function parseGT($ast)
{
assert_ast_type($ast, [NodeType::GT, NodeType::REFERENCE]);
$type = ast_node_type($ast);
$data = ast_node_data($ast);
$source = ast_node_source($ast);
switch ($type) {
case NodeType::GT:
$name = ast_get($data, NodeKey::NAME);
$t_args = parseTemplateArgs(ast_get($data, NodeKey::TARGS));
$alias = ast_has($data, NodeKey::ALIAS) ? null : parseIdentifier(ast_get($data, NodeKey::ALIAS));
return new GT_Spec($source, $name, $t_args, $alias);
break;
case NodeType::REFERENCE:
$info = parseReference($ast);
grokit_assert($info->isGT(), 'Tried to look up reference as a GT, got a ' . $info->kind() . 'instead ' . $source);
return $info;
break;
}
}
function ast_node_data($ast)
{
grokit_logic_assert(ast_has($ast, NodeKey::NODE_DATA), 'Attempted to get data of non-node value.');
return ast_get($ast, NodeKey::NODE_DATA);
}
function parseSelectionWP($ast, $name, $header)
{
// Push LibraryManager so we can undo this waypoint's definitions.
ob_start();
LibraryManager::Push();
$res = new GenerationInfo();
/*************** PROCESS AST ***************/
$attMap = parseAttributeMap(ast_get($ast, NodeKey::ATT_MAP), $res);
$qFilters = ast_get($ast, NodeKey::FILTERS);
$qSynth = ast_get($ast, NodeKey::SYNTH);
$queries = [];
foreach ($qFilters as $query => $qInfo) {
$filterAST = ast_get($qInfo, NodeKey::ARGS);
$gfAST = ast_get($qInfo, NodeKey::TYPE);
if ($gfAST !== null) {
$filter = parseNamedExpressionList($filterAST);
} else {
$filter = parseExpressionList($filterAST);
}
$gf = null;
if ($gfAST !== null) {
$gf = parseGF($gfAST);
$gf = $gf->apply($filter);
}
if (ast_has($qInfo, NodeKey::CARGS)) {
$cargs = parseLiteralList(ast_get($qInfo, NodeKey::CARGS));
} else {
$cargs = [];
}
$sargs = ast_has($qInfo, NodeKey::SARGS) ? parseStateList(ast_get($qInfo, NodeKey::SARGS), $query) : [];
$synths = array();
$synthAST = ast_get($ast, NodeKey::SYNTH);
if (ast_has($synthAST, $query)) {
$curSynths = ast_get($synthAST, $query);
foreach ($curSynths as $curSynthAST) {
$expr = parseExpression(ast_get($curSynthAST, NodeKey::EXPR));
$att = parseAttribute(ast_get($curSynthAST, NodeKey::ATT));
if ($att->type() == null) {
AttributeManager::setAttributeType($att->name(), $expr->type());
$att = AttributeManager::lookupAttribute($att->name());
} else {
if (canConvert($expr, $att->type())) {
$expr = convertExpression($expr, $att->type());
} else {
grokit_error('Unable to convert expression for synthesized attribute ' . $att->name() . ' from type ' . $expr->type() . ' to type ' . $att->type() . ' ' . $expr->source());
}
}
$synths[$att->name()] = $expr;
}
}
$info = ['filters' => $filter, 'synths' => $synths, 'gf' => $gf, 'cargs' => $cargs, 'states' => $sargs];
$queries[$query] = $info;
$res->addJob($query, $name);
$res->absorbInfoList($filter);
$res->absorbInfoList($synths);
$res->absorbInfoList($cargs);
$res->absorbStateList($sargs);
if ($gf !== null) {
$res->absorbInfo($gf);
}
}
/*************** END PROCESS AST ***************/
// Get this waypoint's headers
$myHeaders = $header . PHP_EOL . ob_get_clean();
// Only one file at the moment
$filename = $name . '.cc';
$res->addFile($filename, $name);
_startFile($filename);
SelectionGenerate($name, $queries, $attMap);
_endFile($filename, $myHeaders);
// Pop LibraryManager again to get rid of this waypoint's declarations
LibraryManager::Pop();
return $res;
}