github.com/goplus/igop@v0.25.0/unop_x.go (about)

     1  /*
     2   * Copyright (c) 2022 The GoPlus Authors (goplus.org). All rights reserved.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package igop
    18  
    19  import (
    20  	"reflect"
    21  
    22  	"github.com/visualfc/xtype"
    23  	"golang.org/x/tools/go/ssa"
    24  )
    25  
    26  func makeUnOpNOT(pfn *function, instr *ssa.UnOp) func(fr *frame) {
    27  	ir := pfn.regIndex(instr)
    28  	ix, kx, vx := pfn.regIndex3(instr.X)
    29  	typ := pfn.Interp.preToType(instr.Type())
    30  	if typ.PkgPath() == "" {
    31  		if kx == kindConst {
    32  			v := !vx.(bool)
    33  			return func(fr *frame) {
    34  				fr.setReg(ir, v)
    35  			}
    36  		}
    37  		return func(fr *frame) {
    38  			v := !fr.reg(ix).(bool)
    39  			fr.setReg(ir, v)
    40  		}
    41  	} else {
    42  		if kx == kindConst {
    43  			v := xtype.Not(vx)
    44  			return func(fr *frame) {
    45  				fr.setReg(ir, v)
    46  			}
    47  		}
    48  		return func(fr *frame) {
    49  			v := xtype.Not(fr.reg(ix))
    50  			fr.setReg(ir, v)
    51  		}
    52  	}
    53  }
    54  
    55  func makeUnOpMUL(pfn *function, instr *ssa.UnOp) func(fr *frame) {
    56  	ir := pfn.regIndex(instr)
    57  	ix, kx, vx := pfn.regIndex3(instr.X)
    58  	if kx == kindGlobal {
    59  		v := reflect.ValueOf(vx)
    60  		return func(fr *frame) {
    61  			elem := v.Elem()
    62  			if !elem.IsValid() {
    63  				panic(runtimeError("invalid memory address or nil pointer dereference"))
    64  			}
    65  			fr.setReg(ir, elem.Interface())
    66  		}
    67  	}
    68  	return func(fr *frame) {
    69  		elem := reflect.ValueOf(fr.reg(ix)).Elem()
    70  		if !elem.IsValid() {
    71  			panic(runtimeError("invalid memory address or nil pointer dereference"))
    72  		}
    73  		fr.setReg(ir, elem.Interface())
    74  	}
    75  }
    76  
    77  func makeUnOpARROW(pfn *function, instr *ssa.UnOp) func(fr *frame) {
    78  	ir := pfn.regIndex(instr)
    79  	ix, kx, vx := pfn.regIndex3(instr.X)
    80  	typ := pfn.Interp.preToType(instr.X.Type()).Elem()
    81  	if kx == kindGlobal {
    82  		x := reflect.ValueOf(vx)
    83  		if instr.CommaOk {
    84  			return func(fr *frame) {
    85  				v, ok := x.Recv()
    86  				if !ok {
    87  					v = reflect.New(typ).Elem()
    88  				}
    89  				fr.setReg(ir, tuple{v.Interface(), ok})
    90  			}
    91  		}
    92  		return func(fr *frame) {
    93  			v, ok := x.Recv()
    94  			if !ok {
    95  				v = reflect.New(typ).Elem()
    96  			}
    97  			fr.setReg(ir, v.Interface())
    98  		}
    99  	}
   100  	if instr.CommaOk {
   101  		return func(fr *frame) {
   102  			x := reflect.ValueOf(fr.reg(ix))
   103  			v, ok := x.Recv()
   104  			if !ok {
   105  				v = reflect.New(typ).Elem()
   106  			}
   107  			fr.setReg(ir, tuple{v.Interface(), ok})
   108  		}
   109  	}
   110  	return func(fr *frame) {
   111  		x := reflect.ValueOf(fr.reg(ix))
   112  		v, ok := x.Recv()
   113  		if !ok {
   114  			v = reflect.New(typ).Elem()
   115  		}
   116  		fr.setReg(ir, v.Interface())
   117  	}
   118  }