/**
* Apply processing to a single node
*
* @param Node $node
*/
public function applyToNode(Node $node)
{
$expression = $node->getInstruction($this);
$ast = $this->getParser()->parse($expression);
$variables = $node->getResult() ?: [];
$arithmetic = new Hoa\Math\Visitor\Arithmetic();
foreach ($variables as $name => $value) {
// Constants are upper case and variables lower case. We don't really care, so using a workaround.
if (preg_match('/^[A-Z_][A-Z0-9_]*$/', $name)) {
$arithmetic->addConstant($name, $value);
} else {
$arithmetic->addVariable($name, function () use($value) {
return $value;
});
}
}
$result = $arithmetic->visit($ast);
$node->setResult($result);
}
public function case_visitor_variable()
{
$this->given($compiler = Compiler\Llk\Llk::load(new File\Read('hoa://Library/Math/Arithmetic.pp')), $visitor = new CUT(), $variableName = 'a_variable', $variableValue = 42)->when($visitor->addVariable($variableName, function () use($variableValue) {
return $variableValue;
}))->then->float($visitor->visit($compiler->parse($variableName . ' * 2')))->isEqualTo($variableValue * 2);
}