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values_conversions.go
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/
values_conversions.go
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package gno
import (
"fmt"
"math"
"math/big"
"reflect"
"strconv"
"github.com/cockroachdb/apd"
)
// t cannot be nil or untyped or DataByteType.
// the conversion is forced and overflow/underflow is ignored.
// TODO: return error, and let caller also print the file and line.
func ConvertTo(alloc *Allocator, store Store, tv *TypedValue, t Type) {
if debug {
if t == nil {
panic("ConvertTo() requires non-nil type")
}
if isUntyped(t) {
panic("cannot convert to untyped type")
}
if isDataByte(t) {
panic("cannot convert to databyte type")
}
if isDataByte(tv.T) {
panic("should not happen")
}
}
// special case for go-native conversions
ntv, tvIsNat := tv.T.(*NativeType)
nt, tIsNat := t.(*NativeType)
if tvIsNat {
if tIsNat {
// both NativeType, use reflect to assert.
if debug {
if !ntv.Type.ConvertibleTo(nt.Type) {
panic(fmt.Sprintf(
"cannot convert %s to %s",
ntv.String(), nt.String()))
}
}
tv.T = t
return
} else {
// convert go-native to gno type (shallow).
*tv = go2GnoValue2(alloc, store, tv.V.(*NativeValue).Value, false)
ConvertTo(alloc, store, tv, t)
return
}
} else {
if tIsNat {
// convert gno to go-native type.
rv := reflect.New(nt.Type).Elem()
rv = gno2GoValue(tv, rv)
if debug {
if !rv.Type().ConvertibleTo(nt.Type) {
panic(fmt.Sprintf(
"cannot convert %s to %s",
tv.String(), nt.String()))
}
}
*tv = TypedValue{
T: t,
V: alloc.NewNative(rv),
}
return
} else {
goto GNO_CASE
}
}
GNO_CASE:
// special case for interface target
if t.Kind() == InterfaceKind {
return
}
// special case for undefined/nil source
if tv.IsUndefined() {
tv.T = t
return
}
// general case
tvk := tv.T.Kind()
k := t.Kind()
if tvk == k {
tv.T = t // simple conversion.
return
}
switch tvk {
case IntKind:
switch k {
case IntKind:
x := int(tv.GetInt())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetInt())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetInt())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetInt())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetInt())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetInt())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetInt())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetInt())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetInt())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetInt())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetInt()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetInt()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetInt())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Int8Kind:
switch k {
case IntKind:
x := int(tv.GetInt8())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetInt8())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetInt8())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetInt8())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetInt8())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetInt8())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetInt8())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetInt8())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetInt8())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetInt8())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetInt8()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetInt8()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetInt8())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Int16Kind:
switch k {
case IntKind:
x := int(tv.GetInt16())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetInt16())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetInt16())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetInt16())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetInt16())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetInt16())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetInt16())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetInt16())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetInt16())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetInt16())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetInt16()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetInt16()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetInt16())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Int32Kind:
switch k {
case IntKind:
x := int(tv.GetInt32())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetInt32())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetInt32())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetInt32())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetInt32())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetInt32())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetInt32())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetInt32())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetInt32())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetInt32())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetInt32()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetInt32()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetInt32())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Int64Kind:
switch k {
case IntKind:
x := int(tv.GetInt64())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetInt64())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetInt64())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetInt64())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetInt64())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetInt64())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetInt64())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetInt64())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetInt64())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetInt64())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetInt64()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetInt64()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetInt64())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case UintKind:
switch k {
case IntKind:
x := int(tv.GetUint())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetUint())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetUint())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetUint())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetUint())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetUint())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetUint())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetUint())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetUint())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetUint())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetUint()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetUint()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetUint())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Uint8Kind:
switch k {
case IntKind:
x := int(tv.GetUint8())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetUint8())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetUint8())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetUint8())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetUint8())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetUint8())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetUint8())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetUint8())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetUint8())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetUint8())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetUint8()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetUint8()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetUint8())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Uint16Kind:
switch k {
case IntKind:
x := int(tv.GetUint16())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetUint16())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetUint16())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetUint16())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetUint16())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetUint16())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetUint16())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetUint16())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetUint16())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetUint16())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetUint16()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetUint16()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetUint16())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Uint32Kind:
switch k {
case IntKind:
x := int(tv.GetUint32())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetUint32())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetUint32())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetUint32())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetUint32())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetUint32())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetUint32())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetUint32())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetUint32())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetUint32())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetUint32()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetUint32()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetUint32())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Uint64Kind:
switch k {
case IntKind:
x := int(tv.GetUint64())
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetUint64())
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetUint64())
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetUint64())
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetUint64())
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetUint64())
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetUint64())
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetUint64())
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetUint64())
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetUint64())
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetUint64()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetUint64()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
case StringKind:
tv.V = alloc.NewString(string(rune(tv.GetUint64())))
tv.T = t
tv.ClearNum()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Float32Kind:
switch k {
case IntKind:
x := int(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetFloat32()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case Float64Kind:
switch k {
case IntKind:
x := int(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetInt(x)
case Int8Kind:
x := int8(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetInt8(x)
case Int16Kind:
x := int16(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetInt16(x)
case Int32Kind:
x := int32(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetInt32(x)
case Int64Kind:
x := int64(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetInt64(x)
case UintKind:
x := uint(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetUint(x)
case Uint8Kind:
x := uint8(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetUint8(x)
case Uint16Kind:
x := uint16(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetUint16(x)
case Uint32Kind:
x := uint32(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetUint32(x)
case Uint64Kind:
x := uint64(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetUint64(x)
case Float32Kind:
x := float32(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetFloat32(x)
case Float64Kind:
x := float64(tv.GetFloat64()) // XXX determinism?
tv.T = t
tv.SetFloat64(x)
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case StringKind:
bt := baseOf(t)
switch cbt := bt.(type) {
case *SliceType:
switch cbt.Elt.Kind() {
case Uint8Kind:
tv.V = alloc.NewSliceFromData([]byte(tv.GetString()))
tv.T = t // after tv.GetString()
case Int32Kind:
runes := []TypedValue{}
str := tv.GetString()
for _, r := range str {
runes = append(runes, typedRune(r))
}
tv.V = alloc.NewSliceFromList(runes)
tv.T = t // after tv.GetString()
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), t.String()))
}
default:
panic(fmt.Sprintf(
"cannot convert %s to %s",
tvk.String(), k.String()))
}
case SliceKind:
if t.Kind() == StringKind {
tk := tv.T.Elem().Kind()
if tk != Uint8Kind && tk != Int32Kind {
panic(fmt.Sprintf(
"cannot convert %s to %s",
tv.T.String(), t.String()))
}
switch sv := tv.V.(type) {
case nil:
tv.T = t
tv.V = alloc.NewString(string(""))
case *SliceValue:
svo := sv.Offset
svl := sv.Length
svb := sv.GetBase(store)
if svb.Data == nil {
if tk == Uint8Kind {
data := make([]byte, svl)
copyListToData(
data[:svl],
svb.List[svo:svo+svl])
strv := alloc.NewString(string(data))
tv.T = t
tv.V = strv
} else if tk == Int32Kind {
runes := make([]rune, svl)
copyListToRunes(
runes[:svl],
svb.List[svo:svo+svl])
strv := alloc.NewString(string(runes))
tv.T = t
tv.V = strv
} else {
panic("should not happen")
}
} else {
data := svb.Data[svo : svo+svl]
strv := alloc.NewString(string(data))
tv.T = t
tv.V = strv
}
default:
panic("should not happen")
}
} else {
panic(fmt.Sprintf(
"cannot convert %s to %s",
tv.T.String(), k.String()))
}
default:
panic(fmt.Sprintf(
"cannot convert %s to any other kind",
tvk.String()))
}
}
// TODO: move untyped const stuff to preprocess.go
// Convert the untyped const tv to the t type.
// If t is nil, the default type is used.
// Panics if conversion is illegal.
// TODO: method on TypedValue?
func ConvertUntypedTo(tv *TypedValue, t Type) {
if debug {
if !isUntyped(tv.T) {
panic(fmt.Sprintf(
"ConvertUntypedTo expects untyped const source but got %s",
tv.T.String()))
}
if isUntyped(t) {
ptv, ok1 := baseOf(tv.T).(PrimitiveType)
pt, ok2 := baseOf(t).(PrimitiveType)
if ok1 && ok2 && ptv.Specificity() > pt.Specificity() {
// ok
} else {
panic(fmt.Sprintf(
"ConvertUntypedTo expects more specific target but got %s",
t.String()))
}
}
}
// special case: native
if nt, ok := t.(*NativeType); ok {
// first convert untyped to typed gno value.
gnot := go2GnoBaseType(nt.Type)
if debug {
if _, ok := gnot.(*NativeType); ok {
panic("should not happen")
}
}
ConvertUntypedTo(tv, gnot)
// then convert to native value.
// NOTE: this should only be called during preprocessing, so no alloc needed.
ConvertTo(nilAllocator, nil, tv, t)
}
// special case: simple conversion
if t != nil && tv.T.Kind() == t.Kind() {
tv.T = t
return
}
// general case
if t == nil {
t = defaultTypeOf(tv.T)
}
switch tv.T {
case UntypedBoolType:
if debug {
if t.Kind() != BoolKind {
panic("untyped bool can only be converted to bool kind")
}
}
tv.T = t
case UntypedRuneType:
ConvertUntypedRuneTo(tv, t)
case UntypedBigintType:
if preprocessing == 0 {
panic("untyped Bigint conversion should not happen during interpretation")
}
ConvertUntypedBigintTo(tv, tv.V.(BigintValue), t)
case UntypedBigdecType:
if preprocessing == 0 {
panic("untyped Bigdec conversion should not happen during interpretation")
}
ConvertUntypedBigdecTo(tv, tv.V.(BigdecValue), t)
case UntypedStringType:
if preprocessing == 0 {
panic("untyped String conversion should not happen during interpretation")
}
if t.Kind() == StringKind {
tv.T = t
return
} else {
ConvertTo(nilAllocator, nil, tv, t)
}
default:
panic(fmt.Sprintf(
"unexpected untyped const type %s",
tv.T.String()))
}
}
// All fields may be modified to complete the conversion.
func ConvertUntypedRuneTo(dst *TypedValue, t Type) {
sv := dst.GetInt32()
k := t.Kind()
switch k {
case IntKind, Int8Kind, Int16Kind, Int32Kind, Int64Kind:
case UintKind, Uint8Kind, Uint16Kind, Uint32Kind, Uint64Kind:
case StringKind, BigintKind, BigdecKind:
default:
panic(fmt.Sprintf(
"cannot convert untyped rune type to %s",
k.String()))
}
// Set .T exactly to t, and set .V to nil
// since the result is only primitive (unless string)
dst.T = t
if debug {
if dst.V != nil {
panic("should not happen")
}
}
// Check the bounds of sv or uv, given that
// the value is within int64 or uint64.
switch k {
case IntKind:
dst.SetInt(int(sv))
case Int8Kind:
if math.MaxInt8 < sv {
panic("rune overflows target kind")
}
if sv < math.MinInt8 {
panic("rune underflows target kind")
}
dst.SetInt8(int8(sv))
case Int16Kind:
if math.MaxInt16 < sv {
panic("rune overflows target kind")
}
if sv < math.MinInt16 {
panic("rune underflows target kind")
}
dst.SetInt16(int16(sv))
case Int32Kind: