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The "--" and "-" operators  RSS feed

 
Ranch Hand
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If I have the following piece of code:
int y = 6;
int z = 4;
int x = y---z ; // There are no spaces in between
System.out.println(x);
Java seems to treat it as x = y-- - z;
Why not as x = y- --z;
 
Gold Digger
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Because of this:
JLS 3.2 Lexical Translations


The longest possible translation is used at each step, even if the result does not ultimately make a correct program while another lexical translation would. Thus the input characters a--b are tokenized (�3.5) as a, --, b, which is not part of any grammatically correct program, even though the tokenization a, -, -, b could be part of a grammatically correct program.


[ July 03, 2002: Message edited by: Valentin Crettaz ]
 
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