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2022-08-30 r/4537 fix(tvix/eval): address various clippy lintsVincent Ambo6-41/+30
Change-Id: I3ea0f51475e80948adfeb5d1620c1f2665cc39bc Reviewed-on: https://cl.tvl.fyi/c/depot/+/6201 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 r/4536 feat(tvix/eval): implement attribute set equalityVincent Ambo1-2/+48
Change-Id: Ia25f02610f2575e5e7fca81643e05b40f4a07820 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6200 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-08-30 r/4535 fix(tvix/eval): `null` in dynamic attribute keys skips the elementVincent Ambo1-0/+7
This is actually *tested* behaviour in C++ Nix, so we need to implement it here, too. Change-Id: Ic4a4659a2f04cdd928cbe78a85dae90401515371 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6199 Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-08-30 r/4534 feat(tvix/eval): implement chunk disassembler outputVincent Ambo3-2/+35
This makes for a much nicer view of an execution if `--feature disassembler` is set, for example: tvix-repl> let value = [ 1 2 { a = 1; } ]; in value ++ [ 1 ] === compiled bytecode (11 operations) === 02 OpConstant(1) 02 OpConstant(2) 02 OpConstant("a") 02 OpConstant(1) 02 OpAttrs(1) 02 OpList(3) 02 OpGetLocal(0) 02 OpConstant(1) 02 OpList(1) 02 OpConcat 02 OpCloseScope(1) === runtime trace === 0001 OpConstant(ConstantIdx(0)) [ 1 ] 0002 OpConstant(ConstantIdx(1)) [ 1 2 ] 0003 OpConstant(ConstantIdx(2)) [ 1 2 "a" ] 0004 OpConstant(ConstantIdx(3)) [ 1 2 "a" 1 ] 0005 OpAttrs(1) [ 1 2 { a = 1; } ] 0006 OpList(3) [ [ 1 2 { a = 1; } ] ] 0007 OpGetLocal(0) [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] ] 0008 OpConstant(ConstantIdx(4)) [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] 1 ] 0009 OpList(1) [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } ] [ 1 ] ] 0010 OpConcat [ [ 1 2 { a = 1; } ] [ 1 2 { a = 1; } 1 ] ] 0011 OpCloseScope(1) [ [ 1 2 { a = 1; } 1 ] ] => [ 1 2 { a = 1; } 1 ] :: list Change-Id: If79c7fd1f0f18255ddb3763c1ba585fda8041b1b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6195 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-30 r/4533 feat(tvix/eval): implement optional runtime tracingVincent Ambo5-1/+67
This adds a `disassembler` feature to the crate configuration that traces the operations executed and the state of the stack at runtime. This can be enabled by compiling with `--feature disassembler`. This will also gain a more sensible layout of code slices eventually. Change-Id: I34c15e1cd346ecc4362b5afba6bf82dd49359d20 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6193 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-29 r/4529 feat(tvix/eval): emit warnings on useless inheritVincent Ambo2-1/+9
Change-Id: Ifb9993cf8b85393eb43e1b204c7ab2f889b7113b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6194 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-29 r/4528 fix(tvix/eval): skip inherit with no explicit parent in letVincent Ambo1-2/+7
Using `inherit` in a let-binding can not possibly have an effect, as the given identifier is already bound exactly the same way in the current scope. This introduces a subtle bug that is fixed later on, as there actually *is* a (single) condition where these inherits are meaningful. Change-Id: I8b24f0edcfe80db8153bb7e86cf478d36957d6f8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6192 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-29 r/4527 test(tvix/eval): add basic tests for let expressionsVincent Ambo6-0/+17
Change-Id: I788504f0c1848a1422c99006bf659738df614716 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6191 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 r/4524 feat(tvix/eval): add local identifier accessVincent Ambo4-1/+31
This makes basic `let ... in ...` statements work correctly. It does not yet account for the call frames pushed into the VM during function application. Change-Id: I67155171daf1a43011b96716dd9d1ab04b27db33 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6190 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 r/4523 feat(tvix/eval): detect dynamic identifier names in `let`Vincent Ambo2-4/+48
Nix does not allow dynamic identifiers in let expressions (only in attribute sets), but there are several different kinds of things it considers static identifiers. The functions introduced here put the path components of a let expression into normalised (string) form, and surface an error about dynamic keys if one is encountered. Change-Id: Ia3ebd95c6f3ed3cd33b94e156930d2e9c39b6cbf Reviewed-on: https://cl.tvl.fyi/c/depot/+/6189 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 r/4522 feat(tvix/eval): compile simple `let ... in ...` expressionsVincent Ambo3-0/+98
These expressions now leave the binding values on the stack, and clean up the scope after the body of the expression. While variable access is not yet implemented (as the identifier node remains unhandled), this already gives us the correct stack behaviour. Change-Id: I138c20ace9c64502c94b2c0f99a6077cd912c00d Reviewed-on: https://cl.tvl.fyi/c/depot/+/6188 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-28 r/4521 feat(tvix/eval): prepare structures for simulating locals stackVincent Ambo1-0/+24
These are going to be used during compilation of `let`-expressions to determine stack offsets for local variables. Change-Id: Ibb79f3f1ae86650303f88eacf623ae456458de87 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6187 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-08-28 r/4520 fix(tvix/eval): use path_clean instead of fs::canonicalize for pathsVincent Ambo3-10/+14
Canonicalisation performs much more functionality than what C++ Nix implements for paths, and causes some undesirable behaviour (e.g. handling non-existant files becomes difficult, but should be possible in literals). Instead, the path_clean crate provides a pure normalisation method. There is an intention to add this to Rust itself: https://github.com/rust-lang/rfcs/issues/2208 Change-Id: I775d238136db0a52cf6b12a68985833c8fb32882 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6186 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 r/4519 feat(tvix/eval): resolve relative path literalsVincent Ambo4-10/+37
Resolves relative paths (e.g. `./foo`) either relative to the location of the Nix file, or relative to the working directory if none is supplied. Change-Id: I70ec574657b221b458015117a004b6e4a9c25a30 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6185 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 r/4518 refactor(tvix/eval): implement error variant for path resolutionVincent Ambo2-7/+16
There are multiple things that can theoretically fail while resolving a path, as some of it includes I/O. A new error variant has been added for this and appropriate errors have been introduced. Change-Id: Ie222245425207dabbf203166eb5ed1eec0114483 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6184 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-28 r/4517 feat(tvix/eval): support absolute and home-anchored pathsVincent Ambo1-1/+32
These two paths are the easiest to handle, as they are simply built up from the components supplied in the text node and then normalised. Note that the normalisation of fs::canonicalize includes symlink resolution, which Nix does not actually do. We will need to fix that at some point. Change-Id: I54158f0684f197dd2a2583f7d0982d54c7619993 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6183 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-27 r/4516 chore(tvix/eval): add variant_size_differences warning to `Value`Vincent Ambo1-0/+1
Change-Id: I2f4719a81512a9a970edf22390afed490125bda7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6182 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-27 r/4515 feat(tvix/eval): add Path representation to Value enumVincent Ambo1-1/+4
Change-Id: I4827384201912131ea8fc2362188dcd862b94852 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6181 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-27 r/4514 refactor(tvix/eval): use `write!` macro instead of `f.write_fmt`Vincent Ambo2-8/+7
grfn pointed out in cl/6082 that this is actually the desugaring of the write! macro, so it doesn't make sense to write it out. Change-Id: If7c055b042ad22b034722aec1eaadba92736d684 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6180 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-27 r/4513 refactor(tvix/eval): rename Chunk::add_* functions to ::push_*Vincent Ambo2-55/+55
grfn pointed out in cl/6069 that naming them like this makes it clear that things are being added to the end of the state. Change-Id: I6a23215c4fef713869a3c85b0dde1ebbda7637e9 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6179 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-27 r/4512 chore(tvix/eval): explicitly set #[repr(transparent)] on wrappersVincent Ambo3-0/+3
For representation wrappers that are used to control the visibility of type internals, this ensures that the wrapper does not increase the size of the type. In practice, the optimiser likely does this anyways but it is good to guarantee it. Change-Id: Ic6df7d668fe6006dfbd5b6cfcfc2088afa95b810 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6178 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4511 test(tvix/eval): make sure all language tests also pass with C++ Nixsterni2-2/+121
Change-Id: I8428a82db9bf7af5c0273178acbf3e4d7355f5d9 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6153 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2022-08-26 r/4510 chore(tvix/eval): add variant_size_differences warning for OpCodeVincent Ambo1-0/+1
This makes it possible to quickly detect code errors that might blow up the size of the OpCode type. Change-Id: I7662dd0aa30c4762c0f9e4fa346418c9ca8b9994 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6177 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4508 feat(tvix/eval): add warning for deprecated URL literalsVincent Ambo2-6/+12
Change-Id: I8a9cfcb5d99680344ee0e3461a4a52526b846c92 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6175 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4507 feat(tvix/eval): add mechanism for emitting warnings from compilerVincent Ambo4-5/+39
These can be used predominantly to emit warnings about things that the compiler can infer, such as deprecated language features. Change-Id: I3649c625459d7f3f95cdf42d5c651d23d66569ec Reviewed-on: https://cl.tvl.fyi/c/depot/+/6174 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-08-26 r/4506 fix(tvix/compiler): handle literal URL valuesVincent Ambo1-1/+8
The parser creates this node type from literal URL values. Technically these are deprecated and have been removed from nixpkgs. Change-Id: I4d05034dd9b4d8348e4ed8a2bbb37c1b6ccef8bc Reviewed-on: https://cl.tvl.fyi/c/depot/+/6173 Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI
2022-08-26 r/4505 feat(tvix/eval): use rustyline crate for REPLVincent Ambo1-19/+49
This is a substantially nicer experience, immediately granting us history, proper exiting and so on. Change-Id: Iba4cb1713b9ac53d0799722bdbe2cd0e94a2f527 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6171 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-08-26 r/4504 chore(tvix/cargo): add dirs dependencyVincent Ambo2-0/+22
This crate provides sensible default locations for directories on different platforms. Change-Id: I0b61cc7f626dc6c8df903ba0f873be24e07d69b5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6170 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-08-26 r/4503 chore(tvix/cargo): add rustyline dependencyVincent Ambo2-0/+291
There's a few options for this, but this one seems fine in terms of features and doesn't have an insane amount of dependencies. Change-Id: Ief99e66bfee0ba0ba1cfdd09568b002121b7325b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6169 Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI
2022-08-26 r/4502 style(tvix/eval): minor rephrasing in a commentVincent Ambo1-1/+1
From cl/6070 Change-Id: I8ce8c1b40032d85cd2c01b04e225ae4a2842c7b7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6172 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4501 test(tvix/eval): add tests for the attrset `or` operatorVincent Ambo8-0/+8
Change-Id: I81f3ab94d8b987f5a4c87a27b2bcbb49cccee1ce Reviewed-on: https://cl.tvl.fyi/c/depot/+/6168 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4500 feat(tvix/compiler): implement `or` operator for attribute setsVincent Ambo1-2/+76
This operator allows for accessing attribute sets (including nested access) while also providing a default value. This is one of the more complex operations to compile, as it needs to keep track of a fairly large number of jumps that all need to be patched correctly. To make this easier to understand there's a small diagram included in the comments. Change-Id: Ia53bb20d8f779859bfd1692fa3f6d72af74c3a1f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6167 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4499 feat(tvix/vm): add opcodes for new Value::NotFound sentinelVincent Ambo3-3/+24
This sentinel value is going to be used for certain nested accesses into attribute sets. There is a new instruction similar to `OpAttrsSelect` which leaves the sentinel on the stack if a key is not found, instead of raising an error. Additionally, a new jump instruction makes its jump operation conditional on finding such a sentinel value. Change-Id: I2642f0a0bcc85bbe0ead68ea09a7dd794dbedeac Reviewed-on: https://cl.tvl.fyi/c/depot/+/6166 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4498 refactor(tvix/value): replace static representation with SmolStrVincent Ambo5-12/+15
The only uses of the static variant were for `"name"` and `"value"`, which are both small enough to fit into a SmolStr. The size of NixString accomodates `String` anyways, so we may as well inline them. Additionally smol_str is already in the dependency graph because rnix uses it, and using it for representations of identifiers is sensible. Change-Id: I9969312256d1657d69128e54c47dc7294a18ce58 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6165 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4497 chore(tvix/eval): implement improved Display for internal valuesVincent Ambo1-1/+2
Having these visible more explicitly is useful while debugging. Change-Id: I86b497883063d32792b635eb4514b7aeae484af4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6164 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4496 feat(tvix/eval): implement nested '?' operatorVincent Ambo1-13/+25
Implements the nested presence check operator for attribuet sets by traversing the chain of lookups through instructions that push/pop sequentially deeper attribute sets onto the stack. Note that this commit introduces a bug in case of nested attributes not being found, which is fixed in a later commit. Change-Id: Ic8b4c8648736f6cb048e3aa52592e4d075bf0544 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6163 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4495 feat(tvix/eval): implement `?` operator (single-level only)Vincent Ambo3-7/+50
This makes it possible to check things like `{} ? a` with a single level of nesting. Change-Id: I567c36fcfd2f9e2f60071acd3ebfe56dea59b26f Reviewed-on: https://cl.tvl.fyi/c/depot/+/6161 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-26 r/4494 feat(tvix/compiler): handle dynamic nodes for attribute accessVincent Ambo1-3/+4
Dynamic nodes (essentially unquoted interpolation) simply need to be unwrapped (and, hopefully, evaluate to a string). Example: `let key = "a"; in { a = 1; }.${key}` Change-Id: Idafd376e19d0e237151b7b6c26d97713beae5041 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6160 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4493 fix(tvix/compiler): support identifier literals in select expressionVincent Ambo1-1/+19
With this change, attribute set access is working as intended. Change-Id: Ic5dbbd68aa59156106069289e7375a696909f78b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6159 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4492 feat(tvix/eval): implement attribute set access operatorVincent Ambo5-4/+65
Fairly straightforward, handling the optimised representations manually and otherwise delegating to BTreeMap. Note that parsing of raw identifiers is not yet implemented. Encountering an identifier node usually means that there is locals access going on, so we need a special case for compiling a node in such a way that an identifier's literal value ends up on the stack. Change-Id: I13fbab7ac657b17ef3f4c5859fe737c321890c8a Reviewed-on: https://cl.tvl.fyi/c/depot/+/6158 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-26 r/4491 fix(tvix/eval): add operation to assert boolean typeVincent Ambo4-0/+24
This operation is required because both sides of the logical operators are strictly evaluated by Nix, even if the resulting value is not used further. For example, in our implementation of `&&`, if the left-hand side is `true`, then the result of the expression is simply the right-hand side value. This value must be asserted to be a boolean for the semantics of the language to work correctly. Change-Id: I34f5364f2a444753fa1d8b0a1a2b2d9cdf7c6700 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6157 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi>
2022-08-25 r/4489 feat(tvix/eval): Add initial benchmarking infrastructureGriffin Smith3-6/+574
Bootstrap some (initially very simple, mostly proof-of-concept) benchmarking infrastructure using Criterion, using the newly-exposed lib from tvix-eval. Change-Id: I4bb93c142ba8d018d7e67e58ac8907a0429398a5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6156 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Autosubmit: grfn <grfn@gws.fyi>
2022-08-25 r/4488 feat(tvix/eval): Expose interpret + related types from libGriffin Smith2-12/+15
Add a new `lib.rs` to tvix/eval, which `pub use`s the `interpret` function, and all types mentioned in its return type, and then uses *this* instead of direct `mod` statements in the `main.rs` to implement the entrypoints to the interpreter. This is in preparation for calling these functions from integrated benchmarking infrastructure using Criterion, though other things (like integration tests) might want to do that as well. Change-Id: I7b585134a96b1c56a2ac64d2036b0e51d321bd27 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6155 Reviewed-by: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Autosubmit: grfn <grfn@gws.fyi>
2022-08-25 r/4487 feat(tvix/compiler): implement `->` (implication) operatorVincent Ambo1-1/+21
Similar to `||`, but inverting the left-hand side. In other words, `a -> b` is essentially rewritten as `!a || b`. Change-Id: I8a62da65ff070b389e46048d047a54279060a97b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6152 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4486 feat(tvix/compiler): implement `||` operatorVincent Ambo3-6/+29
Same dance as `&&` but logically inverted. Change-Id: I213e200e3836527e9abe510f354ee7cd1f70d041 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6151 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4485 feat(tvix/compiler): implement `&&` operatorVincent Ambo1-7/+41
This logical operator is implemented in terms of jumping operations and thus requires slightly different treatment than other binary operators. Change-Id: Ib3d768b70dd7e16014c9b47d770aa74eec60ae92 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6150 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4484 docs(tvix/compiler): add a note on use of unwrap/expect for rnixVincent Ambo1-0/+12
Change-Id: I62ca28285685b69d1883afcf18c6068fc2defb5d Reviewed-on: https://cl.tvl.fyi/c/depot/+/6149 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4483 feat(tvix/eval): implement if/else expressionsVincent Ambo4-5/+84
These expressions use simple jumps to skip the correct expression conditionally in the bytecode by advancing the instruction pointer. Note that these expressions are already covered by a test behind the `nix_tests` feature flag, but adding more is probably sensible. Change-Id: Ibe0eba95d216321c883d3b6b5816e2ab6fe7eef1 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6148 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4482 refactor(tvix/value): hide internal string representationVincent Ambo2-13/+16
Wraps the string representation in an additional newtype struct with a private field in order to hide the representation from other modules. This is done in order to avoid accidental leakage of the internals outside of value::string. In fact, this caught a mistake in the compiler module which was directly constructing an internal variant. Change-Id: If4b627d3cff7ab9cd50ca1a3ac73245d4dcf7aef Reviewed-on: https://cl.tvl.fyi/c/depot/+/6147 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2022-08-25 r/4481 refactor(tvix/value): ensure internal attrs representation is hiddenVincent Ambo2-47/+53
Wraps the attrs representation in an additional newtype struct with a private field in order to hide the representation from other modules. This is done in order to avoid accidental leakage of the internals outside of value::attrs. Change-Id: I68d1d02514aa0443df4c39801001a3f1f6cc5d5c Reviewed-on: https://cl.tvl.fyi/c/depot/+/6146 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
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