function parseFunction($ast)
{
assert_ast_type($ast, NodeType::FUNC);
$data = ast_node_data($ast);
$name = parseIdentifier(ast_get($data, NodeKey::NAME));
$args = parseExpressionList(ast_get($data, NodeKey::ARGS));
$targs = parseTemplateArgs(ast_get($data, NodeKey::TARGS));
$targs = is_null($targs) ? [] : $targs;
$source = ast_node_source($ast);
$arg_types = array_map(function ($item) {
return $item->type();
}, $args);
try {
$func = lookupFunction($name, $arg_types, $targs);
} catch (Exception $e) {
grokit_error('Failed to find function ' . $name . ' called from ' . $source, $e);
}
$info = $func->apply($args, $source);
// If the function is deterministic and all of the expressions were constant,
// just turn this expression into a constant.
if ($info->is_const()) {
$info->makeConstant();
}
return $info;
}
function convertExpression(grokit\ExpressionInfo &$expression, $type, $source = null)
{
if ($source === null) {
$source = $expression->source();
}
grokit_logic_assert(canConvert($expression->type(), $type), 'Unable to convert expression from type ' . $expression->type() . ' to type ' . $type);
if ($expression->type() == $type) {
return $expression;
}
$func = lookupFunction(strval($type), [$expression->type()], []);
//fwrite(STDERR, "Convert: source(" . $expression->type() . ") dest(" . $type . ")" . PHP_EOL);
//fwrite(STDERR, print_r($func, true));
$info = $func->apply([$expression], $source);
if ($info->is_const()) {
$info->makeConstant();
}
return $info;
}