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Change-Id: I6767c3a1a9654475b4066415f8c026b9c5b5907a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2382
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... and adds an example builtin which returns the current epoch.
The types introduced by this, especially in the interpreter module,
are going to be used for user-defined functions, too.
Change-Id: I0364a67241e94642cde08489ac711a340e30ebe8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2381
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This makes it possible to distinguish between literal and other
values, such as functions.
Change-Id: I4d87b96c2988e25a61eecfeeb56188fabfd0dc40
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2367
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I1836c73dbfd5fc4ca30c2d22bbffee2fb222d566
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2366
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I31a93efcc8e0c2bcb8549e2a2c05bb58d2dc74ca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2326
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Iee772274de95dfd6a6d4af973402859aeda17b1d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2325
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I1a7d0eda61f7f077b820dc0d2c2516e204966962
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2324
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Ic6aed29bec42098eb07e1ba9eb01dbcaae8d11e3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2322
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: I2352d75a3f02d65a5a2d04fb2cc4daa50f11ca1e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2321
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: Ia4c4ef330be431a344d42bc00d3a518825fb9399
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2305
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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This is currently a bit hacky because of the environment
wrapping/unwrapping, will refactor this to just keep a single Rc
around instead.
Change-Id: Iad1cbbe35112d0329248d4655a09260fc60644c8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2304
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: I1b7235ed71fa36120984a36f22cd564f59581352
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2303
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I6f21b246eb9d3bf760edb3220ce6be5de5b05b08
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2302
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Adds scoped environments using a sophisticated structure known as an
SRPT, which stands for "shitty parent pointer tree".
Change-Id: I62f66aabe6eb32ea01c4cabcca5b03cfefcc28ee
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2301
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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So that:
> var a = 15;
> b = 12;
Error in program: Error { line: 0, kind: UndefinedVariable("b") }
> a = 12; print a;
Number(12.0)
Change-Id: I687e95ccc2d3084e39a71bd452656ae981c95191
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2300
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I56db10a5ac26958ae27a8d4c8fa7b8f8285bc7e1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2299
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Id60760e241ad0e45871b48e499f58e9831d57316
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2298
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: I4134cf78dc3934a517ad0c848ae1d3729abaf882
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2297
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
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Change-Id: I9894d76716d739e85a4757d9e658f884228e7f52
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2290
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I873fdd53319ec36da18926d9477e809a69dbace7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2288
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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First part of
https://craftinginterpreters.com/statements-and-state.html
Supports print statements, as well as evaluation for the sake of
it (i.e. future side-effects).
Change-Id: Ic6653b568f98d6cfe3f297615b7113c0ba1d9a70
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2287
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I0d52bc9ff5be6421cb4131265ed28ce1ea7d8ff3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2282
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This is only a subset of the Lox spec so far. It implements the
language up to the runtime error chapter on
https://craftinginterpreters.com/evaluating-expressions.html
Change-Id: I295dbf4b6544420d6fe80b6aaba661fb21acdea6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2281
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This lets the parser collect multiple errors instead of returning
after the first one, with some optimistic synchronisation after
encountering something that looks wonky.
Change-Id: Ie9d0ce8de9dcc7a3d1e7aa2abe15f74cab0ab96b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2236
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I940448c63ce105d53a0f281b6320ffb01378f207
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2235
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I0e6bd71fd787b719104ef93fc52df4090dc415b9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2234
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I7ae3d721f76d8d69043f5ed077abbc70a18cbd92
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2233
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... with the exception of parenthesised expressions, because error
threading is not implemented yet.
Change-Id: I8d455d85e647548d5b71cbfd3d078f4970dab7fb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2232
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... mostly some AST boilerplate and a first top-level rule, plus
boilerplate similar to that set up in the Scanner.
Change-Id: I605d1de23c47a3b3702ab4f62cd3371bc3988c7d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2194
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... and show them to users, very crudely.
Change-Id: If4491b14db1124313f6ab7e5fbfdce9fea501d11
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2193
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Ifec627605c23c25f199d47eaa91e441ed9590208
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2192
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Ide0126d1c2274d56903092816ff9cd531c03f513
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2191
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Note that Lox does not support escapes, and I don't care about that.
Change-Id: Ie848cbc1164c4b005b15e29aad8fe723aaa68d1b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2190
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I8acc5b0d07b2c656f9bba76a6ddac6b9088ea563
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2189
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Iead3efa6aa797af5c5b57c67226205bf7e39e647
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2188
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: I2efafdb1374ac2863a1f8d8a9310123a7dec0900
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2187
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... they're just noisy at the moment. This isn't complete because it
doesn't thread through scanner errors.
Change-Id: I0f75d2b20fa3f57be1af5d1d8aa8059856855825
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2162
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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Change-Id: Ic5a246a7f5834477aeb97824fa30ba74a8422bc1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2161
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This makes it easier to work with the Unicode issue. The original
string representation can be discarded.
Change-Id: I740be4cb9654679ea7950f3899c5c709b1e7a739
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2160
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... still not that interesting, but at this point slightly divergent
from the book:
The book embraces mutability for interpreter state, initially for
tracking whether an error condition has occured.
I avoid this by instead defining an error type and collecting the
error values, to be handled later on.
Notes: So far nothing special, but this is just the beginning of the
book. I like the style it is written in and it has pointed to some
interesting resources, such as a 1965 paper titled "The Next 700
Languages".
Change-Id: I030b38438fec9eb55372bf547af225138908230a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2144
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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... as well as a Nix derivation, because why not.
Change-Id: Iaf2591ab72676fe0732c3f807b3aa0cff13fb4ef
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2143
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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This is going to be the first of two interpreters from "Crafting
Interpreters".
Change-Id: I354ddd2357444648d0245f35d92176dd176525d8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2142
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
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