moved a subset of source file to the kern package

bind-expr-functions.go

@@ -4,20 +4,24 @@
 // function.go
 package expr
 
+import (
+	"git.portale-stac.it/go-pkg/expr/kern"
+)
+
 // ---- Linking with Expr functions
 type exprFunctor struct {
-	baseFunctor
-	params []ExprFuncParam
+	kern.BaseFunctor
+	params []kern.ExprFuncParam
 	expr   Expr
-	defCtx ExprContext
+	defCtx kern.ExprContext
 }
 
-func (functor *exprFunctor) GetParams() (params []ExprFuncParam) {
+func (functor *exprFunctor) GetParams() (params []kern.ExprFuncParam) {
 	return functor.params
 }
 
-func newExprFunctor(e Expr, params []ExprFuncParam, ctx ExprContext) *exprFunctor {
-	var defCtx ExprContext
+func newExprFunctor(e Expr, params []kern.ExprFuncParam, ctx kern.ExprContext) *exprFunctor {
+	var defCtx kern.ExprContext
 	if ctx != nil {
 		defCtx = ctx
 	}
@@ -28,17 +32,17 @@ func (functor *exprFunctor) TypeName() string {
 	return "ExprFunctor"
 }
 
-func (functor *exprFunctor) GetDefinitionContext() ExprContext {
+func (functor *exprFunctor) GetDefinitionContext() kern.ExprContext {
 	return functor.defCtx
 }
 
-func (functor *exprFunctor) InvokeNamed(ctx ExprContext, name string, args map[string]any) (result any, err error) {
+func (functor *exprFunctor) InvokeNamed(ctx kern.ExprContext, name string, args map[string]any) (result any, err error) {
 	var missing []string
 	for _, p := range functor.params {
 		if arg, exists := args[p.Name()]; exists {
-			if funcArg, ok := arg.(Functor); ok {
+			if funcArg, ok := arg.(kern.Functor); ok {
 				paramSpecs := funcArg.GetParams()
-				ctx.RegisterFunc(p.Name(), funcArg, TypeAny, paramSpecs)
+				ctx.RegisterFunc(p.Name(), funcArg, kern.TypeAny, paramSpecs)
 			} else {
 				ctx.UnsafeSetVar(p.Name(), arg)
 			}
@@ -51,7 +55,7 @@ func (functor *exprFunctor) InvokeNamed(ctx ExprContext, name string, args map[s
 		}
 	}
 	if missing != nil {
-		err = ErrMissingParams(name, missing)
+		err = kern.ErrMissingParams(name, missing)
 	} else {
 		result, err = functor.expr.Eval(ctx)
 	}