public class Return_c extends Stmt_c implements Return
Return
represents a return
statement in Java.
It may or may not return a value. If not expr()
should return
null.Term.Instance
Modifier and Type | Field and Description |
---|---|
protected Expr |
expr |
exceptions, reachable
Constructor and Description |
---|
Return_c(Position pos,
Expr expr) |
Return_c(Position pos,
Expr expr,
Ext ext) |
Modifier and Type | Method and Description |
---|---|
<T> java.util.List<T> |
acceptCFG(CFGBuilder<?> v,
java.util.List<T> succs)
Visit this term in evaluation order, calling v.edge() for each successor
in succs, if data flows on that edge.
|
Type |
childExpectedType(Expr child,
AscriptionVisitor av)
Get the expected type of a child expression of
this . |
Node |
copy(NodeFactory nf)
Produce a copy of this node using the given NodeFactory.
|
Expr |
expr()
The expression to return, or null.
|
Return |
expr(Expr expr)
Set the expression to return.
|
protected <N extends Return_c> |
expr(N n,
Expr expr) |
Term |
firstChild()
Return the first direct subterm performed when evaluating this term.
|
void |
prettyPrint(CodeWriter w,
PrettyPrinter tr)
Pretty-print the AST using the given
CodeWriter . |
protected <N extends Return_c> |
reconstruct(N n,
Expr expr)
Reconstruct the statement.
|
java.lang.String |
toString() |
Node |
typeCheck(TypeChecker tc)
Type check the AST.
|
Node |
visitChildren(NodeVisitor v)
Visit the children of the node.
|
exceptionCheck, exceptions, exceptions, exceptions, extRewrite, listChild, reachable, reachable, reachable
addDecls, buildTypes, buildTypesEnter, checkConstants, copy, copy, copyIfNeeded, del, del, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, dump, dump, enterChildScope, enterScope, error, error, error, exceptionCheckEnter, ext, ext, ext, ext, extRewriteEnter, isDisambiguated, isTypeChecked, lang, position, position, position, prettyPrint, prettyPrint, prettyPrint, prettyPrint, print, printBlock, printSubStmt, throwTypes, translate, typeCheckEnter, typeCheckOverride, visit, visitChild, visitEdge, visitList
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
exceptions, exceptions, reachable, reachable
del, del, dump, error, error, ext, ext, ext, ext, isDisambiguated, isTypeChecked, position, position, visit, visitEdge
addDecls, buildTypes, buildTypesEnter, checkConstants, copy, disambiguate, disambiguateEnter, disambiguateOverride, dump, dump, dump, dump, enterChildScope, enterScope, exceptionCheck, exceptionCheckEnter, extRewrite, extRewriteEnter, lang, prettyPrint, prettyPrint, prettyPrint, prettyPrint, throwTypes, translate, typeCheckEnter, typeCheckOverride, visitChild, visitList
protected Expr expr
public Expr expr()
Return
public Return expr(Expr expr)
Return
public Node visitChildren(NodeVisitor v)
NodeOps
visitChildren
in interface NodeOps
visitChildren
in class Node_c
v
- The visitor that will traverse/rewrite the AST.this
.public Node typeCheck(TypeChecker tc) throws SemanticException
NodeOps
leave()
method of the
visitor. The method should perform work that should be done
after visiting the children of the node. The method may return
this
or a new copy of the node which will be
installed as a child of the node's parent.typeCheck
in interface NodeOps
typeCheck
in class Node_c
tc
- The type checking visitor.SemanticException
public Type childExpectedType(Expr child, AscriptionVisitor av)
NodeOps
this
.
The expected type is determined by the context in that the child occurs
(e.g., for x = e
, the expected type of e
is
the declared type of x
.
The expected type should impose the least constraints on the child's
type that are allowed by the parent node.childExpectedType
in interface NodeOps
childExpectedType
in class Node_c
child
- A child expression of this node.av
- An ascription visitor.child
.public void prettyPrint(CodeWriter w, PrettyPrinter tr)
Node_c
CodeWriter
.prettyPrint
in interface NodeOps
prettyPrint
in class Node_c
w
- The code writer to which to write.tr
- The pretty printer. This is not a visitor.public Term firstChild()
TermOps
firstChild
in interface TermOps
firstChild
in class Term_c
public <T> java.util.List<T> acceptCFG(CFGBuilder<?> v, java.util.List<T> succs)
TermOps