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  • Learning to write a compiler

    - by Anton
    Preferred Languages : C/C++, Java, and Ruby I am looking for some helpful books/tutorials on how to write your own compiler simply for educational purposes. I am most familiar with C/C++, Java, and Ruby so I prefer resources that involve one of those three, but any good resource is acceptable.

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  • How to manually throw a compiler error in GCC and Xcode

    - by coneybeare
    In xcode, while compiling apps with gcc, I want to throw compilation time errors if things like NSZombieEnabled is on for a distribution release, thus ensuring that compilation will fail and I won't accidentally do something stupid. I did some googling, but could not figure out how to cause the compiler to bail if a certain condition is met. Surely it must be easy, am I just not finding it?

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  • C precision of double: compiler dependent?

    - by yCalleecharan
    Hi,on my 32-bit machine (with an Intel T7700 duo core), I have 15 precision digits for both double and long double types for the C language. I compared the parameters LDBL_DIG for long doubles and DBL_DIG for doubles and they are both 15. I got these answers using MVS2008. I was wondering if these results can be compiler dependent or do they just depend on my processor? Thanks a lot...

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  • Unique_ptr compiler errors

    - by Godric Seer
    I am designing and entity-component system for a project, and C++ memory management is giving me a few issues. I just want to make sure my design is legitimate. So to start I have an Entity class which stores a vector of Components: class Entity { private: std::vector<std::unique_ptr<Component> > components; public: Entity() { }; void AddComponent(Component* component) { this -> components.push_back(std::unique_ptr<Component>(component)); } ~Entity(); }; Which if I am not mistaken means that when the destructor is called (even the default, compiler created one), the destructor for the Entity, will call ~components, which will call ~std::unique_ptr for each element in the vector, and lead to the destruction of each Component, which is what I want. The component class has virtual methods, but the important part is its constructor: Component::Component(Entity parent) { parent.addComponent(this) // I am not sure if this would work like I expect // Other things here } As long as passing this to the method works, this also does what I want. My confusion is in the factory. What I want to do is something along the lines of: std::shared_ptr<Entity> createEntity() { std::shared_ptr<Entity> entityPtr(new Entity()); new Component(*parent); // Initialize more, and other types of Components return entityPtr; } Now, I believe that this setup will leave the ownership of the Component in the hands of its Parent Entity, which is what I want. First a small question, do I need to pass the entity into the Component constructor by reference or pointer or something? If I understand C++, it would pass by value, which means it gets copied, and the copied entity would die at the end of the constructor. The second, and main question is that code based on this sample will not compile. The complete error is too large to print here, however I think I know somewhat of what is going on. The compiler's error says I can't delete an incomplete type. My Component class has a purely virtual destructor with an implementation: inline Component::~Component() { }; at the end of the header. However since the whole point is that Component is actually an interface. I know from here that a complete type is required for unique_ptr destruction. The question is, how do I work around this? For reference I am using gcc 4.4.6.

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  • Compiler Construction course

    - by donpal
    I'm looking for a course (preferably video, much preferably) like MIT's video courses on Compiler Construction. Can someone point me to some decent resources or help material (preferably video)?

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  • Is ToString() optimized by compiler?

    - by TheVillageIdiot
    Suppose I've following Code: Console.WriteLine("Value1: " + SomeEnum.Value1.ToString() + "\r\nValue2: " + SomeOtherEnum.Value2.ToString()); Will Compiler Optimize this to: Console.WriteLine("Value1: " + SomeEnum.Value1 + "\r\nValue2: " + SomeOtherEnum.Value2); I've checked it with IL Disassembler and there are calls to IL_005a: callvirt instance string [mscorlib]System.Object::ToString() I don't know if JIT optimizes this.

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  • C compiler for iPhone?

    - by thyrgle
    If you want to see why I am asking this look at my other question: http://stackoverflow.com/questions/2894615/how-to-display-console-text-in-uitextview So basically, I need to know if there is an iPhone C compiler that can be installed on the iPhone... Then I need to know what parameter I would put in the system("compile Foo") function. Thanks for the help in advanced.

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  • CSharp Compiler and Windows.Forms

    - by j-t-s
    Hi All I've just created a little app that programmatically compiles code using the C# Compiler, and it works brilliantly. But, one thing that I need it to do is compile Windows.Forms code. Like, I can create a console app with it, but I can't create a GUI-based form. Here's the link that got me started: http://support.microsoft.com/kb/304655 Can somebody please help? Thank you :)

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  • How does compiler understand the pointer type?

    - by Narek
    How c++ compiler understands the pointer type? As I know pointer has a size equal to WORD of the OS (32 or 64). So does it store dome info in that 32(or 64) bits about type? Just because you can not have a pointer on one type and assign to that pointer another pointer with a different type.

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  • #Define Compiler Directive in C#

    - by pm_2
    In C, I could declare a compiler directive as follows: #define MY_NUMBER 10 However, in C#, I only appear to be able to do this: #define MY_NUMBER Which is obviously useless in this case. Is this correct, or am I doing something wrong? If not, can anyone suggest a way of doing this, either at namespace or solution level? I thought of maybe creating a static class, but that seems to be overkill for one value.

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  • Is comparing an OO compiler to a SQL compiler/optimizer valid?

    - by Brad
    I'm now doing a lot of SQL development at my new job where as before I was doing Object Oriented desktop app stuff. I keep running across very large scripts (thousands of lines) and wanting to refactor in some way. I am seeing that SQL is a different sort of beast and it's probably fine to have these big scripts for the most part but while explaining this to me people are also insisting that the whole idea of refactoring is bad. That stuff like the .NET compiler are actually burdened by refactored code and that a big wall of code is more efficient and better design than code designed for reuse, readability and scalability. The other argument is that OO compilers are almost dangerously inefficient and don't have efficient memory management or runs too many CPU instructions compared to older "simpler" compilers and compared to SQL. Are these valid complaints? Even if some compiler like a C compiler is modestly more "efficient" (whatever that means on this high of a level without seeing code) would you want to write applications in C over C# or Java? Is comparing an OO compiler to a SQL compiler/optimizer even valid?

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  • Alternatives for the Snippet Compiler

    - by Marko Apfel
    It seems that the Snippet Compiler is not maintained anymore. So I need an alternative – also for getting syntax highlighting for code in publications. Preferable with the possibility to conserve this highlighting by copying selections to clipboard. Snippet Compiler does not allows this for selections – only by exporting the whole file content to clipboard with HTML- or RTF-formatting (File > Export > HTML to clipboard respectively RTF to clipboard). Today I switched to LINQPad. This application offers constructing LINQ-statements as well as compiling arbitrary code snippets. But there are some other alternatives too: CS-Script - The C# Script Engine CS-Script is a CLR (Common Language Runtime) based scripting system which uses ECMA-compliant C# as a programming language. CS-Script currently targets Microsoft implementation of CLR (.NET 2.0/3.0/3.5. sharpsnippetcompiler C# Snippet Compiler is a tiny IDE to create, debug and run your C# programs CsharpRepl C# interactive shell that is part of Mono's C# compiler. An interactive shell is usually referred to as a read eval print loop or repl. The C# interactive shell is built on top of the Mono.CSharp library, a library that provides a C# compiler service that can be used to evaluate expressions and statements on the flight. What I miss is an alternative with syntax highlighting like in my Visual Studio: Instead of:

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  • Google I/O 2010 - Optimizing apps with the GWT Compiler

    Google I/O 2010 - Optimizing apps with the GWT Compiler Google I/O 2010 - Faster apps faster - Optimizing apps with the GWT Compiler GWT 201 Ray Cromwell The GWT compiler isn't just a Java to JavaScript transliterator. It performs many optimizations along the way. In this session, we'll show you not only the optimizations performed, but how you can get more out of the compiler itself. Learn how to speed up compiles, use -draftCompile, compile for only one locale/browser permutation, and more. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 7 0 ratings Time: 56:17 More in Science & Technology

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  • Google I/O 2010 - A JIT Compiler for Android's Dalvik VM

    Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Android 301 Ben Cheng, Bill Buzbee In this session we will outline the design of a JIT Compiler suitable for embedded Android devices. Topics will include an architectural overview, the rationale for design decisions and the special support for JIT verification, testing and tuning. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 3 0 ratings Time: 01:00:14 More in Science & Technology

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  • Could not resolve <fx:Script> to a component implementation.

    - by seref
    Hi, i created project with flexmojos maven archtype..i used flexmojos:flexbuilder and compile/run with FlashBuilder 4 everything is okay but when i try to compile project with flexmojos i got following error: [ERROR] Z:....\src\main\flex\Main.mxml:[6,-1] Could not resolve < fx:Script to a component implementation. [INFO] BUILD FAILURE my mxml: <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" creationComplete="application1_creationCompleteHandler(event)"> <fx:Script> <![CDATA[ import mx.controls.Alert; import mx.events.FlexEvent; protected function application1_creationCompleteHandler(event:FlexEvent):void { Alert.show("success!!!!") } ]]></fx:Script> </s:Application> pom.xml like: ...... <packaging>swf</packaging> ...... <properties> <flex-sdk.version>4.1.0.16076</flex-sdk.version> <flexmojos.version>3.8</flexmojos.version> </properties> ...... <build> <sourceDirectory>src/main/flex</sourceDirectory> <testSourceDirectory>src/test/flex</testSourceDirectory> <plugins> <plugin> <groupId>org.sonatype.flexmojos</groupId> <artifactId>flexmojos-maven-plugin</artifactId> <version>${flexmojos.version}</version> <extensions>true</extensions> <dependencies> <dependency> <groupId>com.adobe.flex</groupId> <artifactId>compiler</artifactId> <version>${flex-sdk.version}</version> <type>pom</type> </dependency> </dependencies> <configuration> <compiledLocales> <locale>en_US</locale> </compiledLocales> <mergeResourceBundle>true</mergeResourceBundle> <accessible>true</accessible> <optimize>true</optimize> <targetPlayer>10.0.0</targetPlayer> <showWarnings>true</showWarnings> <linkReport>true</linkReport> </configuration> </plugin> </plugins> </build> <dependencies> <!-- Flex framework resource bundles --> <dependency> <groupId>com.adobe.flex.framework</groupId> <artifactId>flex-framework</artifactId> <version>${flex-sdk.version}</version> <type>pom</type> </dependency> <!-- Include unit test dependencies. --> <dependency> <groupId>com.adobe.flexunit</groupId> <artifactId>flexunit</artifactId> <version>4.0-rc-1</version> <type>swc</type> <scope>test</scope> </dependency> </dependencies> ....... maven output compiler config : INFO] Flex compiler configurations: -compiler.external-library-path C:\...\.m2\repository\com\adobe\flex \framework\playerglobal\4.1.0.16076\10.0\playerglobal.swc -compiler.include-libraries= -compiler.library-path C:\...\.m2\repository\com\adobe\flex\framework \datavisualization\4.1.0.16076\datavisualization-4.1.0.16076.swc C:\... \.m2\repository\com\adobe\flex\framework\flash-integration \4.1.0.16076\flash-integration-4.1.0.16076.swc C:\...\.m2\repository \com\adobe\flex\framework\flex\4.1.0.16076\flex-4.1.0.16076.swc C:\... \.m2\repository\com\adobe\flex\framework\framework \4.1.0.16076\framework-4.1.0.16076.swc C:\...\.m2\repository\com\adobe \flex\framework\osmf\4.1.0.16076\osmf-4.1.0.16076.swc C:\... \.m2\repository\com\adobe\flex\framework\rpc \4.1.0.16076\rpc-4.1.0.16076.swc C:\...\.m2\repository\com\adobe\flex \framework\spark\4.1.0.16076\spark-4.1.0.16076.swc C:\... \.m2\repository\com\adobe\flex\framework\sparkskins \4.1.0.16076\sparkskins-4.1.0.16076.swc C:\...\.m2\repository\com\adobe \flex\framework\textLayout\4.1.0.16076\textLayout-4.1.0.16076.swc C: \...\.m2\repository\com\adobe\flex\framework\utilities \4.1.0.16076\utilities-4.1.0.16076.swc C:\...\.m2\repository\com\adobe \flex\framework\datavisualization \4.1.0.16076\datavisualization-4.1.0.16076-en_US.rb.swc C:\... \.m2\repository\com\adobe\flex\framework\framework \4.1.0.16076\framework-4.1.0.16076-en_US.rb.swc C:\...\.m2\repository \com\adobe\flex\framework\osmf\4.1.0.16076\osmf-4.1.0.16076- en_US.rb.swc C:\...\.m2\repository\com\adobe\flex\framework\rpc \4.1.0.16076\rpc-4.1.0.16076-en_US.rb.swc C:\...\.m2\repository\com \adobe\flex\framework\spark\4.1.0.16076\spark-4.1.0.16076-en_US.rb.swc C:\...\.m2\repository\com\adobe\flex\framework\textLayout \4.1.0.16076\textLayout-4.1.0.16076-en_US.rb.swc C:\...\.m2\repository \com\adobe\flex\framework\flash-integration\4.1.0.16076\flash- integration-4.1.0.16076-en_US.rb.swc C:\...\.m2\repository\com\adobe \flex\framework\playerglobal\4.1.0.16076\playerglobal-4.1.0.16076- en_US.rb.swc -compiler.theme Z:\.....\target\classes\configs\themes\Spark \spark.css -compiler.accessible=true -compiler.allow-source-path-overlap=false -compiler.as3=true -compiler.debug=false -compiler.es=false -compiler.fonts.managers flash.fonts.JREFontManager flash.fonts.BatikFontManager flash.fonts.AFEFontManager flash.fonts.CFFFontManager -compiler.fonts.local-fonts-snapshot Z:\.....\target\classes \fonts.ser -compiler.keep-generated-actionscript=false -licenses.license flashbuilder4 952309948800588759250406 -licenses.license flexbuilder4.displayedStartPageAtLeastOneTime true -compiler.locale en_US -compiler.optimize=true -compiler.source-path Z:\.....\src\main\flex -compiler.strict=true -use-network=true -compiler.verbose-stacktraces=false -compiler.actionscript-file-encoding UTF-8 -target-player 10.0.0 -default-background-color 8821927 -default-frame-rate 24 -default-script-limits 1000 60 -default-size 500 375 -compiler.headless-server=false -compiler.keep-all-type-selectors=false -compiler.use-resource-bundle-metadata=true -metadata.date Fri Mar 04 14:04:37 EET 2011 -metadata.localized-title Main x-default -verify-digests=true -compiler.namespaces.namespace+=http://ns.adobe.com/mxml/2009,Z:\..... \target\classes\config-4.1.0.16076\mxml-2009-manifest.xml -compiler.namespaces.namespace+=library://ns.adobe.com/flex/spark,Z: \.....\target\classes\config-4.1.0.16076\spark-manifest.xml -compiler.namespaces.namespace+=library://ns.adobe.com/flex/mx,Z:\..... \target\classes\config-4.1.0.16076\mx-manifest.xml -compiler.namespaces.namespace+=http://www.adobe.com/2006/mxml,Z:\..... \PozitronUI\target\classes\config-4.1.0.16076\mxml-manifest.xml - static-link-runtime-shared-libraries=false -load-config= -metadata.language+=en_US any help... regards,

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  • Suppressing line specific XCode compiler warnings

    - by MrHen
    Similar to Ben Gottlieb's question, I have a handful of deprecated calls that are bugging me. Is there a way to suppress warnings by line? For instance: if([[UIApplication sharedApplication] respondsToSelector:@selector(setStatusBarHidden:withAnimation:)]) { [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide]; } else { [[UIApplication sharedApplication] setStatusBarHidden:YES animated:NO]; //causes deprecation warning } All I care about is that line. I don't want to turn off all deprecation warnings. I would also rather not do something like suppress specific warnings by file. There have been a few other circumstances where I wanted to flag a specific line as okay even though the compiler generates a warning. I essentially want to let my team know that the problem has been handled and stop getting bugged about the same line over and over.

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  • Java generics: What is the compiler's issue here?

    - by Epaga
    I have the following methods: public <T> T fromJson( Reader jsonData, Class<T> clazz ) { return fromJson( jsonData, (Type)clazz ); } public <T> T fromJson( Reader jsonData, Type clazz ) { ... } The compiler is saying about the first method: type parameters of <T>T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object return fromJson( jsonData, (Type)clazz ); ^ What is the problem?

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