assert

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a problem, I am allowing the used to upload certificate and private key files. Now suppose I have a file whose extension is messed-up (changed knowingly or unknowingly) say to break the system.. I need to put a validation in place that can check and can tell me that the given file is a valid certificate file or private key file or some other file.. What i was thing was : to check for -- BEGIN CERTIFICATE -- , -- BEGIN RSA PRIVATE KEY -- in the file content.. Please tell what I am thing is good, or there is some other better solution

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Regarding the classic test pattern of Arrange-Act-Assert , I frequently find myself adding a counter-assertion that precedes Act. This way I know that the passing assertion is really passing as the result of the action. I think of it as analogous to the red in red-green-refactor, where only if I've seen the red bar in the course of my testing do I know that the green bar means I've written code that makes a difference. If I write a passing test, then any code will satisfy it; similarly, with respect to Arrange-Assert-Act-Assert, if my first

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: So I've got a macro that works nicely in GCC, but not in Microsoft's C++ Compiler. I'm hoping somebody might know of a workaround, or perhaps can explain to me why it behaves this way. I'm sure this macro isn't exactly "standard", but it would really help me out. Here is a functional example of the macro: #define VA_NARGS_IMPL(_1, _2, _3, _4, _5, N, ...) N #define VA_NARGS(...) VA_NARGS_IMPL(__VA_ARGS__, 5, 4, 3, 2, 1) #define FULLY_EXPANDED(count, ...) \ MAC ## count (__VA_ARGS__) #define SEMI_EXPANDED(count, ...) FULLY_EXPANDED(count, __VA

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Since boost is forbidden in a company I work for I need to implement its functionality in pure C++. I've looked into boost sources but they seem to be too complex to understand, at least for me. I know there is something called static_assert() in the C++0x standart, but I'd like not to use any C++0x features. 回答1: One other trick (which can be used in C) is to try to build an array with a negative size if the assert fail: #define ASSERT(cond) int foo[(cond) ? 1 : -1] as a bonus, you may use a typedef instead of an object, so that it is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm searching for an elegant way to convert a normal Python dict with some nested dicts to an object. For example: >>> d = {'a': 1, 'b': {'c': 2}, 'd': ["hi", {'foo': "bar"}]} Should be accessible in this way: >>> x = dict2obj(d) >>> x.a 1 >>> x.b.c 2 >>> x.d[1].foo bar I think, this is not possible without recursion, but what would be a nice way to get an objectstyle for dicts? 回答1: Update: In Python 2.6 and onwards, consider whether the namedtuple data structure suits your needs: >>> from collections import namedtuple >>> MyStruct =

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'd like to implement an "assert" that prevents compilation, rather than failing at runtime, in the error case. I currently have one defined like this, which works great, but which increases the size of the binaries. #define MY_COMPILER_ASSERT(EXPRESSION) switch (0) {case 0: case (EXPRESSION):;} Sample code (which fails to compile). #define DEFINE_A 1 #define DEFINE_B 1 MY_COMPILER_ASSERT(DEFINE_A == DEFINE_B); How can I implement this so that it does not generate any code (in order to minimize the size of the binaries generated)? 回答1: A

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When using nose 1.2.1 with Python 3.3.0, I sometimes get an error message similar to the following one ====================================================================== FAIL: maxdiff2.test_equal ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/lib/python3.3/site-packages/nose/case.py", line 198, in runTest self.test(*self.arg) File "/Users/loic/cmrsj/Calculus_II/scrap/maxdiff2.py", line 32, in test_equal assert_equal(str1, str2) AssertionError: 'Lorem ipsum dolor

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How to static_assert a template type is EqualityComparable concept in C++11? 回答1: You could use the following type trait: #include template struct is_equality_comparable : std::false_type { }; template struct is_equality_comparable () == std::declval (), (void)0) >::type > : std::true_type { }; Which you would test this way: struct X { }; struct Y { }; bool operator == (X const&, X const&) { return true; } int main() { static_assert(is_equality_comparable ::value, "!"); // Does not fire static_assert(is_equality_comparable ::value, "!"); //

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Suppose I want to create a compile-time heterogenous container of unique types from some sequence of non-unique types. In order to do this I need to iterate over the source type (some kind of tuple ) and check whether each type already exists in my "unique" tuple. My question is: How can I check whether a tuple (or a boost::fusion container) contains a type? I'm open to using either the STL or boost . 回答1: #include #include template struct has_type; template struct has_type > : std::false_type {}; template struct has_type > : has_type > {};

上两篇主要是讲述断言的概念，基本语法，总结等等 这一篇主要是以PPT的形式展示各个场景下关于断言的应用。 为了在设计中加入断言的功能，因此需要写一个DUT。如下： `define true 1 `define free (a && b && c && d) module assertion( input clk, input rst_n ); reg a = 1'b0 ; reg b = 1'b0 ; reg c = 1'b0 ; reg d = 1'b0 ; reg e = 1'b0 ; reg f = 1'b0 ; reg start = 1'b0 ; reg stop = 1'b0 ; always @(posedge clk) begin a <= $urandom_range(0,1); b <= $urandom_range(0,1); c <= $urandom_range(0,1); d <= $urandom_range(0,1); e <= $urandom_range(0,1); f <= $urandom_range(0,1); start <= $urandom_range(0,1); stop <= $urandom_range(0,1); end assign state = {a,b,c,d}; assign bus = {a,b,c,d};