chore: import upstream snapshot with attribution

server/functions/framework/intermediate_function.go

@@ -0,0 +1,35 @@
+// Copyright 2024 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package framework
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+)
+
+// IntermediateFunction is an expression that represents an incomplete PostgreSQL function.
+type IntermediateFunction struct {
+	Functions    *Overloads
+	AllOverloads []Overload
+	IsOperator   bool
+}
+
+// Compile returns a CompiledFunction created from the calling IntermediateFunction. Returns a nil function if it could
+// not be compiled.
+func (f IntermediateFunction) Compile(ctx *sql.Context, name string, parameters ...sql.Expression) *CompiledFunction {
+	if f.Functions == nil {
+		return nil
+	}
+	return newCompiledFunctionInternal(ctx, name, parameters, f.Functions, f.AllOverloads, f.IsOperator, nil)
+}