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Expand the switch/case documentation

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darcs-hash:20060421083529-ac50b-f287424c0cc9377085b49492453d35a5512cbc90.gz
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axel 2006-04-21 18:35:29 +10:00
parent f59e4a88c6
commit a7f977836a
2 changed files with 35 additions and 3 deletions
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20
doc_src/case.txt
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@ -11,6 +11,22 @@ wildcarded values. The \c case statement is used together with the \c
switch statement in order to determine which block should be
performed.
Each \c case command is given one or more parameter. The first \c case
command with a parameter that matches the string specified in the
switch command will be evaluated. \c case parameters may contain
wildcards. These need to be escaped or quoted in order to avoid
regular wildcard expansion using filenames.
Note that fish does not fall through on case statements. Though the
syntax may look a bit like C switch statements, it behaves more like
the case stamantes of traditional shells.
Also note that command substitutions in a case statement will be
evaluated even if it's body is not taken. This may seem
counterintuitive at first, but it is unavoidable, since it would be
impossible to know if a case command will evaluate to true before all
forms of parameter expansion have been performed for the case command.
\subsection case-example Example
If the variable \$animal contains the name of an animal, the following
@ -27,9 +43,11 @@ switch $animal
echo bird
case shark trout stingray
echo fish
case '*'
echo I have no idea what a $animal is
end
</pre>
</p>
<p>
If the above code was run with \$animal set to \c whale, the output would be \c mammal.
If the above code was run with \c \$animal set to \c whale, the output would be \c mammal.
</p>

18
doc_src/switch.txt
View file

@ -8,7 +8,19 @@
The \c switch statement is used to perform one of several blocks of
commands depending on whether a specified value equals one of several
wildcarded values.
wildcarded values. The \c case statement is used together with the \c
switch statement in order to determine which block should be
performed.
Each \c case command is given one or more parameter. The first \c case
command with a parameter that matches the string specified in the
switch command will be evaluated. \c case parameters may contain
wildcards. These need to be escaped or quoted in order to avoid
regular wildcard expansion using filenames.
Note that fish does not fall through on case statements. Though the
syntax may look a bit like C switch statements, it behaves more like
the case stamantes of traditional shells.
\subsection switch-example Example
@ -26,12 +38,14 @@ switch $animal
echo bird
case shark trout stingray
echo fish
case '*'
echo I have no idea what a $animal is
end
</pre>
</p>
<p>
If the above code was run with \$animal set to \c whale, the output
If the above code was run with \c \$animal set to \c whale, the output
would be \c mammal.
</p>