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* 5001 - drop the :(scenario) DSLKartik Agaram2019-03-121-122/+147
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've been saying for a while[1][2][3] that adding extra abstractions makes things harder for newcomers, and adding new notations doubly so. And then I notice this DSL in my own backyard. Makes me feel like a hypocrite. [1] https://news.ycombinator.com/item?id=13565743#13570092 [2] https://lobste.rs/s/to8wpr/configuration_files_are_canary_warning [3] https://lobste.rs/s/mdmcdi/little_languages_by_jon_bentley_1986#c_3miuf2 The implementation of the DSL was also highly hacky: a) It was happening in the tangle/ tool, but was utterly unrelated to tangling layers. b) There were several persnickety constraints on the different kinds of lines and the specific order they were expected in. I kept finding bugs where the translator would silently do the wrong thing. Or the error messages sucked, and readers may be stuck looking at the generated code to figure out what happened. Fixing error messages would require a lot more code, which is one of my arguments against DSLs in the first place: they may be easy to implement, but they're hard to design to go with the grain of the underlying platform. They require lots of iteration. Is that effort worth prioritizing in this project? On the other hand, the DSL did make at least some readers' life easier, the ones who weren't immediately put off by having to learn a strange syntax. There were fewer quotes to parse, fewer backslash escapes. Anyway, since there are also people who dislike having to put up with strange syntaxes, we'll call that consideration a wash and tear this DSL out. --- This commit was sheer drudgery. Hopefully it won't need to be redone with a new DSL because I grow sick of backslashes.
* 4266 - space for alloc-id in heap allocationsKartik Agaram2018-06-241-24/+45
| | | | This has taken me almost 6 weeks :(
* 4258 - undo 4257Kartik Agaram2018-06-151-45/+24
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* 4257 - abortive attempt at safe fat pointersKartik Agaram2018-06-151-24/+45
| | | | | | | | | | | | | | | | I've been working on this slowly over several weeks, but it's too hard to support 0 as the null value for addresses. I constantly have to add exceptions for scalar value corresponding to an address type (now occupying 2 locations). The final straw is the test for 'reload': x:num <- reload text 'reload' returns an address. But there's no way to know that for arbitrary instructions. New plan: let's put this off for a bit and first create support for literals. Then use 'null' instead of '0' for addresses everywhere. Then it'll be easy to just change what 'null' means.
* 4179 - experiment: rip out memory reclamationKartik K. Agaram2018-01-031-4/+4
| | | | | | | | | | | | | | | | | | | | | I have a plan for a way to avoid use-after-free errors without all the overheads of maintaining refcounts. Has the nice side-effect of requiring manual memory management. The Mu way is to leak memory by default and build tools to help decide when and where to expend effort plugging memory leaks. Arguably programs should be distributed with summaries of their resource use characteristics. Eliminating refcount maintenance reduces time to run tests by 30% for `mu edit`: this commit parent mu test: 3.9s 4.5s mu test edit: 2:38 3:48 Open questions: - making reclamation easier; some sort of support for destructors - reclaiming local scopes (which are allocated on the heap) - should we support automatically reclaiming allocations inside them?
* 4106Kartik K. Agaram2017-11-031-1/+1
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* 3987Kartik K. Agaram2017-09-011-2/+2
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* 3966Kartik K. Agaram2017-07-091-1/+1
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* 3937Kartik K. Agaram2017-06-221-4/+8
| | | | | Fix screen-checking functions to handle fake screen after scrolling. I can't believe I forgot about this during commit 3882.
* 3907 - standardize test failure messagesKartik K. Agaram2017-06-151-24/+17
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* 3877Kartik K. Agaram2017-05-261-2/+2
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* 3643Kartik K. Agaram2016-11-071-1/+1
| | | | | Standardize on calling literate waypoints "Special-cases" rather than "Cases". Invariably there's a default path already present.
* 3561Kartik K. Agaram2016-10-221-2/+2
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* 3531Kartik K. Agaram2016-10-201-2/+2
| | | | | Be consistent in checking for Scenario_testing_scenario when signalling that a Mu scenario failed.
* 3522Kartik K. Agaram2016-10-191-3/+3
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* 3503Kartik K. Agaram2016-10-151-7/+7
| | | | | Undo commit 3500; turns out we need the duplicate scenario names for good test failure messages.
* 3501Kartik K. Agaram2016-10-151-2/+2
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* 3500Kartik K. Agaram2016-10-151-7/+7
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* 3429 - standardize Mu scenariosKartik K. Agaram2016-09-281-19/+19
| | | | | | | | | | | | | A long-standing problem has been that I couldn't spread code across 'run' blocks because they were separate scopes, so I've ended up making them effectively comments. Running code inside a 'run' block is identical in every way to simply running the code directly. The 'run' block is merely a visual aid to separate setup from the component under test. In the process I've also standardized all Mu scenarios to always run in a local scope, and only use (raw) numeric addresses for values they want to check later.
* 3393Kartik K. Agaram2016-09-171-4/+4
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* 3390Kartik K. Agaram2016-09-171-2/+2
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* 3389Kartik K. Agaram2016-09-171-9/+9
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* 3385Kartik K. Agaram2016-09-171-1/+1
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* 3379Kartik K. Agaram2016-09-171-18/+18
| | | | Can't use type abbreviations inside 'memory-should-contain'.
* 3374Kartik K. Agaram2016-09-161-2/+2
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* 3273Kartik K. Agaram2016-08-281-5/+5
| | | | | | | | | | | Undo 3272. The trouble with creating a new section for constants is that there's no good place to order it since constants can be initialized using globals as well as vice versa. And I don't want to add constraints disallowing either side. Instead, a new plan: always declare constants in the Globals section using 'extern const' rather than just 'const', since otherwise constants implicitly have internal linkage (http://stackoverflow.com/questions/14894698/why-does-extern-const-int-n-not-work-as-expected)
* 3272Kartik K. Agaram2016-08-281-3/+3
| | | | | | Move global constants into their own section since we seem to be having trouble linking in 'extern const' variables when manually cleaving mu.cc into separate compilation units.
* 3251Kartik K. Agaram2016-08-251-6/+45
| | | | | Replace some asserts when checking scenario screens with better error messages.
* 3250Kartik K. Agaram2016-08-251-3/+6
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* 3229 - fake file systems using 'assume-filesystem'Kartik K. Agaram2016-08-201-4/+5
| | | | Built with Stephen Malina.
* 3226Kartik K. Agaram2016-08-181-3/+3
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* 3178Kartik K. Agaram2016-08-131-0/+5
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* 3126Kartik K. Agaram2016-07-221-8/+2
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* 3120Kartik K. Agaram2016-07-211-0/+7
| | | | | | | | Always show instruction before any transforms in error messages. This is likely going to make some errors unclear because they *need* to show the original instruction. But if we don't have tests for those situations did they ever really work?
* 3108Kartik K. Agaram2016-07-101-0/+3
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* 3025 - fix a minor annoyance in edit/Kartik K. Agaram2016-05-291-3/+1
| | | | | When I floor the down-arrow too much, don't scroll unnecessarily off the bottom of the screen. But *do* scroll if there's errors to show.
* 2983 - migrate buttons over to sandbox/Kartik K. Agaram2016-05-191-0/+1
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* 2864 - replace all address:shared with just addressKartik K. Agaram2016-04-241-11/+11
| | | | | | | Now that we no longer have non-shared addresses, we can just always track refcounts for all addresses. Phew!
* 2773 - switch to 'int'Kartik K. Agaram2016-03-131-19/+19
| | | | This should eradicate the issue of 2771.
* 2771 - fix for clang on 32-bit machinesKartik K. Agaram2016-03-131-2/+2
| | | | | | | | | | | Turns out that LLVM/Clang still doesn't support multiplying 64-bit numbers on a 32-bit platform. https://llvm.org/bugs/show_bug.cgi?id=14469 This is just a quick fix, because it turns out I don't have any integer multiplication anywhere else. In the long run I think I'm going to just drop 'long long int' in favor of 'int'. Overflow is less likely than this configuration on somebody's machine.
* 2735 - define recipes using 'def'Kartik K. Agaram2016-03-081-1/+1
| | | | | | | | | | | | I'm dropping all mention of 'recipe' terminology from the Readme. That way I hope to avoid further bike-shedding discussions while I very slowly decide on the right terminology with my students. I could be smarter in my error messages and use 'recipe' when code uses it and 'function' otherwise. But what about other words like ingredient? It would all add complexity that I'm not yet sure is worthwhile. But I do want separate experiences for veteran programmers reading about Mu on github and for people learning programming using Mu.
* 2712Kartik K. Agaram2016-02-261-5/+5
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* 2709Kartik K. Agaram2016-02-251-1/+0
| | | | | Only Hide_errors when strictly necessary. In other places let test failures directly show the unexpected error.
* 2707Kartik K. Agaram2016-02-251-2/+0
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* 2581 - make space for the refcount in address:sharedKartik K. Agaram2016-01-201-5/+5
| | | | | | | | | | | We don't yet actually maintain the refcount. That's next. Hardest part of this was debugging the assume-console scenarios in layer 85. That took some detailed manual diffing of traces (because the output of diff was no good). New tracing added in this commit add 8% to .traces LoC. Commented out trace() calls (used during debugging) make that 45%.
* 2576 - distinguish allocated addresses from othersKartik K. Agaram2016-01-191-11/+11
| | | | | | | | | | | | | | | | This is the one major refinement on the C programming model I'm planning to introduce in mu. Instead of Rust's menagerie of pointer types and static checking, I want to introduce just one new type, and use it to perform ref-counting at runtime. So far all we're doing is updating new's interface. The actual ref-counting implementation is next. One implication: I might sometimes need duplicate implementations for a recipe with allocated vs vanilla addresses of the same type. So far it seems I can get away with just always passing in allocated addresses; the situations when you want to pass an unallocated address to a recipe should be few and far between.
* 2548 - teach 'print' to print integersKartik K. Agaram2015-12-281-7/+14
| | | | | | | | | | Still can't print non-integer numbers, so this is a bit hacky. The big consequence is that you can't print literal characters anymore because of our rules about how we pick which variant to statically dispatch to. You have to save to a character variable first. Maybe I can add an annotation to literals..
* 2627Kartik K. Agaram2015-12-151-3/+3
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* 2626Kartik K. Agaram2015-12-151-0/+2
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* 2468 - overload print-character as just 'print'Kartik K. Agaram2015-11-211-7/+7
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