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lix/tests/plugins/plugintest.cc

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Modularize config settings Allow global config settings to be defined in multiple Config classes. For example, this means that libutil can have settings and evaluator settings can be moved out of libstore. The Config classes are registered in a new GlobalConfig class to which config files etc. are applied. Relevant to https://github.com/NixOS/nix/issues/2009 in that it removes the need for ad hoc handling of useCaseHack, which was the underlying cause of that issue.
2018-03-27 16:41:31 +00:00
#include "config.hh"
Add plugins to make Nix more extensible. All plugins in plugin-files will be dlopened, allowing them to statically construct instances of the various Register* types Nix supports.
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#include "primops.hh"
using namespace nix;
Modularize config settings Allow global config settings to be defined in multiple Config classes. For example, this means that libutil can have settings and evaluator settings can be moved out of libstore. The Config classes are registered in a new GlobalConfig class to which config files etc. are applied. Relevant to https://github.com/NixOS/nix/issues/2009 in that it removes the need for ad hoc handling of useCaseHack, which was the underlying cause of that issue.
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struct MySettings : Config
{
Setting<bool> settingSet{this, false, "setting-set",
Allow plugins to define new settings.
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"Whether the plugin-defined setting was set"};
Modularize config settings Allow global config settings to be defined in multiple Config classes. For example, this means that libutil can have settings and evaluator settings can be moved out of libstore. The Config classes are registered in a new GlobalConfig class to which config files etc. are applied. Relevant to https://github.com/NixOS/nix/issues/2009 in that it removes the need for ad hoc handling of useCaseHack, which was the underlying cause of that issue.
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};
MySettings mySettings;
Allow plugins to define new settings.
2018-02-13 19:43:32 +00:00
Modularize config settings Allow global config settings to be defined in multiple Config classes. For example, this means that libutil can have settings and evaluator settings can be moved out of libstore. The Config classes are registered in a new GlobalConfig class to which config files etc. are applied. Relevant to https://github.com/NixOS/nix/issues/2009 in that it removes the need for ad hoc handling of useCaseHack, which was the underlying cause of that issue.
2018-03-27 16:41:31 +00:00
static GlobalConfig::Register rs(&mySettings);
Allow plugins to define new settings.
2018-02-13 19:43:32 +00:00
replace most Pos objects/ptrs with indexes into a position table Pos objects are somewhat wasteful as they duplicate the origin file name and input type for each object. on files that produce more than one Pos when parsed this a sizeable waste of memory (one pointer per Pos). the same goes for ptr<Pos> on 64 bit machines: parsing enough source to require 8 bytes to locate a position would need at least 8GB of input and 64GB of expression memory. it's not likely that we'll hit that any time soon, so we can use a uint32_t index to locate positions instead.
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static void prim_anotherNull (EvalState & state, const PosIdx pos, Value ** args, Value & v)
Add plugins to make Nix more extensible. All plugins in plugin-files will be dlopened, allowing them to statically construct instances of the various Register* types Nix supports.
2018-02-08 16:26:18 +00:00
{
Modularize config settings Allow global config settings to be defined in multiple Config classes. For example, this means that libutil can have settings and evaluator settings can be moved out of libstore. The Config classes are registered in a new GlobalConfig class to which config files etc. are applied. Relevant to https://github.com/NixOS/nix/issues/2009 in that it removes the need for ad hoc handling of useCaseHack, which was the underlying cause of that issue.
2018-03-27 16:41:31 +00:00
if (mySettings.settingSet)
Remove non-method mk<X> functions
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v.mkNull();
Allow plugins to define new settings.
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else
Remove non-method mk<X> functions
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v.mkBool(false);
Add plugins to make Nix more extensible. All plugins in plugin-files will be dlopened, allowing them to statically construct instances of the various Register* types Nix supports.
2018-02-08 16:26:18 +00:00
}
Allow plugins to define new settings.
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static RegisterPrimOp rp("anotherNull", 0, prim_anotherNull);
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