--- a/langtools/src/share/classes/com/sun/tools/javac/parser/Parser.java Tue Sep 09 10:28:21 2008 -0700
+++ b/langtools/src/share/classes/com/sun/tools/javac/parser/Parser.java Tue Sep 09 10:40:50 2008 -0700
@@ -23,2834 +23,44 @@
* have any questions.
*/
+
package com.sun.tools.javac.parser;
-import java.util.*;
-
-import com.sun.tools.javac.tree.*;
-import com.sun.tools.javac.code.*;
-import com.sun.tools.javac.util.*;
-import com.sun.tools.javac.util.List;
-import static com.sun.tools.javac.util.ListBuffer.lb;
-
-import com.sun.tools.javac.tree.JCTree.*;
-
-import static com.sun.tools.javac.parser.Token.*;
-
-/** The parser maps a token sequence into an abstract syntax
- * tree. It operates by recursive descent, with code derived
- * systematically from an LL(1) grammar. For efficiency reasons, an
- * operator precedence scheme is used for parsing binary operation
- * expressions.
- *
- * <p><b>This is NOT part of any API supported by Sun Microsystems. If
- * you write code that depends on this, you do so at your own risk.
- * This code and its internal interfaces are subject to change or
- * deletion without notice.</b>
- */
-public class Parser {
-
- /** A factory for creating parsers. */
- public static class Factory {
- /** The context key for the parser factory. */
- protected static final Context.Key<Parser.Factory> parserFactoryKey =
- new Context.Key<Parser.Factory>();
-
- /** Get the Factory instance for this context. */
- public static Factory instance(Context context) {
- Factory instance = context.get(parserFactoryKey);
- if (instance == null)
- instance = new Factory(context);
- return instance;
- }
-
- final TreeMaker F;
- final Log log;
- final Keywords keywords;
- final Source source;
- final Name.Table names;
- final Options options;
-
- /** Create a new parser factory. */
- protected Factory(Context context) {
- context.put(parserFactoryKey, this);
- this.F = TreeMaker.instance(context);
- this.log = Log.instance(context);
- this.names = Name.Table.instance(context);
- this.keywords = Keywords.instance(context);
- this.source = Source.instance(context);
- this.options = Options.instance(context);
- }
-
- /**
- * Create a new Parser.
- * @param S Lexer for getting tokens while parsing
- * @param keepDocComments true if javadoc comments should be kept
- * @param genEndPos true if end positions should be generated
- */
- public Parser newParser(Lexer S, boolean keepDocComments, boolean genEndPos) {
- if (!genEndPos)
- return new Parser(this, S, keepDocComments);
- else
- return new EndPosParser(this, S, keepDocComments);
- }
- }
-
- /** The number of precedence levels of infix operators.
- */
- private static final int infixPrecedenceLevels = 10;
-
- /** The scanner used for lexical analysis.
- */
- private Lexer S;
-
- /** The factory to be used for abstract syntax tree construction.
- */
- protected TreeMaker F;
-
- /** The log to be used for error diagnostics.
- */
- private Log log;
-
- /** The keyword table. */
- private Keywords keywords;
-
- /** The Source language setting. */
- private Source source;
-
- /** The name table. */
- private Name.Table names;
-
- /** Construct a parser from a given scanner, tree factory and log.
- */
- protected Parser(Factory fac,
- Lexer S,
- boolean keepDocComments) {
- this.S = S;
- S.nextToken(); // prime the pump
- this.F = fac.F;
- this.log = fac.log;
- this.names = fac.names;
- this.keywords = fac.keywords;
- this.source = fac.source;
- Options options = fac.options;
- this.allowGenerics = source.allowGenerics();
- this.allowVarargs = source.allowVarargs();
- this.allowAsserts = source.allowAsserts();
- this.allowEnums = source.allowEnums();
- this.allowForeach = source.allowForeach();
- this.allowStaticImport = source.allowStaticImport();
- this.allowAnnotations = source.allowAnnotations();
- this.keepDocComments = keepDocComments;
- if (keepDocComments) docComments = new HashMap<JCTree,String>();
- this.errorTree = F.Erroneous();
- }
-
- /** Switch: Should generics be recognized?
- */
- boolean allowGenerics;
-
- /** Switch: Should varargs be recognized?
- */
- boolean allowVarargs;
-
- /** Switch: should we recognize assert statements, or just give a warning?
- */
- boolean allowAsserts;
-
- /** Switch: should we recognize enums, or just give a warning?
- */
- boolean allowEnums;
-
- /** Switch: should we recognize foreach?
- */
- boolean allowForeach;
-
- /** Switch: should we recognize foreach?
- */
- boolean allowStaticImport;
+import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
+import com.sun.tools.javac.tree.JCTree.JCExpression;
+import com.sun.tools.javac.tree.JCTree.JCStatement;
- /** Switch: should we recognize annotations?
- */
- boolean allowAnnotations;
-
- /** Switch: should we keep docComments?
- */
- boolean keepDocComments;
-
- /** When terms are parsed, the mode determines which is expected:
- * mode = EXPR : an expression
- * mode = TYPE : a type
- * mode = NOPARAMS : no parameters allowed for type
- * mode = TYPEARG : type argument
- */
- static final int EXPR = 1;
- static final int TYPE = 2;
- static final int NOPARAMS = 4;
- static final int TYPEARG = 8;
-
- /** The current mode.
- */
- private int mode = 0;
-
- /** The mode of the term that was parsed last.
- */
- private int lastmode = 0;
-
-/* ---------- error recovery -------------- */
-
- private JCErroneous errorTree;
-
- /** Skip forward until a suitable stop token is found.
- */
- private void skip(boolean stopAtImport, boolean stopAtMemberDecl, boolean stopAtIdentifier, boolean stopAtStatement) {
- while (true) {
- switch (S.token()) {
- case SEMI:
- S.nextToken();
- return;
- case PUBLIC:
- case FINAL:
- case ABSTRACT:
- case MONKEYS_AT:
- case EOF:
- case CLASS:
- case INTERFACE:
- case ENUM:
- return;
- case IMPORT:
- if (stopAtImport)
- return;
- break;
- case LBRACE:
- case RBRACE:
- case PRIVATE:
- case PROTECTED:
- case STATIC:
- case TRANSIENT:
- case NATIVE:
- case VOLATILE:
- case SYNCHRONIZED:
- case STRICTFP:
- case LT:
- case BYTE:
- case SHORT:
- case CHAR:
- case INT:
- case LONG:
- case FLOAT:
- case DOUBLE:
- case BOOLEAN:
- case VOID:
- if (stopAtMemberDecl)
- return;
- break;
- case IDENTIFIER:
- if (stopAtIdentifier)
- return;
- break;
- case CASE:
- case DEFAULT:
- case IF:
- case FOR:
- case WHILE:
- case DO:
- case TRY:
- case SWITCH:
- case RETURN:
- case THROW:
- case BREAK:
- case CONTINUE:
- case ELSE:
- case FINALLY:
- case CATCH:
- if (stopAtStatement)
- return;
- break;
- }
- S.nextToken();
- }
- }
-
- private JCErroneous syntaxError(int pos, String key, Token... args) {
- return syntaxError(pos, null, key, args);
- }
-
- private JCErroneous syntaxError(int pos, List<JCTree> errs, String key, Token... args) {
- setErrorEndPos(pos);
- reportSyntaxError(pos, key, (Object[])args);
- return toP(F.at(pos).Erroneous(errs));
- }
-
- private int errorPos = Position.NOPOS;
+/**
+ * Reads syntactic units from source code.
+ * Parsers are normally created from a ParserFactory.
+ *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ */
+public interface Parser {
/**
- * Report a syntax error at given position using the given
- * argument unless one was already reported at the same position.
- */
- private void reportSyntaxError(int pos, String key, Object... args) {
- if (pos > S.errPos() || pos == Position.NOPOS) {
- if (S.token() == EOF)
- log.error(pos, "premature.eof");
- else
- log.error(pos, key, args);
- }
- S.errPos(pos);
- if (S.pos() == errorPos)
- S.nextToken(); // guarantee progress
- errorPos = S.pos();
- }
-
-
- /** Generate a syntax error at current position unless one was already
- * reported at the same position.
- */
- private JCErroneous syntaxError(String key) {
- return syntaxError(S.pos(), key);
- }
-
- /** Generate a syntax error at current position unless one was
- * already reported at the same position.
- */
- private JCErroneous syntaxError(String key, Token arg) {
- return syntaxError(S.pos(), key, arg);
- }
-
- /** If next input token matches given token, skip it, otherwise report
- * an error.
+ * Parse a compilation unit.
+ * @return a compilation unit
*/
- public void accept(Token token) {
- if (S.token() == token) {
- S.nextToken();
- } else {
- setErrorEndPos(S.pos());
- reportSyntaxError(S.prevEndPos(), "expected", token);
- }
- }
-
- /** Report an illegal start of expression/type error at given position.
- */
- JCExpression illegal(int pos) {
- setErrorEndPos(S.pos());
- if ((mode & EXPR) != 0)
- return syntaxError(pos, "illegal.start.of.expr");
- else
- return syntaxError(pos, "illegal.start.of.type");
-
- }
-
- /** Report an illegal start of expression/type error at current position.
- */
- JCExpression illegal() {
- return illegal(S.pos());
- }
-
- /** Diagnose a modifier flag from the set, if any. */
- void checkNoMods(long mods) {
- if (mods != 0) {
- long lowestMod = mods & -mods;
- log.error(S.pos(), "mod.not.allowed.here",
- Flags.asFlagSet(lowestMod));
- }
- }
-
-/* ---------- doc comments --------- */
-
- /** A hashtable to store all documentation comments
- * indexed by the tree nodes they refer to.
- * defined only if option flag keepDocComment is set.
- */
- Map<JCTree, String> docComments;
-
- /** Make an entry into docComments hashtable,
- * provided flag keepDocComments is set and given doc comment is non-null.
- * @param tree The tree to be used as index in the hashtable
- * @param dc The doc comment to associate with the tree, or null.
- */
- void attach(JCTree tree, String dc) {
- if (keepDocComments && dc != null) {
-// System.out.println("doc comment = ");System.out.println(dc);//DEBUG
- docComments.put(tree, dc);
- }
- }
-
-/* -------- source positions ------- */
-
- private int errorEndPos = -1;
-
- private void setErrorEndPos(int errPos) {
- if (errPos > errorEndPos)
- errorEndPos = errPos;
- }
-
- protected int getErrorEndPos() {
- return errorEndPos;
- }
-
- /**
- * Store ending position for a tree.
- * @param tree The tree.
- * @param endpos The ending position to associate with the tree.
- */
- protected void storeEnd(JCTree tree, int endpos) {}
-
- /**
- * Store ending position for a tree. The ending position should
- * be the ending position of the current token.
- * @param t The tree.
- */
- protected <T extends JCTree> T to(T t) { return t; }
-
- /**
- * Store ending position for a tree. The ending position should
- * be greater of the ending position of the previous token and errorEndPos.
- * @param t The tree.
- */
- protected <T extends JCTree> T toP(T t) { return t; }
-
- /** Get the start position for a tree node. The start position is
- * defined to be the position of the first character of the first
- * token of the node's source text.
- * @param tree The tree node
- */
- public int getStartPos(JCTree tree) {
- return TreeInfo.getStartPos(tree);
- }
-
- /**
- * Get the end position for a tree node. The end position is
- * defined to be the position of the last character of the last
- * token of the node's source text. Returns Position.NOPOS if end
- * positions are not generated or the position is otherwise not
- * found.
- * @param tree The tree node
- */
- public int getEndPos(JCTree tree) {
- return Position.NOPOS;
- }
-
-
-
-/* ---------- parsing -------------- */
-
- /**
- * Ident = IDENTIFIER
- */
- Name ident() {
- if (S.token() == IDENTIFIER) {
- Name name = S.name();
- S.nextToken();
- return name;
- } else if (S.token() == ASSERT) {
- if (allowAsserts) {
- log.error(S.pos(), "assert.as.identifier");
- S.nextToken();
- return names.error;
- } else {
- log.warning(S.pos(), "assert.as.identifier");
- Name name = S.name();
- S.nextToken();
- return name;
- }
- } else if (S.token() == ENUM) {
- if (allowEnums) {
- log.error(S.pos(), "enum.as.identifier");
- S.nextToken();
- return names.error;
- } else {
- log.warning(S.pos(), "enum.as.identifier");
- Name name = S.name();
- S.nextToken();
- return name;
- }
- } else {
- accept(IDENTIFIER);
- return names.error;
- }
-}
-
- /**
- * Qualident = Ident { DOT Ident }
- */
- public JCExpression qualident() {
- JCExpression t = toP(F.at(S.pos()).Ident(ident()));
- while (S.token() == DOT) {
- int pos = S.pos();
- S.nextToken();
- t = toP(F.at(pos).Select(t, ident()));
- }
- return t;
- }
-
- /**
- * Literal =
- * INTLITERAL
- * | LONGLITERAL
- * | FLOATLITERAL
- * | DOUBLELITERAL
- * | CHARLITERAL
- * | STRINGLITERAL
- * | TRUE
- * | FALSE
- * | NULL
- */
- JCExpression literal(Name prefix) {
- int pos = S.pos();
- JCExpression t = errorTree;
- switch (S.token()) {
- case INTLITERAL:
- try {
- t = F.at(pos).Literal(
- TypeTags.INT,
- Convert.string2int(strval(prefix), S.radix()));
- } catch (NumberFormatException ex) {
- log.error(S.pos(), "int.number.too.large", strval(prefix));
- }
- break;
- case LONGLITERAL:
- try {
- t = F.at(pos).Literal(
- TypeTags.LONG,
- new Long(Convert.string2long(strval(prefix), S.radix())));
- } catch (NumberFormatException ex) {
- log.error(S.pos(), "int.number.too.large", strval(prefix));
- }
- break;
- case FLOATLITERAL: {
- String proper = (S.radix() == 16 ? ("0x"+ S.stringVal()) : S.stringVal());
- Float n;
- try {
- n = Float.valueOf(proper);
- } catch (NumberFormatException ex) {
- // error already repoted in scanner
- n = Float.NaN;
- }
- if (n.floatValue() == 0.0f && !isZero(proper))
- log.error(S.pos(), "fp.number.too.small");
- else if (n.floatValue() == Float.POSITIVE_INFINITY)
- log.error(S.pos(), "fp.number.too.large");
- else
- t = F.at(pos).Literal(TypeTags.FLOAT, n);
- break;
- }
- case DOUBLELITERAL: {
- String proper = (S.radix() == 16 ? ("0x"+ S.stringVal()) : S.stringVal());
- Double n;
- try {
- n = Double.valueOf(proper);
- } catch (NumberFormatException ex) {
- // error already reported in scanner
- n = Double.NaN;
- }
- if (n.doubleValue() == 0.0d && !isZero(proper))
- log.error(S.pos(), "fp.number.too.small");
- else if (n.doubleValue() == Double.POSITIVE_INFINITY)
- log.error(S.pos(), "fp.number.too.large");
- else
- t = F.at(pos).Literal(TypeTags.DOUBLE, n);
- break;
- }
- case CHARLITERAL:
- t = F.at(pos).Literal(
- TypeTags.CHAR,
- S.stringVal().charAt(0) + 0);
- break;
- case STRINGLITERAL:
- t = F.at(pos).Literal(
- TypeTags.CLASS,
- S.stringVal());
- break;
- case TRUE: case FALSE:
- t = F.at(pos).Literal(
- TypeTags.BOOLEAN,
- (S.token() == TRUE ? 1 : 0));
- break;
- case NULL:
- t = F.at(pos).Literal(
- TypeTags.BOT,
- null);
- break;
- default:
- assert false;
- }
- if (t == errorTree)
- t = F.at(pos).Erroneous();
- storeEnd(t, S.endPos());
- S.nextToken();
- return t;
- }
-//where
- boolean isZero(String s) {
- char[] cs = s.toCharArray();
- int base = ((Character.toLowerCase(s.charAt(1)) == 'x') ? 16 : 10);
- int i = ((base==16) ? 2 : 0);
- while (i < cs.length && (cs[i] == '0' || cs[i] == '.')) i++;
- return !(i < cs.length && (Character.digit(cs[i], base) > 0));
- }
-
- String strval(Name prefix) {
- String s = S.stringVal();
- return (prefix.len == 0) ? s : prefix + s;
- }
-
- /** terms can be either expressions or types.
- */
- public JCExpression expression() {
- return term(EXPR);
- }
-
- public JCExpression type() {
- return term(TYPE);
- }
-
- JCExpression term(int newmode) {
- int prevmode = mode;
- mode = newmode;
- JCExpression t = term();
- lastmode = mode;
- mode = prevmode;
- return t;
- }
+ JCCompilationUnit parseCompilationUnit();
/**
- * Expression = Expression1 [ExpressionRest]
- * ExpressionRest = [AssignmentOperator Expression1]
- * AssignmentOperator = "=" | "+=" | "-=" | "*=" | "/=" |
- * "&=" | "|=" | "^=" |
- * "%=" | "<<=" | ">>=" | ">>>="
- * Type = Type1
- * TypeNoParams = TypeNoParams1
- * StatementExpression = Expression
- * ConstantExpression = Expression
- */
- JCExpression term() {
- JCExpression t = term1();
- if ((mode & EXPR) != 0 &&
- S.token() == EQ || PLUSEQ.compareTo(S.token()) <= 0 && S.token().compareTo(GTGTGTEQ) <= 0)
- return termRest(t);
- else
- return t;
- }
-
- JCExpression termRest(JCExpression t) {
- switch (S.token()) {
- case EQ: {
- int pos = S.pos();
- S.nextToken();
- mode = EXPR;
- JCExpression t1 = term();
- return toP(F.at(pos).Assign(t, t1));
- }
- case PLUSEQ:
- case SUBEQ:
- case STAREQ:
- case SLASHEQ:
- case PERCENTEQ:
- case AMPEQ:
- case BAREQ:
- case CARETEQ:
- case LTLTEQ:
- case GTGTEQ:
- case GTGTGTEQ:
- int pos = S.pos();
- Token token = S.token();
- S.nextToken();
- mode = EXPR;
- JCExpression t1 = term();
- return F.at(pos).Assignop(optag(token), t, t1);
- default:
- return t;
- }
- }
-
- /** Expression1 = Expression2 [Expression1Rest]
- * Type1 = Type2
- * TypeNoParams1 = TypeNoParams2
- */
- JCExpression term1() {
- JCExpression t = term2();
- if ((mode & EXPR) != 0 && S.token() == QUES) {
- mode = EXPR;
- return term1Rest(t);
- } else {
- return t;
- }
- }
-
- /** Expression1Rest = ["?" Expression ":" Expression1]
- */
- JCExpression term1Rest(JCExpression t) {
- if (S.token() == QUES) {
- int pos = S.pos();
- S.nextToken();
- JCExpression t1 = term();
- accept(COLON);
- JCExpression t2 = term1();
- return F.at(pos).Conditional(t, t1, t2);
- } else {
- return t;
- }
- }
-
- /** Expression2 = Expression3 [Expression2Rest]
- * Type2 = Type3
- * TypeNoParams2 = TypeNoParams3
- */
- JCExpression term2() {
- JCExpression t = term3();
- if ((mode & EXPR) != 0 && prec(S.token()) >= TreeInfo.orPrec) {
- mode = EXPR;
- return term2Rest(t, TreeInfo.orPrec);
- } else {
- return t;
- }
- }
-
- /* Expression2Rest = {infixop Expression3}
- * | Expression3 instanceof Type
- * infixop = "||"
- * | "&&"
- * | "|"
- * | "^"
- * | "&"
- * | "==" | "!="
- * | "<" | ">" | "<=" | ">="
- * | "<<" | ">>" | ">>>"
- * | "+" | "-"
- * | "*" | "/" | "%"
- */
- JCExpression term2Rest(JCExpression t, int minprec) {
- List<JCExpression[]> savedOd = odStackSupply.elems;
- JCExpression[] odStack = newOdStack();
- List<Token[]> savedOp = opStackSupply.elems;
- Token[] opStack = newOpStack();
- // optimization, was odStack = new Tree[...]; opStack = new Tree[...];
- int top = 0;
- odStack[0] = t;
- int startPos = S.pos();
- Token topOp = ERROR;
- while (prec(S.token()) >= minprec) {
- opStack[top] = topOp;
- top++;
- topOp = S.token();
- int pos = S.pos();
- S.nextToken();
- odStack[top] = topOp == INSTANCEOF ? type() : term3();
- while (top > 0 && prec(topOp) >= prec(S.token())) {
- odStack[top-1] = makeOp(pos, topOp, odStack[top-1],
- odStack[top]);
- top--;
- topOp = opStack[top];
- }
- }
- assert top == 0;
- t = odStack[0];
-
- if (t.getTag() == JCTree.PLUS) {
- StringBuffer buf = foldStrings(t);
- if (buf != null) {
- t = toP(F.at(startPos).Literal(TypeTags.CLASS, buf.toString()));
- }
- }
-
- odStackSupply.elems = savedOd; // optimization
- opStackSupply.elems = savedOp; // optimization
- return t;
- }
-//where
- /** Construct a binary or type test node.
- */
- private JCExpression makeOp(int pos,
- Token topOp,
- JCExpression od1,
- JCExpression od2)
- {
- if (topOp == INSTANCEOF) {
- return F.at(pos).TypeTest(od1, od2);
- } else {
- return F.at(pos).Binary(optag(topOp), od1, od2);
- }
- }
- /** If tree is a concatenation of string literals, replace it
- * by a single literal representing the concatenated string.
- */
- protected StringBuffer foldStrings(JCTree tree) {
- List<String> buf = List.nil();
- while (true) {
- if (tree.getTag() == JCTree.LITERAL) {
- JCLiteral lit = (JCLiteral) tree;
- if (lit.typetag == TypeTags.CLASS) {
- StringBuffer sbuf =
- new StringBuffer((String)lit.value);
- while (buf.nonEmpty()) {
- sbuf.append(buf.head);
- buf = buf.tail;
- }
- return sbuf;
- }
- } else if (tree.getTag() == JCTree.PLUS) {
- JCBinary op = (JCBinary)tree;
- if (op.rhs.getTag() == JCTree.LITERAL) {
- JCLiteral lit = (JCLiteral) op.rhs;
- if (lit.typetag == TypeTags.CLASS) {
- buf = buf.prepend((String) lit.value);
- tree = op.lhs;
- continue;
- }
- }
- }
- return null;
- }
- }
-
- /** optimization: To save allocating a new operand/operator stack
- * for every binary operation, we use supplys.
- */
- ListBuffer<JCExpression[]> odStackSupply = new ListBuffer<JCExpression[]>();
- ListBuffer<Token[]> opStackSupply = new ListBuffer<Token[]>();
-
- private JCExpression[] newOdStack() {
- if (odStackSupply.elems == odStackSupply.last)
- odStackSupply.append(new JCExpression[infixPrecedenceLevels + 1]);
- JCExpression[] odStack = odStackSupply.elems.head;
- odStackSupply.elems = odStackSupply.elems.tail;
- return odStack;
- }
-
- private Token[] newOpStack() {
- if (opStackSupply.elems == opStackSupply.last)
- opStackSupply.append(new Token[infixPrecedenceLevels + 1]);
- Token[] opStack = opStackSupply.elems.head;
- opStackSupply.elems = opStackSupply.elems.tail;
- return opStack;
- }
-
- /** Expression3 = PrefixOp Expression3
- * | "(" Expr | TypeNoParams ")" Expression3
- * | Primary {Selector} {PostfixOp}
- * Primary = "(" Expression ")"
- * | Literal
- * | [TypeArguments] THIS [Arguments]
- * | [TypeArguments] SUPER SuperSuffix
- * | NEW [TypeArguments] Creator
- * | Ident { "." Ident }
- * [ "[" ( "]" BracketsOpt "." CLASS | Expression "]" )
- * | Arguments
- * | "." ( CLASS | THIS | [TypeArguments] SUPER Arguments | NEW [TypeArguments] InnerCreator )
- * ]
- * | BasicType BracketsOpt "." CLASS
- * PrefixOp = "++" | "--" | "!" | "~" | "+" | "-"
- * PostfixOp = "++" | "--"
- * Type3 = Ident { "." Ident } [TypeArguments] {TypeSelector} BracketsOpt
- * | BasicType
- * TypeNoParams3 = Ident { "." Ident } BracketsOpt
- * Selector = "." [TypeArguments] Ident [Arguments]
- * | "." THIS
- * | "." [TypeArguments] SUPER SuperSuffix
- * | "." NEW [TypeArguments] InnerCreator
- * | "[" Expression "]"
- * TypeSelector = "." Ident [TypeArguments]
- * SuperSuffix = Arguments | "." Ident [Arguments]
+ * Parse an expression.
+ * @return an expression
*/
- protected JCExpression term3() {
- int pos = S.pos();
- JCExpression t;
- List<JCExpression> typeArgs = typeArgumentsOpt(EXPR);
- switch (S.token()) {
- case QUES:
- if ((mode & TYPE) != 0 && (mode & (TYPEARG|NOPARAMS)) == TYPEARG) {
- mode = TYPE;
- return typeArgument();
- } else
- return illegal();
- case PLUSPLUS: case SUBSUB: case BANG: case TILDE: case PLUS: case SUB:
- if (typeArgs == null && (mode & EXPR) != 0) {
- Token token = S.token();
- S.nextToken();
- mode = EXPR;
- if (token == SUB &&
- (S.token() == INTLITERAL || S.token() == LONGLITERAL) &&
- S.radix() == 10) {
- mode = EXPR;
- t = literal(names.hyphen);
- } else {
- t = term3();
- return F.at(pos).Unary(unoptag(token), t);
- }
- } else return illegal();
- break;
- case LPAREN:
- if (typeArgs == null && (mode & EXPR) != 0) {
- S.nextToken();
- mode = EXPR | TYPE | NOPARAMS;
- t = term3();
- if ((mode & TYPE) != 0 && S.token() == LT) {
- // Could be a cast to a parameterized type
- int op = JCTree.LT;
- int pos1 = S.pos();
- S.nextToken();
- mode &= (EXPR | TYPE);
- mode |= TYPEARG;
- JCExpression t1 = term3();
- if ((mode & TYPE) != 0 &&
- (S.token() == COMMA || S.token() == GT)) {
- mode = TYPE;
- ListBuffer<JCExpression> args = new ListBuffer<JCExpression>();
- args.append(t1);
- while (S.token() == COMMA) {
- S.nextToken();
- args.append(typeArgument());
- }
- accept(GT);
- t = F.at(pos1).TypeApply(t, args.toList());
- checkGenerics();
- t = bracketsOpt(toP(t));
- } else if ((mode & EXPR) != 0) {
- mode = EXPR;
- t = F.at(pos1).Binary(op, t, term2Rest(t1, TreeInfo.shiftPrec));
- t = termRest(term1Rest(term2Rest(t, TreeInfo.orPrec)));
- } else {
- accept(GT);
- }
- } else {
- t = termRest(term1Rest(term2Rest(t, TreeInfo.orPrec)));
- }
- accept(RPAREN);
- lastmode = mode;
- mode = EXPR;
- if ((lastmode & EXPR) == 0) {
- JCExpression t1 = term3();
- return F.at(pos).TypeCast(t, t1);
- } else if ((lastmode & TYPE) != 0) {
- switch (S.token()) {
- /*case PLUSPLUS: case SUBSUB: */
- case BANG: case TILDE:
- case LPAREN: case THIS: case SUPER:
- case INTLITERAL: case LONGLITERAL: case FLOATLITERAL:
- case DOUBLELITERAL: case CHARLITERAL: case STRINGLITERAL:
- case TRUE: case FALSE: case NULL:
- case NEW: case IDENTIFIER: case ASSERT: case ENUM:
- case BYTE: case SHORT: case CHAR: case INT:
- case LONG: case FLOAT: case DOUBLE: case BOOLEAN: case VOID:
- JCExpression t1 = term3();
- return F.at(pos).TypeCast(t, t1);
- }
- }
- } else return illegal();
- t = toP(F.at(pos).Parens(t));
- break;
- case THIS:
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- t = to(F.at(pos).Ident(names._this));
- S.nextToken();
- if (typeArgs == null)
- t = argumentsOpt(null, t);
- else
- t = arguments(typeArgs, t);
- typeArgs = null;
- } else return illegal();
- break;
- case SUPER:
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- t = to(superSuffix(typeArgs, F.at(pos).Ident(names._super)));
- typeArgs = null;
- } else return illegal();
- break;
- case INTLITERAL: case LONGLITERAL: case FLOATLITERAL: case DOUBLELITERAL:
- case CHARLITERAL: case STRINGLITERAL:
- case TRUE: case FALSE: case NULL:
- if (typeArgs == null && (mode & EXPR) != 0) {
- mode = EXPR;
- t = literal(names.empty);
- } else return illegal();
- break;
- case NEW:
- if (typeArgs != null) return illegal();
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- S.nextToken();
- if (S.token() == LT) typeArgs = typeArguments();
- t = creator(pos, typeArgs);
- typeArgs = null;
- } else return illegal();
- break;
- case IDENTIFIER: case ASSERT: case ENUM:
- if (typeArgs != null) return illegal();
- t = toP(F.at(S.pos()).Ident(ident()));
- loop: while (true) {
- pos = S.pos();
- switch (S.token()) {
- case LBRACKET:
- S.nextToken();
- if (S.token() == RBRACKET) {
- S.nextToken();
- t = bracketsOpt(t);
- t = toP(F.at(pos).TypeArray(t));
- t = bracketsSuffix(t);
- } else {
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- JCExpression t1 = term();
- t = to(F.at(pos).Indexed(t, t1));
- }
- accept(RBRACKET);
- }
- break loop;
- case LPAREN:
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- t = arguments(typeArgs, t);
- typeArgs = null;
- }
- break loop;
- case DOT:
- S.nextToken();
- int oldmode = mode;
- mode &= ~NOPARAMS;
- typeArgs = typeArgumentsOpt(EXPR);
- mode = oldmode;
- if ((mode & EXPR) != 0) {
- switch (S.token()) {
- case CLASS:
- if (typeArgs != null) return illegal();
- mode = EXPR;
- t = to(F.at(pos).Select(t, names._class));
- S.nextToken();
- break loop;
- case THIS:
- if (typeArgs != null) return illegal();
- mode = EXPR;
- t = to(F.at(pos).Select(t, names._this));
- S.nextToken();
- break loop;
- case SUPER:
- mode = EXPR;
- t = to(F.at(pos).Select(t, names._super));
- t = superSuffix(typeArgs, t);
- typeArgs = null;
- break loop;
- case NEW:
- if (typeArgs != null) return illegal();
- mode = EXPR;
- int pos1 = S.pos();
- S.nextToken();
- if (S.token() == LT) typeArgs = typeArguments();
- t = innerCreator(pos1, typeArgs, t);
- typeArgs = null;
- break loop;
- }
- }
- // typeArgs saved for next loop iteration.
- t = toP(F.at(pos).Select(t, ident()));
- break;
- default:
- break loop;
- }
- }
- if (typeArgs != null) illegal();
- t = typeArgumentsOpt(t);
- break;
- case BYTE: case SHORT: case CHAR: case INT: case LONG: case FLOAT:
- case DOUBLE: case BOOLEAN:
- if (typeArgs != null) illegal();
- t = bracketsSuffix(bracketsOpt(basicType()));
- break;
- case VOID:
- if (typeArgs != null) illegal();
- if ((mode & EXPR) != 0) {
- S.nextToken();
- if (S.token() == DOT) {
- JCPrimitiveTypeTree ti = toP(F.at(pos).TypeIdent(TypeTags.VOID));
- t = bracketsSuffix(ti);
- } else {
- return illegal(pos);
- }
- } else {
- return illegal();
- }
- break;
- default:
- return illegal();
- }
- if (typeArgs != null) illegal();
- while (true) {
- int pos1 = S.pos();
- if (S.token() == LBRACKET) {
- S.nextToken();
- if ((mode & TYPE) != 0) {
- int oldmode = mode;
- mode = TYPE;
- if (S.token() == RBRACKET) {
- S.nextToken();
- t = bracketsOpt(t);
- t = toP(F.at(pos1).TypeArray(t));
- return t;
- }
- mode = oldmode;
- }
- if ((mode & EXPR) != 0) {
- mode = EXPR;
- JCExpression t1 = term();
- t = to(F.at(pos1).Indexed(t, t1));
- }
- accept(RBRACKET);
- } else if (S.token() == DOT) {
- S.nextToken();
- typeArgs = typeArgumentsOpt(EXPR);
- if (S.token() == SUPER && (mode & EXPR) != 0) {
- mode = EXPR;
- t = to(F.at(pos1).Select(t, names._super));
- S.nextToken();
- t = arguments(typeArgs, t);
- typeArgs = null;
- } else if (S.token() == NEW && (mode & EXPR) != 0) {
- if (typeArgs != null) return illegal();
- mode = EXPR;
- int pos2 = S.pos();
- S.nextToken();
- if (S.token() == LT) typeArgs = typeArguments();
- t = innerCreator(pos2, typeArgs, t);
- typeArgs = null;
- } else {
- t = toP(F.at(pos1).Select(t, ident()));
- t = argumentsOpt(typeArgs, typeArgumentsOpt(t));
- typeArgs = null;
- }
- } else {
- break;
- }
- }
- while ((S.token() == PLUSPLUS || S.token() == SUBSUB) && (mode & EXPR) != 0) {
- mode = EXPR;
- t = to(F.at(S.pos()).Unary(
- S.token() == PLUSPLUS ? JCTree.POSTINC : JCTree.POSTDEC, t));
- S.nextToken();
- }
- return toP(t);
- }
-
- /** SuperSuffix = Arguments | "." [TypeArguments] Ident [Arguments]
- */
- JCExpression superSuffix(List<JCExpression> typeArgs, JCExpression t) {
- S.nextToken();
- if (S.token() == LPAREN || typeArgs != null) {
- t = arguments(typeArgs, t);
- } else {
- int pos = S.pos();
- accept(DOT);
- typeArgs = (S.token() == LT) ? typeArguments() : null;
- t = toP(F.at(pos).Select(t, ident()));
- t = argumentsOpt(typeArgs, t);
- }
- return t;
- }
-
- /** BasicType = BYTE | SHORT | CHAR | INT | LONG | FLOAT | DOUBLE | BOOLEAN
- */
- JCPrimitiveTypeTree basicType() {
- JCPrimitiveTypeTree t = to(F.at(S.pos()).TypeIdent(typetag(S.token())));
- S.nextToken();
- return t;
- }
-
- /** ArgumentsOpt = [ Arguments ]
- */
- JCExpression argumentsOpt(List<JCExpression> typeArgs, JCExpression t) {
- if ((mode & EXPR) != 0 && S.token() == LPAREN || typeArgs != null) {
- mode = EXPR;
- return arguments(typeArgs, t);
- } else {
- return t;
- }
- }
-
- /** Arguments = "(" [Expression { COMMA Expression }] ")"
- */
- List<JCExpression> arguments() {
- ListBuffer<JCExpression> args = lb();
- if (S.token() == LPAREN) {
- S.nextToken();
- if (S.token() != RPAREN) {
- args.append(expression());
- while (S.token() == COMMA) {
- S.nextToken();
- args.append(expression());
- }
- }
- accept(RPAREN);
- } else {
- syntaxError(S.pos(), "expected", LPAREN);
- }
- return args.toList();
- }
-
- JCMethodInvocation arguments(List<JCExpression> typeArgs, JCExpression t) {
- int pos = S.pos();
- List<JCExpression> args = arguments();
- return toP(F.at(pos).Apply(typeArgs, t, args));
- }
-
- /** TypeArgumentsOpt = [ TypeArguments ]
- */
- JCExpression typeArgumentsOpt(JCExpression t) {
- if (S.token() == LT &&
- (mode & TYPE) != 0 &&
- (mode & NOPARAMS) == 0) {
- mode = TYPE;
- checkGenerics();
- return typeArguments(t);
- } else {
- return t;
- }
- }
- List<JCExpression> typeArgumentsOpt() {
- return typeArgumentsOpt(TYPE);
- }
-
- List<JCExpression> typeArgumentsOpt(int useMode) {
- if (S.token() == LT) {
- checkGenerics();
- if ((mode & useMode) == 0 ||
- (mode & NOPARAMS) != 0) {
- illegal();
- }
- mode = useMode;
- return typeArguments();
- }
- return null;
- }
+ JCExpression parseExpression();
- /** TypeArguments = "<" TypeArgument {"," TypeArgument} ">"
- */
- List<JCExpression> typeArguments() {
- ListBuffer<JCExpression> args = lb();
- if (S.token() == LT) {
- S.nextToken();
- args.append(((mode & EXPR) == 0) ? typeArgument() : type());
- while (S.token() == COMMA) {
- S.nextToken();
- args.append(((mode & EXPR) == 0) ? typeArgument() : type());
- }
- switch (S.token()) {
- case GTGTGTEQ:
- S.token(GTGTEQ);
- break;
- case GTGTEQ:
- S.token(GTEQ);
- break;
- case GTEQ:
- S.token(EQ);
- break;
- case GTGTGT:
- S.token(GTGT);
- break;
- case GTGT:
- S.token(GT);
- break;
- default:
- accept(GT);
- break;
- }
- } else {
- syntaxError(S.pos(), "expected", LT);
- }
- return args.toList();
- }
-
- /** TypeArgument = Type
- * | "?"
- * | "?" EXTENDS Type {"&" Type}
- * | "?" SUPER Type
- */
- JCExpression typeArgument() {
- if (S.token() != QUES) return type();
- int pos = S.pos();
- S.nextToken();
- if (S.token() == EXTENDS) {
- TypeBoundKind t = to(F.at(S.pos()).TypeBoundKind(BoundKind.EXTENDS));
- S.nextToken();
- return F.at(pos).Wildcard(t, type());
- } else if (S.token() == SUPER) {
- TypeBoundKind t = to(F.at(S.pos()).TypeBoundKind(BoundKind.SUPER));
- S.nextToken();
- return F.at(pos).Wildcard(t, type());
- } else if (S.token() == IDENTIFIER) {
- //error recovery
- reportSyntaxError(S.prevEndPos(), "expected3",
- GT, EXTENDS, SUPER);
- TypeBoundKind t = F.at(Position.NOPOS).TypeBoundKind(BoundKind.UNBOUND);
- JCExpression wc = toP(F.at(pos).Wildcard(t, null));
- JCIdent id = toP(F.at(S.pos()).Ident(ident()));
- return F.at(pos).Erroneous(List.<JCTree>of(wc, id));
- } else {
- TypeBoundKind t = F.at(Position.NOPOS).TypeBoundKind(BoundKind.UNBOUND);
- return toP(F.at(pos).Wildcard(t, null));
- }
- }
-
- JCTypeApply typeArguments(JCExpression t) {
- int pos = S.pos();
- List<JCExpression> args = typeArguments();
- return toP(F.at(pos).TypeApply(t, args));
- }
-
- /** BracketsOpt = {"[" "]"}
- */
- private JCExpression bracketsOpt(JCExpression t) {
- if (S.token() == LBRACKET) {
- int pos = S.pos();
- S.nextToken();
- t = bracketsOptCont(t, pos);
- F.at(pos);
- }
- return t;
- }
-
- private JCArrayTypeTree bracketsOptCont(JCExpression t, int pos) {
- accept(RBRACKET);
- t = bracketsOpt(t);
- return toP(F.at(pos).TypeArray(t));
- }
-
- /** BracketsSuffixExpr = "." CLASS
- * BracketsSuffixType =
- */
- JCExpression bracketsSuffix(JCExpression t) {
- if ((mode & EXPR) != 0 && S.token() == DOT) {
- mode = EXPR;
- int pos = S.pos();
- S.nextToken();
- accept(CLASS);
- if (S.pos() == errorEndPos) {
- // error recovery
- Name name = null;
- if (S.token() == IDENTIFIER) {
- name = S.name();
- S.nextToken();
- } else {
- name = names.error;
- }
- t = F.at(pos).Erroneous(List.<JCTree>of(toP(F.at(pos).Select(t, name))));
- } else {
- t = toP(F.at(pos).Select(t, names._class));
- }
- } else if ((mode & TYPE) != 0) {
- mode = TYPE;
- } else {
- syntaxError(S.pos(), "dot.class.expected");
- }
- return t;
- }
-
- /** Creator = Qualident [TypeArguments] ( ArrayCreatorRest | ClassCreatorRest )
- */
- JCExpression creator(int newpos, List<JCExpression> typeArgs) {
- switch (S.token()) {
- case BYTE: case SHORT: case CHAR: case INT: case LONG: case FLOAT:
- case DOUBLE: case BOOLEAN:
- if (typeArgs == null)
- return arrayCreatorRest(newpos, basicType());
- break;
- default:
- }
- JCExpression t = qualident();
- int oldmode = mode;
- mode = TYPE;
- if (S.token() == LT) {
- checkGenerics();
- t = typeArguments(t);
- }
- while (S.token() == DOT) {
- int pos = S.pos();
- S.nextToken();
- t = toP(F.at(pos).Select(t, ident()));
- if (S.token() == LT) {
- checkGenerics();
- t = typeArguments(t);
- }
- }
- mode = oldmode;
- if (S.token() == LBRACKET) {
- JCExpression e = arrayCreatorRest(newpos, t);
- if (typeArgs != null) {
- int pos = newpos;
- if (!typeArgs.isEmpty() && typeArgs.head.pos != Position.NOPOS) {
- // note: this should always happen but we should
- // not rely on this as the parser is continuously
- // modified to improve error recovery.
- pos = typeArgs.head.pos;
- }
- setErrorEndPos(S.prevEndPos());
- reportSyntaxError(pos, "cannot.create.array.with.type.arguments");
- return toP(F.at(newpos).Erroneous(typeArgs.prepend(e)));
- }
- return e;
- } else if (S.token() == LPAREN) {
- return classCreatorRest(newpos, null, typeArgs, t);
- } else {
- reportSyntaxError(S.pos(), "expected2",
- LPAREN, LBRACKET);
- t = toP(F.at(newpos).NewClass(null, typeArgs, t, List.<JCExpression>nil(), null));
- return toP(F.at(newpos).Erroneous(List.<JCTree>of(t)));
- }
- }
-
- /** InnerCreator = Ident [TypeArguments] ClassCreatorRest
- */
- JCExpression innerCreator(int newpos, List<JCExpression> typeArgs, JCExpression encl) {
- JCExpression t = toP(F.at(S.pos()).Ident(ident()));
- if (S.token() == LT) {
- checkGenerics();
- t = typeArguments(t);
- }
- return classCreatorRest(newpos, encl, typeArgs, t);
- }
-
- /** ArrayCreatorRest = "[" ( "]" BracketsOpt ArrayInitializer
- * | Expression "]" {"[" Expression "]"} BracketsOpt )
- */
- JCExpression arrayCreatorRest(int newpos, JCExpression elemtype) {
- accept(LBRACKET);
- if (S.token() == RBRACKET) {
- accept(RBRACKET);
- elemtype = bracketsOpt(elemtype);
- if (S.token() == LBRACE) {
- return arrayInitializer(newpos, elemtype);
- } else {
- return syntaxError(S.pos(), "array.dimension.missing");
- }
- } else {
- ListBuffer<JCExpression> dims = new ListBuffer<JCExpression>();
- dims.append(expression());
- accept(RBRACKET);
- while (S.token() == LBRACKET) {
- int pos = S.pos();
- S.nextToken();
- if (S.token() == RBRACKET) {
- elemtype = bracketsOptCont(elemtype, pos);
- } else {
- dims.append(expression());
- accept(RBRACKET);
- }
- }
- return toP(F.at(newpos).NewArray(elemtype, dims.toList(), null));
- }
- }
-
- /** ClassCreatorRest = Arguments [ClassBody]
- */
- JCExpression classCreatorRest(int newpos,
- JCExpression encl,
- List<JCExpression> typeArgs,
- JCExpression t)
- {
- List<JCExpression> args = arguments();
- JCClassDecl body = null;
- if (S.token() == LBRACE) {
- int pos = S.pos();
- List<JCTree> defs = classOrInterfaceBody(names.empty, false);
- JCModifiers mods = F.at(Position.NOPOS).Modifiers(0);
- body = toP(F.at(pos).AnonymousClassDef(mods, defs));
- }
- return toP(F.at(newpos).NewClass(encl, typeArgs, t, args, body));
- }
-
- /** ArrayInitializer = "{" [VariableInitializer {"," VariableInitializer}] [","] "}"
- */
- JCExpression arrayInitializer(int newpos, JCExpression t) {
- accept(LBRACE);
- ListBuffer<JCExpression> elems = new ListBuffer<JCExpression>();
- if (S.token() == COMMA) {
- S.nextToken();
- } else if (S.token() != RBRACE) {
- elems.append(variableInitializer());
- while (S.token() == COMMA) {
- S.nextToken();
- if (S.token() == RBRACE) break;
- elems.append(variableInitializer());
- }
- }
- accept(RBRACE);
- return toP(F.at(newpos).NewArray(t, List.<JCExpression>nil(), elems.toList()));
- }
-
- /** VariableInitializer = ArrayInitializer | Expression
- */
- public JCExpression variableInitializer() {
- return S.token() == LBRACE ? arrayInitializer(S.pos(), null) : expression();
- }
-
- /** ParExpression = "(" Expression ")"
- */
- JCExpression parExpression() {
- accept(LPAREN);
- JCExpression t = expression();
- accept(RPAREN);
- return t;
- }
-
- /** Block = "{" BlockStatements "}"
- */
- JCBlock block(int pos, long flags) {
- accept(LBRACE);
- List<JCStatement> stats = blockStatements();
- JCBlock t = F.at(pos).Block(flags, stats);
- while (S.token() == CASE || S.token() == DEFAULT) {
- syntaxError("orphaned", S.token());
- switchBlockStatementGroups();
- }
- // the Block node has a field "endpos" for first char of last token, which is
- // usually but not necessarily the last char of the last token.
- t.endpos = S.pos();
- accept(RBRACE);
- return toP(t);
- }
-
- public JCBlock block() {
- return block(S.pos(), 0);
- }
-
- /** BlockStatements = { BlockStatement }
- * BlockStatement = LocalVariableDeclarationStatement
- * | ClassOrInterfaceOrEnumDeclaration
- * | [Ident ":"] Statement
- * LocalVariableDeclarationStatement
- * = { FINAL | '@' Annotation } Type VariableDeclarators ";"
- */
- @SuppressWarnings("fallthrough")
- List<JCStatement> blockStatements() {
-//todo: skip to anchor on error(?)
- int lastErrPos = -1;
- ListBuffer<JCStatement> stats = new ListBuffer<JCStatement>();
- while (true) {
- int pos = S.pos();
- switch (S.token()) {
- case RBRACE: case CASE: case DEFAULT: case EOF:
- return stats.toList();
- case LBRACE: case IF: case FOR: case WHILE: case DO: case TRY:
- case SWITCH: case SYNCHRONIZED: case RETURN: case THROW: case BREAK:
- case CONTINUE: case SEMI: case ELSE: case FINALLY: case CATCH:
- stats.append(statement());
- break;
- case MONKEYS_AT:
- case FINAL: {
- String dc = S.docComment();
- JCModifiers mods = modifiersOpt();
- if (S.token() == INTERFACE ||
- S.token() == CLASS ||
- allowEnums && S.token() == ENUM) {
- stats.append(classOrInterfaceOrEnumDeclaration(mods, dc));
- } else {
- JCExpression t = type();
- stats.appendList(variableDeclarators(mods, t,
- new ListBuffer<JCStatement>()));
- // A "LocalVariableDeclarationStatement" subsumes the terminating semicolon
- storeEnd(stats.elems.last(), S.endPos());
- accept(SEMI);
- }
- break;
- }
- case ABSTRACT: case STRICTFP: {
- String dc = S.docComment();
- JCModifiers mods = modifiersOpt();
- stats.append(classOrInterfaceOrEnumDeclaration(mods, dc));
- break;
- }
- case INTERFACE:
- case CLASS:
- stats.append(classOrInterfaceOrEnumDeclaration(modifiersOpt(),
- S.docComment()));
- break;
- case ENUM:
- case ASSERT:
- if (allowEnums && S.token() == ENUM) {
- log.error(S.pos(), "local.enum");
- stats.
- append(classOrInterfaceOrEnumDeclaration(modifiersOpt(),
- S.docComment()));
- break;
- } else if (allowAsserts && S.token() == ASSERT) {
- stats.append(statement());
- break;
- }
- /* fall through to default */
- default:
- Name name = S.name();
- JCExpression t = term(EXPR | TYPE);
- if (S.token() == COLON && t.getTag() == JCTree.IDENT) {
- S.nextToken();
- JCStatement stat = statement();
- stats.append(F.at(pos).Labelled(name, stat));
- } else if ((lastmode & TYPE) != 0 &&
- (S.token() == IDENTIFIER ||
- S.token() == ASSERT ||
- S.token() == ENUM)) {
- pos = S.pos();
- JCModifiers mods = F.at(Position.NOPOS).Modifiers(0);
- F.at(pos);
- stats.appendList(variableDeclarators(mods, t,
- new ListBuffer<JCStatement>()));
- // A "LocalVariableDeclarationStatement" subsumes the terminating semicolon
- storeEnd(stats.elems.last(), S.endPos());
- accept(SEMI);
- } else {
- // This Exec is an "ExpressionStatement"; it subsumes the terminating semicolon
- stats.append(to(F.at(pos).Exec(checkExprStat(t))));
- accept(SEMI);
- }
- }
-
- // error recovery
- if (S.pos() == lastErrPos)
- return stats.toList();
- if (S.pos() <= errorEndPos) {
- skip(false, true, true, true);
- lastErrPos = S.pos();
- }
-
- // ensure no dangling /** @deprecated */ active
- S.resetDeprecatedFlag();
- }
- }
-
- /** Statement =
- * Block
- * | IF ParExpression Statement [ELSE Statement]
- * | FOR "(" ForInitOpt ";" [Expression] ";" ForUpdateOpt ")" Statement
- * | FOR "(" FormalParameter : Expression ")" Statement
- * | WHILE ParExpression Statement
- * | DO Statement WHILE ParExpression ";"
- * | TRY Block ( Catches | [Catches] FinallyPart )
- * | SWITCH ParExpression "{" SwitchBlockStatementGroups "}"
- * | SYNCHRONIZED ParExpression Block
- * | RETURN [Expression] ";"
- * | THROW Expression ";"
- * | BREAK [Ident] ";"
- * | CONTINUE [Ident] ";"
- * | ASSERT Expression [ ":" Expression ] ";"
- * | ";"
- * | ExpressionStatement
- * | Ident ":" Statement
+ /**
+ * Parse a statement.
+ * @return an expression
*/
- @SuppressWarnings("fallthrough")
- public JCStatement statement() {
- int pos = S.pos();
- switch (S.token()) {
- case LBRACE:
- return block();
- case IF: {
- S.nextToken();
- JCExpression cond = parExpression();
- JCStatement thenpart = statement();
- JCStatement elsepart = null;
- if (S.token() == ELSE) {
- S.nextToken();
- elsepart = statement();
- }
- return F.at(pos).If(cond, thenpart, elsepart);
- }
- case FOR: {
- S.nextToken();
- accept(LPAREN);
- List<JCStatement> inits = S.token() == SEMI ? List.<JCStatement>nil() : forInit();
- if (inits.length() == 1 &&
- inits.head.getTag() == JCTree.VARDEF &&
- ((JCVariableDecl) inits.head).init == null &&
- S.token() == COLON) {
- checkForeach();
- JCVariableDecl var = (JCVariableDecl)inits.head;
- accept(COLON);
- JCExpression expr = expression();
- accept(RPAREN);
- JCStatement body = statement();
- return F.at(pos).ForeachLoop(var, expr, body);
- } else {
- accept(SEMI);
- JCExpression cond = S.token() == SEMI ? null : expression();
- accept(SEMI);
- List<JCExpressionStatement> steps = S.token() == RPAREN ? List.<JCExpressionStatement>nil() : forUpdate();
- accept(RPAREN);
- JCStatement body = statement();
- return F.at(pos).ForLoop(inits, cond, steps, body);
- }
- }
- case WHILE: {
- S.nextToken();
- JCExpression cond = parExpression();
- JCStatement body = statement();
- return F.at(pos).WhileLoop(cond, body);
- }
- case DO: {
- S.nextToken();
- JCStatement body = statement();
- accept(WHILE);
- JCExpression cond = parExpression();
- JCDoWhileLoop t = to(F.at(pos).DoLoop(body, cond));
- accept(SEMI);
- return t;
- }
- case TRY: {
- S.nextToken();
- JCBlock body = block();
- ListBuffer<JCCatch> catchers = new ListBuffer<JCCatch>();
- JCBlock finalizer = null;
- if (S.token() == CATCH || S.token() == FINALLY) {
- while (S.token() == CATCH) catchers.append(catchClause());
- if (S.token() == FINALLY) {
- S.nextToken();
- finalizer = block();
- }
- } else {
- log.error(pos, "try.without.catch.or.finally");
- }
- return F.at(pos).Try(body, catchers.toList(), finalizer);
- }
- case SWITCH: {
- S.nextToken();
- JCExpression selector = parExpression();
- accept(LBRACE);
- List<JCCase> cases = switchBlockStatementGroups();
- JCSwitch t = to(F.at(pos).Switch(selector, cases));
- accept(RBRACE);
- return t;
- }
- case SYNCHRONIZED: {
- S.nextToken();
- JCExpression lock = parExpression();
- JCBlock body = block();
- return F.at(pos).Synchronized(lock, body);
- }
- case RETURN: {
- S.nextToken();
- JCExpression result = S.token() == SEMI ? null : expression();
- JCReturn t = to(F.at(pos).Return(result));
- accept(SEMI);
- return t;
- }
- case THROW: {
- S.nextToken();
- JCExpression exc = expression();
- JCThrow t = to(F.at(pos).Throw(exc));
- accept(SEMI);
- return t;
- }
- case BREAK: {
- S.nextToken();
- Name label = (S.token() == IDENTIFIER || S.token() == ASSERT || S.token() == ENUM) ? ident() : null;
- JCBreak t = to(F.at(pos).Break(label));
- accept(SEMI);
- return t;
- }
- case CONTINUE: {
- S.nextToken();
- Name label = (S.token() == IDENTIFIER || S.token() == ASSERT || S.token() == ENUM) ? ident() : null;
- JCContinue t = to(F.at(pos).Continue(label));
- accept(SEMI);
- return t;
- }
- case SEMI:
- S.nextToken();
- return toP(F.at(pos).Skip());
- case ELSE:
- return toP(F.Exec(syntaxError("else.without.if")));
- case FINALLY:
- return toP(F.Exec(syntaxError("finally.without.try")));
- case CATCH:
- return toP(F.Exec(syntaxError("catch.without.try")));
- case ASSERT: {
- if (allowAsserts && S.token() == ASSERT) {
- S.nextToken();
- JCExpression assertion = expression();
- JCExpression message = null;
- if (S.token() == COLON) {
- S.nextToken();
- message = expression();
- }
- JCAssert t = to(F.at(pos).Assert(assertion, message));
- accept(SEMI);
- return t;
- }
- /* else fall through to default case */
- }
- case ENUM:
- default:
- Name name = S.name();
- JCExpression expr = expression();
- if (S.token() == COLON && expr.getTag() == JCTree.IDENT) {
- S.nextToken();
- JCStatement stat = statement();
- return F.at(pos).Labelled(name, stat);
- } else {
- // This Exec is an "ExpressionStatement"; it subsumes the terminating semicolon
- JCExpressionStatement stat = to(F.at(pos).Exec(checkExprStat(expr)));
- accept(SEMI);
- return stat;
- }
- }
- }
-
- /** CatchClause = CATCH "(" FormalParameter ")" Block
- */
- JCCatch catchClause() {
- int pos = S.pos();
- accept(CATCH);
- accept(LPAREN);
- JCVariableDecl formal =
- variableDeclaratorId(optFinal(Flags.PARAMETER),
- qualident());
- accept(RPAREN);
- JCBlock body = block();
- return F.at(pos).Catch(formal, body);
- }
-
- /** SwitchBlockStatementGroups = { SwitchBlockStatementGroup }
- * SwitchBlockStatementGroup = SwitchLabel BlockStatements
- * SwitchLabel = CASE ConstantExpression ":" | DEFAULT ":"
- */
- List<JCCase> switchBlockStatementGroups() {
- ListBuffer<JCCase> cases = new ListBuffer<JCCase>();
- while (true) {
- int pos = S.pos();
- switch (S.token()) {
- case CASE: {
- S.nextToken();
- JCExpression pat = expression();
- accept(COLON);
- List<JCStatement> stats = blockStatements();
- JCCase c = F.at(pos).Case(pat, stats);
- if (stats.isEmpty())
- storeEnd(c, S.prevEndPos());
- cases.append(c);
- break;
- }
- case DEFAULT: {
- S.nextToken();
- accept(COLON);
- List<JCStatement> stats = blockStatements();
- JCCase c = F.at(pos).Case(null, stats);
- if (stats.isEmpty())
- storeEnd(c, S.prevEndPos());
- cases.append(c);
- break;
- }
- case RBRACE: case EOF:
- return cases.toList();
- default:
- S.nextToken(); // to ensure progress
- syntaxError(pos, "expected3",
- CASE, DEFAULT, RBRACE);
- }
- }
- }
-
- /** MoreStatementExpressions = { COMMA StatementExpression }
- */
- <T extends ListBuffer<? super JCExpressionStatement>> T moreStatementExpressions(int pos,
- JCExpression first,
- T stats) {
- // This Exec is a "StatementExpression"; it subsumes no terminating token
- stats.append(toP(F.at(pos).Exec(checkExprStat(first))));
- while (S.token() == COMMA) {
- S.nextToken();
- pos = S.pos();
- JCExpression t = expression();
- // This Exec is a "StatementExpression"; it subsumes no terminating token
- stats.append(toP(F.at(pos).Exec(checkExprStat(t))));
- }
- return stats;
- }
-
- /** ForInit = StatementExpression MoreStatementExpressions
- * | { FINAL | '@' Annotation } Type VariableDeclarators
- */
- List<JCStatement> forInit() {
- ListBuffer<JCStatement> stats = lb();
- int pos = S.pos();
- if (S.token() == FINAL || S.token() == MONKEYS_AT) {
- return variableDeclarators(optFinal(0), type(), stats).toList();
- } else {
- JCExpression t = term(EXPR | TYPE);
- if ((lastmode & TYPE) != 0 &&
- (S.token() == IDENTIFIER || S.token() == ASSERT || S.token() == ENUM))
- return variableDeclarators(modifiersOpt(), t, stats).toList();
- else
- return moreStatementExpressions(pos, t, stats).toList();
- }
- }
-
- /** ForUpdate = StatementExpression MoreStatementExpressions
- */
- List<JCExpressionStatement> forUpdate() {
- return moreStatementExpressions(S.pos(),
- expression(),
- new ListBuffer<JCExpressionStatement>()).toList();
- }
-
- /** AnnotationsOpt = { '@' Annotation }
- */
- List<JCAnnotation> annotationsOpt() {
- if (S.token() != MONKEYS_AT) return List.nil(); // optimization
- ListBuffer<JCAnnotation> buf = new ListBuffer<JCAnnotation>();
- while (S.token() == MONKEYS_AT) {
- int pos = S.pos();
- S.nextToken();
- buf.append(annotation(pos));
- }
- return buf.toList();
- }
+ JCStatement parseStatement();
- /** ModifiersOpt = { Modifier }
- * Modifier = PUBLIC | PROTECTED | PRIVATE | STATIC | ABSTRACT | FINAL
- * | NATIVE | SYNCHRONIZED | TRANSIENT | VOLATILE | "@"
- * | "@" Annotation
- */
- JCModifiers modifiersOpt() {
- return modifiersOpt(null);
- }
- JCModifiers modifiersOpt(JCModifiers partial) {
- long flags = (partial == null) ? 0 : partial.flags;
- if (S.deprecatedFlag()) {
- flags |= Flags.DEPRECATED;
- S.resetDeprecatedFlag();
- }
- ListBuffer<JCAnnotation> annotations = new ListBuffer<JCAnnotation>();
- if (partial != null) annotations.appendList(partial.annotations);
- int pos = S.pos();
- int lastPos = Position.NOPOS;
- loop:
- while (true) {
- long flag;
- switch (S.token()) {
- case PRIVATE : flag = Flags.PRIVATE; break;
- case PROTECTED : flag = Flags.PROTECTED; break;
- case PUBLIC : flag = Flags.PUBLIC; break;
- case STATIC : flag = Flags.STATIC; break;
- case TRANSIENT : flag = Flags.TRANSIENT; break;
- case FINAL : flag = Flags.FINAL; break;
- case ABSTRACT : flag = Flags.ABSTRACT; break;
- case NATIVE : flag = Flags.NATIVE; break;
- case VOLATILE : flag = Flags.VOLATILE; break;
- case SYNCHRONIZED: flag = Flags.SYNCHRONIZED; break;
- case STRICTFP : flag = Flags.STRICTFP; break;
- case MONKEYS_AT : flag = Flags.ANNOTATION; break;
- default: break loop;
- }
- if ((flags & flag) != 0) log.error(S.pos(), "repeated.modifier");
- lastPos = S.pos();
- S.nextToken();
- if (flag == Flags.ANNOTATION) {
- checkAnnotations();
- if (S.token() != INTERFACE) {
- JCAnnotation ann = annotation(lastPos);
- // if first modifier is an annotation, set pos to annotation's.
- if (flags == 0 && annotations.isEmpty())
- pos = ann.pos;
- annotations.append(ann);
- lastPos = ann.pos;
- flag = 0;
- }
- }
- flags |= flag;
- }
- switch (S.token()) {
- case ENUM: flags |= Flags.ENUM; break;
- case INTERFACE: flags |= Flags.INTERFACE; break;
- default: break;
- }
-
- /* A modifiers tree with no modifier tokens or annotations
- * has no text position. */
- if (flags == 0 && annotations.isEmpty())
- pos = Position.NOPOS;
-
- JCModifiers mods = F.at(pos).Modifiers(flags, annotations.toList());
- if (pos != Position.NOPOS)
- storeEnd(mods, S.prevEndPos());
- return mods;
- }
-
- /** Annotation = "@" Qualident [ "(" AnnotationFieldValues ")" ]
- * @param pos position of "@" token
- */
- JCAnnotation annotation(int pos) {
- // accept(AT); // AT consumed by caller
- checkAnnotations();
- JCTree ident = qualident();
- List<JCExpression> fieldValues = annotationFieldValuesOpt();
- JCAnnotation ann = F.at(pos).Annotation(ident, fieldValues);
- storeEnd(ann, S.prevEndPos());
- return ann;
- }
-
- List<JCExpression> annotationFieldValuesOpt() {
- return (S.token() == LPAREN) ? annotationFieldValues() : List.<JCExpression>nil();
- }
-
- /** AnnotationFieldValues = "(" [ AnnotationFieldValue { "," AnnotationFieldValue } ] ")" */
- List<JCExpression> annotationFieldValues() {
- accept(LPAREN);
- ListBuffer<JCExpression> buf = new ListBuffer<JCExpression>();
- if (S.token() != RPAREN) {
- buf.append(annotationFieldValue());
- while (S.token() == COMMA) {
- S.nextToken();
- buf.append(annotationFieldValue());
- }
- }
- accept(RPAREN);
- return buf.toList();
- }
-
- /** AnnotationFieldValue = AnnotationValue
- * | Identifier "=" AnnotationValue
- */
- JCExpression annotationFieldValue() {
- if (S.token() == IDENTIFIER) {
- mode = EXPR;
- JCExpression t1 = term1();
- if (t1.getTag() == JCTree.IDENT && S.token() == EQ) {
- int pos = S.pos();
- accept(EQ);
- return toP(F.at(pos).Assign(t1, annotationValue()));
- } else {
- return t1;
- }
- }
- return annotationValue();
- }
-
- /* AnnotationValue = ConditionalExpression
- * | Annotation
- * | "{" [ AnnotationValue { "," AnnotationValue } ] "}"
- */
- JCExpression annotationValue() {
- int pos;
- switch (S.token()) {
- case MONKEYS_AT:
- pos = S.pos();
- S.nextToken();
- return annotation(pos);
- case LBRACE:
- pos = S.pos();
- accept(LBRACE);
- ListBuffer<JCExpression> buf = new ListBuffer<JCExpression>();
- if (S.token() != RBRACE) {
- buf.append(annotationValue());
- while (S.token() == COMMA) {
- S.nextToken();
- if (S.token() == RPAREN) break;
- buf.append(annotationValue());
- }
- }
- accept(RBRACE);
- return toP(F.at(pos).NewArray(null, List.<JCExpression>nil(), buf.toList()));
- default:
- mode = EXPR;
- return term1();
- }
- }
-
- /** VariableDeclarators = VariableDeclarator { "," VariableDeclarator }
- */
- public <T extends ListBuffer<? super JCVariableDecl>> T variableDeclarators(JCModifiers mods,
- JCExpression type,
- T vdefs)
- {
- return variableDeclaratorsRest(S.pos(), mods, type, ident(), false, null, vdefs);
- }
-
- /** VariableDeclaratorsRest = VariableDeclaratorRest { "," VariableDeclarator }
- * ConstantDeclaratorsRest = ConstantDeclaratorRest { "," ConstantDeclarator }
- *
- * @param reqInit Is an initializer always required?
- * @param dc The documentation comment for the variable declarations, or null.
- */
- <T extends ListBuffer<? super JCVariableDecl>> T variableDeclaratorsRest(int pos,
- JCModifiers mods,
- JCExpression type,
- Name name,
- boolean reqInit,
- String dc,
- T vdefs)
- {
- vdefs.append(variableDeclaratorRest(pos, mods, type, name, reqInit, dc));
- while (S.token() == COMMA) {
- // All but last of multiple declarators subsume a comma
- storeEnd((JCTree)vdefs.elems.last(), S.endPos());
- S.nextToken();
- vdefs.append(variableDeclarator(mods, type, reqInit, dc));
- }
- return vdefs;
- }
-
- /** VariableDeclarator = Ident VariableDeclaratorRest
- * ConstantDeclarator = Ident ConstantDeclaratorRest
- */
- JCVariableDecl variableDeclarator(JCModifiers mods, JCExpression type, boolean reqInit, String dc) {
- return variableDeclaratorRest(S.pos(), mods, type, ident(), reqInit, dc);
- }
-
- /** VariableDeclaratorRest = BracketsOpt ["=" VariableInitializer]
- * ConstantDeclaratorRest = BracketsOpt "=" VariableInitializer
- *
- * @param reqInit Is an initializer always required?
- * @param dc The documentation comment for the variable declarations, or null.
- */
- JCVariableDecl variableDeclaratorRest(int pos, JCModifiers mods, JCExpression type, Name name,
- boolean reqInit, String dc) {
- type = bracketsOpt(type);
- JCExpression init = null;
- if (S.token() == EQ) {
- S.nextToken();
- init = variableInitializer();
- }
- else if (reqInit) syntaxError(S.pos(), "expected", EQ);
- JCVariableDecl result =
- toP(F.at(pos).VarDef(mods, name, type, init));
- attach(result, dc);
- return result;
- }
-
- /** VariableDeclaratorId = Ident BracketsOpt
- */
- JCVariableDecl variableDeclaratorId(JCModifiers mods, JCExpression type) {
- int pos = S.pos();
- Name name = ident();
- if ((mods.flags & Flags.VARARGS) == 0)
- type = bracketsOpt(type);
- return toP(F.at(pos).VarDef(mods, name, type, null));
- }
-
- /** CompilationUnit = [ { "@" Annotation } PACKAGE Qualident ";"] {ImportDeclaration} {TypeDeclaration}
- */
- public JCTree.JCCompilationUnit compilationUnit() {
- int pos = S.pos();
- JCExpression pid = null;
- String dc = S.docComment();
- JCModifiers mods = null;
- List<JCAnnotation> packageAnnotations = List.nil();
- if (S.token() == MONKEYS_AT)
- mods = modifiersOpt();
-
- if (S.token() == PACKAGE) {
- if (mods != null) {
- checkNoMods(mods.flags);
- packageAnnotations = mods.annotations;
- mods = null;
- }
- S.nextToken();
- pid = qualident();
- accept(SEMI);
- }
- ListBuffer<JCTree> defs = new ListBuffer<JCTree>();
- boolean checkForImports = true;
- while (S.token() != EOF) {
- if (S.pos() <= errorEndPos) {
- // error recovery
- skip(checkForImports, false, false, false);
- if (S.token() == EOF)
- break;
- }
- if (checkForImports && mods == null && S.token() == IMPORT) {
- defs.append(importDeclaration());
- } else {
- JCTree def = typeDeclaration(mods);
- if (def instanceof JCExpressionStatement)
- def = ((JCExpressionStatement)def).expr;
- defs.append(def);
- if (def instanceof JCClassDecl)
- checkForImports = false;
- mods = null;
- }
- }
- JCTree.JCCompilationUnit toplevel = F.at(pos).TopLevel(packageAnnotations, pid, defs.toList());
- attach(toplevel, dc);
- if (defs.elems.isEmpty())
- storeEnd(toplevel, S.prevEndPos());
- if (keepDocComments) toplevel.docComments = docComments;
- return toplevel;
- }
-
- /** ImportDeclaration = IMPORT [ STATIC ] Ident { "." Ident } [ "." "*" ] ";"
- */
- JCTree importDeclaration() {
- int pos = S.pos();
- S.nextToken();
- boolean importStatic = false;
- if (S.token() == STATIC) {
- checkStaticImports();
- importStatic = true;
- S.nextToken();
- }
- JCExpression pid = toP(F.at(S.pos()).Ident(ident()));
- do {
- int pos1 = S.pos();
- accept(DOT);
- if (S.token() == STAR) {
- pid = to(F.at(pos1).Select(pid, names.asterisk));
- S.nextToken();
- break;
- } else {
- pid = toP(F.at(pos1).Select(pid, ident()));
- }
- } while (S.token() == DOT);
- accept(SEMI);
- return toP(F.at(pos).Import(pid, importStatic));
- }
-
- /** TypeDeclaration = ClassOrInterfaceOrEnumDeclaration
- * | ";"
- */
- JCTree typeDeclaration(JCModifiers mods) {
- int pos = S.pos();
- if (mods == null && S.token() == SEMI) {
- S.nextToken();
- return toP(F.at(pos).Skip());
- } else {
- String dc = S.docComment();
- return classOrInterfaceOrEnumDeclaration(modifiersOpt(mods), dc);
- }
- }
-
- /** ClassOrInterfaceOrEnumDeclaration = ModifiersOpt
- * (ClassDeclaration | InterfaceDeclaration | EnumDeclaration)
- * @param mods Any modifiers starting the class or interface declaration
- * @param dc The documentation comment for the class, or null.
+ /**
+ * Parse a type.
+ * @return an expression for a type
*/
- JCStatement classOrInterfaceOrEnumDeclaration(JCModifiers mods, String dc) {
- if (S.token() == CLASS) {
- return classDeclaration(mods, dc);
- } else if (S.token() == INTERFACE) {
- return interfaceDeclaration(mods, dc);
- } else if (allowEnums) {
- if (S.token() == ENUM) {
- return enumDeclaration(mods, dc);
- } else {
- int pos = S.pos();
- List<JCTree> errs;
- if (S.token() == IDENTIFIER) {
- errs = List.<JCTree>of(mods, toP(F.at(pos).Ident(ident())));
- setErrorEndPos(S.pos());
- } else {
- errs = List.<JCTree>of(mods);
- }
- return toP(F.Exec(syntaxError(pos, errs, "expected3",
- CLASS, INTERFACE, ENUM)));
- }
- } else {
- if (S.token() == ENUM) {
- log.error(S.pos(), "enums.not.supported.in.source", source.name);
- allowEnums = true;
- return enumDeclaration(mods, dc);
- }
- int pos = S.pos();
- List<JCTree> errs;
- if (S.token() == IDENTIFIER) {
- errs = List.<JCTree>of(mods, toP(F.at(pos).Ident(ident())));
- setErrorEndPos(S.pos());
- } else {
- errs = List.<JCTree>of(mods);
- }
- return toP(F.Exec(syntaxError(pos, errs, "expected2",
- CLASS, INTERFACE)));
- }
- }
-
- /** ClassDeclaration = CLASS Ident TypeParametersOpt [EXTENDS Type]
- * [IMPLEMENTS TypeList] ClassBody
- * @param mods The modifiers starting the class declaration
- * @param dc The documentation comment for the class, or null.
- */
- JCClassDecl classDeclaration(JCModifiers mods, String dc) {
- int pos = S.pos();
- accept(CLASS);
- Name name = ident();
-
- List<JCTypeParameter> typarams = typeParametersOpt();
-
- JCTree extending = null;
- if (S.token() == EXTENDS) {
- S.nextToken();
- extending = type();
- }
- List<JCExpression> implementing = List.nil();
- if (S.token() == IMPLEMENTS) {
- S.nextToken();
- implementing = typeList();
- }
- List<JCTree> defs = classOrInterfaceBody(name, false);
- JCClassDecl result = toP(F.at(pos).ClassDef(
- mods, name, typarams, extending, implementing, defs));
- attach(result, dc);
- return result;
- }
-
- /** InterfaceDeclaration = INTERFACE Ident TypeParametersOpt
- * [EXTENDS TypeList] InterfaceBody
- * @param mods The modifiers starting the interface declaration
- * @param dc The documentation comment for the interface, or null.
- */
- JCClassDecl interfaceDeclaration(JCModifiers mods, String dc) {
- int pos = S.pos();
- accept(INTERFACE);
- Name name = ident();
-
- List<JCTypeParameter> typarams = typeParametersOpt();
-
- List<JCExpression> extending = List.nil();
- if (S.token() == EXTENDS) {
- S.nextToken();
- extending = typeList();
- }
- List<JCTree> defs = classOrInterfaceBody(name, true);
- JCClassDecl result = toP(F.at(pos).ClassDef(
- mods, name, typarams, null, extending, defs));
- attach(result, dc);
- return result;
- }
-
- /** EnumDeclaration = ENUM Ident [IMPLEMENTS TypeList] EnumBody
- * @param mods The modifiers starting the enum declaration
- * @param dc The documentation comment for the enum, or null.
- */
- JCClassDecl enumDeclaration(JCModifiers mods, String dc) {
- int pos = S.pos();
- accept(ENUM);
- Name name = ident();
-
- List<JCExpression> implementing = List.nil();
- if (S.token() == IMPLEMENTS) {
- S.nextToken();
- implementing = typeList();
- }
-
- List<JCTree> defs = enumBody(name);
- JCModifiers newMods =
- F.at(mods.pos).Modifiers(mods.flags|Flags.ENUM, mods.annotations);
- JCClassDecl result = toP(F.at(pos).
- ClassDef(newMods, name, List.<JCTypeParameter>nil(),
- null, implementing, defs));
- attach(result, dc);
- return result;
- }
-
- /** EnumBody = "{" { EnumeratorDeclarationList } [","]
- * [ ";" {ClassBodyDeclaration} ] "}"
- */
- List<JCTree> enumBody(Name enumName) {
- accept(LBRACE);
- ListBuffer<JCTree> defs = new ListBuffer<JCTree>();
- if (S.token() == COMMA) {
- S.nextToken();
- } else if (S.token() != RBRACE && S.token() != SEMI) {
- defs.append(enumeratorDeclaration(enumName));
- while (S.token() == COMMA) {
- S.nextToken();
- if (S.token() == RBRACE || S.token() == SEMI) break;
- defs.append(enumeratorDeclaration(enumName));
- }
- if (S.token() != SEMI && S.token() != RBRACE) {
- defs.append(syntaxError(S.pos(), "expected3",
- COMMA, RBRACE, SEMI));
- S.nextToken();
- }
- }
- if (S.token() == SEMI) {
- S.nextToken();
- while (S.token() != RBRACE && S.token() != EOF) {
- defs.appendList(classOrInterfaceBodyDeclaration(enumName,
- false));
- if (S.pos() <= errorEndPos) {
- // error recovery
- skip(false, true, true, false);
- }
- }
- }
- accept(RBRACE);
- return defs.toList();
- }
-
- /** EnumeratorDeclaration = AnnotationsOpt [TypeArguments] IDENTIFIER [ Arguments ] [ "{" ClassBody "}" ]
- */
- JCTree enumeratorDeclaration(Name enumName) {
- String dc = S.docComment();
- int flags = Flags.PUBLIC|Flags.STATIC|Flags.FINAL|Flags.ENUM;
- if (S.deprecatedFlag()) {
- flags |= Flags.DEPRECATED;
- S.resetDeprecatedFlag();
- }
- int pos = S.pos();
- List<JCAnnotation> annotations = annotationsOpt();
- JCModifiers mods = F.at(annotations.isEmpty() ? Position.NOPOS : pos).Modifiers(flags, annotations);
- List<JCExpression> typeArgs = typeArgumentsOpt();
- int identPos = S.pos();
- Name name = ident();
- int createPos = S.pos();
- List<JCExpression> args = (S.token() == LPAREN)
- ? arguments() : List.<JCExpression>nil();
- JCClassDecl body = null;
- if (S.token() == LBRACE) {
- JCModifiers mods1 = F.at(Position.NOPOS).Modifiers(Flags.ENUM | Flags.STATIC);
- List<JCTree> defs = classOrInterfaceBody(names.empty, false);
- body = toP(F.at(identPos).AnonymousClassDef(mods1, defs));
- }
- if (args.isEmpty() && body == null)
- createPos = Position.NOPOS;
- JCIdent ident = F.at(Position.NOPOS).Ident(enumName);
- JCNewClass create = F.at(createPos).NewClass(null, typeArgs, ident, args, body);
- if (createPos != Position.NOPOS)
- storeEnd(create, S.prevEndPos());
- ident = F.at(Position.NOPOS).Ident(enumName);
- JCTree result = toP(F.at(pos).VarDef(mods, name, ident, create));
- attach(result, dc);
- return result;
- }
-
- /** TypeList = Type {"," Type}
- */
- List<JCExpression> typeList() {
- ListBuffer<JCExpression> ts = new ListBuffer<JCExpression>();
- ts.append(type());
- while (S.token() == COMMA) {
- S.nextToken();
- ts.append(type());
- }
- return ts.toList();
- }
-
- /** ClassBody = "{" {ClassBodyDeclaration} "}"
- * InterfaceBody = "{" {InterfaceBodyDeclaration} "}"
- */
- List<JCTree> classOrInterfaceBody(Name className, boolean isInterface) {
- accept(LBRACE);
- if (S.pos() <= errorEndPos) {
- // error recovery
- skip(false, true, false, false);
- if (S.token() == LBRACE)
- S.nextToken();
- }
- ListBuffer<JCTree> defs = new ListBuffer<JCTree>();
- while (S.token() != RBRACE && S.token() != EOF) {
- defs.appendList(classOrInterfaceBodyDeclaration(className, isInterface));
- if (S.pos() <= errorEndPos) {
- // error recovery
- skip(false, true, true, false);
- }
- }
- accept(RBRACE);
- return defs.toList();
- }
-
- /** ClassBodyDeclaration =
- * ";"
- * | [STATIC] Block
- * | ModifiersOpt
- * ( Type Ident
- * ( VariableDeclaratorsRest ";" | MethodDeclaratorRest )
- * | VOID Ident MethodDeclaratorRest
- * | TypeParameters (Type | VOID) Ident MethodDeclaratorRest
- * | Ident ConstructorDeclaratorRest
- * | TypeParameters Ident ConstructorDeclaratorRest
- * | ClassOrInterfaceOrEnumDeclaration
- * )
- * InterfaceBodyDeclaration =
- * ";"
- * | ModifiersOpt Type Ident
- * ( ConstantDeclaratorsRest | InterfaceMethodDeclaratorRest ";" )
- */
- List<JCTree> classOrInterfaceBodyDeclaration(Name className, boolean isInterface) {
- if (S.token() == SEMI) {
- S.nextToken();
- return List.<JCTree>of(F.at(Position.NOPOS).Block(0, List.<JCStatement>nil()));
- } else {
- String dc = S.docComment();
- int pos = S.pos();
- JCModifiers mods = modifiersOpt();
- if (S.token() == CLASS ||
- S.token() == INTERFACE ||
- allowEnums && S.token() == ENUM) {
- return List.<JCTree>of(classOrInterfaceOrEnumDeclaration(mods, dc));
- } else if (S.token() == LBRACE && !isInterface &&
- (mods.flags & Flags.StandardFlags & ~Flags.STATIC) == 0 &&
- mods.annotations.isEmpty()) {
- return List.<JCTree>of(block(pos, mods.flags));
- } else {
- pos = S.pos();
- List<JCTypeParameter> typarams = typeParametersOpt();
- // Hack alert: if there are type arguments but no Modifiers, the start
- // position will be lost unless we set the Modifiers position. There
- // should be an AST node for type parameters (BugId 5005090).
- if (typarams.length() > 0 && mods.pos == Position.NOPOS) {
- mods.pos = pos;
- }
- Token token = S.token();
- Name name = S.name();
- pos = S.pos();
- JCExpression type;
- boolean isVoid = S.token() == VOID;
- if (isVoid) {
- type = to(F.at(pos).TypeIdent(TypeTags.VOID));
- S.nextToken();
- } else {
- type = type();
- }
- if (S.token() == LPAREN && !isInterface && type.getTag() == JCTree.IDENT) {
- if (isInterface || name != className)
- log.error(pos, "invalid.meth.decl.ret.type.req");
- return List.of(methodDeclaratorRest(
- pos, mods, null, names.init, typarams,
- isInterface, true, dc));
- } else {
- pos = S.pos();
- name = ident();
- if (S.token() == LPAREN) {
- return List.of(methodDeclaratorRest(
- pos, mods, type, name, typarams,
- isInterface, isVoid, dc));
- } else if (!isVoid && typarams.isEmpty()) {
- List<JCTree> defs =
- variableDeclaratorsRest(pos, mods, type, name, isInterface, dc,
- new ListBuffer<JCTree>()).toList();
- storeEnd(defs.last(), S.endPos());
- accept(SEMI);
- return defs;
- } else {
- pos = S.pos();
- List<JCTree> err = isVoid
- ? List.<JCTree>of(toP(F.at(pos).MethodDef(mods, name, type, typarams,
- List.<JCVariableDecl>nil(), List.<JCExpression>nil(), null, null)))
- : null;
- return List.<JCTree>of(syntaxError(S.pos(), err, "expected", LPAREN));
- }
- }
- }
- }
- }
-
- /** MethodDeclaratorRest =
- * FormalParameters BracketsOpt [Throws TypeList] ( MethodBody | [DEFAULT AnnotationValue] ";")
- * VoidMethodDeclaratorRest =
- * FormalParameters [Throws TypeList] ( MethodBody | ";")
- * InterfaceMethodDeclaratorRest =
- * FormalParameters BracketsOpt [THROWS TypeList] ";"
- * VoidInterfaceMethodDeclaratorRest =
- * FormalParameters [THROWS TypeList] ";"
- * ConstructorDeclaratorRest =
- * "(" FormalParameterListOpt ")" [THROWS TypeList] MethodBody
- */
- JCTree methodDeclaratorRest(int pos,
- JCModifiers mods,
- JCExpression type,
- Name name,
- List<JCTypeParameter> typarams,
- boolean isInterface, boolean isVoid,
- String dc) {
- List<JCVariableDecl> params = formalParameters();
- if (!isVoid) type = bracketsOpt(type);
- List<JCExpression> thrown = List.nil();
- if (S.token() == THROWS) {
- S.nextToken();
- thrown = qualidentList();
- }
- JCBlock body = null;
- JCExpression defaultValue;
- if (S.token() == LBRACE) {
- body = block();
- defaultValue = null;
- } else {
- if (S.token() == DEFAULT) {
- accept(DEFAULT);
- defaultValue = annotationValue();
- } else {
- defaultValue = null;
- }
- accept(SEMI);
- if (S.pos() <= errorEndPos) {
- // error recovery
- skip(false, true, false, false);
- if (S.token() == LBRACE) {
- body = block();
- }
- }
- }
- JCMethodDecl result =
- toP(F.at(pos).MethodDef(mods, name, type, typarams,
- params, thrown,
- body, defaultValue));
- attach(result, dc);
- return result;
- }
-
- /** QualidentList = Qualident {"," Qualident}
- */
- List<JCExpression> qualidentList() {
- ListBuffer<JCExpression> ts = new ListBuffer<JCExpression>();
- ts.append(qualident());
- while (S.token() == COMMA) {
- S.nextToken();
- ts.append(qualident());
- }
- return ts.toList();
- }
-
- /** TypeParametersOpt = ["<" TypeParameter {"," TypeParameter} ">"]
- */
- List<JCTypeParameter> typeParametersOpt() {
- if (S.token() == LT) {
- checkGenerics();
- ListBuffer<JCTypeParameter> typarams = new ListBuffer<JCTypeParameter>();
- S.nextToken();
- typarams.append(typeParameter());
- while (S.token() == COMMA) {
- S.nextToken();
- typarams.append(typeParameter());
- }
- accept(GT);
- return typarams.toList();
- } else {
- return List.nil();
- }
- }
-
- /** TypeParameter = TypeVariable [TypeParameterBound]
- * TypeParameterBound = EXTENDS Type {"&" Type}
- * TypeVariable = Ident
- */
- JCTypeParameter typeParameter() {
- int pos = S.pos();
- Name name = ident();
- ListBuffer<JCExpression> bounds = new ListBuffer<JCExpression>();
- if (S.token() == EXTENDS) {
- S.nextToken();
- bounds.append(type());
- while (S.token() == AMP) {
- S.nextToken();
- bounds.append(type());
- }
- }
- return toP(F.at(pos).TypeParameter(name, bounds.toList()));
- }
-
- /** FormalParameters = "(" [ FormalParameterList ] ")"
- * FormalParameterList = [ FormalParameterListNovarargs , ] LastFormalParameter
- * FormalParameterListNovarargs = [ FormalParameterListNovarargs , ] FormalParameter
- */
- List<JCVariableDecl> formalParameters() {
- ListBuffer<JCVariableDecl> params = new ListBuffer<JCVariableDecl>();
- JCVariableDecl lastParam = null;
- accept(LPAREN);
- if (S.token() != RPAREN) {
- params.append(lastParam = formalParameter());
- while ((lastParam.mods.flags & Flags.VARARGS) == 0 && S.token() == COMMA) {
- S.nextToken();
- params.append(lastParam = formalParameter());
- }
- }
- accept(RPAREN);
- return params.toList();
- }
-
- JCModifiers optFinal(long flags) {
- JCModifiers mods = modifiersOpt();
- checkNoMods(mods.flags & ~(Flags.FINAL | Flags.DEPRECATED));
- mods.flags |= flags;
- return mods;
- }
-
- /** FormalParameter = { FINAL | '@' Annotation } Type VariableDeclaratorId
- * LastFormalParameter = { FINAL | '@' Annotation } Type '...' Ident | FormalParameter
- */
- JCVariableDecl formalParameter() {
- JCModifiers mods = optFinal(Flags.PARAMETER);
- JCExpression type = type();
- if (S.token() == ELLIPSIS) {
- checkVarargs();
- mods.flags |= Flags.VARARGS;
- type = to(F.at(S.pos()).TypeArray(type));
- S.nextToken();
- }
- return variableDeclaratorId(mods, type);
- }
-
-/* ---------- auxiliary methods -------------- */
-
- /** Check that given tree is a legal expression statement.
- */
- protected JCExpression checkExprStat(JCExpression t) {
- switch(t.getTag()) {
- case JCTree.PREINC: case JCTree.PREDEC:
- case JCTree.POSTINC: case JCTree.POSTDEC:
- case JCTree.ASSIGN:
- case JCTree.BITOR_ASG: case JCTree.BITXOR_ASG: case JCTree.BITAND_ASG:
- case JCTree.SL_ASG: case JCTree.SR_ASG: case JCTree.USR_ASG:
- case JCTree.PLUS_ASG: case JCTree.MINUS_ASG:
- case JCTree.MUL_ASG: case JCTree.DIV_ASG: case JCTree.MOD_ASG:
- case JCTree.APPLY: case JCTree.NEWCLASS:
- case JCTree.ERRONEOUS:
- return t;
- default:
- log.error(t.pos, "not.stmt");
- return F.at(t.pos).Erroneous(List.<JCTree>of(t));
- }
- }
-
- /** Return precedence of operator represented by token,
- * -1 if token is not a binary operator. @see TreeInfo.opPrec
- */
- static int prec(Token token) {
- int oc = optag(token);
- return (oc >= 0) ? TreeInfo.opPrec(oc) : -1;
- }
-
- /** Return operation tag of binary operator represented by token,
- * -1 if token is not a binary operator.
- */
- static int optag(Token token) {
- switch (token) {
- case BARBAR:
- return JCTree.OR;
- case AMPAMP:
- return JCTree.AND;
- case BAR:
- return JCTree.BITOR;
- case BAREQ:
- return JCTree.BITOR_ASG;
- case CARET:
- return JCTree.BITXOR;
- case CARETEQ:
- return JCTree.BITXOR_ASG;
- case AMP:
- return JCTree.BITAND;
- case AMPEQ:
- return JCTree.BITAND_ASG;
- case EQEQ:
- return JCTree.EQ;
- case BANGEQ:
- return JCTree.NE;
- case LT:
- return JCTree.LT;
- case GT:
- return JCTree.GT;
- case LTEQ:
- return JCTree.LE;
- case GTEQ:
- return JCTree.GE;
- case LTLT:
- return JCTree.SL;
- case LTLTEQ:
- return JCTree.SL_ASG;
- case GTGT:
- return JCTree.SR;
- case GTGTEQ:
- return JCTree.SR_ASG;
- case GTGTGT:
- return JCTree.USR;
- case GTGTGTEQ:
- return JCTree.USR_ASG;
- case PLUS:
- return JCTree.PLUS;
- case PLUSEQ:
- return JCTree.PLUS_ASG;
- case SUB:
- return JCTree.MINUS;
- case SUBEQ:
- return JCTree.MINUS_ASG;
- case STAR:
- return JCTree.MUL;
- case STAREQ:
- return JCTree.MUL_ASG;
- case SLASH:
- return JCTree.DIV;
- case SLASHEQ:
- return JCTree.DIV_ASG;
- case PERCENT:
- return JCTree.MOD;
- case PERCENTEQ:
- return JCTree.MOD_ASG;
- case INSTANCEOF:
- return JCTree.TYPETEST;
- default:
- return -1;
- }
- }
-
- /** Return operation tag of unary operator represented by token,
- * -1 if token is not a binary operator.
- */
- static int unoptag(Token token) {
- switch (token) {
- case PLUS:
- return JCTree.POS;
- case SUB:
- return JCTree.NEG;
- case BANG:
- return JCTree.NOT;
- case TILDE:
- return JCTree.COMPL;
- case PLUSPLUS:
- return JCTree.PREINC;
- case SUBSUB:
- return JCTree.PREDEC;
- default:
- return -1;
- }
- }
-
- /** Return type tag of basic type represented by token,
- * -1 if token is not a basic type identifier.
- */
- static int typetag(Token token) {
- switch (token) {
- case BYTE:
- return TypeTags.BYTE;
- case CHAR:
- return TypeTags.CHAR;
- case SHORT:
- return TypeTags.SHORT;
- case INT:
- return TypeTags.INT;
- case LONG:
- return TypeTags.LONG;
- case FLOAT:
- return TypeTags.FLOAT;
- case DOUBLE:
- return TypeTags.DOUBLE;
- case BOOLEAN:
- return TypeTags.BOOLEAN;
- default:
- return -1;
- }
- }
-
- void checkGenerics() {
- if (!allowGenerics) {
- log.error(S.pos(), "generics.not.supported.in.source", source.name);
- allowGenerics = true;
- }
- }
- void checkVarargs() {
- if (!allowVarargs) {
- log.error(S.pos(), "varargs.not.supported.in.source", source.name);
- allowVarargs = true;
- }
- }
- void checkForeach() {
- if (!allowForeach) {
- log.error(S.pos(), "foreach.not.supported.in.source", source.name);
- allowForeach = true;
- }
- }
- void checkStaticImports() {
- if (!allowStaticImport) {
- log.error(S.pos(), "static.import.not.supported.in.source", source.name);
- allowStaticImport = true;
- }
- }
- void checkAnnotations() {
- if (!allowAnnotations) {
- log.error(S.pos(), "annotations.not.supported.in.source", source.name);
- allowAnnotations = true;
- }
- }
+ JCExpression parseType();
}