org.ssssssss.script.parsing

类 TokenStream

java.lang.Object

org.ssssssss.script.parsing.TokenStream

public class TokenStream
extends Object

Iterates over a list of Token instances, provides methods to match expected tokens and throw errors in case of a mismatch.

构造器概要

构造器

构造器和说明
TokenStream(List<Token> tokens)

方法概要

限定符和类型	方法和说明
Token	consume() Consumes the next token and returns it.
Token	expect(String text) Checks if the next token matches the given text and optionally consumes, or throws an error if the next token did not match the text.
Token	expect(TokenType type) Checks if the next token has the give type and optionally consumes, or throws an error if the next token did not match the type.
Token	getPrev()
String	getSource() Returns the Source this stream wraps.
boolean	hasMore() Returns whether there are more tokens in the stream.
boolean	hasNext()
boolean	hasPrev()
int	makeIndex()
boolean	match(boolean consume, String... tokenTexts) Matches any of the token texts and optionally consumes the next token in case of a match.
boolean	match(boolean consume, TokenType... types) Matches any of the token types and optionally consumes the next token in case of a match.
boolean	match(List<String> texts, boolean consume)
boolean	match(String text, boolean consume) Matches and optionally consumes the next token in case of a match.
boolean	match(TokenType type, boolean consume) Matches and optionally consumes the next token in case of a match.
Token	next()
Token	prev()
void	resetIndex()
void	resetIndex(int index)

从类继承的方法 java.lang.Object

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

构造器详细资料

TokenStream

public TokenStream(List<Token> tokens)

方法详细资料

hasMore

public boolean hasMore()

Returns whether there are more tokens in the stream.

hasNext

public boolean hasNext()

hasPrev

public boolean hasPrev()

makeIndex

public int makeIndex()

resetIndex

public void resetIndex()

resetIndex

public void resetIndex(int index)

consume

public Token consume()

Consumes the next token and returns it.

next

public Token next()

prev

public Token prev()

getPrev

public Token getPrev()

expect

public Token expect(TokenType type)

Checks if the next token has the give type and optionally consumes, or throws an error if the next token did not match the type.

expect

public Token expect(String text)

Checks if the next token matches the given text and optionally consumes, or throws an error if the next token did not match the text.

match

public boolean match(TokenType type,
                     boolean consume)

Matches and optionally consumes the next token in case of a match. Returns whether the token matched.

match

public boolean match(List<String> texts,
                     boolean consume)

match

public boolean match(String text,
                     boolean consume)

Matches and optionally consumes the next token in case of a match. Returns whether the token matched.

match

public boolean match(boolean consume,
                     TokenType... types)

Matches any of the token types and optionally consumes the next token in case of a match. Returns whether the token matched.

match

public boolean match(boolean consume,
                     String... tokenTexts)

Matches any of the token texts and optionally consumes the next token in case of a match. Returns whether the token matched.

getSource

public String getSource()

Returns the Source this stream wraps.