Compile-time Error Checking
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Compile Time Error Example
Events Archives ESP / ESD Magazine Newsletters Videos Collections About Us About Embedded compile time error in c Contact Us Newsletters Advertising Editorial Contributions Site Map Home> Insights >> Programming Pointers Catching errors early with compile-time assertions Dan compile time error and runtime error in c# Saks June 17, 2005 Tweet Save to My Library Follow Comments Dan_Saks-June 17, 2005 For some time now, I've been discussing how to use structures in C and C++ to define the layout
Compile Time Error And Runtime Error In Java
of memory-mapped device registers. In my last column ("Sizing and Aligning Device Registers," May 2005, p.9), I presented techniques you can use to give each structure member the proper size and alignment for its corresponding device register. Unfortunately, different platforms align and pad data differently, so a particular structure definition that lays out the members properly for one platform may produce an incorrect layout when compiled for
Compile Time Error Vs Runtime Error In Java
a different platform. All too often, an improperly laid-out structure compiles without complaint, but then the resulting program misbehaves at run time. Rather than struggle to debug the program, you can craft your code so that the compiler can catch the layout errors. The trick is to use assertions that produce overt compile-time errors whenever the structure members have the wrong size or alignment. C and C++ provide various ways to implement assertions. My preference is for something that provides a compile-time equivalent of the Standard C assert macro. Let's begin with brief look at that macro. Run-time assertions The assert macro is defined in the Standard C header
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Compile Time Error Mooshak
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack run time errors in java Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What is the difference between run-time error and compiler error? [duplicate] http://www.embedded.com/electronics-blogs/programming-pointers/4025549/Catching-errors-early-with-compile-time-assertions up vote 14 down vote favorite 7 This question already has an answer here: Runtime vs Compile time 19 answers In one of my prof slides on ploymorphism, I see this piece of code with a couple of comments: discountVariable = //will produce (DiscountSale)saleVariable;//run-time error discountVariable = saleVariable //will produce //compiler error As you can see, it says in the first casting statement that it'll produce run-time error and http://stackoverflow.com/questions/9471837/what-is-the-difference-between-run-time-error-and-compiler-error in the other one it says it'll produce compiler error. What makes these errors? and how they differ from each other? java compiler-errors share|improve this question edited Nov 16 '12 at 21:10 The Unfun Cat 4,25374065 asked Feb 27 '12 at 20:31 AbdullahR 1982414 marked as duplicate by assyliasjava Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed. Jan 26 at 17:52 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 15 Come on guys. The guy is trying to learn, downvotes are unnecessary. –JohnFx Feb 27 '12 at 20:35 3 Doesn't matter if it has addressed my example or not, what really matters is that I got the answer clearly. That guy explained it in a simple way that can be easy to understand to a naive programmer like me. –AbdullahR Feb 27 '12 at 20:54 Did you read the stackoverflow.com/faq ? –user647772 Feb 27 '12 at 21:00 Thank you AbdullahR, I hoped that from my example you could comprehend the difference and extrude the information you needed for your homework without me
runtime and compile time?UpdateCancelAnswer Wiki6 Answers Nitin Abhishek, hobbyist, RC aircraft modellerWritten 103w agoAlmost all computer programs written are in high level languages, which is a little closer to English than a sequence of 0's and 1's https://www.quora.com/What-is-the-difference-between-runtime-and-compile-time that is the machine language, so us humans have an easier time understanding and http://www.xyzws.com/javafaq/what-is-the-difference-between-compile-time-error-and-run-time-error/32 working with the code. To convert this program code into an executable file that can be read and executed by a machine, we use a Compiler.Now when you just use the terms runtime and compile time, the first thing that comes to mind are the compile time errors and runtime errors: Compile time errors: When we time error feed a bunch of text to the compiler to convert it to machine code.What can go wrong at compile time: Syntax errorsTypechecking errors(Rarely) compiler crashesIf the compiler succeeds, what do we know? The program was well formed---a meaningful program in whatever language.It's possible to start running the program as it's in a machine readable form. (The program might fail immediately, but at least we can try.)What are the inputs and compile time error outputs? Input was the program being compiled, plus any header files, interfaces, libraries, or other voodoo that it needed to import in order to get compiled.Output is hopefully assembly code or relocatable object code or even an executable program. Or if something goes wrong, output is a bunch of error messages.Runtime errors: What can go wrong are run-time errors:Division by zeroDeferencing a null pointerRunning out of memoryAlso there can be errors that are detected by the program itself:Trying to open a file that isn't thereTrying find a web page and discovering that an alleged URL is not well formedIf run-time succeeds, the program finishes (or keeps going) without crashing.Another scenario where the two terms can be used is in reference to when exactly is the source code compiled or converted to machine code: once just after the code is written i.e. compiled programs, or every time just before the program needs to run, i.e. interpreted programs, or compiled at runtime: In a compiled program (examples are C/C++ and Fortran):The source code is fed into another program (usually a compiler), which produces an executable program (or an error).The executable is run (by double clicking it, or typing it's name on the command line)Things that happen in the first step a
error? At compile time, when the code does not comply with the Java syntactic and semantics rules as described in Java Language Specification (JLS), compile-time errors will occurs. The goal of the compiler is to ensure the code is compliant with these rules. Any rule-violations detected at this stage are reported as compilation errors. The best way to get to know those rules is to go through all the sections in the JLS containing the key words "compile-time error". In general, these rules include syntax checking: declarations, expressions, lexical parsing, file-naming conventions etc; exception handling: for checked exceptions; accessibility, type-compatibility, name resolution: checking to see all named entities - variables, classes, method calls etc. are reachable through at least one of the declared path; etc. The following are some common compile time errors: a class tries to extend more than one class overloading or overriding is not implemented correctly attempt to refer to a variable that is not in the scope of the current block an inner class has the same name as one of one of its enclosing classes a class contains one or more abstract methods and the class itself is not declared "abstract" a class tries to reference a private member of another class trying to create an instance of an abstract class trying to change the value of an already initialized constant (final member) declare two (class or instance) members with the same name Here is a list of conditions that may cause compile-time errors. When the code compiles without any error, there is still chance that the code will fail at run time. The errors only occurs at run time are call run time errors. Run time errors are those that passed compiler's checking, but fails when the code gets executed. There are a lot of causes may result in runtime errors, such as incompatible type-casting, referencing an invalid index in an array, using an null-object, resource problems like unavailable file-handles, out of memory situations, thread dead-locks, infinite loops(not detected!), etc. The following are some common runtime errors: trying to invoke a method on an uninitialized variable (NullPointerException) ran out memory (memo