org.sonar.sslr.internal.vm
Class Machine

java.lang.Object
  org.sonar.sslr.internal.vm.Machine

All Implemented Interfaces:

CharSequence

public class Machine
extends Object
implements CharSequence

Duplicates corresponding class from SSLR to improve:

• Performance in case of parsing list of tokens multiple times, but with different starting positions. Hot spot for original class in such case - is a conversion from list to array.
• Error reporting (see COBOL-873, COBOL-435).

Constructor Summary

Machine(String input, Instruction[] instructions, MachineHandler handler)

Method Summary

void	advanceIndex(int offset)
void	backtrack()
char	charAt(int offset)
void	createLeafNode(Matcher matcher, int offset)
void	createNode()
int	getAddress()
int	getIndex()
void	jump(int offset)
int	length()
static ParsingResult	parse(char[] input, CompiledGrammar grammar)
static ParseNode	parse(List<Token> tokens, CompiledGrammar grammar)
MachineStack	peek()
void	pop()
void	popReturn()
void	pushBacktrack(int offset)
void	pushReturn(int returnOffset, Matcher matcher, int callOffset)
void	setAddress(int address)
void	setIgnoreErrors(boolean ignoreErrors)
void	setIndex(int index)
CharSequence	subSequence(int start, int end) Not supported.
Token	tokenAt(int offset)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.CharSequence

toString

Constructor Detail

Machine

public Machine(String input,
               Instruction[] instructions,
               MachineHandler handler)

Method Detail

parse

public static ParseNode parse(List<Token> tokens,
                              CompiledGrammar grammar)

parse

public static ParsingResult parse(char[] input,
                                  CompiledGrammar grammar)

getAddress

public int getAddress()

setAddress

public void setAddress(int address)

jump

public void jump(int offset)

popReturn

public void popReturn()

pushReturn

public void pushReturn(int returnOffset,
                       Matcher matcher,
                       int callOffset)

pushBacktrack

public void pushBacktrack(int offset)

pop

public void pop()

peek

public MachineStack peek()

setIgnoreErrors

public void setIgnoreErrors(boolean ignoreErrors)

backtrack

public void backtrack()

createNode

public void createNode()

createLeafNode

public void createLeafNode(Matcher matcher,
                           int offset)

getIndex

public int getIndex()

setIndex

public void setIndex(int index)

advanceIndex

public void advanceIndex(int offset)

length

public int length()

Specified by:

length in interface CharSequence

charAt

public char charAt(int offset)

Specified by:

charAt in interface CharSequence

subSequence

public CharSequence subSequence(int start,
                                int end)

Not supported.

Specified by:

subSequence in interface CharSequence

Throws:

UnsupportedOperationException - always

tokenAt

public Token tokenAt(int offset)