45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
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// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// function.go
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package expr
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// ---- Linking with Expr functions
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type exprFunctor struct {
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baseFunctor
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params []ExprFuncParam
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expr Expr
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defCtx ExprContext
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}
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// func newExprFunctor(e Expr, params []string, ctx ExprContext) *exprFunctor {
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// return &exprFunctor{expr: e, params: params, defCtx: ctx}
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// }
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func newExprFunctor(e Expr, params []ExprFuncParam, ctx ExprContext) *exprFunctor {
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return &exprFunctor{expr: e, params: params, defCtx: ctx}
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}
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func (functor *exprFunctor) Invoke(ctx ExprContext, name string, args []any) (result any, err error) {
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if functor.defCtx != nil {
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ctx.Merge(functor.defCtx)
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}
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for i, p := range functor.params {
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if i < len(args) {
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arg := args[i]
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if funcArg, ok := arg.(Functor); ok {
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// ctx.RegisterFunc(p, functor, 0, -1)
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paramSpecs := funcArg.GetParams()
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ctx.RegisterFunc(p.Name(), funcArg, TypeAny, paramSpecs)
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} else {
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ctx.UnsafeSetVar(p.Name(), arg)
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}
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} else {
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ctx.UnsafeSetVar(p.Name(), nil)
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}
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}
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result, err = functor.expr.Eval(ctx)
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return
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}
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