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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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  • Help with a compiler warning: Initialization from distinct Objective-C type when types match

    - by Alex Gosselin
    Here is the function where I get the compiler warning, I can't seem to figure out what is causing it. Any help is appreciated. -(void)displaySelector{ //warning on the following line: InstanceSelectorViewController *controller = [[InstanceSelectorViewController alloc] initWithCreator:self]; [self.navController pushViewController:controller animated:YES]; [controller release]; } Interface and implementation for the initWithCreator: method -(InstanceSelectorViewController*)initWithCreator:(InstanceCreator*)creator; -(InstanceSelectorViewController*)initWithCreator:(InstanceCreator*)crt{ if (self = [self initWithNibName:@"InstanceSelectorViewController" bundle:nil]) { creator = crt; } return self; }

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  • Compiler optimization of repeated accessor calls

    - by apocalypse9
    I've found recently that for some types of financial calculations that the following pattern is much easier to follow and test especially in situations where we may need to get numbers from various stages of the computation. public class nonsensical_calculator { ... double _rate; int _term; int _days; double monthlyRate { get { return _rate / 12; }} public double days { get { return (1 - i); }} double ar { get { return (1+ days) /(monthlyRate * days) double bleh { get { return Math.Pow(ar - days, _term) public double raar { get { return bleh * ar/2 * ar / days; }} .... } Obviously this often results in multiple calls to the same accessor within a given formula. I was curious as to whether or not the compiler is smart enough to optimize away these repeated calls with no intervening change in state, or whether this style is causing a decent performance hit. Further reading suggestions are always appreciated

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  • A/UX cc compiler errors on trivial code: "declared argument argc is missing"

    - by Fzn
    On a quite ancient UNIX (Apple A/UX 3.0.1 for 680x0 processors) using the built-in c compiler (cc), this issue arrises. Here is the code I'm trying to compile: #include <stdlib.h> #include <stdio.h> int main() int argc; char **argv; { if (argc > 1) puts(argv[1]); return (EXIT_SUCCESS); } And here is the output I get: pigeonz.root # cc -c test.c "test.c", line 5: declared argument argc is missing "test.c", line 6: declared argument argv is missing Using a more modern prototype did not help, nor did the manual page, nor a quick google search. What am I doing wrong?

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  • Odd compiler error on if-clause without braces

    - by DisgruntledGoat
    The following Java code is throwing a compiler error: if ( checkGameTitle(currGame) ) ArrayList<String> items = parseColumns( tRows.get(rowOffset+1), currGame, time, method ); checkGameTitle is a public static function, returning a boolean. The errors are all of the type "cannot find symbol" with the symbols being variable ArrayList, variable String and variable items. However, if I add {curly braces} then the code compiles with no errors. Why might this be? Is there some ambiguity on the if clause without them?

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  • Java assert nasty side-effect - compiler bug?

    - by Alex
    This public class test { public static void main(String[] args) { Object o = null; assert o != null; if(o != null) System.out.println("o != null"); } } prints out "o != null"; both 1.5_22 and 1.6_18. Compiler bug? Commenting out the assert fixes it. The byte code appears to jump directly to the print statement when assertions are disabled: public static main(String[]) : void L0 LINENUMBER 5 L0 ACONST_NULL ASTORE 1 L1 LINENUMBER 6 L1 GETSTATIC test.$assertionsDisabled : boolean IFNE L2 ALOAD 1: o IFNONNULL L2 NEW AssertionError DUP INVOKESPECIAL AssertionError.<init>() : void ATHROW L2 LINENUMBER 8 L2 GETSTATIC System.out : PrintStream LDC "o != null" INVOKEVIRTUAL PrintStream.println(String) : void L3 LINENUMBER 9 L3 RETURN L4

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  • Delphi Compiler Directive to Evaluate Arguments in Reverse

    - by Peter Turner
    I was really impressed with this delphi two liner using the IFThen function from Math.pas. However, it evaluates the DB.ReturnFieldI first, which is unfortunate because I need to call DB.first to get the first record. DB.RunQuery('select awesomedata1 from awesometable where awesometableid = "great"'); result := IfThen(DB.First = 0, DB.ReturnFieldI('awesomedata1')); Obviously this isn't such a big deal, as I could make it work with five robust liners. But all I need for this to work is for Delphi to evaluate DB.first first and DB.ReturnFieldI second. I don't want to change math.pas and I don't think this warrants me making a overloaded ifthen because there's like 16 ifthen functions. Just let me know what the compiler directive is, if there is an even better way to do this, or if there is no way to do this and anyone whose procedure is to call db.first and blindly retrieve the first thing he finds is not a real programmer.

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  • default maven compiler setting

    - by Jeeyoung Kim
    Hello Maven gurus, Right now, I'm writing a small java application by my own, with few maven pom.xml files. I want to make all my maven packages to compile with jdk 1.6, and I can't find a good way to do it without manually setting it on every single POMs - I'm sick of copy-and-pasting <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> in every single pom.xml file I generate. Is there a simpler way to resolve this issue?

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  • Code crashing compiler...

    - by AndrejaKo
    Hi! I'm experimenting with a piece of C code. Can anyone tell me why is VC 9.0 with SP1 crashing for me? Oh, and the code is meant to be an example used in a discussion why something like void main (void) is evil. struct foo { int i; double d; } main (double argc, struct foo argv) { struct foo a; a.d=0; a.i=0; return a.i; } If I put return a; compiler doesn't crash.

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  • C# Compiler should give warning but doesn't?

    - by Cristi Diaconescu
    Someone on my team tried fixing a 'variable not used' warning in an empty catch clause. try { ... } catch (Exception ex) { } - gives a warning about ex not being used. So far, so good. The fix was something like this: try { ... } catch (Exception ex) { string s = ex.Message; } Seeing this, I thought "Just great, so now the compiler will complain about s not being used." But it doesn't! There are no warnings on that piece of code and I can't figure out why. Any ideas? PS. I know catch-all clauses that mute exceptions are a bad thing, but that's a different topic. I also know the initial warning is better removed by doing something like this, that's not the point either. try { ... } catch (Exception) { } or try { ... } catch { }

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  • How do I use compiler intrinsic __fmul_?

    - by Eric Thoma
    I am writing a massively parallel GPU application. I have been optimizing it by hand. I received a 20% performance increase with _fdividef(x, y), and according to The Cuda C Programming Guide (section C.2.1), using similar functions for multiplication and adding is also beneficial. The function is stated as this: "_fmulrn,rz,ru,rd". __fdividef(x,y) was not stated with the arguments in brackets. I was wondering, what are those brackets? If I run the simple code: int t = __fmul_(5,4); I a compiler error about how _fmul is undefined. I have the CUDA runtime included, so I don't think it is a setup thing; rather it is something to do with those square brackets. How do I correctly use this function? Thank you.

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  • Code crashing compiler: main() returning a struct instead of an int

    - by AndrejaKo
    Hi! I'm experimenting with a piece of C code. Can anyone tell me why is VC 9.0 with SP1 crashing for me? Oh, and the code is meant to be an example used in a discussion why something like void main (void) is evil. struct foo { int i; double d; } main (double argc, struct foo argv) { struct foo a; a.d=0; a.i=0; return a.i; } If I put return a; compiler doesn't crash.

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  • Possible compiler bug in MSVC12 (VS2013) with designated initializer

    - by diapir
    Using VS2013 Update 2, I've stumbled on some strange error message : // test.c int main(void) { struct foo { int i; float f; }; struct bar { unsigned u; struct foo foo; double d; }; struct foo some_foo = { .i = 1, .f = 2.0 }; struct bar some_bar = { .u = 3, // error C2440 : 'initializing' : cannot convert from 'foo' to 'int' .foo = some_foo, .d = 4.0 }; // Works fine some_bar.foo = some_foo; return 0; } Both GCC and Clang accept it. Am I missing something or does this piece of code exposes a compiler bug ? EDIT : Duplicate: Initializing struct within another struct using designated initializer causes compile error in Visual Studio 2013

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  • C++0x optimizing compiler quality

    - by aaa
    hello. I do some heavy numbercrunching and for me floating-point performance is very important. I like performance of Intel compiler very much and quite content with quality of assembly it produces. I am thinking at some point to try C++0x mainly for sugar parts, like auto, initializer list, etc, but also lambdas. at this point I use those features in regular C++ by the means of boost. How good of assembly code do compilers C++0x generate? specifically Intel and gcc compilers. Do they produce SSE code? is performance comparable to C++? are there any benchmarks? My Google search did not reveal much. Thank you.

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  • Compiler: Translation to assembly

    - by sub
    I've written an interpreter for my experimental language and know I want to move on and write a small compiler for it. It will probably take the source, go through the same steps as the interpreter (tokenizer, parser) and then translate the source to assembly. Now my questions: Can I expect that every command in my language can be 1:1 translated to a bunch of assembly instructions? What I mean is if I will have to completely throw over the whole input program or if it is just translated to assembly per line. Which assembler should I use as output format?

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  • C++ performance, optimizing compiler, empty function in .cpp

    - by Dodo
    I've a very basic class, name it Basic, used in nearly all other files in a bigger project. In some cases, there needs to be debug output, but in release mode, this should not be enabled and be a NOOP. Currently there is a define in the header, which switches a makro on or off, depending on the setting. So this is definetely a NOOP, when switched off. I'm wondering, if I have the following code, if a compiler (MSVS / gcc) is able to optimize out the function call, so that it is again a NOOP. (By doing that, the switch could be in the .cpp and switching will be much faster, compile/link time wise). --Header-- void printDebug(const Basic* p); class Basic { Basic() { simpleSetupCode; // this should be a NOOP in release, // but constructor could be inlined printDebug(this); } }; --Source-- // PRINT_DEBUG defined somewhere else or here #if PRINT_DEBUG void printDebug(const Basic* p) { // Lengthy debug print } #else void printDebug(const Basic* p) {} #endif

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  • C# logic order and compiler behavior

    - by Terrapin
    In C#, (and feel free to answer for other languages), what order does the runtime evaluate a logic statement? Example: DataTable myDt = new DataTable(); if (myDt != null && myDt.Rows.Count > 0) { //do some stuff with myDt } Which statement does the runtime evaluate first - myDt != null or: myDt.Rows.Count > 0 ? Is there a time when the compiler would ever evaluate the statement backwards? Perhaps when an "OR" operator is involved?

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  • Source-to-source compiler framework wanted

    - by cheungcc_2000
    Dear all, I used to use OpenC++ (http://opencxx.sourceforge.net/opencxx/html/overview.html) to perform code generation like: Source: class MyKeyword A { public: void myMethod(inarg double x, inarg const std::vector<int>& y, outarg double& z); }; Generated: class A { public: void myMethod(const string& x, double& y); // generated method below: void _myMehtod(const string& serializedInput, string& serializedOutput) { double x; std::vector<int> y; // deserialized x and y from serializedInput double z; myMethod(x, y, z); } }; This kind of code generation directly matches the use case in the tutorial of OpenC++ (http://www.csg.is.titech.ac.jp/~chiba/opencxx/tutorial.pdf) by writing a meta-level program for handling "MyKeyword", "inarg" and "outarg" and performing the code generation. However, OpenC++ is sort of out-of-date and inactive now, and my code generator can only work on g++ 3.2 and it triggers error on parsing header files of g++ of higher version. I have looked at VivaCore, but it does not provide the infra-structure for compiling meta-level program. I'm also looking at LLVM, but I cannot find documentation that tutor me on working out my source-to-source compilation usage. I'm also aware of the ROSE compiler framework, but I'm not sure whether it suits my usage, and whether its proprietary C++ front-end binary can be used in a commercial product, and whether a Windows version is available. Any comments and pointers to specific tutorial/paper/documentation are much appreciated.

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