'this' 未声明（在此函数中首次使用）

Question

我是 C 的新手，使用 Mingw32 编译器。 现在我正在创建从 IL 到 C (Native) 的反编译器

生成的代码（没有 System.Object）：

反编译TestApplication_Program.c

#include "DecompileTestApplication_Program.h"
DecompileTestApplication_Program* DecompileTestApplication_Program__ctor( ) {
    if (array__DecompileTestApplication_Program == 0) {
        array__DecompileTestApplication_Program=(void**)malloc(sizeof(void*)*(capacity__DecompileTestApplication_Program=4));
    }
    DecompileTestApplication_Program* this;
    //error: 'this' undeclared (first use in this function)
    if (count__DecompileTestApplication_Program==0) {
        this=(DecompileTestApplication_Program*)malloc(sizeof(DecompileTestApplication_Program));
        goto RealConstructor;
    }
    this=(DecompileTestApplication_Program*)array__DecompileTestApplication_Program[--count__DecompileTestApplication_Program];
    RealConstructor:
    this->ind = 0;
    this->a = 1;
    this->b = 3;
    //this._inherit_object_( ); //this is OOP tests ,still working on it
    return this;
}
void DecompileTestApplication_Program_Main( ) {
    int var_0_02;
    var_0_02 = 0;
    var_0_02 = ( var_0_02 + 1 );
    int var_1_08;
    var_1_08 = 1;
    int var_2_0A;
    var_2_0A = 3;
    var_1_08 = ( var_1_08 + var_2_0A );
    var_0_02 = ( var_0_02 + ( var_1_08 + var_2_0A ) );
    DecompileTestApplication_Program_blat = ( DecompileTestApplication_Program_blat + ++DecompileTestApplication_Program_bpa );
}
void DecompileTestApplication_Program__cctor( ) {
    DecompileTestApplication_Program_blat = 1;
    DecompileTestApplication_Program_bpa = 4;
}

反编译TestApplication_Program.h

#ifndef DecompileTestApplication_Program
#define DecompileTestApplication_Program
/*
Type's Name: DecompileTestApplication.Program
Time to Parse: 40.0023ms
*/
#include <stdio.h>
typedef struct {
    //Variables
    int ind;
    int a;
    int b;
} DecompileTestApplication_Program;
static int DecompileTestApplication_Program_blat;
static int DecompileTestApplication_Program_bpa;
//Methods
void DecompileTestApplication_Program_Main( );
DecompileTestApplication_Program* DecompileTestApplication_Program__ctor( );
void DecompileTestApplication_Program__cctor( );
static int count__DecompileTestApplication_Program=0;
static int capacity__DecompileTestApplication_Program=0;
static DecompileTestApplication_Program** array__DecompileTestApplication_Program=0;
#endif

@main.h

void main();

@main.cpp

//bookmart for includes
#include "DecompileTestApplication_Program.h"


void main() {
    //bookmark for initialize
    DecompileTestApplication_Program__cctor();
    DecompileTestApplication_Program_Main();
}

在第一个文件中发现的错误。 我搜索了这个错误的解决方法一段时间， 但没有找到。

Answer 1

#define DecompileTestApplication_Program

这意味着无论你在哪里看到DecompileTestApplication_Program 这个词，它都会被删除。因此，您尝试声明this：

DecompileTestApplication_Program* this;

扩展到

* this;

它试图取消引用未声明的变量this。要解决此问题，请更改宏名称。