Documentation

Lean.Compiler.LCNF.Level

Universe level utilities for the code generator #

Universe level parameter normalizer #

The specializer creates "keys" for a function specialization. The key is an expression containing the function being specialized and the argument values used for the specialization. The key does not contain free variables, and function parameter names are irrelevant due to alpha equivalence. The universe level normalizer ensures the universe parameter names are irrelevant when comparing keys.

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structure Lean.Compiler.LCNF.NormLevelParam.State :
Type

State for the universe level normalizer monad.

  • nextIdx : Nat

    Counter for generating new (normalized) universe parameter names.

  • map : Std.HashMap Lean.Name Lean.Level

    Mapping from existing universe parameter names to the new ones.

  • paramNames : Array Lean.Name

    Parameters that have been normalized.

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    @[reducible, inline]
    abbrev Lean.Compiler.LCNF.NormLevelParam.M (α : Type) :
    Type

    Monad for the universe level normalizer

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      partial def Lean.Compiler.LCNF.NormLevelParam.normLevel (u : Lean.Level) :
      Lean.Compiler.LCNF.NormLevelParam.M Lean.Level

      Normalize universe level parameter names in the given universe level.

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      partial def Lean.Compiler.LCNF.NormLevelParam.normExpr (e : Lean.Expr) :
      Lean.Compiler.LCNF.NormLevelParam.M Lean.Expr

      Normalize universe level parameter names in the given expression.

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      def Lean.Compiler.LCNF.normLevelParams (e : Lean.Expr) :
      Lean.Expr × List Lean.Name

      Normalize universe level parameter names in the given expression. The function also returns the list of universe level parameter names that have been normalized.

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        Universe level collector #

        This module extends support for Code. See Lean.Util.CollectLevelParams.lean

        In the code specializer, we create new auxiliary declarations and the universe level parameter collector is used to setup the new auxiliary declarations.

        See Decl.setLevelParams.

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        @[reducible, inline]
        abbrev Lean.Compiler.LCNF.CollectLevelParams.visitType (type : Lean.Expr) :
        Lean.CollectLevelParams.Visitor
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          def Lean.Compiler.LCNF.CollectLevelParams.visitArg (arg : Lean.Compiler.LCNF.Arg) :
          Lean.CollectLevelParams.Visitor
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            def Lean.Compiler.LCNF.CollectLevelParams.visitArgs (args : Array Lean.Compiler.LCNF.Arg) :
            Lean.CollectLevelParams.Visitor
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              def Lean.Compiler.LCNF.CollectLevelParams.visitLetValue (e : Lean.Compiler.LCNF.LetValue) :
              Lean.CollectLevelParams.Visitor
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                def Lean.Compiler.LCNF.CollectLevelParams.visitParam (p : Lean.Compiler.LCNF.Param) :
                Lean.CollectLevelParams.Visitor
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                  def Lean.Compiler.LCNF.CollectLevelParams.visitParams (ps : Array Lean.Compiler.LCNF.Param) :
                  Lean.CollectLevelParams.Visitor
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                    partial def Lean.Compiler.LCNF.CollectLevelParams.visitAlt (alt : Lean.Compiler.LCNF.Alt) :
                    Lean.CollectLevelParams.Visitor
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                    partial def Lean.Compiler.LCNF.CollectLevelParams.visitAlts (alts : Array Lean.Compiler.LCNF.Alt) :
                    Lean.CollectLevelParams.Visitor
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                    partial def Lean.Compiler.LCNF.CollectLevelParams.visitCode :
                    Lean.Compiler.LCNF.Code → Lean.CollectLevelParams.Visitor
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                    def Lean.Compiler.LCNF.Decl.setLevelParams (decl : Lean.Compiler.LCNF.Decl) :
                    Lean.Compiler.LCNF.Decl

                    Collect universe level parameters collecting in the type, parameters, and value, and then set decl.levelParams with the resulting value.

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