Class TokenBuffer.Cursor

java.lang.Object

io.github.protasm.jvmud.compiler.token.TokenBuffer.Cursor

Enclosing class:

TokenBuffer

public final class TokenBuffer.Cursor
extends Object

Parser-facing reader over this buffer.

Method Summary

Modifier and Type	Method	Description
Token<?>	advance()	Advance by one; stays on EOF once past end.
Token<?>	advanceThrough(TokenType type)	Consume repeated occurrences of a single type.
boolean	check(TokenType... types)	True if current token matches any of the given types (no consume).
Token<?>	consume(String messageIfMismatch, TokenType... expected)	Consume exactly one of the expected types or throw.
Token<?>	current()
boolean	isAtEnd()
int	mark()
boolean	match(TokenType... types)	If current matches any type, consume and return true; else false.
Token<?>	peek(int k)	Lookahead where peek(0)==current().
int	position()
Token<?>	previous()
void	rewind(int mark)

Methods inherited from class Object

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

Method Details

position

public int position()

isAtEnd

public boolean isAtEnd()

mark

public int mark()

rewind

public void rewind(int mark)

peek

public Token<?> peek(int k)

Lookahead where peek(0)==current(). Never throws; returns EOF past end.

current

public Token<?> current()

previous

public Token<?> previous()

advance

public Token<?> advance()

Advance by one; stays on EOF once past end. Returns the consumed token.

check

public boolean check(TokenType... types)

True if current token matches any of the given types (no consume).

match

public boolean match(TokenType... types)

If current matches any type, consume and return true; else false.

consume

public Token<?> consume(String messageIfMismatch,
 TokenType... expected)

Consume exactly one of the expected types or throw. Returns the consumed token.

advanceThrough

public Token<?> advanceThrough(TokenType type)

Consume repeated occurrences of a single type. Returns the last consumed or EOF if none.