5f4e6a86d5
This PR updates the formatting of, and adds explanations for, "unknown identifier" errors as well as "failed to infer type" errors for binders and definitions. It attempts to ameliorate some of the confusion encountered in #1592 by modifying the wording of the "header is elaborated before body is processed" note and adding further discussion and examples of this behavior in the corresponding error explanation.
169 lines
3.8 KiB
Text
169 lines
3.8 KiB
Text
/-!
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# Duplicate definition names in `mutual` blocks
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https://github.com/leanprover/lean4/issues/6694
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Definitions with conflicting names in `mutual` blocks should report errors rather than silently
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failing or producing invalid entries in the environment.
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-/
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/--
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error: 'mutual' block contains two declarations of the same name 'foo'
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---
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error: 'mutual' block contains two declarations of the same name 'foo'
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-/
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#guard_msgs in
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mutual
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def foo := ()
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def foo := ()
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end
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/-- error: Unknown identifier `foo` -/
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#guard_msgs in #check foo
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/--
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error: 'mutual' block contains two declarations of the same name 'foo'
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---
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error: 'mutual' block contains two declarations of the same name 'foo'
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-/
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#guard_msgs in
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mutual
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private def foo := ()
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def foo := ()
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end
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/-- error: Unknown identifier `foo` -/
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#guard_msgs in #check foo
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/--
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error: 'mutual' block contains two declarations of the same name 'y.z'
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---
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error: 'mutual' block contains two declarations of the same name 'y.z'
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-/
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#guard_msgs in
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mutual
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def y :=
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let rec z := 3
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z + 2
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def y.z := 42
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end
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/-- error: Unknown identifier `y` -/
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#guard_msgs in #check y
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/-- error: Unknown identifier `y.z` -/
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#guard_msgs in #check y.z
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/--
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error: 'mutual' block contains two declarations of the same name 'a.b'
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---
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error: 'mutual' block contains two declarations of the same name 'a.b'
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-/
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#guard_msgs in
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mutual
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def a :=
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b + 2
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where b := 4
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def a.b := 42
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end
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/-- error: Unknown identifier `a` -/
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#guard_msgs in #check a
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/-- error: Unknown identifier `a.b` -/
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#guard_msgs in #check a.b
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/--
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error: cannot define an inductive type and a constructor with the same name 'Bar.foo'
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---
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error: cannot define an inductive type and a constructor with the same name 'Bar.foo'
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-/
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#guard_msgs in
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mutual
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inductive Bar
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| foo : Bar
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inductive Bar.foo
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| mk : Bar.foo
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end
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/-- error: Unknown identifier `Bar` -/
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#guard_msgs in #check Bar
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/-- error: Unknown identifier `Bar.foo` -/
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#guard_msgs in #check Bar.foo
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/-- error: Unknown identifier `Bar.foo.mk` -/
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#guard_msgs in #check Bar.foo.mk
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/--
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error: cannot define multiple inductive types with the same name 'Private'
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---
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error: cannot define multiple inductive types with the same name 'Private'
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-/
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#guard_msgs in
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mutual
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private inductive Private
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| mk
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inductive Private
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| mk
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end
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/-- error: Unknown identifier `Private` -/
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#guard_msgs in #check Private
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/-- error: Unknown identifier `Private.mk` -/
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#guard_msgs in #check Private.mk
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/--
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error: cannot define an inductive type and a constructor with the same name 'PrivateConstructor.priv'
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---
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error: cannot define an inductive type and a constructor with the same name 'PrivateConstructor.priv'
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-/
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#guard_msgs in
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mutual
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inductive PrivateConstructor
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| private priv
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inductive PrivateConstructor.priv
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| mk
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end
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/-- error: Unknown identifier `PrivateConstructor` -/
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#guard_msgs in #check PrivateConstructor
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/-- error: Unknown identifier `PrivateConstructor.priv` -/
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#guard_msgs in #check PrivateConstructor.priv
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/--
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error: cannot define multiple constructors with the same name 'Baz.foo.mk'
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---
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error: cannot define multiple constructors with the same name 'Baz.foo.mk'
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-/
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#guard_msgs in
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mutual
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inductive Baz
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| foo.mk : Baz
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inductive Baz.foo
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| mk : Baz.foo
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end
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/-- error: Unknown identifier `Baz` -/
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#guard_msgs in #check Baz
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/-- error: Unknown identifier `Baz.foo` -/
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#guard_msgs in #check Baz.foo
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/-- error: Unknown identifier `Baz.foo.mk` -/
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#guard_msgs in #check Baz.foo.mk
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/--
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error: cannot define multiple inductive types with the same name 'Foo'
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---
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error: cannot define multiple inductive types with the same name 'Foo'
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-/
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#guard_msgs in
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mutual
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inductive Foo
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| bar : Foo
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inductive Foo
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| bar : Foo
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| foo : Foo → Foo
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end
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/-- error: Unknown identifier `Foo` -/
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#guard_msgs in #check Foo
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/-- error: Unknown identifier `Foo.bar` -/
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#guard_msgs in #check Foo.bar
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/-- error: Unknown identifier `Foo.foo` -/
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#guard_msgs in #check Foo.foo
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