error-prone | Catch common Java mistakes as compile-time errors | Code Analyzer library

 by   google Java Version: v2.19.1 License: Apache-2.0

kandi X-RAY | error-prone Summary

kandi X-RAY | error-prone Summary

error-prone is a Java library typically used in Code Quality, Code Analyzer applications. error-prone has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

Error Prone is a static analysis tool for Java that catches common programming mistakes at compile-time.

            kandi-support Support

              error-prone has a medium active ecosystem.
              It has 6478 star(s) with 730 fork(s). There are 168 watchers for this library.
              There were 4 major release(s) in the last 12 months.
              There are 330 open issues and 1194 have been closed. On average issues are closed in 316 days. There are 54 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of error-prone is v2.19.1

            kandi-Quality Quality

              error-prone has no bugs reported.

            kandi-Security Security

              error-prone has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              error-prone is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              error-prone releases are available to install and integrate.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed error-prone and discovered the below as its top functions. This is intended to give you an instant insight into error-prone implemented functionality, and help decide if they suit your requirements.
            • Build ImmutableMap .
            • Registers the node type matcher .
            • Pretty print the given context .
            • Finds all variables in a given visitor state .
            • Compiles an expression tree into a matcher .
            • Gets the edit distance between two characters .
            • Fixes the catch blocks .
            • Builds fixes for unused variable fixes .
            • Parses the given command line arguments .
            • Apply the overrides to the scanner .
            Get all kandi verified functions for this library.

            error-prone Key Features

            No Key Features are available at this moment for error-prone.

            error-prone Examples and Code Snippets

            Recursively reduce all of the values in the given value .
            pythondot img1Lines of Code : 111dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def all_reduce(self, reduce_op, value, options=None):
                """All-reduces `value` across all replicas.
                >>> strategy = tf.distribute.MirroredStrategy(["GPU:0", "GPU:1"])
                >>> def step_fn():
                ...   ctx = tf.distribute.get_re  

            Community Discussions


            Typescript overrule generic [key: string]
            Asked 2021-Jun-02 at 17:01

            I have a FormMeta type that I use throughout my application:



            Answered 2021-Jun-02 at 17:01

            I think I got something which does what you are looking for by implementing a createFormMeta function which takes the fields separately to the rest of the metadata.

            This avoids you having to write the field types manually like you did in FormMeta<"filter" | "name" | "sortBy">.

            It's not clear to me whether this solution is acceptable for your particular use-case though.



            Is there any way to have TypeScript infer the type of a function's return value based on the call arguments?
            Asked 2021-May-30 at 01:13

            I'm setting up a function that will retrieve data from my database. It takes a key string as argument, and it returns a different data type based on the key.

            My goal is to have TypeScript infer the type that will be returned based on the key that's passed as argument.

            This is what I've tried:



            Answered 2021-May-30 at 01:13

            There is actually several ways, here is one way



            How to add a small bit of context in a grammar?
            Asked 2021-May-29 at 00:22

            I am tasked to parse (and transform) a code of a computer language, that has a slight quirk in its rules, at least I see it this way. To be exact, the compiler treats new lines (as well as semicolons) as statement separators, but other than that (e.g. inside the statement) it treats them as spacers (whitespace).

            As an example, this code:



            Answered 2021-May-29 at 00:22

            The relevant quote from the "specification" is this:

            A squirrel program is a simple sequence of statements.:

            stats := stat [';'|'\n'] stats

            [...] Statements can be separated with a new line or ‘;’ (or with the keywords case or default if inside a switch/case statement), both symbols are not required if the statement is followed by ‘}’.

            These are relatively complex rules and in their totality not context free if newlines can also be ignored everywhere else. Note however that in my understanding the text implies that ; or \n are required when no of the other cases apply. That would make your example illegal. That probably means that the BNF as written is correct, e.g. both ; and \n are optionally everywhere. In that case you can (for lark) just put an %ignore "\n" statement and it should work fine.

            Also, lark should not complain if you both ignore the \n and use it in a rule: Where useful it will match it in a rule, otherwise it will just ignore it. Note however that this breaks if you use a Terminal that includes the \n (e.g. WS or /\s/). Just have \n as an extra case.

            (For the future: You will probably get faster response for lark questions if you ask over on gitter or at least put a link to SO there.)



            React Next.js - Three related questions about SSR patterns
            Asked 2021-May-26 at 13:07

            the following question about the usage of next.js and react to achieve SSR build on top of each other, so I thought I'd write that into a single post. My main question is the third one, but I feel I need to first understand the first two questions in order to get there. So here we go:

            1. Am I right that the whole page is always reexecuted from scratch after the client has received it?

            Consider this next.js page component:



            Answered 2021-May-26 at 13:07

            Am I right that the whole page is always reexecuted from scratch after the client has received it?

            Yes and no. The initial html is built on the server and sent to the client as html, and then react is hydrated so that your page becomes interactive. As an example, consider this "page":



            What is the logic behind "compute()" in Dask dataframes?
            Asked 2021-May-23 at 14:22

            I'm struggling to understand when and when not to use compute() in Dask dataframes. I usually write my code by adding/removing compute() until the code works, but that's extremely error-prone. How should I use compute() in Dask? Does it differ in Dast Distributed?



            Answered 2021-May-23 at 14:22

            The core idea of delayed computations is to delay the actual calculation until the final target is known. This allows:

            • increased speed of coding (e.g. as a data scientist, I don't need to wait for every transformation step to complete before designing the workflow),
            • distribution of work across multiple workers,
            • overcoming resource constraints of my client, e.g. if I am using a laptop with limited memory, I can run heavy computations on dask workers that are in the cloud or another machine with more resources,
            • better efficiency if the final target requires only some tasks to be done (e.g. if the final calculation requires only a subset of the dataframe, then dask will load only the relevant columns/partitions).

            Some of the alternatives to calling .compute are:

            • .visualize(): this helps visualize the task graph. The DAG can become hairy when there are lots of tasks, so this is useful to run on smaller subsets of the data (e.g. only loading two/three partitions of the dataframe)
            • using client.submit: this launches computations right away providing you with a future, an object that refers to results of a task being computed. This gives the advantages of scaling work across multiple workers, but it can be a bit more resource intensive (since dask doesn't know the full workflow, it might run computations that are not needed to achieve the final target).

            With regards to distributed, I don't think there is a difference except for where the result will be: dask.compute will put the result in local machine, while client.compute will keep the result on a remote worker.



            How to make PHP getter/setter inherit DocBlock from their field?
            Asked 2021-May-22 at 19:12

            How can I make getter/setter methods to automatically use DocBlock description from their respective fields? Or maybe there are any other ways to solve this: see DocBlocks on getters/setters without manually copy-pasting every single one.

            Consider this example:

            There is some comment on field $name (1), however, it will almost never be seen as the field is private and intended to be used with getter/setter methods. However, on those methods IDE does not show any comments from field variables (2).

            You can, of course, simply copy-paste same description to both methods. But it becomes very difficult to manage when object has a dozen or more properties, all with getters/setters and extensively commented. It requires a lot of manual work to fix the same text in 3 places on every change and is very error-prone.

            IDE is PhpStorm.
            I'd prefer to do it without magic __get __set methods.



            Answered 2021-May-22 at 19:12

            The only option I know is using @see or @link. We can use them inline as well. This is how it looks in Phpstorm:

            The link in the description is clickable. Without a mouse, we can use a tab key to move a cursor on the link (3 x tab and enter).

            Final view:



            Ansible Inventory: how to build a group from hosts not in certain other groups
            Asked 2021-May-22 at 17:07

            I am looking for a way to build an inventory group that includes all those hosts that haven't been put into another group.

            In my case, the groups identify when a particular server should be updated - either on Mondays, Wednesdays, Fridays, or "any day, it doesn't matter". I do not want to explicitly enumerate the hosts, as that is manual work and error-prone.



            Answered 2021-May-21 at 23:39

            Create a group with all hosts, e.g. updateAll



            How to fully cover conditionals while testing code (eg. PHP and xdebug)
            Asked 2021-May-20 at 09:15

            Some time ago I have started writing tests in PHPUnit (v. 9). It's great and amazing but:

            How I can properly cover conditionals?

            I will give some examples where result is correct and expected, and where I see problems. Here it is:

            Please note that code below is only the sample.

            I know that when I pass true to if statement there will be no chance to go to other branch of code. It's only the example as plain as possible.

            Situation where problem does not exits:



            Answered 2021-May-20 at 09:15

            The default view in PHP Unit is indeed line coverage, and hence, as you indicate can't distinguish both branches in the single line ternary case.

            However, more recently PHPUnit also has branch and path coverage.

            It shows this in the output left of "Lines". In order to see which branches are missing, you can hover over a line in the source view that is yellow, and it will tell you that (in my example) only 3 out of 4 possible paths have been followed.

            The author of this feature also wrote an extensive explanation on his blog.



            When exactly are function arguments being destructed?
            Asked 2021-May-13 at 14:48

            I have a question because it is not clear to me when function arguments get destroyed. Therefore, is the concatenation of the following doSomething function error-prone or not?

            I’m asking because "it is the programmer's responsibility to ensure that std::string_view does not outlive the pointed-to character array". Can that be guaranteed in that specific case or not?



            Answered 2021-May-13 at 14:48

            The anonymous temporary passed to the (const reference) parameter const std::string_view& str_view survives the function call.

            Since there are nested functions, the anonymous temporaries are not destroyed until, conceptually, the closing semicolon of



            Rich edit control sends EN_CHANGE when spellcheck underline appears
            Asked 2021-May-10 at 15:13

            Let's say you've just set some text in a spellcheck-enabled rich edit control, and the text has some spelling errors. A split second will go by, spellcheck will kick in, and then the misspelled text will get underlined. But guess what: the rich edit control will actually send an EN_CHANGE notification just for the underlining event (this is assuming you've registered for notifications by doing SendMessage(hwnd, EM_SETEVENTMASK, 0, (LPARAM)ENM_CHANGE)).

            Is there a workaround to not get this type of behavior? I've got a dialog with some spellcheck-enabled rich edit controls. And I also want to know when an edit event has taken place, so I know when to enable the "Save" button. Getting an EN_CHANGE notification merely for the spellcheck underlining event is thus a problem.

            One option I've considered is disabling EN_CHANGE notifications entirely, and then triggering them on my own in a subclassed rich edit control. For example, when there's a WM_CHAR, it would send the EN_CHANGE notification explicitly, etc. But that seems like a problem, because there are many types of events that should trigger changes, like deletes, copy/pastes, etc., and I'd probably not capture all of them correctly.

            Another option I've considered is enabling and disabling EN_CHANGE notifications dynamically. For example, enabling them only when there's focus, and disabling when focus is killed. But that also seems problematic, because a rich edit might already have focus when its text is set. Then the spellcheck underline would occur, and the undesirable EN_CHANGE notification would be sent.

            I suppose a timer could be used, too, but I think that would be highly error-prone.

            Does anybody have any other ideas?

            Here's a reproducible example. Simply run it, and it'll say something changed:



            Answered 2021-May-10 at 15:13

            Use EM_CANUNDO (maybe also EM_CANREDO) to verify that contents has changed. I hope that spellchecker does't add any undo information.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install error-prone

            Our documentation is at Error Prone works with Bazel, Maven, Ant, and Gradle. See our installation instructions for details.


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