expr/operand-selector-case.go

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// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.
// operand-selector-case.go
package expr
import "fmt"
// -------- selector case term
type selectorCase struct {
filterList *term
caseExpr Expr
}
func newSelectorCaseTerm(row, col int, filterList *term, caseExpr Expr) *term {
tk := NewValueToken(row, col, SymSelectorCase, "", &selectorCase{filterList: filterList, caseExpr: caseExpr})
return &term{
tk: *tk,
parent: nil,
children: nil,
position: posLeaf,
priority: priValue,
evalFunc: evalSelectorCase,
}
}
// -------- eval selector case
func evalSelectorCase(ctx ExprContext, self *term) (v any, err error) {
var ok bool
if v, ok = self.value().(*selectorCase); !ok {
err = fmt.Errorf("selector-case expected, got %T", self.value())
}
return
}