1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
#include "rules.ih"
void Rules::updatePrecedence(Production *production)
{
if (production->precedence()) // a precedence has already been set
return;
auto symbolIter =
find_if(production->begin(), production->end(), isTerminal);
if (symbolIter != production->end())
production->setPrecedence(Terminal::downcast(*symbolIter));
}
// elaborate compound stmnt after if (production->precedence):
// {
// if
// (
// not (*production)[0].isTerminal()
// ||
// production->size() < 2
// ||
// not (*production)[1].isNonTerminal()
// )
// {
// emsg.setTag(production->fileName() + ": error");
// emsg.setLineNr(production->lineNr());
// emsg << "Rule " << production <<
// " %prec " << production->precedence() <<
// ": 1st element must be a terminal token, 2nd "
// "element a non-terminal token" << endl;
// }
// return;
// }
|
