A compiler is a computer program (or set of programs) that transforms source code written in a programming language (the source language) into another computer language (the target language, often having a binary form known as object code).
1
vote
1answer
77 views
Cross Compile Arm Program to Intel
I have searched around for a way to run a program meant for ARM processors on an Intel computer, but I can only find ways to do the reverse, to compile Intel programs for ARM. Are there any ...
9
votes
0answers
121 views
Disadvantages of functional intermediate form
I'm writing an optimizer for a language similar to JavaScript, and need to choose an intermediate code representation. The obvious/typical choice these days is Static Single Assignment (SSA).
...
3
votes
5answers
189 views
Is it a good idea to read compiler source code? [closed]
I'm a junior in college majoring in Computer Science. Apart from writing lots of code, I want to start reading source code written by others to improve my coding skills and learn better/different ways ...
2
votes
0answers
68 views
Homogeneous vs. heterogeneous AST representation
What are the reasons to choose a homogeneous vs. a heterogeneous AST representation for implementing a complex domain-specific programming language?
Just to be very clear about what I'm asking, here ...
0
votes
1answer
162 views
Why use why semicolons and curly braces? [closed]
I wonder why some languages like C/C++/Java/Php require the use of semicolons and curly braces, while others like BASIC or Python don't.
Do semicolons/braces make it easier and faster for the ...
0
votes
4answers
107 views
Use functions inside a loop declaration
What's the best practice?
This :
for ($i = 0; $i < count($array); $i++) {
//stuff
}
Or, what I usually do :
$count = count($array);
for($i = 0; $i < $count; $i++) {
//stuff
}
Is it the ...
11
votes
4answers
433 views
Is it possible to use the Intel C/C++ compiler on Linux to create object files to be linked on Windows?
Why?
Depending on your source the Intel compiler is likely or most definitely the compiler generating the fastest executables for the x86 architecture (5 to 100 % execution time improvement).
Intel ...
-2
votes
2answers
149 views
Why do people tend to gravitate to older versions of visual studio? [closed]
I'm starting to pick up all of the perks of C++11, and being a 2010 user i'm considering installing 2012 instead for better c++11 support. But why is it that 2012 doesn't seem as popular as 2010? Am i ...
-3
votes
1answer
32 views
Execution process of IOS application? [closed]
Hi am newbie to IOS dev my question is in java after compilation source file will be convertes to class files.Can anyone help me to understand execution process of IOS app i.e source files to .ipa ...
11
votes
3answers
861 views
Writing a Compiler Compiler - Insight on Use and Features
This is part of a series of questions which focuses on the sister project to the Abstraction Project, which aims to abstract the concepts used in language design in the form of a framework. The ...
-1
votes
2answers
143 views
How the cross programming language compiler or translator works [closed]
These days there are more cross programming language compilers (specially from some 'X' language to JavaScript). I wonder how these are developed? What are the general steps to be taken care to write ...
0
votes
0answers
38 views
how to compile the code remotly and show results to the user [duplicate]
It's just a how-to question, want to know the right path to explore, can anyone guide me how the sites like http://jsfiddle.net or http://ideone.com/ works, meaning by the user inputs the code in ...
3
votes
1answer
500 views
What is the Ken Thompson Hack? [duplicate]
I read some stuff like cm bell labs but i couldn't get it all. How does it work really? What is the logic in that?
28
votes
9answers
1k views
What is the difference between “Syntax” and “Syntactic Sugar”
Background
The Wikipedia page on Syntactic Sugar states:
In computer science, syntactic sugar is syntax within a programming language that is designed to make things easier to read or to express. ...
13
votes
2answers
3k views
What is ASM.js and what does it mean for everyone?
I'm starting to hear rumblings about this project called ASM.js. Currently their web site is terrible and confusing. Here's what I know from my research on the web.
It is a subset of JavaScript that ...
10
votes
2answers
533 views
Why can't a compiler avoid importing a header file twice by its own?
New to C++! So I was reading this: http://www.learncpp.com/cpp-tutorial/110-a-first-look-at-the-preprocessor/
Header guards
Because header files can include other header files, it is possible ...
3
votes
1answer
125 views
upgrading to newer version of compiler
I had legacy code that was originally build for some quite old version of compiler. We are talking about native code, not managed. Now it is ported to almost newest version of the compiler. Every ...
11
votes
3answers
369 views
How to implement lazy evaluation of if()
I am currently implementing an expression evaluator (single line expressions, like formulas) based on the following:
the entered expression is tokenized to separate literal booleans, integers, ...
7
votes
5answers
872 views
When to pay for C++ compilers
Recently I have began to wonder when developers should pay for compilers. Compilers come for free with most platforms or there is a free version easily obtainable.
Example:
OS X - GCC and Clang/LLVM ...
3
votes
2answers
185 views
Are there any practical uses of allowing recursive inclusion of a file?
I am currently implementing NASM-like preprocessor for my assembler, and I am wondering what is the correct way of handling recursively included files. From what I see, there are two ways to deal with ...
-4
votes
3answers
406 views
How is an IDE compiled?
I'd like to know the general procedure of how an IDE is built/compiled/created.
Additionally, what are some tools/scripts used to create an IDE?
I don't mean to say that compiling IDE needs an IDE. ...
3
votes
2answers
297 views
What happens when using address before it's allocated?
The very simple piece of C++ code below is incorrect, it's easy to see why and tools like Valgrind will tell you. In running several C++ codes containing this kind of error, I noticed that each time, ...
18
votes
4answers
738 views
Detecting misusage of delete[] vs. delete at compile time
I'd like to know if it's possible to detect the delete error commented below at compile time? Especially, I'd like to hear about g++ compiler.
ClassTypeA *abc_ptr = new ClassTypeA[100];
...
7
votes
1answer
115 views
What is the current state of SECD and SKI machine use and research?
I'm doing some independent research/study with a professor who's a very functional guy. The goal is to examine more of what's happening behind the scenes with functional languages than we normally ...
3
votes
1answer
318 views
Online compilers and repls - not one big security hole?
There are plenty of compilers and REPL services on the web. For example: Fay ide.
I find that implementing some similar technology would be very interesting. But it seems like a major security hole. ...
0
votes
1answer
434 views
Fastest native C++ multi-platform compiler & IDE & debugger [closed]
If I'll begin developing cross platform applications, The complied file speed is very important for me .
I have research before than and find same result about IDE :
(I ignored eclipse because very ...
2
votes
2answers
240 views
Convert grammar into an LL(1) grammar which recognises the same language
I have the following sample question for a compilers exam and wanted to check my solution.
Convert the following grammar into an LL(1) grammar which recognises the same
language:
E -> E + T
E ...
0
votes
0answers
226 views
Steps in converting a grammar to LL(1) Grammar
I have the following question:
Convert the following grammar into an LL(1) grammar which recognises the same
language (you may assume that the grammar is unambiguous).
A -> int
A -> int + A
A ...
5
votes
3answers
208 views
Constructing a Finite State Automaton
I have an exam question that I am unsure of the answer. The question is:
In organisation X valid user names have the following structure. The
user name can be either the employee’s name followed ...
4
votes
1answer
1k views
First and Follow Sets for a Grammar
I'm studying for a Compiler Construction module I'm doing and I have a sample question as follows:
Calculate the FIRST and FOLLOW sets for the following grammar..
S -> uBDz
B -> Bv
B -> w
D ...
3
votes
1answer
206 views
Showing a grammar is ambiguous
I have the following question taken from a compilers course exam:
Show that the following grammar is ambiguous.
S = XcY
X = a
Y = b | Z
Z = bW
W = d | ϵ
I drew the following tree:
Am I correct ...
3
votes
1answer
381 views
Constructing a Deterministic Finite State Automaton for a given Regex
I have a couple of exam questions for my compilers class and wanted to check if my solutions are correct.
The first question is:
Consider a language in which numbers start with an optional minus
...
1
vote
1answer
279 views
The Jitter (the just-in-time compiler) in ASP.NET [closed]
I know that C# gets compiled to an IL then after that to a machine code depending on the machine using just-in-time compiler. My question will go to ASP.NET. Is it the same?
Does it require 3 steps? ...
3
votes
1answer
184 views
What follows after lexical analysis?
I'm working on a toy compiler (for some simple language like PL/0) and I have my lexer up and running. At this point I should start working on building the parse tree, but before I start I was ...
5
votes
4answers
336 views
Is the output of Eclipse's incremental java compiler used in production? Or is it simply to support Eclipse's features?
I'm new to Java and Eclipse. One of my most recent discoveries was how Eclipse comes shipped with its own java compiler (ejc) for doing incremental builds. Eclipse seems to by default output ...
19
votes
5answers
885 views
Is Google Closure a true compiler?
This question is inspired by the debate in the comments on this Stack Overflow question. The Google Closure Compiler documentation states the following (emphasis added):
The Closure Compiler is a ...
-3
votes
1answer
106 views
Compiler Dependencies [closed]
I'm a newbie researcher who's passion is programming languages (Web era). I'm wondering why all the Web frameworks and Web-based general purposes languages, have a huge number of dependencies when you ...
0
votes
5answers
234 views
Is comparing an OO compiler to a SQL compiler/optimizer valid?
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 ...
4
votes
3answers
345 views
Prerequisites to compiler theory? [closed]
It's not meant to be subjective or get advice on what would be the best path to take, but an objective list of things that must be known in order for me to pick up a book on compiler theory and ...
2
votes
2answers
458 views
How is it possible to write the compiler of a programming language with that language itself [duplicate]
Possible Duplicate:
How could the first C++ compiler be written in C++?
You probably heard that Microsoft released a new language called TypeScript which is a the typed superset of ...
0
votes
0answers
49 views
Built-in Context-and-Input-to-Output-Hashing in Compilers
Why doesn't (open source) compilers contain builtin funtionality for (shared) caching and reuse-fetching (using SHA1-hash of compiler-version, build-flags, target-platform and inputs) of executable ...
-3
votes
5answers
220 views
How do I make a .sh file that counts each time you compile? [closed]
I wanted to compile my program and I wanted to know how many times I have compiled it.
How do I make a .sh file to do that? (I'm using mac, is it .sh file?)
2
votes
5answers
4k views
How to write a very basic compiler [duplicate]
Possible Duplicate:
Best Online resources to learn about Compilers?
What would be the best way to learn about compilers, and executable formats?
Advanced compilers like gcc compile codes ...
0
votes
2answers
127 views
Calculations in Vector Register
How do vector registers work in terms of calculations and alloting data to them ?
Is there a detailed reference available somewhere explaining how vector registers work and how data is fetched from ...
2
votes
5answers
1k views
How are operators organized in memory
How are operators organized/saved in the memory in context of a programming language. Are they procedures/functions saved somewhere and compilers just manipulate things to call these procs whenever ...
4
votes
4answers
504 views
Could implicit static methods cause problems?
This is a purely hypothetical question.
Say I create a class method that contains no references to instance variables or other resources. For example (C#):
protected string FormatColumn(string ...
10
votes
3answers
4k views
Why would more CPU cores on virtual machine slow compile times?
[edit#2] If anyone from VMWare can hit me up with a copy of VMWare Fusion, I'd be more than happy to do the same as a VirtualBox vs VMWare comparison. Somehow I suspect the VMWare hypervisor will be ...
1
vote
3answers
250 views
Dynamic choice of compilers?
An application has the following logic:
client => created *.cpp => sent to the server => cl.exe + *.cpp =
*.exe
client => created *.cs => sent to the server => csc.exe + *.cs =
*.exe
client => ...
2
votes
1answer
399 views
High-level language to assembly
If assembly language is only a readable way to represent machine code, then why are HLLs converted to assembly first and then to machine code?
Shouldn't HLLs be directly converted to machine code?
5
votes
3answers
293 views
Compiler Linking: How to handle circular references?
I'm currently writing a compiler for a new language and I'm struggling with the linking aspect of new Types when there exists a circular reference.
I've created a dependency tree so that I can ...
