object LaunchburyInterpreter extends App
Simple call-by-need (i.e. lazy) interpreter for Lambda Calculus based off of John Launchbury's "A Natural Semantics for Lazy Evaluation" Uses the "Barendregt convention": All variable names are globally unique (i.e. you cannot shadow variable names), and renames variables after substitution to maintain this invariant.
- Source
- StateTUsage.scala
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Type Members
- case class Apply(term: Expr, arg: String) extends Expr with Product with Serializable
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sealed abstract
class
Expr extends AnyRef
Simple lambda calculus Abstract Syntax Tree.
Simple lambda calculus Abstract Syntax Tree. Note that that apply applies a let-bound argument to an Expr. This is to make sharing easier, by ensuring that arguments are in the heap.
- case class Lambda(name: String, term: Expr) extends Expr with Product with Serializable
- case class Let(bindings: Map[String, Expr], term: Expr) extends Expr with Product with Serializable
- case class ReduceState(heap: Map[String, Expr], freshVars: Stream[String]) extends Product with Serializable
- case class Var(name: String) extends Expr with Product with Serializable
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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- val S: MonadState[[β$13$]IndexedStateT[[X]X, ReduceState, ReduceState, β$13$], ReduceState]
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def
args: Array[String]
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- @deprecatedOverriding( "args should not be overridden" , "2.11.0" )
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eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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- def evaluate(e: Expr): Expr
- val example1: Lambda
- val example2: Let
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val
executionStart: Long
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def
main(args: Array[String]): Unit
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