51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package pathmatch
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import (
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"bytes"
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"fmt"
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)
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const (
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internalErrorMessagePrefix = "Internal Error: "
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)
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type InternalError interface {
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error
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InternalError()
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}
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// internalInternalError is the only underlying implementation that fits the
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// InternalError interface, in this library.
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type internalInternalError struct {
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msg string
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}
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// newInternalError creates a new internalInternalError (struct) and
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// returns it as a InternalError (interface).
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func newInternalError(format string, a ...interface{}) InternalError {
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msg := fmt.Sprintf(format, a...)
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err := internalInternalError{
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msg:msg,
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}
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return &err
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}
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// Error method is necessary to satisfy the 'error' interface (and the InternalError
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// interface).
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func (err *internalInternalError) Error() string {
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var buffer bytes.Buffer
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buffer.WriteString(internalErrorMessagePrefix)
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buffer.WriteString(err.msg)
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return buffer.String()
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}
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// InternalError method is necessary to satisfy the 'InternalError' interface.
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// It exists to make this error type detectable in a Go type-switch.
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func (err *internalInternalError) InternalError() {
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// Nothing here.
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}
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