| /** A TreeAdaptor that works with any Tree implementation. It provides |
| * really just factory methods; all the work is done by BaseTreeAdaptor. |
| * If you would like to have different tokens created than ClassicToken |
| * objects, you need to override this and then set the parser tree adaptor to |
| * use your subclass. |
| * |
| * To get your parser to build nodes of a different type, override |
| * create(Token). |
| */ |
| org.antlr.runtime.tree.CommonTreeAdaptor = function() {}; |
| |
| org.antlr.lang.extend(org.antlr.runtime.tree.CommonTreeAdaptor, |
| org.antlr.runtime.tree.BaseTreeAdaptor, { |
| /** Duplicate a node. This is part of the factory; |
| * override if you want another kind of node to be built. |
| * |
| * I could use reflection to prevent having to override this |
| * but reflection is slow. |
| */ |
| dupNode: function(t) { |
| if ( !org.antlr.lang.isValue(t) ) { |
| return null; |
| } |
| return t.dupNode(); |
| }, |
| |
| create: function(payload) { |
| if (arguments.length>1) { |
| return org.antlr.runtime.tree.CommonTreeAdaptor.superclass.create.apply(this, arguments); |
| } |
| return new org.antlr.runtime.tree.CommonTree(payload); |
| }, |
| |
| /** Tell me how to create a token for use with imaginary token nodes. |
| * For example, there is probably no input symbol associated with imaginary |
| * token DECL, but you need to create it as a payload or whatever for |
| * the DECL node as in ^(DECL type ID). |
| * |
| * If you care what the token payload objects' type is, you should |
| * override this method and any other createToken variant. |
| * |
| * Tell me how to create a token for use with imaginary token nodes. |
| * For example, there is probably no input symbol associated with imaginary |
| * token DECL, but you need to create it as a payload or whatever for |
| * the DECL node as in ^(DECL type ID). |
| * |
| * This is a variant of createToken where the new token is derived from |
| * an actual real input token. Typically this is for converting '{' |
| * tokens to BLOCK etc... You'll see |
| * |
| * r : lc='{' ID+ '}' -> ^(BLOCK[$lc] ID+) ; |
| * |
| * If you care what the token payload objects' type is, you should |
| * override this method and any other createToken variant. |
| */ |
| createToken: function(fromToken) { |
| if (arguments.length===2) { |
| return new org.antlr.runtime.CommonToken(arguments[0], arguments[1]); |
| } else { |
| return new org.antlr.runtime.CommonToken(arguments[0]); |
| } |
| }, |
| |
| /** Track start/stop token for subtree root created for a rule. |
| * Only works with Tree nodes. For rules that match nothing, |
| * seems like this will yield start=i and stop=i-1 in a nil node. |
| * Might be useful info so I'll not force to be i..i. |
| */ |
| setTokenBoundaries: function(t, startToken, stopToken) { |
| if ( !org.antlr.lang.isValue(t) ) { |
| return; |
| } |
| var start = 0, |
| stop = 0; |
| if ( org.antlr.lang.isValue(startToken) ) { |
| if (startToken.getTokenIndex) { |
| start = startToken.getTokenIndex(); |
| } else if (startToken.getStartIndex) { |
| start = startToken.getStartIndex(); |
| } else { |
| start = startToken.getTokenStartIndex(); |
| } |
| } |
| if ( org.antlr.lang.isValue(stopToken) ) { |
| if (stop.getTokenIndex) { |
| stop = stopToken.getTokenIndex(); |
| } else if (stopToken.getStopIndex) { |
| stop = stopToken.getStopIndex(); |
| } else { |
| stop = stopToken.getTokenStopIndex(); |
| } |
| } |
| t.setTokenStartIndex(start); |
| t.setTokenStopIndex(stop); |
| }, |
| |
| getTokenStartIndex: function(t) { |
| if (!t) { |
| return -1; |
| } |
| return t.getTokenStartIndex(); |
| }, |
| |
| getTokenStopIndex: function(t) { |
| if (!t) { |
| return -1; |
| } |
| return t.getTokenStopIndex(); |
| }, |
| |
| getText: function(t) { |
| if (!t) { |
| return null; |
| } |
| return t.getText(); |
| }, |
| |
| getType: function(t) { |
| if (!t) { |
| return org.antlr.runtime.Token.INVALID_TOKEN_TYPE; |
| } |
| return t.getType(); |
| }, |
| |
| /** What is the Token associated with this node? If |
| * you are not using CommonTree, then you must |
| * override this in your own adaptor. |
| */ |
| getToken: function(t) { |
| if ( t instanceof org.antlr.runtime.tree.CommonTree ) { |
| return t.getToken(); |
| } |
| return null; // no idea what to do |
| }, |
| |
| getChild: function(t, i) { |
| if (!t) { |
| return null; |
| } |
| return t.getChild(i); |
| }, |
| |
| getChildCount: function(t) { |
| if (!t) { |
| return 0; |
| } |
| return t.getChildCount(); |
| }, |
| |
| getParent: function(t) { |
| return t.getParent(); |
| }, |
| |
| setParent: function(t, parent) { |
| t.setParent(parent); |
| }, |
| |
| getChildIndex: function(t) { |
| return t.getChildIndex(); |
| }, |
| |
| setChildIndex: function(t, index) { |
| t.setChildIndex(index); |
| }, |
| |
| replaceChildren: function(parent, startChildIndex, stopChildIndex, t) { |
| if ( parent ) { |
| parent.replaceChildren(startChildIndex, stopChildIndex, t); |
| } |
| } |
| }); |