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Find definitions and declarations in Go source code that shadow predeclared identifiers

License: BSD 3-Clause "New" or "Revised" License

Go 100.00%

predeclared's Introduction

predeclared

Find code that overrides one of Go's predeclared identifiers (new, make, append uint, etc.).

The list of predeclared identifiers can be found in the spec.

go get github.com/nishanths/predeclared

See godoc or run predeclared without arguments to print usage.

Test

cd passes/predeclared && go test

Examples

Given a package with the file:

package pkg // import "example.org/foo/pkg"

func copy()  {}
func print() {}

func foo() string {
	string := "x"
	return string
}

type int struct{}

running:

predeclared example.org/foo/pkg

prints:

example.go:3:6: function "copy" has same name as predeclared identifier
example.go:4:6: function "print" has same name as predeclared identifier
example.go:7:2: variable "string" has same name as predeclared identifier
example.go:11:6: type "int" has same name as predeclared identifier

Running the program on the standard library's text package and subpackages produces:

$ predeclared text/...
/usr/local/go/src/text/template/parse/node.go:554:33: param "true" has same name as predeclared identifier
/usr/local/go/src/text/template/parse/node.go:599:3: variable "rune" has same name as predeclared identifier
/usr/local/go/src/text/template/funcs.go:164:36: param "cap" has same name as predeclared identifier
/usr/local/go/src/text/template/funcs.go:233:3: variable "cap" has same name as predeclared identifier
/usr/local/go/src/text/template/template.go:218:30: param "new" has same name as predeclared identifier
/usr/local/go/src/text/template/exec_test.go:232:21: param "error" has same name as predeclared identifier

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