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Package ifaceassert

import "cmd/vendor/golang.org/x/tools/go/analysis/passes/ifaceassert"
Overview
Index

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 ▾

Package files

doc.go ifaceassert.go

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,
}