notation_error_pos.lean:6:6: error: failed to synthesize type class instance for
⊢ has_one string
notation_error_pos.lean:6:6: error: failed to synthesize type class instance for
⊢ has_add string
"a" + 1 : string
notation_error_pos.lean:8:6: error: failed to synthesize type class instance for
⊢ has_one string
notation_error_pos.lean:8:6: error: failed to synthesize type class instance for
⊢ has_add string
"a" + 1 : string
notation_error_pos.lean:10:6: error: failed to synthesize type class instance for
⊢ has_one string
notation_error_pos.lean:10:6: error: failed to synthesize type class instance for
⊢ has_add string
1 + "a" : string
notation_error_pos.lean:12:6: error: failed to synthesize type class instance for
x : string
⊢ has_add string
λ (x : string), x + "b" : string → string