/**
* The entry method.
*
* @return int
*/
public function main()
{
while (false !== ($c = $this->getOption($v))) {
switch ($c) {
case 'h':
case '?':
return $this->usage();
case '__ambiguous':
$this->resolveOptionAmbiguity($v);
break;
}
}
$this->parser->listInputs($expression);
$compiler = Compiler\Llk::load(new File\Read('hoa://Library/Math/Arithmetic.pp'));
$visitor = new Math\Visitor\Arithmetic();
$dump = new Compiler\Visitor\Dump();
if (null !== $expression) {
$ast = $compiler->parse($expression);
echo $expression . ' = ' . $visitor->visit($ast), "\n";
return;
}
$readline = new Console\Readline();
$readline->setAutocompleter(new Console\Readline\Autocompleter\Word(array_merge(array_keys($visitor->getConstants()->getArrayCopy()), array_keys($visitor->getFunctions()->getArrayCopy()))));
$handle = null;
$expression = 'h';
do {
switch ($expression) {
case 'h':
case 'help':
echo 'Usage:', "\n", ' h[elp] to print this help;', "\n", ' c[onstants] to print available constants;', "\n", ' f[unctions] to print available functions;', "\n", ' e[xpression] to print the current expression;', "\n", ' d[ump] to dump the tree of the expression;', "\n", ' q[uit] to quit.', "\n";
break;
case 'c':
case 'constants':
echo implode(', ', array_keys($visitor->getConstants()->getArrayCopy())), "\n";
break;
case 'f':
case 'functions':
echo implode(', ', array_keys($visitor->getFunctions()->getArrayCopy())), "\n";
break;
case 'e':
case 'expression':
echo $handle, "\n";
break;
case 'd':
case 'dump':
if (null === $handle) {
echo 'Type a valid expression before (“> 39 + 3”).', "\n";
} else {
echo $dump->visit($compiler->parse($handle)), "\n";
}
break;
case 'q':
case 'quit':
break 2;
default:
if (null === $expression) {
break;
}
try {
echo $visitor->visit($compiler->parse($expression)), "\n";
} catch (Compiler\Exception $e) {
echo $e->getMessage(), "\n";
break;
}
$handle = $expression;
break;
}
} while (false !== ($expression = $readline->readLine('> ')));
return;
}
