青菜肉丝的专栏

wxpython.BoxSizer笔记

青菜肉丝 — Wed, 19 May 2010 22:42:00 +0800

Sizer是wxWidget的一个重要的布局规划工具。
其中的Add函数中的proportion参数是一个很重要的参数。
proportion=0时，Add的item的大小不会被Sizer调整,即使flag中有wx.EXPAND。
Sizer的Item中，除了Add时proportion=0的item，其余的item的分配的原则为：
item占比例=item在Add时proportion的值/所有item的proportion的值的和

boost.spirit用户手册翻译（35）：重构分析器

青菜肉丝 — Tue, 05 Feb 2008 10:51:00 +0800

Refactoring Parsers 重构分析器 There are three types of Refactoring Parsers implemented right now, which help to abstract common parser refactoring tasks. Parser refactoring means, that a concrete parser construct is replaced (refactored) by another very similar parser construct. Two of the Refactoring Parsers described here (refactor_unary_parser and refactor_action_parser) are introduced to allow a simple and more expressive notation while using Confix Parsers and List Parsers

boost.spirit用户手册翻译（36）：正则表达式分析器

青菜肉丝 — Tue, 05 Feb 2008 10:51:00 +0800

Regular Expression Parser 正则表达式分析器 Regular expressions are a form of pattern-matching that are often used in text processing. Many users will be familiar with the usage of regular expressions. Initially there were the Unix utilities grep, sed and awk, and the programming language perl, each of which make extensive use of regular expressions. Today the usage of such regular expressions is integrated in many more available systems. 正则表达式是经常在字符处理中使用模式匹配的一种形式。很多用户对正则表达式都很熟悉。最初是U

boost.spirit用户手册翻译（37）：范围锁

青菜肉丝 — Tue, 05 Feb 2008 10:51:00 +0800

Scoped Lock 范围锁 scoped_lock_d The scoped_lock_d directive constructs a parser that locks a mutex during the attempt to match the contained parser. scoped_lock_d定向器产生一个在尝试匹配所包含的分析器时锁定一个临界区的分析器。 Syntax: 语法： scoped_lock_d(mutex&)[body-parser] Note, that nesting scoped_lock_d directives bears the risk of deadlocks since the order of locking depends on the grammar used and may even depend on the input being parsed. Locking order has to be consistent within an applicatio

boost.spirit用户手册翻译（34）：仿函数分析器

青菜肉丝 — Fri, 01 Feb 2008 10:35:00 +0800

Functor Parser 仿函数分析器 The simplest way to write your hand coded parser that works well with the rest of the Spirit library is to simply write a functor parser. 使得你所写的代码能和Spirit其他部分合作愉快的最简单的方法就是简单地写一个仿函数分析器 A functor parser is expected to have the interface: 一个仿函数分析器应该有如下接口： struct functor { typedef T result_t; template std::ptrdiff_t operator()(ScannerT const& scan, result_t& result) const; };

boost.spirit用户手册翻译（33）：列表分析器

青菜肉丝 — Fri, 01 Feb 2008 10:23:00 +0800

List Parsers 列表分析器 List Parsers are generated by the special predefined parser generator object list_p, which generates parsers recognizing list structures of the type 列表分析器生成自特殊的预定义分析器生成器对象list_p，所生成的分析器识别如下类型的列表 item >> *(delimiter >> item) >> !end where item is an expression, delimiter is a delimiter and end is an optional closing expression. As you can see, the list_p generated parser does not recognize empty lists, i.e. the parser must find at l

boost.spirit用户手册翻译（32）：片段分析器

青菜肉丝 — Fri, 25 Jan 2008 16:45:00 +0800

Confix Parsers 片段分析器 Confix Parsers 片段分析器 Confix Parsers recognize a sequence out of three independent elements: an opening, an expression and a closing. A simple example is a C comment: 片段分析器识别一个包含三个元素的序列：一个开头，一个表达式和一个结尾。简单的例子就是C的注释： /* This is a C comment */ which could be parsed through the following rule definition: 它可以用下面定义的规则来分析： rule<> c_comment_rule = confix_p("/*", *anychar_p, "*/") ; The confix_p parser generator should be used

boost.spirit用户手册翻译（31）：字符集

青菜肉丝 — Tue, 22 Jan 2008 23:07:00 +0800

Character Sets 字符集 The character set chset matches a set of characters over a finite range bounded by the limits of its template parameter CharT. This class is an optimization of a parser that acts on a set of single characters. The template class is parameterized by the character type CharT and can work efficiently with 8, 16 and 32 and even 64 bit characters. 字符集分析器chset匹配由它的模板参数CharT所限制的范围内的有限字符子集。这个分析器针对单个字符的集合的分析而优化。这个模板类由字符类CharT参数化并且可以使用8、16和32甚至64位的字符。 template

boost.sprit用户手册翻译（30）：循环

青菜肉丝 — Fri, 18 Jan 2008 15:43:00 +0800

Loops 循环 So far we have introduced a couple of EBNF operators that deal with looping. We have the + positive operator, which matches the preceding symbol one (1) or more times, as well as the Kleene star * which matches the preceding symbol zero (0) or more times. 到目前为止我们已经介绍了一些针对循环的EBNF操作符。我们有+加号，匹配（1）到任意多次，我们也有克林星*，匹配零到任意多次。 Taking this further, we may want to have a generalized loop operator. To some this may seem to be a case of overkill. Yet there are grammars that are

boost.spirit用户手册翻译（29）：转义字符分析器

青菜肉丝 — Thu, 17 Jan 2008 09:02:00 +0800

Escape Character Parser 转义字符分析器 The Escape Character Parser is a utility parser, which parses escaped character sequences used in C/C++, LEX or Perl regular expressions. Combined with the confix_p utility parser, it is useful for parsing C/C++ strings containing double quotes and other escaped characters: 转义字符分析器属于工具分析器，用于分析C/C++、LEX或Perl正则表达式中的转移字符串。将之与confix_p工具分析器共同使用，在分析C/C++中由引号引起的字符串方面很有用。 confix_p('"', *c_escape_ch_p, '"') There are two different types of the Es