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Diffstat (limited to 'doc_src/case.txt')
| -rw-r--r-- | doc_src/case.txt | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/doc_src/case.txt b/doc_src/case.txt index 209e87de..714d7582 100644 --- a/doc_src/case.txt +++ b/doc_src/case.txt @@ -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> |