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Declarative issues caused by the parsing mechanism of the C + + compiler

Suppose we want to declare a variable of the vector type of STL, and read the information in the file:Std::ifstream in ("Data.txt");std::vectorAfter we reference the elements of data, we find that the compiler has an error. Why, let's analyze:At this point in the compiler, we are actually declaring a function, its return value is a vector, the parameter has two, the first parameter is a Istream_iterator obj

Deep Exploration of the C + + object Model-----compiler ' when ' auto-compositing nontrivial default constructor

are present.If there is member class object for default constructor, then these member default will also be called after all base class constructor are called.Two other situations:3.class declaration (inheritance) a virtual functionThe 4.class derives from a chain of inherited strings, which has one or more virtual base class.Summarize:In these four cases, the compiler must synthesize a default constructor for the class that does not declare construc

How the C + + compiler implements exception handling

Translator Note: This article has several translations on the internet, but not complete, so I decided to translate it myself. Although strive to believe, ya, Tatsu, but in view of this is my first translation experience, deficiencies please understand and point out. One of the revolutionary innovations of C + +, compared with traditional languages, is that it supports exception handling. Traditional error handling often does not meet the requirement

Explore c # tail recursive Compiler optimization,

Explore c # tail recursive Compiler optimization, Reading directory:Recursive Application A function calls itself directly or indirectly. This function can be called a recursive function. The main function of recursion is to convert the problem into a small-scale subproblem and gradually approach the final result with the solution of the subproblem. The most important thing about recursion is the boundar

A study of polymorphic principles--Understanding the implementation principle of polymorphism from the C + + compiler perspective

Theoretical knowledge:When a virtual function is declared in a class, the compiler generates a virtual function table in the class.A virtual function table is a data structure that stores a pointer to a class member function.Virtual function tables are automatically generated and maintained by the compiler.The virtual member function is placed into the virtual function table by the compiler.When a virtual function exists, each object has a pointer to

C ++ compiler Performance Comparison

Currently on the market, mainstream C/C ++ compilers include CL, gcc of M $, icl of Intel, pgcc of PGI, and bcc of Codegear (originally belonging to Borland ). Cl is the most widely used in Windows, while gcc is the first choice for C/C ++ compilers on a broader platform. However, when it comes to capability optimizati

Nodejs installation Error node. JS Configure Error:no acceptable C compiler found! resolved

node. js Configure Error:no acceptable C compiler found! Please do sure you has a C compiler installed on your system and/or consider adjusting the CC environment variable If you installed it in a non-standard prefix.Check two points:1, whether you have C

Extract vs file Compiler of class GCC and compile C program for DLL dynamic link library

Accustomed to Linux under the GCC compiler tools, like the command line to compile the link C program, incredibly also found that I installed the VS tool did not see directly compile the C program tools (I am not familiar with this). The compile file command for VS is cl, and the link command is link. Referring to the data on the Internet, the

C ++ compiler compilation problems

Many people do not know much about the C ++ compiler, so this article will introduce the C ++ compiler in detail. The so-called C ++ compiler is a compilation environment highly compatible with standardized

c++--to observe the various expressions and compiler use optimization techniques __c++

following four directions: (1) Perform speed optimization (2) Memory storage space Optimization (3) disk storage space Optimization (4) Compile time optimization. And we generally take the implementation of speed optimization mainly. Compiler working process: preprocessing-> lexical analysis-> parsing-> Semantic Analysis-> intermediate code generation-> target code generation. Among them, optimization generally exists in the last two stages. In parti

Default functions generated by the C ++ Compiler

Default functions generated by the C ++ Compiler Topic introduction: How does one assign and copy objects? What are their differences? Can an empty custom type perform these operations? Object Value assignment:"Operator overload User A (10), B; B =; Object replication: Call the copy constructor. User B; User A (B ); Or User A = B; // equivalent to user A (B );It also calls the copy constructor. Differences

When does the C ++ compiler provide the default constructor for users?

The first type is that the class member has a member as a class object and the member's class contains the default constructor. Then, the C ++ compiler will help you generate a default constructor for this class, it is used to call the constructor of its member object to complete the initialization structure of the member. It should be emphasized that if the member's class does not provide the default const

Linux/C + + compiler Gcc/egcs detailed

A. Run Gcc/egcsThe most important software development tool in Linux is GCC. GCC is the GNU C and C + + compiler. In fact, GCC can compile three languages: C, C + +, and OBJECTC (an object-oriented extension of the C language). Us

C Compiler anatomy _6.3.4 assembly code Generation _ generate assembly code for function call and return

6.3.4 Generating assembly code for function calls and returns In this section, let's discuss how to generate assembly code for function calls and function returns. The corresponding intermediate directives for the function call are as follows: Intermediate instruction of the four-dollar: Let's familiarize ourselves with the calling convention of the C function callingconvention, we need to put the parameters from right to left into the stack (that i

C + + ABI name change, compiler generation symbol study (QT for example)

In C + +, due to the existence of overloading and other technologies, the compiler to the function, struct, class, and so on to the linker, it can not be as simple as the C language through the function name, it needs to provide additional parameter information, but also with the C language to share the linker, which r

After intel8 C ++ compiler is integrated in vc6, the link is replaced with the xilink.

After installing intel 8 C ++ compiler, vc6.0 is easy to use and then integrated with assist x 10. CodeThe function of searching is no inferior to sourcesight 3.5. The function of automatically completing code and formatting text can also be comparable to that of slickedit 9. Integration of Intel 8 C ++ compiler in

Visual Stdio C + + compiler, linker common command line

The previous use of Visual Stdio is in an IDE environment. These two days of compiling GSL feel particularly inconvenient with the IDE environment, so it took a little time to learn how to use the Visual Stdio C + + compiler and connector at the command line.I am personally familiar with GCC, so the various usages here have made the GCC analogy, which is also easy to remember.Compiler CLThe

Effective C + + learning NOTE Clause 06: If you do not want to use the compiler automatically generated functions, you should explicitly deny

First, in order to dismiss the function provided automatically by the compiler, the corresponding member function can be declared private and not implemented . (the compiler will help you if you just don't implement it yourself)Such as: class a{ public : A ( const string name): M_name (name) {} private : // rejects copy and assignment, declares private, and declares only that it does not implement

VS2015 C + + compiler bug Case __c++

Add: Sorry, the non-VC compiler bug, is my own error. The return value of ToString () is a temporary string, and the const char* Sztext = const_cast By the way, we remind you to use the C_str method of string carefully.Reference articles:1. Carefully use the C_STR () value of the temporary string object 2. The destructor of a temporary object in C + +------Incidentally remind you to use String C_str Method

C # compiler optimizations that little thing

In C # programming, to end-user programs that need to use Release configuration, and the Release configuration and debug configuration, there is a key difference is that release compiler optimizations are enabled by default.The optimized code switch, the optimize switch, is combined with the debug switch in several combinations.| Compiler Switch Settings |

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