javafe.parser
Class ParseUtil

java.lang.Object
  javafe.parser.ParseUtil

Direct Known Subclasses:

ParseType

public class ParseUtil

extends java.lang.Object

Base class for Java parser; provides some basic parsing utilities.

See Also:

ASTNode, ParseType, Parse

Field Summary

private static ASTDecoration	elementUniverseDecoration
static int[]	modifierKeywords Keyword at index i in this array corresponds to bit i in modifier bitset.
ModifierPragmaVec	modifierPragmas As a side effect, parseModifiers mutates this value.
protected StackVector	seqModifierPragma
int[]	universeArray
private static ASTDecoration	universeDecoration
int	universeLevel
boolean	useUniverses

Constructor Summary

ParseUtil()

Method Summary

static java.lang.String	arrayToString(java.lang.Object[] a, java.lang.String sep)
static void	error(int loc, java.lang.String m)
void	expect(Lex l, int expected) Takes an expected token from the input stream, calls fail on error.
static void	fail(int loc, java.lang.String m) Raises a RuntimeException with the argument string including a textual representation of the given source location.
static int	getElementUniverse(ASTNode i)
int	getJavaModifier(Lex l, int modifiers) Checks if the next token is a Java modifier.
static int	getUniverse(ASTNode i)
boolean	isJavaModifier(int ttype)
(package private) int	operatorTokenToTag(int token) Converts operator tokens to corresponding AST tag.
ModifierPragmaVec	parseModifierPragmas(Lex l) Parse a list of modifier pragmas.
int	parseModifiers(Lex l) Parse a list of modifiers.
ModifierPragmaVec	parseMoreModifierPragmas(Lex l, ModifierPragmaVec orig) Parse a list of modifier pragmas and adds them to an existing ModifierPragmaVec.
void	parseUniverses(Lex l)
static ASTNode	setElementUniverse(ASTNode i, int u)
static ASTNode	setUniverse(ASTNode i, int u)
static ASTNode	setUniverse(ASTNode i, int[] a, Type t, int loc)
static ASTNode	setUniverse(GenericVarDecl i, int[] a)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

universeLevel

public int universeLevel

useUniverses

public boolean useUniverses

universeArray

public int[] universeArray

seqModifierPragma

protected final StackVector seqModifierPragma

modifierKeywords

public static final int[] modifierKeywords

Keyword at index i in this array corresponds to bit i in modifier bitset. Thus PRIVATE is at index 1, ACC_PRIVATE = 1<<1. These are in the same bit order as the values in java.lang.reflect.Modifier, and should remain that way, though I don't know if any code uses that fact (it might come in handy in reading class files, for example).

modifierPragmas

public ModifierPragmaVec modifierPragmas

As a side effect, parseModifiers mutates this value.

universeDecoration

private static ASTDecoration universeDecoration

elementUniverseDecoration

private static ASTDecoration elementUniverseDecoration

Constructor Detail

ParseUtil

public ParseUtil()

Method Detail

fail

public static void fail(int loc,
                        java.lang.String m)

Raises a RuntimeException with the argument string including a textual representation of the given source location.

error

public static void error(int loc,
                         java.lang.String m)

expect

public void expect(Lex l,
                   int expected)

Takes an expected token from the input stream, calls fail on error.

operatorTokenToTag

int operatorTokenToTag(int token)

Converts operator tokens to corresponding AST tag. Tokens INC and DEC get mapped to PREFIXINC and PREFIXDEC

parseModifierPragmas

public ModifierPragmaVec parseModifierPragmas(Lex l)

Parse a list of modifier pragmas. Returns null if l does not point to a modifier pragma. Otherwise, reads l until there are no more modifier pragmas and returns the resulting list.

parseMoreModifierPragmas

public ModifierPragmaVec parseMoreModifierPragmas(Lex l,
                                                  ModifierPragmaVec orig)

Parse a list of modifier pragmas and adds them to an existing ModifierPragmaVec. If the existing ModifierPragmaVec was null, then it either returns null (if l does not point to a modifier pragma), or returns a new ModifierPragmaVec.

parseModifiers

public int parseModifiers(Lex l)

Parse a list of modifiers. Ensures no duplicate Java modifiers and only one of the access modifiers public, protected, private. Return integer encoding the Java modifiers.

In addition to parsing Java modifiers, also handles modifier pragmas (anything with a ttype of TagConstants.MODIFIERPRAGMA). If no modifier pragmas are seen, sets modifierPragmas to null. Otherwise, sets it to be the list of modifier pragmas seen in the course of parsing any Java modifiers.

See Also:

Modifiers

getJavaModifier

public int getJavaModifier(Lex l,
                           int modifiers)

Checks if the next token is a Java modifier. Returns 0 if it is not; returns an int with the modifier bit turned on if it is. Also issues an error if the modifier is already present in the modifiers argument (use 0 for this argument to turn off these errors). Note that the bit that is found is not ORed into the modifiers int; you have to do that outside this call. The Lex is advanced if a modifier is found.

isJavaModifier

public boolean isJavaModifier(int ttype)

arrayToString

public static java.lang.String arrayToString(java.lang.Object[] a,
                                             java.lang.String sep)

parseUniverses

public void parseUniverses(Lex l)

setUniverse

public static ASTNode setUniverse(ASTNode i,
                                  int u)

setUniverse

public static ASTNode setUniverse(ASTNode i,
                                  int[] a,
                                  Type t,
                                  int loc)

setUniverse

public static ASTNode setUniverse(GenericVarDecl i,
                                  int[] a)

getUniverse

public static int getUniverse(ASTNode i)

setElementUniverse

public static ASTNode setElementUniverse(ASTNode i,
                                         int u)

getElementUniverse

public static int getElementUniverse(ASTNode i)