Jade Lovelace
21ad02c1d0
The following behaviour was previously present and has been fixed:
lix/lix2 » nix eval --expr '{x."" = 2;}' 'x.""'
{ "" = 2; }
lix/lix2 » nix eval --expr '{x."".y = 2;}' 'x."".y'
error: empty attribute name in selection path 'x."".y'
Change-Id: Iad21988f1191c33a3661c72a6b7f01a8b8b3e6eb
40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#pragma once
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///@file
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#include "lix/libexpr/eval.hh"
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#include <string>
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#include <map>
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namespace nix {
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MakeError(AttrPathNotFound, Error);
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MakeError(NoPositionInfo, Error);
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std::pair<Value *, PosIdx> findAlongAttrPath(
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EvalState & state,
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const std::string & attrPath,
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Bindings & autoArgs,
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Value & vIn);
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/**
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* Heuristic to find the filename and lineno or a nix value.
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*/
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std::pair<SourcePath, uint32_t> findPackageFilename(EvalState & state, Value & v, std::string what);
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/**
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* Parses an attr path (as used in nix-build -A foo.bar.baz) into a list of tokens.
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*
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* Such an attr path is a dot-separated sequence of attribute names, which are possibly quoted.
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* No escaping is performed; attribute names containing double quotes are unrepresentable.
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*/
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std::vector<std::string> parseAttrPath(std::string_view const s);
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/**
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* Converts an attr path from a list of strings into a string once more.
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* The result returned is an attr path and is *not necessarily valid nix syntax*.
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*/
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std::string unparseAttrPath(std::vector<std::string> const & attrPath);
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}
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