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45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
// Copyright 2017 Baliance. 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 by contacting sales@baliance.com.
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package formula
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type FunctionCall struct {
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name string
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args []Expression
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}
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func NewFunction(name string, args []Expression) Expression {
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return FunctionCall{name, args}
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}
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func (f FunctionCall) Eval(ctx Context, ev Evaluator) Result {
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fn := LookupFunction(f.name)
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if fn != nil {
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args := make([]Result, len(f.args))
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for i, a := range f.args {
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args[i] = a.Eval(ctx, ev)
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args[i].Ref = a.Reference(ctx, ev)
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}
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return fn(args)
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}
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fnx := LookupFunctionComplex(f.name)
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if fnx != nil {
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args := make([]Result, len(f.args))
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for i, a := range f.args {
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args[i] = a.Eval(ctx, ev)
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args[i].Ref = a.Reference(ctx, ev)
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}
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return fnx(ctx, ev, args)
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}
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return MakeErrorResult("unknown function " + f.name)
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}
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func (f FunctionCall) Reference(ctx Context, ev Evaluator) Reference {
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return ReferenceInvalid
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}
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