|
public static fromNode ( |
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| $context | The context in which the node appears | |
| $code_base | ||
| $node | ast\Node\Decl | An AST node representing a function |
| $fqsen | A fully qualified name for the function | |
| return | A Func representing the AST node in the given context | |
/**
* Visit a node with kind `\ast\AST_FUNC_DECL`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitFuncDecl(Decl $node) : Context
{
$function_name = (string) $node->name;
// Hunt for an un-taken alternate ID
$alternate_id = 0;
$function_fqsen = null;
do {
$function_fqsen = FullyQualifiedFunctionName::fromStringInContext($function_name, $this->context)->withNamespace($this->context->getNamespace())->withAlternateId($alternate_id++);
} while ($this->code_base->hasFunctionWithFQSEN($function_fqsen));
$func = Func::fromNode($this->context->withLineNumberStart($node->lineno ?? 0)->withLineNumberEnd($node->endLineno ?? 0), $this->code_base, $node, $function_fqsen);
$this->code_base->addFunction($func);
// Send the context into the function and reset the scope
$context = $this->context->withScope($func->getInternalScope());
return $context;
}
/**
* Visit a node with kind `\ast\AST_FUNC_DECL`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitFuncDecl(Decl $node) : Context
{
$function_name = (string) $node->name;
// Hunt for an un-taken alternate ID
$alternate_id = 0;
$function_fqsen = null;
do {
$function_fqsen = FullyQualifiedFunctionName::fromStringInContext($function_name, $this->context)->withNamespace($this->context->getNamespace())->withAlternateId($alternate_id++);
} while ($this->code_base->hasFunctionWithFQSEN($function_fqsen));
$func = Func::fromNode($this->context->withLineNumberStart($node->lineno ?? 0)->withLineNumberEnd($node->endLineno ?? 0), $this->code_base, $node);
$func->setFQSEN($function_fqsen);
$this->code_base->addFunction($func);
// Send the context into the function and reset the scope
$context = $this->context->withMethodFQSEN($function_fqsen)->withScope(new Scope());
// Add each method parameter to the scope. We clone it
// so that changes to the variable don't alter the
// parameter definition
foreach ($func->getParameterList() as $parameter) {
$context->addScopeVariable(clone $parameter);
}
return $context;
}
/**
* Visit a node with kind `\ast\AST_CLOSURE`
*
* @param Node $node
* A node to parse
*
* @return Context
* A new or an unchanged context resulting from
* parsing the node
*/
public function visitClosure(Decl $node) : Context
{
$closure_fqsen = FullyQualifiedFunctionName::fromClosureInContext($this->context->withLineNumberStart($node->lineno ?? 0));
$func = Func::fromNode($this->context, $this->code_base, $node, $closure_fqsen);
// If we have a 'this' variable in our current scope,
// pass it down into the closure
if ($this->context->getScope()->hasVariableWithName('this')) {
$func->getInternalScope()->addVariable($this->context->getScope()->getVariableByName('this'));
}
// Make the closure reachable by FQSEN from anywhere
$this->code_base->addFunction($func);
if (!empty($node->children['uses']) && $node->children['uses']->kind == \ast\AST_CLOSURE_USES) {
$uses = $node->children['uses'];
foreach ($uses->children as $use) {
if ($use->kind != \ast\AST_CLOSURE_VAR) {
$this->emitIssue(Issue::VariableUseClause, $node->lineno ?? 0);
continue;
}
$variable_name = (new ContextNode($this->code_base, $this->context, $use->children['name']))->getVariableName();
if (empty($variable_name)) {
continue;
}
$variable = null;
// Check to see if the variable exists in this scope
if (!$this->context->getScope()->hasVariableWithName($variable_name)) {
// If this is not pass-by-reference variable we
// have a problem
if (!($use->flags & \ast\flags\PARAM_REF)) {
$this->emitIssue(Issue::UndeclaredVariable, $node->lineno ?? 0, $variable_name);
continue;
} else {
// If the variable doesn't exist, but its
// a pass-by-reference variable, we can
// just create it
$variable = Variable::fromNodeInContext($use, $this->context, $this->code_base, false);
}
} else {
$variable = $this->context->getScope()->getVariableByName($variable_name);
// If this isn't a pass-by-reference variable, we
// clone the variable so state within this scope
// doesn't update the outer scope
if (!($use->flags & \ast\flags\PARAM_REF)) {
$variable = clone $variable;
}
}
// Pass the variable into a new scope
$func->getInternalScope()->addVariable($variable);
}
}
// Add all parameters to the scope
if (!empty($node->children['params']) && $node->children['params']->kind == \ast\AST_PARAM_LIST) {
$params = $node->children['params'];
foreach ($params->children as $param) {
// Read the parameter
$parameter = Parameter::fromNode($this->context, $this->code_base, $param);
// Add it to the scope
$func->getInternalScope()->addVariable($parameter);
}
}
if ($this->analyzeFunctionLikeIsGenerator($node)) {
$this->setReturnTypeOfGenerator($func, $node);
}
return $this->context->withScope($func->getInternalScope());
}
