39 lines
986 B
Go
39 lines
986 B
Go
// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// operand-literal.go
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package expr
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import (
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"git.portale-stac.it/go-pkg/expr/kern"
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"git.portale-stac.it/go-pkg/expr/scan"
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)
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// -------- literal term
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func newLiteralTerm(tk *scan.Token) *scan.Term {
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return &scan.Term{
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Tk: *tk,
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Parent: nil,
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Children: nil,
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Position: scan.PosLeaf,
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Priority: scan.PriValue,
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EvalFunc: evalLiteral,
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}
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}
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// -------- eval func
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func evalLiteral(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
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v = opTerm.Tk.Value
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return
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}
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// init
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func init() {
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scan.RegisterTermConstructor(scan.SymString, newLiteralTerm)
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scan.RegisterTermConstructor(scan.SymInteger, newLiteralTerm)
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scan.RegisterTermConstructor(scan.SymFloat, newLiteralTerm)
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scan.RegisterTermConstructor(scan.SymFraction, newLiteralTerm)
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scan.RegisterTermConstructor(scan.SymBool, newLiteralTerm)
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scan.RegisterTermConstructor(scan.SymKwNil, newLiteralTerm)
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}
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