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2026-07-13 12:32:25 +08:00

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// Copyright 2025 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/doltgresql/core/extensions"
"github.com/dolthub/doltgresql/core/id"
pgtypes "github.com/dolthub/doltgresql/server/types"
)
// CFunction is the implementation of functions that host their logic in a shared library.
type CFunction struct {
ID id.Function
ReturnType *pgtypes.DoltgresType
ParameterTypes []*pgtypes.DoltgresType
Variadic bool
IsNonDeterministic bool
Strict bool
ExtensionName extensions.LibraryIdentifier
ExtensionSymbol string
}
var _ FunctionInterface = CFunction{}
// GetExpectedParameterCount implements the interface FunctionInterface.
func (cFunc CFunction) GetExpectedParameterCount() int {
return len(cFunc.ParameterTypes)
}
// GetName implements the interface FunctionInterface.
func (cFunc CFunction) GetName() string {
return cFunc.ID.FunctionName()
}
// GetParameters implements the interface FunctionInterface.
func (cFunc CFunction) GetParameters() []*pgtypes.DoltgresType {
return cFunc.ParameterTypes
}
// GetReturn implements the interface FunctionInterface.
func (cFunc CFunction) GetReturn() *pgtypes.DoltgresType {
return cFunc.ReturnType
}
// InternalID implements the interface FunctionInterface.
func (cFunc CFunction) InternalID() id.Id {
return cFunc.ID.AsId()
}
// IsStrict implements the interface FunctionInterface.
func (cFunc CFunction) IsStrict() bool {
return cFunc.Strict
}
// NonDeterministic implements the interface FunctionInterface.
func (cFunc CFunction) NonDeterministic() bool {
return cFunc.IsNonDeterministic
}
// IsCVariadic implements the FunctionInterface interface.
func (cFunc CFunction) IsCVariadic() bool {
// TODO: implement c-language variadic
return false
}
// VariadicIndex implements the interface FunctionInterface.
func (cFunc CFunction) VariadicIndex() int {
// TODO: implement variadic
return -1
}
// IsSRF implements the interface FunctionInterface.
func (cFunc CFunction) IsSRF() bool {
return false
}
// enforceInterfaceInheritance implements the interface FunctionInterface.
func (cFunc CFunction) enforceInterfaceInheritance(error) {}