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= Precedence
From highest to lowest, this is the precedence table for ruby. High precedence
operations happen before low precedence operations.
!, ~, unary +
**
unary -
*, /, %
+, -
<<, >>
&
|, ^
>, >=, <, <=
<=>, ==, ===, !=, =~, !~
&&
||
.., ...
?, :
modifier-rescue
=, +=, -=, etc.
defined?
not
or, and
modifier-if, modifier-unless, modifier-while, modifier-until
{ } blocks
Unary <code>+</code> and unary <code>-</code> are for <code>+1</code>,
<code>-1</code> or <code>-(a + b)</code>.
Modifier-if, modifier-unless, etc. are for the modifier versions of those
keywords. For example, this is a modifier-unless statement:
a += 1 unless a.zero?
Note that <code>(a if b rescue c)</code> is parsed as <code>((a if b) rescue
c)</code> due to reasons not related to precedence. See {modifier
statements}[control_expressions.rdoc#label-Modifier+Statements].
<code>{ ... }</code> blocks have priority below all listed operations, but
<code>do ... end</code> blocks have lower priority.
All other words in the precedence table above are keywords.
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