goto

I saw this nice blog post about a Scala continuations that 'emulates' a GOTO statement in the Scala language. (read more about Continuations here ) I would like to have the same in the programming language Groovy. I think it's possible within a Groovy compiler phase transformation . I'm working on an Domain-Specific Language (DSL), and preferred embedded in Groovy. I would like to have the GOTO statement, because the DSL is an unstructured language (and is generated from workflow diagrams). I need a 'labeled' goto statement, not to line numbers. The DSL is a language for workflow definitions,

How can I use a "goto" statement to break out of a loop for(i = 0; (i < 9); i++) { for(j = 0; j < 9; j++) { //cout << " " << Matrix[i][j]; //cout << "i: " << i << endl; if(Matrix[i][j] == 0) { //temp = 10; [goto] ; //break; } } } I wanted to keep the values at which i and j were when I left the nested for loop. How can I use a goto statement for that? Like this: int i,j; for(i = 0; i < 9; i++) { for(j = 0; j < 9; j++) { //cout << " " << Matrix[i][j]; //cout << "i: " << i << endl; if(Matrix[i][j] == 0) { //temp = 10; goto end; //break; } } } end: cout << i << " " << j << endl; Just as you use

I am reading C Programming - A Modern Approach by K.N.King to learn the C programming language and it was noted that goto statements must not skip variable-length array declarations. But now the question is: Why are goto jumps allowed to skip fixed-length array declarations and ordinary declarations? And more precisely, what is the behavior of examples like these, according to the C99 standard? When I tested these cases it seemed like the declarations were actually not jumped over, but is that correct? Are the variables whose declarations might have been jumped over safe to use? 1. goto later;

What are the performance benefits or penalties of using goto with a modern C++ compiler? I am writing a C++ code generator and use of goto will make it easier to write. No one will touch the resulting C++ files so don't get all "goto is bad" on me . As a benefit, they save the use of temporary variables. I was wondering, from a purely compiler optimization perspective, the result that goto has on the compiler's optimizer? Does it make code faster , slower , or generally no change in performance compared to using temporaries / flags. The part of a compiler that would be affected works with a

What is the best way to manage resources for a C program. Should I use a nested if structure or should I use goto statements? I am aware there is a lot of taboo about goto statements. However, I think it is justified for local resource clean up. I have supplied two samples. One compares a nested if structure and another uses goto statements. I personally find the goto statements make the code easier to read. For those who might argue that the nested if prompt better structure, imagine if the datatype was something other than a char*, like a Windows handle. I feel that the nested if structure

I have a bit unusual situation - I want to use goto statement to jump into the loop, not to jump out from it. There are strong reasons to do so - this code must be part of some function which makes some calculations after the first call, returns with request for new data and needs one more call to continue. Function pointers (obvious solution) can't be used because we need interoperability with code which does not support function pointers. I want to know whether code below is safe, i.e. it will be correctly compiled by all standard-compliant C/C++ compilers (we need both C and C++). function