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2022-10-15 r/5133 fix(tvix/eval): bring foldl' strictness in line with C++ Nixsterni5-0/+9
Working on https://github.com/NixOS/nix/pull/7158, I discovered that C++ Nix actually is strict in the accumulator, just not in the first value. This seems due to the fact that in the C++ evaluator, function calls don't seem to be thunked unconditionally and foldl' just elects not to wrap it in a thunk (don't quote me on this summary, even though it seems to line up with the code for primop_foldlStrict and testable behavior). It doesn't seem worth it to risk breaking the odd Nix expression just to be strict in one more value per invocation of foldl' (i.e. the initial accumulator value `nul`), so let's match the existing C++ Nix behavior here. Change-Id: If59e62271a90d97cb440f0ca72a58ec7840d1690 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7022 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-15 r/5132 feat(tvix/eval): implement builtins.dirOfAdam Joseph2-0/+11
This commit causes the test eval-okay-builtins.nix to pass. It also adds tests/tvix_tests/eval-okay-dirof.nix which has better coverage than the nix tests for this builtin. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I71d96b48680696fd6e4fea3a9861742b35cfaa66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6987 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-13 r/5125 feat(tvix/eval): implement builtins.baseNameOfAdam Joseph2-0/+11
This commit implements builtins.baseNameOf and adds a test case eval-okay-basenameof.nix to the test suite. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: Ib8bbafba2ac9ca0e1d3dc5e844167f94890d9fee Reviewed-on: https://cl.tvl.fyi/c/depot/+/6997 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-10-13 r/5124 fix(tvix/eval): parseDrvName should not coerce, and xfail testAdam Joseph1-0/+1
builtins.parseDrvName should not coerce its argument to a string. This commit fixes that oversight in my previous commit, and adds an xfail test to cover this condition. Thanks to @sterni for noticing this. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I76bc78f1a82e1e08fe5c787c563a221d55de2639 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6991 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-10-13 r/5123 feat(tvix/eval): enable the XFAIL testsAdam Joseph2-14/+45
This commit adds support for running the "expected failure" tests in both the nix and tvix test suites. I have disabled the eval-fail-blackhole.nix test because it gets stuck running forever. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: Iba75ce6c8f2becab3c834fcfdd9f4fdc5a4bdb9f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6990 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: grfn <grfn@gws.fyi>
2022-10-13 r/5122 test(tvix/eval): update for cppnix PR #7149Adam Joseph1-0/+3
cppnix has merged #7149, so let's update our copy of their tests: https://github.com/NixOS/nix/pull/7149 Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I0be3bf9da937abd24102e1997daa2087ecfafd98 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6992 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-13 r/5117 feat(tvix/eval): allow to disable warningsAdam Joseph1-2/+3
The nix_tests test suite produces lots of warnings. We can't fix these, since they are kept in sync with upstream, so there's little point in cluttering up the console with them every time the tests are run. Let's add a clap flag "warnings" and TVIX_WARNINGS environment variable. The default is "true". The test runner overrides this default and mutes the warnings. Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I4b065f96fe15838afcca6970491a54e248ae4df7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6985 Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-12 r/5115 test(tvix/eval): add eval-okay-parsedrvname.{exp,nix}Adam Joseph2-0/+13
Signed-off-by: Adam Joseph <adam@westernsemico.com> Change-Id: I59254a0ac513b3d2a6b2184554358bb6eba2ba99 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6949 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-11 r/5105 fix(tvix/eval/builtins): force acc not list element in foldl'sterni2-0/+9
When investigating discrepancies between foldl' in tvix and C++ Nix, I discovered that C++ Nix's foldl' doesn't seem to be strict at all. Since this seemed wrong, I looked into Haskell's foldl' implementation which doesn't force the list elements (`val` in our code), but the accumulation value (`res` in our code). You can look at the code here: https://hackage.haskell.org/package/base-4.17.0.0/docs/src/GHC.List.html#foldl%27 This actually makes a lot of sense: If `res` is not forced after each application of `op`, we'll end up thunks nested as deeply as the list is long, potentially taking up a lot of space. This can be limited by forcing the `res` thunk before applying `op` again (and creating a new thunk). I've also PR-ed an equivalent change for C++ Nix at https://github.com/NixOS/nix/pull/7158. Since this is not merged nor backported to our Nix 2.3 fork, I've not copied the eval fail test yet, since it wouldn't when checking our tests against C++ Nix in depot. Change-Id: I34edf6fc3031fc1485c3e714f2280b4fba8f004b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6947 Autosubmit: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-11 r/5102 feat(tvix/eval): Implement builtins.removeAttrsGriffin Smith3-0/+11
Change-Id: I28910991a0108436a42ac7bf3458f9180a44154e Reviewed-on: https://cl.tvl.fyi/c/depot/+/6928 Reviewed-by: Adam Joseph <adam@westernsemico.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-11 r/5100 fix(tvix/eval): Pop frames even if running op failsGriffin Smith2-1/+2
Previously, the VM assumed that if an error was returned from `run()`, the evaluation was "finished" and the state of the VM didn't matter. This used to be a reasonable assumption, but now that we've got `tryEval` around we need to actually make sure that we clean up after ourselves if we're about to return an error. Specifically, if the *last* instruction in an evaluation frame returns an error, we previously wouldn't pop that evaluation frame, which could cause all sorts of bizarre errors based on what happened to be in the stack at the time. This commit splits out a `run_op` method from `VM::run`, and uses that to check the evaluation frame return condition even if the op we're running is about to return an error, and pop the evaluation frame if we're at the last instruction. Change-Id: Ib40649d8915ee1571153cb71e3d76492542fc3d7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6940 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-10 r/5095 feat(tvix/eval): Implement builtins.readFileGriffin Smith2-0/+2
Change-Id: If3fd0b087009a2bfbad8bb7aca0aa20de906eb12 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6921 Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com> Reviewed-by: kanepyork <rikingcoding@gmail.com> Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-10 r/5091 fix(tvix/eval): path resolution errors are catchableGriffin Smith2-1/+2
Despite this not being documented, `tryEval` is empirically able to catch errors caused by a <...> path not resolving (and nixpkgs depends on this). Change-Id: Ia3b78a2d9d2d0c603aba829518b351102dc55396 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6926 Reviewed-by: sterni <sternenseemann@systemli.org> Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-10 r/5090 fix(tvix/eval): Thunk `if` exprGriffin Smith2-0/+7
Since the body of an `if` expr can refer to deferred upvalues, it needs to be thunked so when we actually compile those deferred upvalues we have something for the finalize op to point at. Without this all sorts of weird things can happen due to the finalize op being run in the wrong lambda context, up to and including a panic. Change-Id: I040d5e1a7232fd841cfa4953539898fa49cbbb83 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6929 Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: tazjin <tazjin@tvl.su> Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-10 r/5089 feat(tvix/eval): Implement builtins.tryEvalGriffin Smith2-0/+6
With asserts compiled using conditional jumps, this ends up being quite straightforward - the only real tricky bit is that we have to know whether an error can or can't be handled. Change-Id: I75617da73b7a9c5cdd888c0e26ae81d2c5c0d714 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6924 Reviewed-by: sterni <sternenseemann@systemli.org> Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-10-10 r/5088 feat(tvix/eval): Implement builtins.pathExistsGriffin Smith2-0/+3
Change-Id: Ife8a690e9036868964771893ab29a9ae3a2d2365 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6919 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5085 feat(tvix/eval): Allow adding strings to pathsGriffin Smith2-0/+10
Implement adding paths and strings via OpAdd. Since the nix rules are quite obscure, I'm electing to test this one with an oracle test to avoid the danger of getting the actual asserted result wrong. Change-Id: Icdcca3690ca2e8459e386c1f29cc48eaaa39e9a3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6914 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5084 feat(tvix/eval): Implement builtins.concatStringsSepGriffin Smith2-0/+9
Change-Id: I6e46bcdbf3b5258b60edb017709fee577eb8ec74 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6907 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5083 feat(tvix/eval): Support builtins.readDirWilliam Carroll4-0/+2
Co-authored-by: Griffin Smith <root@gws.fyi> Change-Id: I5ff19efbe87d8f571f22ab0480500505afa624c5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6552 Autosubmit: wpcarro <wpcarro@gmail.com> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5080 feat(tvix/eval): Implement builtins.elemGriffin Smith3-0/+68
Change-Id: Id99c1d33f87ad9866990d3483d3531e9e48f861f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6916 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5076 feat(tvix/eval): Implement builtins.foldl'Griffin Smith2-0/+6
Change-Id: Ibc97db4343cb3a1a1677f69fb6c3518c61978aad Reviewed-on: https://cl.tvl.fyi/c/depot/+/6906 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-10 r/5075 feat(tvix/eval): Implement builtins.genListGriffin Smith2-0/+2
Change-Id: Iabe28656229f508226b244d81382e517961eb3cf Reviewed-on: https://cl.tvl.fyi/c/depot/+/6901 Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-10 r/5074 feat(tvix/eval): Implement builtins.concatMapGriffin Smith2-0/+2
Change-Id: I08bfd040a242aa43b64760c19f48a28303f206ac Reviewed-on: https://cl.tvl.fyi/c/depot/+/6900 Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-09 r/5073 feat(tvix/eval): Implement builtins.listToAttrsGriffin Smith2-0/+16
Implement the listToAttrs builtin, which constructs an attribute set from a list of attribute sets with keys name and value. This is tested using an adaptation of the nix `eval-ok-listtoattrs.nix`, with the utilities from `lib.nix` inlined. Change-Id: Ib5bf743466dda9722c2c1e00797df4b58448cf0f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6894 Autosubmit: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-10-08 r/5069 fix(tvix/eval): end scope after compiling legacy let bindingsVincent Ambo2-0/+2
When contrasting the compilation of the desugared version to the "sugared" version, this was the noticeable difference. This fixes b/203. Change-Id: Iae02ffc56e06de1de091b84cdc59d8fe83a17d69 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6898 Reviewed-by: grfn <grfn@gws.fyi> Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-08 r/5068 feat(tvix/tests): Import default.nix inside directoryGriffin Smith4-1/+7
This requires actually passing the source directory into `interpret` in the eval tests, but otherwise this is fairly straightforward - if we're trying to import a directory, just push `default.nix` onto it and import that instead. Change-Id: I0b7d4234f81977e78d14dfa651bf0cf9721017e5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6893 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-10-08 r/5066 fix(tvix/eval): Force thunks when comparing against ground valsGriffin Smith2-1/+5
Thunks correctly force when comparing for equality against other thunks, but weren't being forced correctly when comparing against non-thunk values, in either direction. Change-Id: Ia03702895ec4d70aed3445c1b0a9a7a641d1a300 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6897 Autosubmit: grfn <grfn@gws.fyi> Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI
2022-10-05 r/5038 feat(tvix/eval): implement tvix's user-agent, err, nixVersionVincent Ambo2-0/+6
nixpkgs has hardcoded references to Nix versions, we need to provide it with something that looks like a Nix version while actually being a Tvix version. For now, we do this by stealing a trick out of the browser book and constructing a version that looks like a Nix version to Nix, but like a Tvix version to people who know what they are looking for. Nevermind that we don't actually have any kind of versioning for Tvix (yet?), other than depot revisions. Change-Id: I7ce8079dd8164a2079891d38e707f09a45f0bbc1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6858 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-10-03 r/5024 feat(tvix/eval): implement `builtins.any`Vincent Ambo2-0/+16
Change-Id: I640ee20e7c0a68c4e024a577e429fed9b3a49ece Reviewed-on: https://cl.tvl.fyi/c/depot/+/6845 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-10-03 r/5023 feat(tvix/eval): implement `builtins.all`Vincent Ambo2-0/+16
Change-Id: I19ec2b2194681efd73041f4aa1e5f2c893e839c2 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6844 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-10-03 r/5022 feat(tvix/eval): implement builtins.concatListsVincent Ambo2-0/+7
Concatenates (but not flattens) a list of lists. Change-Id: I692e0b3e7b5a5ff93d5768d3a27849b432ec5747 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6843 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-10-03 r/5019 feat(tvix/eval): implement tail-calling of __functor attributesVincent Ambo2-0/+2
This implements __functor calling in situations where `OpTailCall` is used, but not yet for `OpCall`. For some reason I have not yet figured out, this same implementation does not work in call_value, which means that it also doesn't yet work in builtins that apply functions. Change-Id: I378f9065ac53d4c05166a7d0151acb1f55c91579 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6826 Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-30 r/5006 fix(tvix/eval): fix thunk borrowing error in force_for_outputVincent Ambo2-0/+5
This function previously kept a borrow in the form of the `Thunk::value` result alive while performing arbitrary actions in the VM, which caused a borrowing error in the test case attached. The `Ref` value must never be used in cases where control flow is passed to other parts of the VM. Change-Id: I41d10aa1882a2166614b670e8ba77aab0e67deca Reviewed-on: https://cl.tvl.fyi/c/depot/+/6825 Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-30 r/5005 test(tvix/eval): add simple nested key tests in let & rec attrsVincent Ambo4-0/+10
Change-Id: Icdc41ae383cd7cd1531c65c97d955bc59a56489a Reviewed-on: https://cl.tvl.fyi/c/depot/+/6809 Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-30 r/5003 test(tvix/eval): reactivate nested key tests in plain attribute setsVincent Ambo9-0/+0
Change-Id: Id25cde5a6562e1598dcbbf7945ecdfacac5faed7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6807 Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-29 r/4997 feat(tvix/eval): merge attribute sets in bindingsVincent Ambo4-0/+23
This is a significant step towards correctly implemented nested bindings. All attribute sets defined within the same binding scope will now be merged as in Nix, if they use the same key. Change-Id: I13e056693d5e73192280043c6dd93b47d1306ed6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6800 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-29 r/4989 refactor(tvix/eval): merge all bindings creation logicVincent Ambo11-2/+2
As of this commit, all three types of bindings scopes are compiled the same way (i.e. compilation of non-recursive attribute sets has been switched over to the new code paths). This sets us up for doing the final implementation of nested attribute sets. HOWEVER, this breaks the existing implementation of nested attributes in non-recursive attribute sets. That implementation is flawed and unworkable in practice, so we need to do this dance to be able to implement it correctly. Change-Id: Iba2545c0d1d6b51f5e1a31a5d005b8d01da546d3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6782 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-29 r/4988 feat(tvix/eval): implement dynamic keys in recursive attrsVincent Ambo2-0/+6
This wires up the new bindings setup logic to be able to thread through & compile dynamic attributes in recursive attrs. It seems like we don't actually need to retain the phasing of Nix exactly, as we can use the phantom mechanism to declare all locals without making the dynamic ones accessible. Change-Id: Ic2d43dd8fd97d7ccd56d8c6adf2ff97274cd837a Reviewed-on: https://cl.tvl.fyi/c/depot/+/6781 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-09-23 r/4963 feat(tvix/eval): implement 'builtins.filter'Vincent Ambo2-0/+14
This is a little ugly because the plain Iterator::filter method can not be used (it does not support fallible primitives), so we need to resort to an `Iterator::filter_map` and deal with the wrapping in Options everywhere. This prevents use of `?` which introduces the need for some matching, but it's not *too* bad. Change-Id: Ie2c3c0c9756c4c627176f64fb4e0054e717c26d1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6765 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-22 r/4962 fix(tvix/eval): manually count entries in recursive scopesVincent Ambo2-0/+2
The previous version had a bug where we assumed that the number of entries in an attribute set AST node would be equivalent to the number of entries in the runtime attribute set, but due to inherit nodes containing a variable number of entries, this did not work out. Fixes b/199 Change-Id: I6f7f7729f3512b297cf29a2e046302ca28477854 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6749 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-22 r/4961 feat(tvix/eval): add builtins.stringLengthsterni2-0/+11
Fairly straightforward, only thing of note is that we coerce (weakly) to string here as well. Change-Id: I03b427e657e402f1f9eb0f795b689bbf5092aba1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6745 Tested-by: BuildkiteCI Reviewed-by: wpcarro <wpcarro@gmail.com> Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-22 r/4960 fix(tvix/eval): handle thunks in arithmetic builtinssterni8-4/+8
The simplest solution seems to be to pass references to arithmetic_op!() which avoids the moving annoyance we had to deal with in the builtins (no more popping!). We then use .force() to force the values and dereference any Thunks (which arithmetic_op! doesn't do for us). Change-Id: I0eb8ad60e80a0b3ba9d9f411e973ef8bcf136989 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6724 Tested-by: BuildkiteCI Reviewed-by: wpcarro <wpcarro@gmail.com> Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-22 r/4959 test(tvix/eval): add a test for accessing "strange" identifiersVincent Ambo2-0/+9
Because `inherit` can take string identifiers, we can access arbitrarily weird identifiers in scopes using it. Change-Id: Ic868233221befa160538dd2ffaff1cc7f566585a Reviewed-on: https://cl.tvl.fyi/c/depot/+/6748 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-22 r/4958 fix(tvix/eval): support string identifiers in inheritsVincent Ambo2-0/+8
This updates rnix-parser to a version where inherits provide an iterator over `ast::Attr` instead of `ast::Ident`, which mirrors the behaviour of Nix (inherits can have (statically known) strings as their identifiers). This actually required some fairly significant code reshuffling in the compiler, as there was an implicit assumption in many places that we would have an `ast::Ident` node available when dealing with variable access (which is then explicitly only not true in this case). Change-Id: I12f1e786c0030c85107b1aa409bd49adb5465546 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6747 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-22 r/4957 test(tvix/eval): test word behavior in builtins.compareVersionssterni2-1/+6
We delegate to Rust std's Ord trait, so we should at least do a sanity check here. Change-Id: I9596068f8ab3e51b79602de0bac79af6d558086e Reviewed-on: https://cl.tvl.fyi/c/depot/+/6723 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-22 r/4955 feat(tvix/eval): Support builtins.lessThanWilliam Carroll2-0/+16
Extend and export the `cmp_op`, and this becomes trivial. Change-Id: I9c93fa4db0f5a1fc8b56928ea144676f79247de1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6557 Autosubmit: wpcarro <wpcarro@gmail.com> Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-09-21 r/4952 test(tvix/eval): add more compareVersions test cases involving presterni2-1/+7
This asserts the not-quite lexicographical property of the comparison. Change-Id: Iad68081e4b3a7106513f479643de87065dc47739 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6721 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-21 r/4951 test(tvix/eval): add more compareVersions cases from C++ Nixsterni2-1/+15
Change-Id: I25e7e7a2c547d0874e1e949bf96e6e066b1075ed Reviewed-on: https://cl.tvl.fyi/c/depot/+/6705 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-09-21 r/4948 test(tvix/eval): add test cases for builtins.splitVersionsterni2-0/+14
Change-Id: I60648f6c5cea34d19afb5ced3e98051201190a78 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6711 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-09-20 r/4943 refactor(tvix/eval): add VM::call_value helper methodVincent Ambo2-1/+4
This makes it possible to call a callable value (builtin or closure/lambda) directly, without unwrapping it first. This is needed for pretty much all higher-order functions to work correctly. This is mostly equivalent to the previous code in coerce_to_string for calling `__toString`, except it expects the argument(s) to already be placed on the stack. Note that the span for the `NotCallable` error is not currently guaranteed to make any sense, will experiment with this. Change-Id: I821224368d438a28900858b343defc1817e46a0a Reviewed-on: https://cl.tvl.fyi/c/depot/+/6717 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>