lix/src/libexpr/attr-path.hh

#pragma once

#include "eval.hh"

#include <string>
#include <map>

namespace nix {

MakeError(AttrPathNotFound, Error);

std::pair<Value *, Pos> findAlongAttrPath(EvalState & state, const string & attrPath,
    Bindings & autoArgs, Value & vIn);

/* Heuristic to find the filename and lineno or a nix value. */
Pos findDerivationFilename(EvalState & state, Value & v, std::string what);

}
Use "#pragma once" to prevent repeated header file inclusion 2012-07-18 18:59:03 +00:00			`#pragma once`
* Refactoring: get the selection path stuff out of getDerivations() and put it into a separate function findAlongAttrPath(). 2006-07-26 15:05:15 +00:00
* Make sure that config.h is included before the system headers, because it defines _FILE_OFFSET_BITS. Without this, on OpenSolaris the system headers define it to be 32, and then the 32-bit stat() ends up being called with a 64-bit "struct stat", or vice versa. This also ensures that we get 64-bit file sizes everywhere. * Remove the redundant call to stat() in parseExprFromFile(). The file cannot be a symlink because that's the exit condition of the loop before. 2010-10-04 17:55:38 +00:00			`#include "eval.hh"`

* Refactoring: get the selection path stuff out of getDerivations() and put it into a separate function findAlongAttrPath(). 2006-07-26 15:05:15 +00:00			`#include <string>`
			`#include <map>`

* Use a proper namespace. * Optimise header file usage a bit. * Compile the parser as C++. 2006-09-04 21:06:23 +00:00			`namespace nix {`

findAlongAttrPath(): Throw AttrPathNotFound 2019-04-08 12:20:58 +00:00			`MakeError(AttrPathNotFound, Error);`

findAlongAttrPath(): Return position 2020-02-07 13:08:24 +00:00			`std::pair<Value *, Pos> findAlongAttrPath(EvalState & state, const string & attrPath,`
Work on Values instead of Exprs This prevents some duplicate evaluation in nix-env and nix-instantiate. Also, when traversing ~/.nix-defexpr, only read regular files with the extension .nix. Previously it was reading files like .../channels/binary-caches/<name>. The only reason this didn't cause problems is pure luck (namely, <name> shadows an actual Nix expression, the binary-caches files happen to be syntactically valid Nix expressions, and we iterate over the directory contents in just the right order). 2013-09-03 13:17:51 +00:00			`Bindings & autoArgs, Value & vIn);`
* Refactoring: get the selection path stuff out of getDerivations() and put it into a separate function findAlongAttrPath(). 2006-07-26 15:05:15 +00:00
libexpr: findDerivationFilename return Pos instead of tuple 2019-10-28 20:22:38 +00:00			`/* Heuristic to find the filename and lineno or a nix value. */`
			`Pos findDerivationFilename(EvalState & state, Value & v, std::string what);`
libexpr: add findDerivationFilename extract the derivation to filename:lineno heuristic 2019-10-23 15:21:10 +00:00
* Use a proper namespace. * Optimise header file usage a bit. * Compile the parser as C++. 2006-09-04 21:06:23 +00:00			`}`