9402c307fe
This PR reorganizes the import hierarchy so that `Init.Data.String.Basic` can import `Init.Data.UInt.Bitwise` and `Init.Data.Array.Lemmas`.
86 lines
2.5 KiB
Text
86 lines
2.5 KiB
Text
/-
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Copyright (c) 2018 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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module
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prelude
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public import Init.Data.Nat.Basic
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public import Init.Data.String.Bootstrap
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public section
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namespace System
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namespace Platform
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/--
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Checks whether the current platform is Windows.
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-/
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@[extern "lean_system_platform_windows"] opaque getIsWindows : Unit → Bool
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/--
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Checks whether the current platform is macOS.
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-/
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@[extern "lean_system_platform_osx"] opaque getIsOSX : Unit → Bool
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/--
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Checks whether the current platform is [Emscripten](https://emscripten.org/).
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-/
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@[extern "lean_system_platform_emscripten"] opaque getIsEmscripten : Unit → Bool
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/--
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Is the current platform Windows?
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-/
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def isWindows : Bool := getIsWindows ()
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/--
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Is the current platform macOS?
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-/
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def isOSX : Bool := getIsOSX ()
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/--
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Is the current platform [Emscripten](https://emscripten.org/)?
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-/
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def isEmscripten : Bool := getIsEmscripten ()
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/--
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Gets the LLVM target triple of the current platform, or `""` if this was missing when Lean was
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compiled.
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-/
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@[extern "lean_system_platform_target"] opaque getTarget : Unit → String
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/--
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The LLVM target triple of the current platform. Empty if missing when Lean was compiled.
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-/
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def target : String := getTarget ()
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@[simp]
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theorem numBits_pos : 0 < numBits := by
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cases numBits_eq <;> next h => simp [h]
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@[simp]
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theorem le_numBits : 32 ≤ numBits := by
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cases numBits_eq <;> next h => simp [h]
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@[simp]
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theorem numBits_le : numBits ≤ 64 := by
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cases numBits_eq <;> next h => simp [h]
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@[simp] theorem eight_le_numBits : 8 ≤ System.Platform.numBits := by
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cases System.Platform.numBits_eq <;> simp_all
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@[simp] theorem sixteen_le_numBits : 16 ≤ System.Platform.numBits := by
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cases System.Platform.numBits_eq <;> simp_all
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@[simp] theorem eight_dvd_numBits : 8 ∣ System.Platform.numBits :=
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numBits_eq.elim (fun h => ⟨4, h ▸ rfl⟩) (fun h => ⟨8, h ▸ rfl⟩)
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@[simp] theorem System.Platform.sixteen_dvd_numBits : 16 ∣ System.Platform.numBits :=
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numBits_eq.elim (fun h => ⟨2, h ▸ rfl⟩) (fun h => ⟨4, h ▸ rfl⟩)
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@[simp] theorem System.Platform.dvd_numBits : 32 ∣ System.Platform.numBits :=
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numBits_eq.elim (fun h => ⟨1, by simp [h]⟩) (fun h => ⟨2, h ▸ rfl⟩)
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@[simp] theorem System.Platform.numBits_dvd : System.Platform.numBits ∣ 64 :=
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numBits_eq.elim (fun h => ⟨2, h ▸ rfl⟩) (fun h => ⟨1, by simp [h]⟩)
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instance : NeZero System.Platform.numBits where
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out := Nat.ne_zero_of_lt System.Platform.numBits_pos
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end Platform
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end System
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