42 lines
848 B
Go
42 lines
848 B
Go
// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
|
|
// All rights reserved.
|
|
|
|
// operator-plugin.go
|
|
package expr
|
|
|
|
import (
|
|
"git.portale-stac.it/go-pkg/expr/kern"
|
|
"git.portale-stac.it/go-pkg/expr/scan"
|
|
)
|
|
|
|
//-------- plugin term
|
|
|
|
func newPluginTerm(tk *scan.Token) (inst *scan.Term) {
|
|
return &scan.Term{
|
|
Tk: *tk,
|
|
Children: make([]*scan.Term, 0, 1),
|
|
Position: scan.PosPrefix,
|
|
Priority: scan.PriSign,
|
|
EvalFunc: evalPlugin,
|
|
}
|
|
}
|
|
|
|
func evalPlugin(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
|
|
var childValue any
|
|
var count int
|
|
|
|
if childValue, err = opTerm.EvalPrefix(ctx); err != nil {
|
|
return
|
|
}
|
|
|
|
if count, err = importPluginFromSearchPath(ctx, childValue); err == nil {
|
|
v = int64(count)
|
|
}
|
|
return
|
|
}
|
|
|
|
// init
|
|
func init() {
|
|
scan.RegisterTermConstructor(scan.SymKwPlugin, newPluginTerm)
|
|
}
|