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ddafaca850
* Issue #376 fix - RemoveColumn * Removing of columns is forbidden when there are formula arrays in the area of removing, except 1-column wide arrays * Modifying named ranges, column ranges when deleting a column * Updating formulas when deleting a column * UpdateAction
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
// Copyright 2017 FoxyUtils ehf. All rights reserved.
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//
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// Use of this source code is governed by the terms of the Affero GNU General
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// Public License version 3.0 as published by the Free Software Foundation and
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// appearing in the file LICENSE included in the packaging of this file. A
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// commercial license can be purchased on https://unidoc.io.
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package formula
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import "github.com/unidoc/unioffice/spreadsheet/update"
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// Negate is a negate expression like -A1.
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type Negate struct {
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e Expression
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}
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// NewNegate constructs a new negate expression.
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func NewNegate(e Expression) Expression {
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return Negate{e}
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}
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// Eval evaluates and returns the result of a Negate expression.
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func (n Negate) Eval(ctx Context, ev Evaluator) Result {
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r := n.e.Eval(ctx, ev)
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if r.Type == ResultTypeNumber {
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return MakeNumberResult(-r.ValueNumber)
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}
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return MakeErrorResult("NEGATE expected number argument")
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}
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// Reference returns an invalid reference for Negate.
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func (n Negate) Reference(ctx Context, ev Evaluator) Reference {
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return ReferenceInvalid
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}
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// String returns a string representation for Negate.
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func (n Negate) String() string {
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return "-" + n.e.String()
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}
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// Update updates references in the Negate after removing a row/column.
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func (n Negate) Update(q *update.UpdateQuery) Expression {
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return Negate{n.e.Update(q)}
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}
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