attr-path.hh File Reference

#include "lix/libexpr/eval.hh"
#include <string>

Go to the source code of this file.

Functions
	nix::MakeError (AttrPathNotFound, Error)
	nix::MakeError (NoPositionInfo, Error)
std::pair< Value *, PosIdx >	nix::findAlongAttrPath (EvalState &state, const std::string &attrPath, Bindings &autoArgs, Value &vIn)
std::pair< SourcePath, uint32_t >	nix::findPackageFilename (EvalState &state, Value &v, std::string what)
std::vector< std::string >	nix::parseAttrPath (std::string_view const s)
std::string	nix::unparseAttrPath (std::vector< std::string > const &attrPath)

Function Documentation

findPackageFilename()

std::pair< SourcePath, uint32_t > nix::findPackageFilename	(	EvalState &	state,
		Value &	v,
		std::string	what )

Heuristic to find the filename and lineno or a nix value.

parseAttrPath()

std::vector< std::string > nix::parseAttrPath

(

std::string_view const

s

)

Parses an attr path (as used in nix-build -A foo.bar.baz) into a list of tokens.

Such an attr path is a dot-separated sequence of attribute names, which are possibly quoted. No escaping is performed; attribute names containing double quotes are unrepresentable.

unparseAttrPath()

std::string nix::unparseAttrPath

(

std::vector< std::string > const &

attrPath

)

Converts an attr path from a list of strings into a string once more. The result returned is an attr path and is not necessarily valid nix syntax.