diff options
| author |  Rustan Leino <leino@microsoft.com> | 2012-10-04 00:02:43 -0700 |
|---|---|---|
| committer | Rustan Leino <leino@microsoft.com> | 2012-10-04 00:02:43 -0700 |
| commit | 86da04e8be269d13874191c81cee0e2110d6373e (patch) | |
| tree | 3e179711e6f621ff10bbea22fbcaa9f0e9d62e47 /Test/dafny0/ParseErrors.dfy | |
| parent | 0cf1c052a1b3f89384a6c859fc8680851b6edce0 (diff) | |
| parent | 17a14997cbcdad8bb0a435cf48dfb783ea21f3ac (diff) | |
Merge
Diffstat (limited to 'Test/dafny0/ParseErrors.dfy')
| -rw-r--r-- | Test/dafny0/ParseErrors.dfy | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/Test/dafny0/ParseErrors.dfy b/Test/dafny0/ParseErrors.dfy index 41df50eb..9a3cc18b 100644 --- a/Test/dafny0/ParseErrors.dfy +++ b/Test/dafny0/ParseErrors.dfy @@ -18,3 +18,61 @@ method TestChaining1<T>(s: set<T>, t: set<T>, u: set<T>, x: T, SuperSet: set<set ensures x in s == t; // error: 'in' is not chaining
{
}
+
+// ---------------------- calc statements -----------------------------------
+
+method TestCalc()
+{
+ calc {} // OK, empty calculations are allowed
+ calc {
+ 2 + 3; // OK, single-line calculations are allowed
+ }
+ calc {
+ 2 + 3;
+ calc { // OK: a calc statement is allowed as a sub-hint
+ 2;
+ 1 + 1;
+ }
+ calc {
+ 3;
+ 1 + 2;
+ }
+ { assert true; } // OK: multiple subhints are allowed between two lines
+ 1 + 1 + 1 + 2;
+ { assert 1 + 1 + 1 == 3; }
+ { assert true; }
+ 3 + 2;
+ }
+ calc != { // error: != is not allowed as the main operator of a calculation
+ 2 + 3;
+ 4;
+ }
+ calc { // OK, these operators are compatible
+ 2 + 3;
+ > 4;
+ >= 2 + 2;
+ }
+ calc < { // OK, these operators are compatible
+ 2 + 3;
+ == 5;
+ <= 3 + 3;
+ }
+ calc < { // error: cannot mix < and >= or >
+ 2 + 3;
+ >= 5;
+ > 2 + 2;
+ 6;
+ }
+ calc >= { // error: cannot mix >= and <= or !=
+ 2 + 3;
+ <= 5;
+ != 2 + 2;
+ 3;
+ }
+ calc { // error: cannot have more than one != per calc
+ 2 + 3;
+ != 4;
+ != 1 + 2;
+ 3;
+ }
+}
|