X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fhelp%2FC%2Fsec_terms.xml;h=3cae2f84c1866ad13d858e14eb32953176c38c13;hb=84dbeab0a11aed6afb529b884bd796dec644c949;hp=05385f666b3a41ad4267a1977c0e8c8dac9aa4d5;hpb=dd6568cd572eb236f2c3803ce18914731423eae5;p=helm.git
diff --git a/matita/help/C/sec_terms.xml b/matita/help/C/sec_terms.xml
index 05385f666..3cae2f84c 100644
--- a/matita/help/C/sec_terms.xml
+++ b/matita/help/C/sec_terms.xml
@@ -393,6 +393,12 @@
&id; &id; [&id;]â¦
n-ary constructor (binds the n arguments)
+
+
+ |
+ _
+ any remaining constructor (ignoring its arguments)
+
@@ -568,7 +574,7 @@
|
- in match &term;
+ in match &path;
[in
[&id;[: &path;]]â¦
[⢠&path;]]
@@ -584,7 +590,7 @@
&path;
::=
- â©â©any &sterm; whithout occurrences of Set, Prop, CProp, Type, &id;, &uri; and user provided notation; however, % is now an additional production for &sterm;âªâª
+ â©â©any &sterm; without occurrences of Set, Prop, CProp, Type, &id;, &uri; and user provided notation; however, % is now an additional production for &sterm;âªâª
@@ -597,6 +603,26 @@
that can be represented by ?.
+ Warning: the format for a path for a match ⦠with
+ expression is restricted to: match &path;
+ with
+ [
+ _
+ â
+ &path;
+ | â¦
+ |
+ _
+ â
+ &path;
+ ]
+ Its semantics is the following: the n-th
+ "_
+ â
+ &path;" branch is matched against the n-th constructor of the
+ inductive data type. The head λ-abstractions of &path; are matched
+ against the corresponding constructor arguments.
+
For instance, the path
â_,_:?.(? ? % ?)â(? ? ? %)
locates at once the subterms