Parsing code with newlines
On 4/5/19 8:14 AM, Mikhail Titov wrote:
Hello! This is my first post here. I came across the very same problem. It can be reproduced within modified tests/Embedding/RParseEval.c
Please check https://www.r-project.org/posting-guide.html and update your post if you still need to get help here - from your current post I am not sure what you did, what was the error you got and from which tool, why you think the error was a result of something not working correctly/as documented, etc. The original post with the same subject you are probably referring to had the same problem. Please also note that "tests" (tests/Embedding/RParseEval.c) are not examples - if they do not catch R errors in some cases that is perfectly ok, they also may use internal API that is indeed not documented e.g. in Writing R Extensions. Note Writing R Extensions has a section on embedding R and on cleanup handlers. Best Tomas
Actually this example has another issue, namely it doesn't wrap
everything in R_ToplevelExec . This is a major show stopper for
newcomers as that function is barely mentioned anywhere and longjmp into
terminated setuploop function followed by R_suicide look like a mystery.
Error: bad value
Fatal error: unable to initialize the JIT
That aside, here is the code with newlines that fails to parse. I hope
it will paste alright here.
#include "embeddedRCall.h"
#include <R_ext/Parse.h>
int
main(int argc, char *argv[])
{
SEXP e, tmp;
int hadError;
ParseStatus status;
init_R(argc, argv);
PROTECT(tmp = mkString("\n\r ls()"));
PROTECT(e = R_ParseVector(tmp, 1, &status, R_NilValue));
if (status != PARSE_OK)
{
printf("boo boo\n");
}
else
{
PrintValue(e);
R_tryEval(VECTOR_ELT(e,0), R_GlobalEnv, &hadError);
}
UNPROTECT(2);
end_R();
return(0);
}
--
Mikhail
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