Top Description Methods
org.antlr.v4.runtime.tree

public Interface SyntaxTree

extends Tree
Known Direct Subinterfaces
org.antlr.v4.runtime.tree.ParseTree
Imports
org.antlr.v4.runtime.TokenStream, org.antlr.v4.runtime.misc.Interval
A tree that knows about an interval in a token stream is some kind of syntax tree. Subinterfaces distinguish between parse trees and other kinds of syntax trees we might want to create.

Method Summary

Modifier and TypeMethod and Description
public Interval
getSourceInterval()

Return an Interval indicating the index in the TokenStream of the first and last token associated with this subtree.

Inherited from org.antlr.v4.runtime.tree.Tree:
getChildgetChildCountgetParentgetPayloadtoStringTree

Method Detail

getSourceIntervalback to summary
public Interval getSourceInterval()

Return an Interval indicating the index in the TokenStream of the first and last token associated with this subtree. If this node is a leaf, then the interval represents a single token and has interval i..i for token index i.

An interval of i..i-1 indicates an empty interval at position i in the input stream, where 0 <= i <= the size of the input token stream. Currently, the code base can only have i=0..n-1 but in concept one could have an empty interval after EOF.

If source interval is unknown, this returns Interval#INVALID.

As a weird special case, the source interval for rules matched after EOF is unspecified.