diff options
| author | Jason Gross | 2019-10-26 00:46:14 -0400 |
|---|---|---|
| committer | Jason Gross | 2019-10-29 12:36:49 -0400 |
| commit | c9adfcd356f2563d7c4b3927669a8268f184ec24 (patch) | |
| tree | e0c51e8609f5c89a207549f911d57bbf18d00df5 /doc/sphinx/proof-engine | |
| parent | c59815c860a11948359e96ecc51d566bb5e5d8fb (diff) | |
Fix #9114, assert_succeeds (exact I) solves goal
Diffstat (limited to 'doc/sphinx/proof-engine')
| -rw-r--r-- | doc/sphinx/proof-engine/ltac.rst | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/sphinx/proof-engine/ltac.rst b/doc/sphinx/proof-engine/ltac.rst index aa4e90560b..6efc634087 100644 --- a/doc/sphinx/proof-engine/ltac.rst +++ b/doc/sphinx/proof-engine/ltac.rst @@ -516,7 +516,9 @@ Coq provides a derived tactic to check that a tactic *fails*: .. tacn:: assert_fails @ltac_expr :name: assert_fails - This behaves like :n:`tryif once @ltac_expr then fail 0 tac "succeeds" else idtac`. + This behaves like :tacn:`idtac` if :n:`@ltac_expr` fails, and + behaves like :n:`fail 0 @ltac_expr "succeeds"` if :n:`@ltac_expr` + has at least one success. Checking the success ~~~~~~~~~~~~~~~~~~~~ @@ -528,7 +530,7 @@ success: :name: assert_succeeds This behaves like - :n:`tryif (assert_fails tac) then fail 0 tac "fails" else idtac`. + :n:`tryif (assert_fails @ltac_expr) then fail 0 @ltac_expr "fails" else idtac`. Solving ~~~~~~~ |