue interface { - Value - Get() *big.Int -} - -type FloatValue interface { - Value - Get(*Thread) float64 - Set(*Thread, float64) -} - -type IdealFloatValue interface { - Value - Get() *big.Rat -} - -type StringValue interface { - Value - Get(*Thread) string - Set(*Thread, string) -} - -type ArrayValue interface { - Value - // TODO(austin) Get() is here for uniformity, but is - // completely useless. If a lot of other types have similarly - // useless Get methods, just special-case these uses. - Get(*Thread) ArrayValue - Elem(*Thread, int64) Value - // Sub returns an ArrayValue backed by the same array that - // starts from element i and has length len. - Sub(i int64, len int64) ArrayValue -} - -type StructValue interface { - Value - // TODO(austin) This is another useless Get() - Get(*Thread) StructValue - Field(*Thread, int) Value -} - -type PtrValue interface { - Value - Get(*Thread) Value - Set(*Thread, Value) -} - -type Func interface { - NewFrame() *Frame - Call(*Thread) -} - -type FuncValue interface { - Value - Get(*Thread) Func - Set(*Thread, Func) -} - -type Interface struct { - Type Type - Value Value -} - -type InterfaceValue interface { - Value - Get(*Thread) Interface - Set(*Thread, Interface) -} - -type Slice struct { - Base ArrayValue - Len, Cap int64 -} - -type SliceValue interface { - Value - Get(*Thread) Slice - Set(*Thread, Slice) -} - -type Map interface { - Len(*Thread) int64 - // Retrieve an element from the map, returning nil if it does - // not exist. - Elem(t *Thread, key interface{}) Value - // Set an entry in the map. If val is nil, delete the entry. - SetElem(t *Thread, key interface{}, val Value) - // TODO(austin) Perhaps there should be an iterator interface instead. - Iter(func(key interface{}, val Value) bool) -} - -type MapValue interface { - Value - Get(*Thread) Map - Set(*Thread, Map) -} - -/* - * Bool - */ - -type boolV bool - -func (v *boolV) String() string { return fmt.Sprint(*v) } - -func (v *boolV) Assign(t *Thread, o Value) { *v = boolV(o.(BoolValue).Get(t)) } - -func (v *boolV) Get(*Thread) bool { return bool(*v) } - -func (v *boolV) Set(t *Thread, x bool) { *v = boolV(x) } - -/* - * Uint - */ - -type uint8V uint8 - -func (v *uint8V) String() string { return fmt.Sprint(*v) } - -func (v *uint8V) Assign(t *Thread, o Value) { *v = uint8V(o.(UintValue).Get(t)) } - -func (v *uint8V) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uint8V) Set(t *Thread, x uint64) { *v = uint8V(x) } - -type uint16V uint16 - -func (v *uint16V) String() string { return fmt.Sprint(*v) } - -func (v *uint16V) Assign(t *Thread, o Value) { *v = uint16V(o.(UintValue).Get(t)) } - -func (v *uint16V) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uint16V) Set(t *Thread, x uint64) { *v = uint16V(x) } - -type uint32V uint32 - -func (v *uint32V) String() string { return fmt.Sprint(*v) } - -func (v *uint32V) Assign(t *Thread, o Value) { *v = uint32V(o.(UintValue).Get(t)) } - -func (v *uint32V) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uint32V) Set(t *Thread, x uint64) { *v = uint32V(x) } - -type uint64V uint64 - -func (v *uint64V) String() string { return fmt.Sprint(*v) } - -func (v *uint64V) Assign(t *Thread, o Value) { *v = uint64V(o.(UintValue).Get(t)) } - -func (v *uint64V) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uint64V) Set(t *Thread, x uint64) { *v = uint64V(x) } - -type uintV uint - -func (v *uintV) String() string { return fmt.Sprint(*v) } - -func (v *uintV) Assign(t *Thread, o Value) { *v = uintV(o.(UintValue).Get(t)) } - -func (v *uintV) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uintV) Set(t *Thread, x uint64) { *v = uintV(x) } - -type uintptrV uintptr - -func (v *uintptrV) String() string { return fmt.Sprint(*v) } - -func (v *uintptrV) Assign(t *Thread, o Value) { *v = uintptrV(o.(UintValue).Get(t)) } - -func (v *uintptrV) Get(*Thread) uint64 { return uint64(*v) } - -func (v *uintptrV) Set(t *Thread, x uint64) { *v = uintptrV(x) } - -/* - * Int - */ - -type int8V int8 - -func (v *int8V) String() string { return fmt.Sprint(*v) } - -func (v *int8V) Assign(t *Thread, o Value) { *v = int8V(o.(IntValue).Get(t)) } - -func (v *int8V) Get(*Thread) int64 { return int64(*v) } - -func (v *int8V) Set(t *Thread, x int64) { *v = int8V(x) } - -type int16V int16 - -func (v *int16V) String() string { return fmt.Sprint(*v) } - -func (v *int16V) Assign(t *Thread, o Value) { *v = int16V(o.(IntValue).Get(t)) } - -func (v *int16V) Get(*Thread) int64 { return int64(*v) } - -func (v *int16V) Set(t *Thread, x int64) { *v = int16V(x) } - -type int32V int32 - -func (v *int32V) String() string { return fmt.Sprint(*v) } - -func (v *int32V) Assign(t *Thread, o Value) { *v = int32V(o.(IntValue).Get(t)) } - -func (v *int32V) Get(*Thread) int64 { return int64(*v) } - -func (v *int32V) Set(t *Thread, x int64) { *v = int32V(x) } - -type int64V int64 - -func (v *int64V) String() string { return fmt.Sprint(*v) } - -func (v *int64V) Assign(t *Thread, o Value) { *v = int64V(o.(IntValue).Get(t)) } - -func (v *int64V) Get(*Thread) int64 { return int64(*v) } - -func (v *int64V) Set(t *Thread, x int64) { *v = int64V(x) } - -type intV int - -func (v *intV) String() string { return fmt.Sprint(*v) } - -func (v *intV) Assign(t *Thread, o Value) { *v = intV(o.(IntValue).Get(t)) } - -func (v *intV) Get(*Thread) int64 { return int64(*v) } - -func (v *intV) Set(t *Thread, x int64) { *v = intV(x) } - -/* - * Ideal int - */ - -type idealIntV struct { - V *big.Int -} - -func (v *idealIntV) String() string { return v.V.String() } - -func (v *idealIntV) Assign(t *Thread, o Value) { - v.V = o.(IdealIntValue).Get() -} - -func (v *idealIntV) Get() *big.Int { return v.V } - -/* - * Float - */ - -type float32V float32 - -func (v *float32V) String() string { return fmt.Sprint(*v) } - -func (v *float32V) Assign(t *Thread, o Value) { *v = float32V(o.(FloatValue).Get(t)) } - -func (v *float32V) Get(*Thread) float64 { return float64(*v) } - -func (v *float32V) Set(t *Thread, x float64) { *v = float32V(x) } - -type float64V float64 - -func (v *float64V) String() string { return fmt.Sprint(*v) } - -func (v *float64V) Assign(t *Thread, o Value) { *v = float64V(o.(FloatValue).Get(t)) } - -func (v *float64V) Get(*Thread) float64 { return float64(*v) } - -func (v *float64V) Set(t *Thread, x float64) { *v = float64V(x) } - -/* - * Ideal float - */ - -type idealFloatV struct { - V *big.Rat -} - -func (v *idealFloatV) String() string { return v.V.FloatString(6) } - -func (v *idealFloatV) Assign(t *Thread, o Value) { - v.V = o.(IdealFloatValue).Get() -} - -func (v *idealFloatV) Get() *big.Rat { return v.V } - -/* - * String - */ - -type stringV string - -func (v *stringV) String() string { return fmt.Sprint(*v) } - -func (v *stringV) Assign(t *Thread, o Value) { *v = stringV(o.(StringValue).Get(t)) } - -func (v *stringV) Get(*Thread) string { return string(*v) } - -func (v *stringV) Set(t *Thread, x string) { *v = stringV(x) } - -/* - * Array - */ - -type arrayV []Value - -func (v *arrayV) String() string { - res := "{" - for i, e := range *v { - if i > 0 { - res += ", " - } - res += e.String() - } - return res + "}" -} - -func (v *arrayV) Assign(t *Thread, o Value) { - oa := o.(ArrayValue) - l := int64(len(*v)) - for i := int64(0); i < l; i++ { - (*v)[i].Assign(t, oa.Elem(t, i)) - } -} - -func (v *arrayV) Get(*Thread) ArrayValue { return v } - -func (v *arrayV) Elem(t *Thread, i int64) Value { - return (*v)[i] -} - -func (v *arrayV) Sub(i int64, len int64) ArrayValue { - res := (*v)[i : i+len] - return &res -} - -/* - * Struct - */ - -type structV []Value - -// TODO(austin) Should these methods (and arrayV's) be on structV -// instead of *structV? -func (v *structV) String() string { - res := "{" - for i, v := range *v { - if i > 0 { - res += ", " - } - res += v.String() - } - return res + "}" -} - -func (v *structV) Assign(t *Thread, o Value) { - oa := o.(StructValue) - l := len(*v) - for i := 0; i < l; i++ { - (*v)[i].Assign(t, oa.Field(t, i)) - } -} - -func (v *structV) Get(*Thread) StructValue { return v } - -func (v *structV) Field(t *Thread, i int) Value { - return (*v)[i] -} - -/* - * Pointer - */ - -type ptrV struct { - // nil if the pointer is nil - target Value -} - -func (v *ptrV) String() string { - if v.target == nil { - return "<nil>" - } - return "&" + v.target.String() -} - -func (v *ptrV) Assign(t *Thread, o Value) { v.target = o.(PtrValue).Get(t) } - -func (v *ptrV) Get(*Thread) Value { return v.target } - -func (v *ptrV) Set(t *Thread, x Value) { v.target = x } - -/* - * Functions - */ - -type funcV struct { - target Func -} - -func (v *funcV) String() string { - // TODO(austin) Rob wants to see the definition - return "func {...}" -} - -func (v *funcV) Assign(t *Thread, o Value) { v.target = o.(FuncValue).Get(t) } - -func (v *funcV) Get(*Thread) Func { return v.target } - -func (v *funcV) Set(t *Thread, x Func) { v.target = x } - -/* - * Interfaces - */ - -type interfaceV struct { - Interface -} - -func (v *interfaceV) String() string { - if v.Type == nil || v.Value == nil { - return "<nil>" - } - return v.Value.String() -} - -func (v *interfaceV) Assign(t *Thread, o Value) { - v.Interface = o.(InterfaceValue).Get(t) -} - -func (v *interfaceV) Get(*Thread) Interface { return v.Interface } - -func (v *interfaceV) Set(t *Thread, x Interface) { - v.Interface = x -} - -/* - * Slices - */ - -type sliceV struct { - Slice -} - -func (v *sliceV) String() string { - if v.Base == nil { - return "<nil>" - } - return v.Base.Sub(0, v.Len).String() -} - -func (v *sliceV) Assign(t *Thread, o Value) { v.Slice = o.(SliceValue).Get(t) } - -func (v *sliceV) Get(*Thread) Slice { return v.Slice } - -func (v *sliceV) Set(t *Thread, x Slice) { v.Slice = x } - -/* - * Maps - */ - -type mapV struct { - target Map -} - -func (v *mapV) String() string { - if v.target == nil { - return "<nil>" - } - res := "map[" - i := 0 - v.target.Iter(func(key interface{}, val Value) bool { - if i > 0 { - res += ", " - } - i++ - res += fmt.Sprint(key) + ":" + val.String() - return true - }) - return res + "]" -} - -func (v *mapV) Assign(t *Thread, o Value) { v.target = o.(MapValue).Get(t) } - -func (v *mapV) Get(*Thread) Map { return v.target } - -func (v *mapV) Set(t *Thread, x Map) { v.target = x } - -type evalMap map[interface{}]Value - -func (m evalMap) Len(t *Thread) int64 { return int64(len(m)) } - -func (m evalMap) Elem(t *Thread, key interface{}) Value { - return m[key] -} - -func (m evalMap) SetElem(t *Thread, key interface{}, val Value) { - if val == nil { - m[key] = nil, false - } else { - m[key] = val - } -} - -func (m evalMap) Iter(cb func(key interface{}, val Value) bool) { - for k, v := range m { - if !cb(k, v) { - break - } - } -} - -/* - * Multi-values - */ - -type multiV []Value - -func (v multiV) String() string { - res := "(" - for i, v := range v { - if i > 0 { - res += ", " - } - res += v.String() - } - return res + ")" -} - -func (v multiV) Assign(t *Thread, o Value) { - omv := o.(multiV) - for i := range v { - v[i].Assign(t, omv[i]) - } -} - -/* - * Universal constants - */ - -func init() { - s := universe - - true := boolV(true) - s.DefineConst("true", universePos, BoolType, &true) - false := boolV(false) - s.DefineConst("false", universePos, BoolType, &false) -} |