trailing backslashes in strings

[satyr]

$ coffee -s
'\
'
Error: Parse error on line 1: Unexpected '''
...

$ coffee -s
"\
"

.:2
  "\";
  ^^^^
SyntaxError: Unexpected token ILLEGAL
...

$ coffee -s
'''\
'''

.:2
  '\';
  ^^^^
SyntaxError: Unexpected token ILLEGAL
...

$ coffee -s
"""\
"""
Error: missing ", starting on line 2
...

[michaelficarra]

What is

"\
"

supposed to compile to? My guess would be "\n".

edit: Actually, considering that the same syntax is allowed with single quotes, I am going to guess "". Also, the code in lexer.coffee seems to be supporting that idea. And so do the tests.

[ejones]

See #647 ... where you classified these as syntax errors...

[satyr]

See #647 ... where you classified these as syntax errors

Looks like it has regressed since then.

$ git checkout ae55c70
HEAD is now at ae55c70... 647: fixed quote/newline escaping in here documents

$ bin/coffee -pe --no-wrap '"""\"""'
"\"";

Weird, but valid. As for now:

$ git checkout 1.0.1
HEAD is now at c44d9ae... CoffeeScript 1.0.1

$ bin/coffee -bpe '"""\"""'
"\";

[michaelficarra]

This one needs more discussion about expected behaviour. Flagging as notice.

[marchaefner]

With the current changes #3246 and #3256 all cases of the OP should compile to empty strings. Pinging @xixixao...

[xixixao]

Broken on master, let me fix it.