public class Optional extends Token
toBeParsed
Constructor and Description |
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Optional(Token opt)
Standard constructor
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Optional(Token opt,
LineToParse l)
Standard constructor with line to parse
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Modifier and Type | Method and Description |
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boolean |
canParse()
can this token be parsed? is the next character
of toBeParsed consistent with the requested parsing task?
no changes to LineToParse are made
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void |
consumeToken()
assuming canParse has been called, consume the next token;
parsed token is stored in LinetoParse object
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java.lang.String |
getEmsg() |
Optional |
klone(LineToParse l)
return copy of 'this'
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void |
parse()
actually parse toBeParsed given requested parsing task
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getTokenString, setLineToParse
public Optional(Token opt)
opt
- -- token that could be optionalpublic Optional(Token opt, LineToParse l)
opt
- -- token that could be optionall
- -- line to parsepublic boolean canParse()
Token
public void consumeToken()
Token
consumeToken
in class Token
public void parse()
Token
public Optional klone(LineToParse l)
Token