本文整理汇总了C++中Evaluator::exec方法的典型用法代码示例。如果您正苦于以下问题：C++ Evaluator::exec方法的具体用法？C++ Evaluator::exec怎么用？C++ Evaluator::exec使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Evaluator的用法示例。
在下文中一共展示了Evaluator::exec方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: lex
int
main(int argc, char* argv[])
{
init_colors();
// Prepare the symbol table.
Symbol_table syms;
init_symbols(syms);
Module_decl mod;
// Prepare the input buffer.
File src = argv[1];
Input_buffer in = src;
try {
// Create the token stream over. This will be populated
// by the lexer.
Token_stream ts;
// Build and run the lexer.
Lexer lex(syms, in);
if (!lex.lex(ts))
return -1;
// Build and run the parser. The location map
// is used to save source locations, which are
// used to diagnose elaboration errors.
Location_map locs;
Parser parse(syms, ts, locs);
if (!parse.module(&mod))
return -1;
// Perform semantic analysis.
//
// TODO: Implement a parse-only phase.
Elaborator elab(locs, syms);
elab.elaborate(&mod);
// Find an entry point for evaluation.
//
// TODO: The resolution of main is a little artificial.
// Also, we need to ensure that static initializers
// are evaluated prior to entering main.
//
// TODO: Actually pass command line arguments to main.
if (elab.main) {
Evaluator ev;
Value v = ev.exec(elab.main);
std::cout << "result: " << v << '\n';
} else {
std::cout << "no main\n";
}
}
// Diagnose uncaught translation errors and exit
// gracefully. All other uncaught exceptions are
// ICEs and we want those to fail noisily. Note
// that re-throwing does not re-establish the
// origin of the error for the purpose of debugging.
catch (Translation_error& err) {
diagnose(err);
return -1;
}
// FIXME: Do something with the module.
}