lean2/tests/lean/unique_instances.lean

import logic data.prod
open prod

set_option class.unique_instances true set_option pp.implicit true
theorem tst (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) :=
_

set_option class.unique_instances false
theorem tst2 (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) :=
_
-												test(tests/lean): add unique class instance resolution test

											
										
										
											2014-10-30 21:49:11 +00:00
+								import logic data.prod
 								open prod
-												refactor(library): use `[]` binder annotation when declaring instances

											
										
										
											2015-02-24 23:25:02 +00:00
+								set_option class.unique_instances true set_option pp.implicit true
-												test(tests/lean): add unique class instance resolution test

											
										
										
											2014-10-30 21:49:11 +00:00
+								theorem tst (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) :=
 								_
-												refactor(frontends/lean/placeholder_elaborator): reduce coupling between placeholder_elaborator and frontends/lean

											
										
										
											2014-12-19 23:08:21 +00:00
+								set_option class.unique_instances false
-												feat(frontends/lean): try to add definition/theorem as axiom when it fails to be processed

The idea is to avoid a "tsunami" of error messages when a heavily used
theorem breaks in the beginning of the file

											
										
										
											2015-03-13 21:47:21 +00:00
+								theorem tst2 (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) :=
-												test(tests/lean): add unique class instance resolution test

											
										
										
											2014-10-30 21:49:11 +00:00
+								_