neo-go/pkg/compiler/types.go
2021-02-15 18:48:33 +03:00

96 lines
2 KiB
Go

package compiler
import (
"go/ast"
"go/types"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
func (c *codegen) typeAndValueOf(e ast.Expr) types.TypeAndValue {
for i := len(c.pkgInfoInline) - 1; i >= 0; i-- {
if tv, ok := c.pkgInfoInline[i].Types[e]; ok {
return tv
}
}
return c.typeInfo.Types[e]
}
func (c *codegen) typeOf(e ast.Expr) types.Type {
return c.typeAndValueOf(e).Type
}
func isBasicTypeOfKind(typ types.Type, ks ...types.BasicKind) bool {
if t, ok := typ.Underlying().(*types.Basic); ok {
k := t.Kind()
for i := range ks {
if k == ks[i] {
return true
}
}
}
return false
}
func isMap(typ types.Type) bool {
_, ok := typ.Underlying().(*types.Map)
return ok
}
func isByte(typ types.Type) bool {
return isBasicTypeOfKind(typ, types.Uint8, types.Int8)
}
func isBool(typ types.Type) bool {
return isBasicTypeOfKind(typ, types.Bool, types.UntypedBool)
}
func isNumber(typ types.Type) bool {
t, ok := typ.Underlying().(*types.Basic)
return ok && t.Info()&types.IsNumeric != 0
}
func isString(typ types.Type) bool {
return isBasicTypeOfKind(typ, types.String)
}
func isCompoundSlice(typ types.Type) bool {
t, ok := typ.Underlying().(*types.Slice)
return ok && !isByte(t.Elem())
}
func isByteSlice(typ types.Type) bool {
t, ok := typ.Underlying().(*types.Slice)
return ok && isByte(t.Elem())
}
func toNeoType(typ types.Type) stackitem.Type {
if typ == nil {
return stackitem.AnyT
}
switch t := typ.Underlying().(type) {
case *types.Basic:
info := t.Info()
switch {
case info&types.IsInteger != 0:
return stackitem.IntegerT
case info&types.IsBoolean != 0:
return stackitem.BooleanT
case info&types.IsString != 0:
return stackitem.ByteArrayT
default:
return stackitem.AnyT
}
case *types.Map:
return stackitem.MapT
case *types.Struct:
return stackitem.StructT
case *types.Slice:
if isByte(t.Elem()) {
return stackitem.BufferT
}
return stackitem.ArrayT
default:
return stackitem.AnyT
}
}