[Lilypond-auto] Issue 3554 in lilypond: Patch: Avoid empty grammar rules using @$ for getting a source location

[lilypond]

Status: Started
Owner: address@hidden
Labels: Type-Enhancement Patch-new

New issue 3554 by address@hidden: Patch: Avoid empty grammar rules using @$  
for getting a source location
http://code.google.com/p/lilypond/issues/detail?id=3554

Avoid empty grammar rules using @$ for getting a source location

Several rules use @$ for getting the source position from an empty
rule, but Bison does not even provide a source position for empty
rules.

This patch fixes most cases by letting different non-empty rules
assign the respective source positions.  The case of #{ #} cannot be
fixed in that manner since there is not a single token providing a
source position in the whole production.  Fixing this particular case
would require a different technique.

http://codereview.appspot.com/13328055

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