30 lines
586 B
Go
30 lines
586 B
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// operand-expr.go
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package expr
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import "fmt"
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// -------- expr term
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func newExprTerm(tk *Token) *term {
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return &term{
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tk: *tk,
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parent: nil,
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children: nil,
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position: posLeaf,
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priority: priValue,
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evalFunc: evalExpr,
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}
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}
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// -------- eval expr
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func evalExpr(ctx ExprContext, self *term) (v any, err error) {
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if expr, ok := self.value().(Expr); ok {
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v, err = expr.eval(ctx, false)
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} else {
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err = fmt.Errorf("expression expected, got %T", self.value())
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}
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return
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}
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