In the grammar, all expressions are statements, but not all
statements are expressions. Some parts of the grammar accept
expressions and not other types of statements, which causes
similar looking code to parse differently due to operator
precedence.
Mostly from Dan0042 (Daniel DeLorme).
Fixes [Bug #16092]
Two advantages:
- higher relevance of the extremely common word "heredocs" which may
help people find this page when searching for "ruby heredocs"
- the anchor link becomes `#label-Here+Documents+-28heredocs-29`, which is
ugly due to the parentheses but includes the word "heredocs" in the URL to
this section
If anyone knows a way to prevent RDoc from turning invalid characters into
ugly and meaningless ASCII codes, I'm listening. I don't want to break existing
anchor links but RDoc should really ignore these characters or turn them into
dashes.
Closes: https://github.com/ruby/ruby/pull/2103
* parse.y (heredoc_identifier): CR in here-document identifier
might or might not result in a syntax error, by the EOL code.
make a syntax error regardless of the EOL code.
* parse.y (heredoc_identifier): quoted here-document identifier
must end within the same line.
the only corner case that here-document identifier can contain a
newline is that the closing qoute is placed at the beginning of
the next line, and has been warned since 2.4.
```ruby
<<"EOS
" # warning: here document identifier ends with a newline
EOS
```
Move general statement about refinements of modules
from example to the top of the document.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* doc/syntax/refinements.rdoc: [DOC] fix typos and grammar
and remove superfluous "for the first time".
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60700 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Backslash goes first in escape sequences, so it must be
"any other character following a backslash is interpreted as ...",
while the doc says "...followed by...".
Author: Marcus Stollsteimer <sto.mar@web.de>
[ruby-core:79418] [Bug #13190]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57517 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
recent changes.
[ci skip] [ruby-core:71466] [Misc #11681] Patch by James Adam
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52629 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
only if a call is made.
* doc/syntax/calling_methods.rdoc: Fix a typo.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52251 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* compile.c (iseq_peephole_optimize): peephole optimization for
branchnil jumps.
* compile.c (iseq_compile_each): generate save navigation operator
code.
* insns.def (branchnil): new opcode to pop the tos and branch if
it is nil.
* parse.y (NEW_QCALL, call_op, parser_yylex): parse token '.?'.
[Feature #11537]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
