Package net.emustudio.edigen.passes

Class ResolveNamesVisitor

java.lang.Object

net.emustudio.edigen.Visitor

net.emustudio.edigen.passes.ResolveNamesVisitor

public class ResolveNamesVisitor
extends Visitor

A visitor which creates associations between objects according to their names obtained from the input file.

Missing implicit subrules are inferred.

Because the AST was constructed in one pass, backward references are not yet solved. This visitor resolves them (along with the backward references).

Constructor Summary

Constructors

Constructor	Description
ResolveNamesVisitor()

Method Summary

Modifier and Type	Method	Description
void	visit(Decoder decoder)	First saves all rule names and then traverses the rule subtrees.
void	visit(Rule rule)	Adds item(s) to the map from rule names to rules.
void	visit(Subrule subrule)	Associates the subrule with the rule.
void	visit(Value value)	Associates the value with the rule.
void	visit(Variant variant)	Associates the variant with the subrule which it returns.

Methods inherited from class net.emustudio.edigen.Visitor

visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ResolveNamesVisitor

public ResolveNamesVisitor()

Method Detail

visit

public void visit(Decoder decoder)
           throws SemanticException

First saves all rule names and then traverses the rule subtrees.

Overrides:

visit in class Visitor

Parameters:

decoder - the decoder node

Throws:

SemanticException - never

visit

public void visit(Rule rule)
           throws SemanticException

Adds item(s) to the map from rule names to rules.

Overrides:

visit in class Visitor

Parameters:

rule - the rule node

Throws:

SemanticException - if the rule was already defined

visit

public void visit(Variant variant)
           throws SemanticException

Associates the variant with the subrule which it returns.

Overrides:

visit in class Visitor

Parameters:

variant - the variant node

Throws:

SemanticException - if the variant returns nonexistent subrule

visit

public void visit(Subrule subrule)
           throws SemanticException

Associates the subrule with the rule.

Overrides:

visit in class Visitor

Parameters:

subrule - the subrule node

Throws:

SemanticException - on subrule-related semantic errors

visit

public void visit(Value value)
           throws SemanticException

Associates the value with the rule.

Overrides:

visit in class Visitor

Parameters:

value - the value node

Throws:

SemanticException - if the value refers to a nonexistent rule