expr/operand-const.go

// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// operand-const.go
package expr

// -------- const term
func newConstTerm(tk *Token) *term {
	return &term{
		tk:       *tk,
		parent:   nil,
		children: nil,
		position: posLeaf,
		priority: priValue,
		evalFunc: evalConst,
	}
}

// -------- eval func
func evalConst(ctx ExprContext, self *term) (v any, err error) {
	v = self.tk.Value
	return
}

// init
func init() {
	registerTermConstructor(SymString, newConstTerm)
	registerTermConstructor(SymInteger, newConstTerm)
	registerTermConstructor(SymFloat, newConstTerm)
	registerTermConstructor(SymBool, newConstTerm)
	registerTermConstructor(SymKwNil, newConstTerm)
}