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Parser

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- Implemented ::resolveAliases to expand them.
This commit is contained in:
Paul Beckingham 2014-07-03 22:40:43 -04:00
parent 4a063843b1
commit c65b30fbba
1 changed files with 47 additions and 1 deletions
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48
src/Parser.cpp
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@ -25,7 +25,6 @@
////////////////////////////////////////////////////////////////////////////////
#include <cmake.h>
#include <iostream>
#include <stdlib.h>
#include <unistd.h>
#include <Context.h>
@ -47,6 +46,9 @@ extern Context context;
// Overridden by rc.abbreviation.minimum.
static int minimumMatchLength = 3;
// Alias expansion limit. Any more indicates some kind of error.
static int safetyValveDefault = 10;
////////////////////////////////////////////////////////////////////////////////
Parser::Parser ()
{
@ -331,6 +333,50 @@ void Parser::findTerminator ()
////////////////////////////////////////////////////////////////////////////////
void Parser::resolveAliases ()
{
bool something;
int safety_valve = safetyValveDefault;
do
{
something = false;
std::vector <Tree*>::iterator i;
for (i = _tree->_branches.begin (); i != _tree->_branches.end (); ++i)
{
// Parser override operator.
if ((*i)->attribute ("raw") == "--")
break;
std::map <std::string, std::string>::iterator a;
if ((*i)->_branches.size ())
{
std::vector <Tree*>::iterator b;
for (b = (*i)->_branches.begin (); b != (*i)->_branches.end (); ++b)
{
a = _aliases.find ((*b)->attribute ("raw"));
if (a != _aliases.end ())
{
(*b)->attribute ("raw", a->second);
(*b)->tag ("ALIAS");
something = true;
}
}
}
else
{
a = _aliases.find ((*i)->attribute ("raw"));
if (a != _aliases.end ())
{
(*i)->attribute ("raw", a->second);
(*i)->tag ("ALIAS");
something = true;
}
}
}
}
while (something && --safety_valve > 0);
if (safety_valve <= 0)
context.debug (format ("Nested alias limit of {1} reached.", safetyValveDefault));
}
////////////////////////////////////////////////////////////////////////////////