public abstract class CSTNode
extends Object

Method Detail

public CSTNode add(CSTNode element)

Adds an element to the node. Returns the element for convenience. Not all nodes support this operation!

public void addChildrenOf(CSTNode of)

Adds all children of the specified node to this one. Not all nodes support this operation!

public abstract Reduction asReduction()

Creates a Reduction from this node. Returns self if the node is already a Reduction.

public boolean canMean(int type)

Returns true if the node can be coerced to the specified type.

public int children()

Returns the number of non-root elements in the node.

public abstract CSTNode get(int index)

Returns the specified element, or null.

public CSTNode get(int index, boolean safe)

Returns the specified element, or Token.NULL if safe is set and the specified element is null (or doesn't exist).

public String getDescription()

Returns a description of the node.

public int getMeaning()

Returns the meaning of this node. If the node isEmpty(), returns the type of Token.NULL.

public int getMeaningAs(int[] types)

Returns the first matching meaning of the specified types. Returns Types.UNKNOWN if there are no matches.

public abstract Token getRoot()

Returns the root of the node. By convention, all nodes have a Token as the first element (or root), which indicates the type of the node. May return null if the node isEmpty().

public Token getRoot(boolean safe)

Returns the root of the node, the Token that indicates its type. Returns a Token.NULL if safe and the actual root is null.

public String getRootText()

Returns the text of the root. Uses getRoot(true) to get the root, so you will only receive null in return if the root token returns it.

public int getStartColumn()

Returns the starting column of the node. Returns -1 if not known.

public int getStartLine()

Returns the starting line of the node. Returns -1 if not known.

public int getType()

Returns the actual type of the node. If the node isEmpty(), returns the type of Token.NULL.

public boolean hasChildren()

Returns true if the node has any non-root elements.

public boolean isA(int type)

Returns true if the node's meaning matches the specified type.

public boolean isAllOf(int[] types)

Returns true if the node's meaning matches all of the specified types.

public boolean isAnExpression()

Returns true if the node is a complete expression.

public boolean isEmpty()

Returns true if the node is completely empty (no root, even).

public boolean isOneOf(int[] types)

Returns true if the node's meaning matches any of the specified types.

public void markAsExpression()

Marks the node a complete expression. Not all nodes support this operation!

public CSTNode set(int index, CSTNode element)

Sets an element node in at the specified index. Returns the element for convenience. Not all nodes support this operation!

public CSTNode setMeaning(int meaning)

Sets the meaning for this node (and its root Token). Not valid if the node isEmpty(). Returns the node, for convenience.

public abstract int size()

Returns the number of elements in the node (including root).

public String toString()

Formats the node as a String and returns it.

public void write(PrintWriter writer)

Formats the node and writes it to the specified Writer.

protected void write(PrintWriter writer, String indent)

Formats the node and writes it to the specified Writer. The indent is prepended to each output line, and is increased for each recursion.