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prefixexpr.go
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/
prefixexpr.go
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// Copyright 2017 Baliance. All rights reserved.
//
// Use of this source code is governed by the terms of the Affero GNU General
// Public License version 3.0 as published by the Free Software Foundation and
// appearing in the file LICENSE included in the packaging of this file. A
// commercial license can be purchased by contacting sales@baliance.com.
package formula
import "fmt"
type PrefixExpr struct {
pfx Expression
exp Expression
}
func NewPrefixExpr(pfx, exp Expression) Expression {
return &PrefixExpr{pfx, exp}
}
func (p PrefixExpr) Eval(ctx Context, ev Evaluator) Result {
ref := p.pfx.Reference(ctx, ev)
switch ref.Type {
case ReferenceTypeSheet:
sheetCtx := ctx.Sheet(ref.Value)
return p.exp.Eval(sheetCtx, ev)
default:
return MakeErrorResult(fmt.Sprintf("no support for reference type %s", ref.Type))
}
}
func (p PrefixExpr) Reference(ctx Context, ev Evaluator) Reference {
return ReferenceInvalid
}