Added element comments to all classes of the expression parser.

Also fixed some id() implementations.

src/main/java/com/sk89q/worldedit/expression/parser/Parser.java

@@ -34,6 +34,13 @@ import com.sk89q.worldedit.expression.runtime.Constant;
 import com.sk89q.worldedit.expression.runtime.Functions;
 import com.sk89q.worldedit.expression.runtime.RValue;
 
+/**
+ * Processes a list of tokens into an executable tree.
+ *
+ * Tokens can be numbers, identifiers, operators and assorted other characters.
+ *
+ * @author TomyLobo
+ */
 public class Parser {
     private final class NullToken extends Token {
         private NullToken(int position) {

src/main/java/com/sk89q/worldedit/expression/parser/ParserException.java

@@ -21,6 +21,11 @@ package com.sk89q.worldedit.expression.parser;
 
 import com.sk89q.worldedit.expression.ExpressionException;
 
+/**
+ * Thrown when the parser encounters a problem.
+ *
+ * @author TomyLobo
+ */
 public class ParserException extends ExpressionException {
     private static final long serialVersionUID = 1L;
 

src/main/java/com/sk89q/worldedit/expression/parser/ParserProcessors.java

@@ -13,6 +13,11 @@ import com.sk89q.worldedit.expression.runtime.RValue;
 import com.sk89q.worldedit.expression.runtime.Operators;
 import com.sk89q.worldedit.expression.runtime.Sequence;
 
+/**
+ * Helper classfor Parser. Contains processors for statements and operators.
+ *
+ * @author TomyLobo
+ */
 public final class ParserProcessors {
     private static final Map<String, String> unaryOpMap = new HashMap<String, String>();
 

src/main/java/com/sk89q/worldedit/expression/parser/PrefixOperator.java

@@ -2,6 +2,11 @@ package com.sk89q.worldedit.expression.parser;
 
 import com.sk89q.worldedit.expression.lexer.tokens.OperatorToken;
 
+/**
+ * The parser uses this pseudo-token to mark operators as prefix operators.
+ *
+ * @author TomyLobo
+ */
 public class PrefixOperator extends PseudoToken {
     final String operator;
 

src/main/java/com/sk89q/worldedit/expression/parser/PseudoToken.java

@@ -21,6 +21,11 @@ package com.sk89q.worldedit.expression.parser;
 
 import com.sk89q.worldedit.expression.Identifiable;
 
+/**
+ * A pseudo-token, inserted by the parser instead of the lexer.
+ *
+ * @author TomyLobo
+ */
 public abstract class PseudoToken implements Identifiable {
     private final int position;