MATCH(DT_BFLOAT16, half);
    MATCH(DT_STRING, string);

    // TODO(b/188995810): DenseElementsAttr::get doesn't support complex
    // Attributes being passed, so we bail out for now. This should just be
    //   MATCH(DT_COMPLEX64, scomplex) / 2;
    //   MATCH(DT_COMPLEX128, dcomplex) / 2;
    // when DenseElementsAttr is updated.
    case DT_COMPLEX64:
    case DT_COMPLEX128:
    default:
      return -1;
  }

keyword:/\b(?:break|case|chan|const|continue|default|defer|else|fallthrough|for|func|go(?:to)?|if|import|interface|map|package|range|return|select|struct|switch|type|var)\b/,builtin:/\b(?:bool|byte|complex(?:64|128)|error|float(?:32|64)|rune|string|u?int(?:8|16|32|64)?|uintptr|append|cap|close|complex|copy|delete|imag|len|make|new|panic|print(?:ln)?|real|recover)\b/,boolean:/\b(?:_|iota|nil|true|false)\b/,operator:/[*\/%^!=]=?|\+[=+]?|-[=-]?|\|[=|]?|&(?:=|&|\^=?)?|>(?:>=?|=)?|<(?:<=?|=|-)?|:=|\....

// walkDivMod walks an ODIV or OMOD node.
func walkDivMod(n *ir.BinaryExpr, init *ir.Nodes) ir.Node {
	n.X = walkExpr(n.X, init)
	n.Y = walkExpr(n.Y, init)

	// rewrite complex div into function call.
	et := n.X.Type().Kind()

	if types.IsComplex[et] && n.Op() == ir.ODIV {
		t := n.Type()

	case reflect.Float64:
		v.SetFloat(math.Float64frombits(d.uint64()))

	case reflect.Complex64:
		v.SetComplex(complex(
			float64(math.Float32frombits(d.uint32())),
			float64(math.Float32frombits(d.uint32())),
		))
	case reflect.Complex128:
		v.SetComplex(complex(
			math.Float64frombits(d.uint64()),
			math.Float64frombits(d.uint64()),
		))
	}
}

	//  func f() {
	//  	var x []int
	//  	y := []int64{1,2,3}
	//  	copy(x, y)
	//  }
	InvalidCopy

	// InvalidComplex occurs when the complex built-in function is called with
	// arguments with incompatible types.
	//
	// Example:
	//  var _ = complex(float32(1), float64(2))
	InvalidComplex

	// InvalidDelete occurs when the delete built-in function is called with a
	// first argument that is not a map.

		val = constant.MakeString(r.string())

	case types.IsInteger:
		var x big.Int
		r.mpint(&x, b)
		val = constant.Make(&x)

	case types.IsFloat:
		val = r.mpfloat(b)

	case types.IsComplex:
		re := r.mpfloat(b)
		im := r.mpfloat(b)
		val = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))

	default:
		errorf("unexpected type %v", typ) // panics
		panic("unreachable")
	}

	case reflect.Float32:
		p.fmtFloat(f.Float(), 32, verb)
	case reflect.Float64:
		p.fmtFloat(f.Float(), 64, verb)
	case reflect.Complex64:
		p.fmtComplex(f.Complex(), 64, verb)
	case reflect.Complex128:
		p.fmtComplex(f.Complex(), 128, verb)
	case reflect.String:
		p.fmtString(f.String(), verb)
	case reflect.Map:
		if p.fmt.sharpV {
			p.buf.writeString(f.Type().String())
			if f.IsNil() {

			// This is a slice that we only partially allocated.
			growSlice(v, &slice, length)
		}
		real := float32FromBits(state.decodeUint(), ovfl)
		imag := float32FromBits(state.decodeUint(), ovfl)
		slice[i] = complex(float32(real), float32(imag))
	}
	return true
}

func decComplex128Array(state *decoderState, v reflect.Value, length int, ovfl error) bool {
	// Can only slice if it is addressable.
	if !v.CanAddr() {

			return false
		}
	}
	return true
}

var errComplex = errors.New("expression too complex for // +build lines")

// PlusBuildLines returns a sequence of “// +build” lines that evaluate to the build expression x.
// If the expression is too complex to convert directly to “// +build” lines, PlusBuildLines returns an error.
func PlusBuildLines(x Expr) ([]string, error) {

func truncate(c ir.Node, t *types.Type) (ir.Node, bool) {
	ct := c.Type()
	cv := c.Val()
	if ct.Kind() != t.Kind() {
		switch {
		default:
			// Note: float -> float/integer and complex -> complex are valid but subtle.
			// For example a float32(float64 1e300) evaluates to +Inf at runtime
			// and the compiler doesn't have any concept of +Inf, so that would
			// have to be left for runtime code evaluation.