public class ReturnExpression extends Expression
Constructor | Description |
---|---|
ReturnExpression(Rule rule,
ParseNode token,
Expression returnValue) |
Modifier and Type | Method | Description |
---|---|---|
void |
bind() |
verify that variables mentioned in this expression are actually available in the supplied
bindings list and infer/validate the type of this expression or its subexpressions
where possible
|
void |
compile(org.objectweb.asm.MethodVisitor mv,
CompileContext compileContext) |
|
Object |
interpret(HelperAdapter helper) |
evaluate the expression by interpreting the expression tree
|
Type |
typeCheck(Type expected) |
ensure that all type references in the expression and its component expressions
can be resolved, that the type of the expression is well-defined and that it is
compatible with the type expected in the context in which it occurs.
|
void |
writeTo(StringWriter stringWriter) |
getPos, getType
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
getBindings, getTypeGroup, rebox, toString
public ReturnExpression(Rule rule, ParseNode token, Expression returnValue)
public void bind() throws TypeException
bind
in class Expression
TypeException
- if any variable is missing or has the wrong typepublic Type typeCheck(Type expected) throws TypeException
typeCheck
in class Expression
expected
- the type expected for the expression in the contxt in which it occurs. this
may be void but should not be undefined at the point where type checking is performed.TypeException
- if type checking failspublic Object interpret(HelperAdapter helper) throws ExecuteException
interpret
in class Expression
helper
- an execution context associated with the rule whcih contains a map of
current bindings for rule variables and another map of their declared types both of which
are indexed by varoable name. This includes entries for the helper (name "-1"), the
recipient if the trigger method is not static (name "0") and the trigger method arguments
(names "1", ...)ExecuteException
- if an error occurs during executionpublic void compile(org.objectweb.asm.MethodVisitor mv, CompileContext compileContext) throws CompileException
compile
in class RuleElement
CompileException
public void writeTo(StringWriter stringWriter)
writeTo
in class Expression
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