public final class ScannerImpl extends Object implements Scanner
Scanner produces tokens of the following types: STREAM-START STREAM-END DIRECTIVE(name, value) DOCUMENT-START DOCUMENT-END BLOCK-SEQUENCE-START BLOCK-MAPPING-START BLOCK-END FLOW-SEQUENCE-START FLOW-MAPPING-START FLOW-SEQUENCE-END FLOW-MAPPING-END BLOCK-ENTRY FLOW-ENTRY KEY VALUE ALIAS(value) ANCHOR(value) TAG(value) SCALAR(value, plain, style) Read comments in the Scanner code for more details.
Modifier and Type | Field and Description |
---|---|
static Map<Character,Integer> |
ESCAPE_CODES
A mapping from a character to a number of bytes to read-ahead for that
escape sequence.
|
static Map<Character,String> |
ESCAPE_REPLACEMENTS
A mapping from an escaped character in the input stream to the character
that they should be replaced with.
|
Constructor and Description |
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ScannerImpl(StreamReader reader) |
Modifier and Type | Method and Description |
---|---|
boolean |
checkToken(Token.ID... choices)
Check whether the next token is one of the given types.
|
Token |
getToken()
Return the next token, removing it from the queue.
|
Token |
peekToken()
Return the next token, but do not delete it from the queue.
|
public static final Map<Character,String> ESCAPE_REPLACEMENTS
public static final Map<Character,Integer> ESCAPE_CODES
\xHH : escaped 8-bit Unicode character \uHHHH : escaped 16-bit Unicode character \UHHHHHHHH : escaped 32-bit Unicode character
public ScannerImpl(StreamReader reader)
public boolean checkToken(Token.ID... choices)
checkToken
in interface Scanner
choices
- token IDs.true
if the next token can be assigned to a variable
of at least one of the given types. Returns false
if
no more tokens are available.public Token peekToken()
peekToken
in interface Scanner
Scanner.getToken()
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