ifaceassert

Documentation

Overview

Package ifaceassert defines an Analyzer that flags impossible interface-interface type assertions.

Analyzer ifaceassert

ifaceassert: detect impossible interface-to-interface type assertions

This checker flags type assertions v.(T) and corresponding type-switch cases in which the static type V of v is an interface that cannot possibly implement the target interface T. This occurs when V and T contain methods with the same name but different signatures. Example:

var v interface {
	Read()
}
_ = v.(io.Reader)

The Read method in v has a different signature than the Read method in io.Reader, so this assertion cannot succeed.

Index

• Variables

Variables

var Analyzer = &analysis.Analyzer{
	Name:     "ifaceassert",
	Doc:      analysisutil.MustExtractDoc(doc, "ifaceassert"),
	URL:      "https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/ifaceassert",
	Requires: []*analysis.Analyzer{inspect.Analyzer},
	Run:      run,
}