Google對外發布C++編碼規范
Google的C++編碼規范對外發布，引起了業內開發人員的廣泛關注。
其中，來自硅谷的柯化成認為，這是地球上最好的一份C++編程規范，沒有之一，建議廣大國內外IT人員研究使用。
盛大的資深開發者趙劼表示，“非常同意。Google在這方面下足了功夫，讓所有人寫出來的代碼都使用同樣的規范，就好像在工程師編程世界里普及普通話一樣。很多資深工程師剛加入的時候被迫學習編碼規范，開始不習慣，后來發現收益非淺。所謂磨刀不誤砍柴功，創業公司更應該關注�！�
科泰的陳榕也認為，“希望Google索性再出版一個工具，類似早先C語言的lint，按照該規范自動排版。否則誰記得住這么多條條框框？”
C++開發者杜昶旭給大家的建議是，“建議所有開發人員反復閱讀此編碼規范，直到可以背下來再開始寫代碼。當然，更好的做法是根據這個再補充出更具體的執行策略。學校里這些知識老師強調的太少，提前自學吧�！�
當然，也有不同的聲音，來自大連的sagasw就認為，“關于Google的C++編碼規范，不知為何突然又火起來，這個規范在C++社區中應用的不多，關注度遠不如Gtest，另外這個規范對于Google是有幫助的，但不是最好的，也不是一定適合每個公司的，每個決定后面都有一個tradeoff，不知這些光會用規范，那意義不大�！�
“土豆”也表示，“Google的C++編碼規范沒有說的這么好吧，至少我看Webkit的源碼中，明顯蘋果的代碼比Google的代碼漂亮些，也容易看些，受不了Google源碼中的N多下劃線�！�
Example
They say an example is worth a thousand words so let's start off with an example that should give you a feel for the style, spacing, naming, etc.
An example header file, demonstrating the correct commenting and spacing for an @interface declaration
// GTMFoo.h
// FooProject
//
// Created by Greg Miller on 6/13/08.
// Copyright 2008 Google, Inc. All rights reserved.
//
#import
// A sample class demonstrating good Objective-C style. All interfaces,
// categories, and protocols (read: all top-level declarations in a header)
// MUST be commented. Comments must also be adjacent to the object they're
// documenting.
//
// (no blank line between this comment and the interface)
@interface GTMFoo : NSObject {
@private
NSString *foo_;
NSString *bar_;
}
// Returns an autoreleased instance of GMFoo. See -initWithString: for details
// about the argument.
+ (id)fooWithString:(NSString *)string;
// Designated initializer. |string| will be copied and assigned to |foo_|.
- (id)initWithString:(NSString *)string;
// Gets and sets the string for |foo_|.
- (NSString *)foo;
- (void)setFoo:(NSString *)newFoo;
// Does some work on |blah| and returns YES if the work was completed
// successfuly, and NO otherwise.
- (BOOL)doWorkWithString:(NSString *)blah;
@end
An example source file, demonstating the correct commenting and spacing for the @implementation of an interface. It also includes the reference implementations for important methods like getters and setters, init, and dealloc.
//
// GTMFoo.m
// FooProject
//
// Created by Greg Miller on 6/13/08.
// Copyright 2008 Google, Inc. All rights reserved.
//
#import "GTMFoo.h"
@implementation GTMFoo
+ (id)fooWithString:(NSString *)string {
return [[[self alloc] initWithString:string] autorelease];
}
// Must always override super's designated initializer.
- (id)init {
return [self initWithString:nil];
}
- (id)initWithString:(NSString *)string {
if ((self = [super init])) {
foo_ = [string copy];
bar_ = [[NSString alloc] initWithFormat:@"hi %d", 3];
}
return self;
}
- (void)dealloc {
[foo_ release];
[bar_ release];
[super dealloc];
}
- (NSString *)foo {
return foo_;
}
- (void)setFoo:(NSString *)newFoo {
[foo_ autorelease];
foo_ = [newFoo copy];
}
- (BOOL)doWorkWithString:(NSString *)blah {
// ...
return NO;
}
@end
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