针对C目标运行时的简单ANTLR 3.4示例

Question

有谁知道（或有）简单ANTLR 3.4示例main()函数用于C目标吗？我试着用C或C++开始使用ANTLR，并且我看到的所有例子（包括this）都是过时的，例如，他们使用不再存在的功能。似乎下载的软件包本身并没有任何示例，Wiki上的示例已过时。

Answer 1

未经测试。

#include "YourLexer.h" 
#include "YourParser.h" 

int main() 
{ 

uint8_t * bufferData;  // Some memory with text in it 
uint32_t bufferSize;  // Size of said memory 
pANTLR3_UINT8 bufferName; // Name of buffer. ANTLR uses this for some default 
          // error messages 

//Creates an input stream. If you want to parse once from multiple sources 
// you can switch among these during lexing 
pANTLR3_INPUT_STREAM input = antlr3StringStreamNew(
    bufferData, 
    ANTLR3_ENC_8BIT, 
    bufferSize, 
    bufferName); 
assert(input != NULL); 

//Creates the lexer. Doesn't do anything until the parser(or you) tells it to. 
pYourLexer lxr = YourLexerNew(input); 
assert(lxr != NULL); 

//Creates an empty token stream. 
pANTLR3_COMMON_TOKEN_STREAM tstream = antlr3CommonTokenStreamSourceNew(
    ANTLR3_SIZE_HINT, TOKENSOURCE(lxr)); 
assert(tstream != NULL); 

//Creates a parser. 
pYourParser psr = YourParserNew(tstream); 
assert(psr != NULL); 

//Run the parser rule. This also runs the lexer to create the token stream. 
psr->some_parser_rule(psr); 

}