Exceptions: Difference between revisions

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@@ Line 1,610: / Line 1,610: @@
 An else section on a catch is optional. As of 0.7, you can also use else if on a catch.
-=== shortened catch ===
+=== exception variable ===
-A catch can be shortened by using a single expression that does not start with a variable name. This uses the implicit _err exception variable. Prior to 0.7, the implicit exception variable was .err.
+An exception variable may be specified, or you can simply use the implicit variable, which is _err. Prior to 0.7, the implicit exception variable was .err.
-A shortened catch does not allow an else section (action for no exception).
 <syntaxhighlight lang="langur">100 / 0
-catch if _err["cat"] == "math" {
+catch {
+    if _err["cat"] == "math" {
-    # change result
+        # change result
-} else {
-    throw
+    } else {
+        throw
+    }
 }</syntaxhighlight>
-<syntaxhighlight lang="langur">val .safediv = f { .x / .y ; catch 0 }
+<syntaxhighlight lang="langur">val .safediv = f { .x / .y ; catch { 0 } }
 .safediv(7, 7) # 1
 .safediv(7, 0) # 0</syntaxhighlight>