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1 What is the purpose of using do {...} while (0) in macros? - Quora
The while (0) at the end ensures a single iteration and as Robert Love points out in his answer, it ensures that the behavior of the macro is always the same ...
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2 do {…} while (0) in macros | How Not To Code -
do{…}while(0) is the only construct in C that lets you define macros that always work the same way, so that a semicolon after your macro ...
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3 Difference between while(1) and while(0) in C language
It is opposite of while(1). It means condition will always be false and thus code in while will never get executed. while(0) { // loop does not ...
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4 Is do ... while(0) obsolete?
all of Company's C programmers are busy with other projects. Some of this code contains multi-line macro definitions that are wrapped in a do ... while(0), as ...
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5 Why is this code using a do{}while(0) in a macro? - Reddit
The do { ... } while(0) idiom works because the trailing semicolon is handled properly. In your example it's not strictly necessary as the ...
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6 Significance and use of do{...}while(0) |
Significance and use of do{...}while(0) ... This code snippet is not a loop, it seems there is no significance of using do...while this way, then ...
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7 Difference between while(1) and while(0) in C ... - Tutorialspoint
On other hand while(0) is the loop where the condition is always treated as false and so the code inside the block never gets to start executing ...
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8 Do while loop - Wikipedia
› wiki › Do_while_loop
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9 FAQ/DoWhile0 - Linux Kernel Newbies
(from Dave Miller) Empty statements give a warning from the compiler so this is why you see #define FOO do { } while(0). (from Dave Miller) It gives you a ...
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10 MCC generated code to manipulate I/O pins. Why the do while ...
The do{} while(0) is necessary for multiple statements inside the do{} to generate correct code in certain code block, but it is not necessary ...
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11 do-while - Manual - PHP
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12 PRE10-C. Wrap multistatement macros in a do-while loop
The text doesn't seem to warn that it's impossible to use do { ... } while (0) if the multi-line statement wrapped includes a break or continue statement which ...
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13 Swallowing the Semicolon (The C Preprocessor)
do {…} while (0);. which is one statement. The loop executes exactly once; most compilers generate no extra code for it.
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14 Break Statement & Do While Loop
› ~elab › ECE114 › Break Statem...
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15 do...while - JavaScript - MDN Web Docs - Mozilla
The do...while statement creates a loop that executes a specified statement until the test condition evaluates to false.
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16 do-while-zero construct & MISRA Rule 19.4 - NXP Community
Programmers with poor understanding of language syntax sometimes use do while(0) to get a brace-enclosed statement. I guss that's why MISRA mentioned it...
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17 while(0)' against 'statement' when writing C macro?
Well, you really don't need the "do" and "while (0)" bits for type 2 to prevent this though. A plain block will do just fine. · 1. It's syntax ...
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18 Difference between while(1) and while(0) in C language - Byju's
It is just the opposite of the while(1) loop. The while(0) loop means that the condition available to us will always be false. The execution of the code will, ...
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19 do-while loop -
A do-while statement causes the statement (also called the loop body) to be executed repeatedly until the expression (also called controlling ...
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20 Do While Loop: Definition, Example & Results -
The loop needs to have a counter starting at zero that increments every time the loop is executed. Inside the loop there also need to be a ...
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21 Chapter 5: The while loop
The true/false expression in the while statement can be anything that evaluates to true or false. Just like if statements, 0 is treated as false and any non ...
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22 Loops: while(), for() and do .. while() - Physics and Astronomy
To avoid accidental "infinite loops" that never stop the loop must do something to change the value of the controlling expression. We shall refer to this as the ...
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23 do-while Statement (C) - Microsoft Learn
In this do-while statement, the two statements y = f( x ); and x--; are executed, regardless of the initial value of x . Then x > 0 is ...
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24 What is do { } while(0) in macros and should we use it?
However, if your purpose is to write safe C code and only allow safe C code to compile, there is reason to question the purpose of do { } while(0) . Several ...
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25 C Programming Course Notes - Looping Constructs
do-while Loops · In theory the body can be either a single statement or a block of statements within { curly braces }, but in practice the curly braces are ...
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26 While Loop – Programming Fundamentals - Rebus Press
The variable counter is said to be controlling the loop. It is set to zero (called initialization) before entering the while loop structure and as long as it is ...
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27 V696. The 'continue' operator will terminate 'do { ... } while ...
The analyzer has detected code that may mislead the programmer. Not every programmer is aware that the continue operator in the do { ... } while(0) loop ...
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28 Python "while" Loops (Indefinite Iteration)
This continues until n becomes 0 . At that point, when the expression is tested, it is false, and the loop terminates. Execution would resume at the first ...
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29 Advanced preprocessor tips and tricks - IAR Systems
An ancient trick-ofthe- trade called the "do { ... } while(0)" trick is presented. The article ends with a discussion on whether #if or #ifdef is preferable ...
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30 Python while loop - w3resource
The while loop repeatedly tests the expression (condition) and, if it is true, executes the first block of program statements. The else clause ...
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31 while loop to repeat when condition is true - MATLAB while
limit = 0.8; s = 0; while 1 tmp = rand; if tmp > limit break end s = s + tmp; end ... The MATLAB while loop is similar to a do...while loop in other ...
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32 C while and do...while Loop - Programiz
So, if the first input is a non-zero number, that number is added to the sum variable and the loop continues to the next iteration. This process is repeated ...
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33 Better then #define ZFREE(p) do { free(p); p = NULL; } while(0)
do {} while(0) is a common idiom for macros in C, because it consumes the trailing semicolon, which a bare {} block doesn't do.
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34 Loops: while and for - The Modern JavaScript Tutorial
let i = 0; do { alert( i ); i++; } while (i < 3);. This form of syntax should only be used when you want the body of the loop to execute at ...
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35 Trivial Do While Loop - C2 wiki
Other ways of having multiple statements in a macro do not allow you to freely add or leave off a ; after invoking the macro. The do while(0) packages up the ...
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36 do{ }while(0)的好处? - 知乎
do{...}while(0)的妙用 --------------------------- 一个新手,初入知乎,一心求知, ...
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37 empty_statement macro (Linus Torvalds) - Yarchive
The reason we always write #define empty_statement do { } while (0) instead of #define empty_statement /* empty */ is not that if (x) empty_statement; ...
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38 C# while Loop - TutorialsTeacher
The for loop contains the initialization and increment/decrement parts. When using the while loop, initialization should be done before the loop starts, and ...
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39 do { } while (0); inspection – IDEs Support (IntelliJ Platform)
Hi, today I tried to use CLion for an old tool - normally I use IDEA for Java coding. I found an inspection for a do-while-loop that when...
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40 VBA While Loop - A Complete Guide - Excel Macro Mastery
When the condition is on the Do line, the loop may not run at all. So it will run zero or more times. When the condition is on the Loop line, the loop will ...
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41 C# While Loop - W3Schools
The do/while loop is a variant of the while loop. This loop will execute the code block once, before checking if the condition is true, then it will repeat the ...
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42 DO WHILE Statement - SAS Help Center
The expression is evaluated at the top of the loop before the statements in the DO loop are executed. If the expression is true, the DO loop ...
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43 Infinite Loop in C - Javatpoint
The above do..while loop represents the infinite condition as we provide the '1' value inside the loop condition. As we already know that non-zero integer ...
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44 Loops in C : Learn for, while, do while loops. - CodesDope
Let's go to our first example in while loop where we have to print 'Hello World' 10 times. We can also do the same with for loop. But before that, let's look at ...
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45 C/Macros
then BadSquare(3+4) would give 3+4*3+4, which evaluates to 19, which is probably not what we ... 1 #define HiHi() do { puts("hi"); puts("hi"); } while(0) 2.
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46 For, While and Do While Loops in C -
This program is a very simple example of a for loop. x is set to zero, while x is less than 10 it calls printf to display the value of the variable x, ...
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47 19.4 do while(0) - MISRA Discussion Forums
The sole purpose of do-while-zero is to save non-compliant code from the compiler errors it would otherwise receive! If the macro was written as ...
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48 C++ do…while loop with Examples - Guru99
The do-while loop should be used when the number of iterations is not fixed, and the loop must execute for at least once. The C++ compiler ...
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49 Please explain this code,,i dont understand while(n!=0) loop
Loop will work until 'n' is = 0. At end of every loop you divide 'n' by 10, so it will finally become 0. ... Where am I wrong? ... What is the mistake in this?
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50 C: do...while Statement - Arm Developer
cond_exp is an expression that is evaluated at the end of each pass through the loop. If the value of the expression is "false" (i.e., compares equal to zero) ...
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51 C Loops - While Loop, Do-While Loop, For Loop - Tutorial Kart
Initial value of variable i is 40First iteration:printf function will print i++ i.e. 40do – while condition is : (5,4,3.6.0,0)Here comma is behaving as operator ...
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52 do{..}while(0) macro substitutions - C / C++ - Bytes
do{..}while(0) macro substitutions. C / C++ Forums on Bytes.
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53 3.9. Macro Pitfalls - MIT
Macro definitions do not have to have balanced parentheses. ... That has the appearance of a C expression that would compute the size of the ... while (0); ...
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54 What is the different between while(0) and while(1) in c ...
So, a while(1){ } would mean the loop would iterate infinitely and a while(0){ } would mean that the body of the loop will never get executed.
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55 Python While Loop Statements (Indefinite Iteration) -
loop_value = 0 while (loop_value < 9): print ('The loop value is:', ... while loop that you would like to share with us, then you can do so ...
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56 AssertMacros.h - Apple Open Source
0 ) * fprintf(stderr, " error: %d\n", errorCode); * } * * If you do not define ... while ( 0 ) #else #define __Verify(assertion) \ do \ { \ if ...
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57 C - while loop in C programming with example - BeginnersBook
Infinite loop: var will always have value >=5 so the loop would never end. Example 2: #include int main() ...
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58 Do while loop - Wikiwand
› Do_while_loop
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59 do-while Loop - YouTube
Neso Academy
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60 while 0 - Everything with the topic | Alibaba Cloud
Linux Kernel and some other open-source code often encounter such code: do{ ...}while(0) Such code is not a loop at first glance. Do... while has no meaning at ...
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61 Things to commit just before leaving your job - gists · GitHub
#define memcpy(d,s,sz) do { for (int i=0;i→ Check Latest Keyword Rankings ←
62 Simple macros for testing C programs - Samuel A. Rebelsky
That's not bad. The semicolons on lines by themselves worry me slightly. Here's one strategy I was taught: do { } while (0) is a statement that ...
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63 Example of DO with WHILE, UNTIL - IBM
The WHILE and UNTIL options make successive executions of the do-group dependent upon a specified condition.
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64 cppcoreguidelines-avoid-do-while - clang-tidy
Warns when using do-while loops. They are less readable than plain while loops, since the termination condition is at the end and the condition is not ...
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65 Python While Loop Tutorial – While True Syntax Examples ...
They are used to repeat a sequence of statements an unknown number of times. This type of loop runs while a given condition is True and it only ...
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66 CPP / C++ - Preprocessor and Macros
1.4 Do while 0 macro idiom ... The do-while-0 macros defined as in the next code block are widely used in low level code such as Linux kernel, ...
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67 For, While, and Do...While Loops in JavaScript - KIRUPA
When our for loop is initially hit at the starting point, the i variable is created and initialized to 0. Next, we go to the condition part of the loop that ...
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68 A do/while loop inside a for loop - Codecademy
Does anyone have any idea why this is causing an infinite loop and crashing my browser? This is my code: for (var i = 5; i > 0; i–) { do { console.log(“T ...
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69 do while Loop in Typescript
The do-while statement executes the block of statements within its braces as long as its conditional expression is true. When you use a do-while ...
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70 do-while
The above loop would run one time exactly, since after the first iteration, when truth expression is checked, it evaluates to FALSE ( $i is not bigger than 0) ...
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71 comp.lang.c FAQ list · Question 10.4
#define MACRO(arg1, arg2) do { \ /* declarations */ \ stmt1; \ stmt2; \ /* ... */ \ } while(0) /* (no trailing ; ) */ When the caller appends a semicolon, ...
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72 The while and do-while Statements (The Java™ Tutorials ...
The while statement continually executes a block of statements while a particular ... The Java programming language also provides a do-while statement, ...
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73 [Solved] How do I fix my do-while-loop so that it doesnt infinite ...
I also tried while (x != 0) but that seems to not work because x just skips 0 and it becomes an infinite loop when x is assigned the value 0.
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74 The do while loop in C - C Programming Tutorial -
Inside the body of the loop the if condition (i%3==0) is tested, if it is true, then the statement inside the if block is executed. The statement i++ increments ...
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75 JavaScript do...while Loop with Practical Examples
1) Simple JavaScript do while statement example · First, declare and initialize the count variable to zero. · Second, show the count and increase its value by one ...
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76 Python Loops - For, While, Nested Loops With Examples
Our inner loop checks the condition (0 < 1) which is TRUE. So a star(*) is printed and j is incremented and the inner loop condition is checked ...
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77 Difference between while(1) and while(0) in C language
It is an infinite loop which will run till a break statement is issued explicitly. Interestingly not while(1) but any integer which is non-zero will give the ...
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78 Best practices for the C language preprocessor
The compiler will not generate a loop as the iteration condition is always false: while(0). Do not merely put braces without the beginning ...
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79 While loop - Learn Python 3 - Snakify
› lessons › while_loop
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80 Please explain what do you understand by while(0) and while ...
while(0) means that the looping conditions will always be false, i.e., the code inside the while loop will not be executed. On the opposite, while(1) is an ...
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81 C multi-line macro: do/while(0) and checking its return value
Anything that's done multiple times throughout your codebase and which takes multiple lines of code to do each time is a good candidate for ...
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82 C++中do...while(0)的妙用 - CSDN博客
while(condition),比如有这样的宏:#define Foo(x) do{\ printf("first ... 既然循环里面执行了一次,那这个看似多余的do...while(0)有什么意义呢?
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83 Enclosing Loop - Incremental Java
continue causes the control flow to jump to the loop condition (for while, do while loops) or to the update (for for loops). This causes control flow to jump to ...
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84 C++ for loops, while loops - CodingUnit Programming Tutorials
Lets look at the “for loop” from the example: We first start by setting the variable i to 0. This is where we start to count. Then we say that the for loop must ...
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85 7.7 — Introduction to loops and while statements - Learn C++
To do this, it is common to use a loop variable, often called a counter. ... count from 10 down to 0 while (count >= 0) { if (count == 0) ...
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86 Do While Loop - Error - Studio - UiPath Community Forum
I think I know why it is running multiple times for the first entry and not for the rest… See, first execution the variable Val starts from 0 as ...
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87 do{...}while(0)的用法- 掘金
总体来说, do{...}while(0) 有两种用法。 一.定义宏,实现局部作用域. 大家做c语言题目的时候 ...
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88 9.2. The while loop
... the command controlling the while loop executes successfully (exit status of zero). The syntax is: while CONTROL-COMMAND; do CONSEQUENT-COMMANDS; done.
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89 Do...While Loops in Swift -
The break statement breaks the loop. This means it completely terminates the execution of the code. You can use the break statement in a repeat…while loop the ...
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90 walkerlala - C macro : the " do { ... } while(0)" magic - 博客园
Translate this page
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91 The C Preprocessor
the output generated by the C preprocessor for `program.c' as input would be ... The `do' and `while (0)' are a kludge to make it possible to write `WARN_IF ...
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92 C++ Macros
#define INCI(i) do { int a=0; ++i; } while(0). INCI(k): do { int a=0; ++k; } while(0). INCI("cat"): do { int a=0; ++"cat"; } while(0).
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93 do {...} while(0) macros - Re
To: pari-dev list ; Subject: Re: do {...} while(0) macros; From: Bill Allombert  ...
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94 Do while in c - Linux Hint
This condition will be true if the value is incremented. So it will reach 1 from 0. But as there is no value incrementation inside the loop body. The value will ...
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95 Usages of Macro of C Programming Language such as Prefix ...
#define ASSERT(x) do { } while (0). #endif in the file arch→ Check Latest Keyword Rankings ←

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