39 lines
741 B
Go
39 lines
741 B
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// operator-iter-value.go
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package expr
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//-------- iter value term
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func newIterValueTerm(tk *Token) (inst *term) {
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return &term{
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tk: *tk,
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children: make([]*term, 0, 1),
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position: posPrefix,
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priority: priIterValue,
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evalFunc: evalIterValue,
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}
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}
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func evalIterValue(ctx ExprContext, self *term) (v any, err error) {
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var leftValue any
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if leftValue, err = self.evalPrefix(ctx); err != nil {
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return
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}
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if dc, ok := leftValue.(*dataCursor); ok {
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v, err = dc.Current()
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} else {
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err = self.errIncompatibleType(leftValue)
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}
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return
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}
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// init
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func init() {
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registerTermConstructor(SymOpenClosedRound, newIterValueTerm)
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}
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