eldritch horrors
db35aa753b
with thunk state being shareable we no longer need to worry about value uniqueness, only about value lifetime. this means we can liberally drop indirections and allocations, passing references instead of pointers or using stack memory instead of gc-managed memory for some intermediates. Change-Id: I2d48a6fd57a376d544bd9bd2d05e5420611986d1
37 lines
1.0 KiB
C++
37 lines
1.0 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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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, const std::string & attrPath, Bindings & autoArgs, Value & vIn
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);
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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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