lix/src/libstore/names.hh

#pragma once

#include <memory>

#include "types.hh"

namespace nix {

struct Regex;

struct DrvName
{
    string fullName;
    string name;
    string version;
    unsigned int hits;

    DrvName();
    DrvName(std::string_view s);
    ~DrvName();

    bool matches(const DrvName & n);

private:
    std::unique_ptr<Regex> regex;
};

typedef list<DrvName> DrvNames;

std::string_view nextComponent(std::string_view::const_iterator & p,
    const std::string_view::const_iterator end);
int compareVersions(const std::string_view v1, const std::string_view v2);
DrvNames drvNamesFromArgs(const Strings & opArgs);

}
Use "#pragma once" to prevent repeated header file inclusion 2012-07-18 18:59:03 +00:00			`#pragma once`
* Refactoring. 2004-02-06 14:49:41 +00:00
Don't recompile the same regex over and over 2014-10-03 19:29:20 +00:00			`#include <memory>`

* Use a proper namespace. * Optimise header file usage a bit. * Compile the parser as C++. 2006-09-04 21:06:23 +00:00			`#include "types.hh"`
* Refactoring. 2004-02-06 14:49:41 +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			`namespace nix {`
* Refactoring. 2004-02-06 14:49:41 +00:00
Don't include <regex> in header files This reduces compilation time by ~15 seconds (CPU time). Issue #4045. 2020-09-21 16:22:45 +00:00			`struct Regex;`

* Refactoring. 2004-02-06 14:49:41 +00:00			`struct DrvName`
			`{`
			`string fullName;`
			`string name;`
			`string version;`
			`unsigned int hits;`

* In `--upgrade': added flags `--lt', `--leq', `--always' to specify whether we want to upgrade if the current version is less than the available version (default), when it is less or equal, or always. * Added a flag `--dry-run' to show what would happen in `--install', `--uninstall', and `--upgrade', without actually performing the operation. 2004-02-09 11:59:39 +00:00			`DrvName();`
Make the Store API more type-safe Most functions now take a StorePath argument rather than a Path (which is just an alias for std::string). The StorePath constructor ensures that the path is syntactically correct (i.e. it looks like <store-dir>/<base32-hash>-<name>). Similarly, functions like buildPaths() now take a StorePathWithOutputs, rather than abusing Path by adding a '!<outputs>' suffix. Note that the StorePath type is implemented in Rust. This involves some hackery to allow Rust values to be used directly in C++, via a helper type whose destructor calls the Rust type's drop() function. The main issue is the dynamic nature of C++ move semantics: after we have moved a Rust value, we should not call the drop function on the original value. So when we move a value, we set the original value to bitwise zero, and the destructor only calls drop() if the value is not bitwise zero. This should be sufficient for most types. Also lots of minor cleanups to the C++ API to make it more modern (e.g. using std::optional and std::string_view in some places). 2019-12-05 18:11:09 +00:00			`DrvName(std::string_view s);`
Don't include <regex> in header files This reduces compilation time by ~15 seconds (CPU time). Issue #4045. 2020-09-21 16:22:45 +00:00			`~DrvName();`

Offer suggestions for nix-env -i Closes https://github.com/NixOS/nix/issues/972 2021-11-18 13:32:52 +00:00			`bool matches(const DrvName & n);`
Don't recompile the same regex over and over 2014-10-03 19:29:20 +00:00
			`private:`
Don't include <regex> in header files This reduces compilation time by ~15 seconds (CPU time). Issue #4045. 2020-09-21 16:22:45 +00:00			`std::unique_ptr<Regex> regex;`
* Refactoring. 2004-02-06 14:49:41 +00:00			`};`

			`typedef list<DrvName> DrvNames;`

return string_views from forceString* once a string has been forced we already have dynamic storage allocated for it, so we can easily reuse that storage instead of copying. 2022-01-21 13:44:00 +00:00			`std::string_view nextComponent(std::string_view::const_iterator & p,`
			`const std::string_view::const_iterator end);`
			`int compareVersions(const std::string_view v1, const std::string_view v2);`
* Refactoring. 2004-02-06 14:49:41 +00:00			`DrvNames drvNamesFromArgs(const Strings & opArgs);`

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