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Alias

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- Implemented simple word substitution aliases. This is not the ultimate form
  which will involve the ability to insert arbitrary constructs.  Later.
This commit is contained in:
Paul Beckingham 2014-06-03 00:10:15 -04:00
parent a470e50ee6
commit 1cd09bc87b
7 changed files with 42 additions and 41 deletions
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36
src/Alias.cpp
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@ -35,7 +35,7 @@
extern Context context;
// Alias expansion limit. Any more indicates some kind of error.
// Alias expansion limit. Any more indicates some kind of error.
const int safetyValveDefault = 10;
////////////////////////////////////////////////////////////////////////////////
@ -64,6 +64,9 @@ void Alias::load ()
////////////////////////////////////////////////////////////////////////////////
// An alias must be a distinct word on the command line.
//
// TODO This is straight word substitution. What this really needs is node
// insertion, for more advanced aliases.
void Alias::resolve (Tree* tree)
{
bool something;
@ -85,20 +88,27 @@ void Alias::resolve (Tree* tree)
if (! (*i)->hasTag ("?"))
continue;
std::string raw = (*i)->attribute ("raw");
std::map <std::string, std::string>::iterator match = context.aliases.find (raw);
if (match != context.aliases.end ())
std::map <std::string, std::string>::iterator a;
if ((*i)->_branches.size ())
{
something = true;
std::vector <std::string> words;
Lexer::word_split (words, context.aliases[raw]);
std::vector <std::string>::iterator word;
for (word = words.begin (); word != words.end (); ++word)
std::vector <Tree*>::iterator b;
for (b = (*i)->_branches.begin (); b != (*i)->_branches.end (); ++b)
{
// TODO Insert branch (words) in place of (*i).
std::cout << "# alias word '" << *word << "'\n";
a = _aliases.find ((*b)->attribute ("raw"));
if (a != _aliases.end ())
{
(*b)->attribute ("raw", a->second);
something = true;
}
}
}
else
{
a = _aliases.find ((*i)->attribute ("raw"));
if (a != _aliases.end ())
{
(*i)->attribute ("raw", a->second);
something = true;
}
}
}