void raiseSyntaxErrorHelper(const std::string& file, const std::string& func, AST* node_at, const char* msg, ...) {
va_list ap;
va_start(ap, msg);
char buf[1024];
vsnprintf(buf, sizeof(buf), msg, ap);
// TODO I'm not sure that it's safe to raise an exception here, since I think
// there will be things that end up not getting cleaned up.
// Then again, there are a huge number of things that don't get cleaned up even
// if an exception doesn't get thrown...
// TODO output is still a little wrong, should be, for example
//
// File "../test/tests/future_non_existent.py", line 1
// from __future__ import rvalue_references # should cause syntax error
//
// but instead it is
//
// Traceback (most recent call last):
// File "../test/tests/future_non_existent.py", line -1, in :
// from __future__ import rvalue_references # should cause syntax error
raiseSyntaxError(buf, node_at->lineno, node_at->col_offset, file, "");
}
void raiseFutureImportErrorNotBeginning(const char* file, AST* node) {
raiseSyntaxError(file, node, "from __future__ imports must occur at the beginning of the file");
}
void raiseFutureImportErrorNotFound(const char* file, AST* node, const char* name) {
raiseSyntaxError(file, node, "future feature %s is not defined", name);
}