a2abbdbf9a
This is just a draft. ``` for f in `find . -name '*.lean'`; do echo $f; gsed "/^import/s/\b\(.\)/\u\1/g" $f > tmp; gsed "/^Import/s/Import/import/g" tmp > $f; done ```
28 lines
992 B
Text
28 lines
992 B
Text
/-
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Copyright (c) 2019 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Leonardo de Moura
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-/
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prelude
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import Init.Lean.Environment
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import Init.Lean.Attributes
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namespace Lean
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def mkNeverExtractAttr : IO TagAttribute :=
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registerTagAttribute `neverExtract "instruct the compiler that function applications using the tagged declaration should not be extracted when they are closed terms, nor common subexpression should be performed. This is useful for declarations that have implicit effects."
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@[init mkNeverExtractAttr]
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constant neverExtractAttr : TagAttribute := default _
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private partial def hasNeverExtractAttributeAux (env : Environment) : Name → Bool
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| n =>
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neverExtractAttr.hasTag env n
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||
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(n.isInternal && hasNeverExtractAttributeAux n.getPrefix)
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@[export lean_has_never_extract_attribute]
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def hasNeverExtractAttribute (env : Environment) (n : Name) : Bool :=
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hasNeverExtractAttributeAux env n
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end Lean
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