diff options
Diffstat (limited to 'src/content/chapter2_flow_control/lesson07_alternative_patterns/text.html')
| -rw-r--r-- | src/content/chapter2_flow_control/lesson07_alternative_patterns/text.html | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/content/chapter2_flow_control/lesson07_alternative_patterns/text.html b/src/content/chapter2_flow_control/lesson07_alternative_patterns/text.html new file mode 100644 index 0000000..10ad731 --- /dev/null +++ b/src/content/chapter2_flow_control/lesson07_alternative_patterns/text.html @@ -0,0 +1,17 @@ +<p> + Alternative patterns can be given for a case clause using the + <code>|</code> operator. If any of the patterns match then the clause matches. +</p> +<p> + When matching on multiple subjects there must be the same number of patterns + as there are subjects. Try removing one of the <code>_,</code> sub-patterns to + see the compile time error that is returned. +</p> +<p> + If a pattern defines a variable then all of the alternative patterns for that + clause must also define a variable with the same name and same type. +</p> +<p> + Currently it is not possible to have nested alternative patterns, so the + pattern <code>[1 | 2 | 3]</code> is not valid. +</p> |