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operator methods. * doc/syntax/methods.rdoc (Return Values): Added note that assignment methods ignore return values. * doc/syntax/precedence.rdoc: Added document describing precedence. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38825 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
60 lines
909 B
Text
60 lines
909 B
Text
= Precedence
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From highest to lowest, this is the precedence table for ruby. High precedence
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operations happen before low precedence operations.
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!, ~, unary +
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**
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unary -
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*, /, %
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+, -
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<<, >>
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&
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|, ^
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>, >=, <, <=
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<=>, ==, ===, !=, =~, !~
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&&
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||
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.., ...
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?, :
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modifier-rescue
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=, +=, -=, etc.
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defined?
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not
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or, and
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modifier-if, modifier-unless, modifier-while, modifier-until
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{ } blocks
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Unary <code>+</code> and unary <code>-</code> are for <code>+1</code>,
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<code>-1</code> or <code>-(a + b)</code>.
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Modifier-if, modifier-unless, etc. are for the modifier versions of those
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keywords. For example, this is a modifier-unless expression:
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a += 1 unless a.zero?
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<code>{ ... }</code> blocks have priority below all listed operations, but
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<code>do ... end</code> blocks have lower priority.
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All other words in the precedence table above are keywords.
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