107 lines
3.8 KiB
VB.net
107 lines
3.8 KiB
VB.net
#Region "Microsoft.VisualBasic::180e6152389a6722d4376ae0bf439787, R#\System\LambdaCompiler.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Code Statistics:
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' Total Lines: 52
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' Code Lines: 41 (78.85%)
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' Comment Lines: 1 (1.92%)
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' - Xml Docs: 0.00%
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'
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' Blank Lines: 10 (19.23%)
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' File Size: 2.41 KB
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' Module LambdaCompiler
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'
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' Function: Compile, CreateExpression
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Runtime.CompilerServices
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Imports Microsoft.VisualBasic.ComponentModel.Collection
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Imports SMRUCC.Rsharp.Interpreter.ExecuteEngine
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Imports SMRUCC.Rsharp.Interpreter.ExecuteEngine.ExpressionSymbols.Closure
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Imports SMRUCC.Rsharp.Interpreter.ExecuteEngine.ExpressionSymbols.DataSets
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Imports SMRUCC.Rsharp.Interpreter.ExecuteEngine.ExpressionSymbols.Operators
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Namespace Development
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Public Module LambdaCompiler
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<Extension>
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Public Function Compile(lambda As DeclareLambdaFunction) As Expressions.LambdaExpression
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Dim parameters As Dictionary(Of String, Expressions.ParameterExpression) = lambda.parameterNames _
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.ToDictionary(Function(name) name,
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Function(name)
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Return Expressions.Expression.Parameter(GetType(Double), name)
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End Function)
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Dim body As Expressions.Expression = CreateExpression(parameters, lambda.closure)
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Dim run As Expressions.LambdaExpression = Expressions.Expression.Lambda(body, parameters.Values.ToArray)
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Return run
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End Function
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<Extension>
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Private Function CreateExpression(parameters As Dictionary(Of String, Expressions.ParameterExpression), model As Expression) As Expressions.Expression
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Select Case model.GetType
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Case GetType(Literal)
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Dim literal As Literal = DirectCast(model, Literal)
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Dim constVal As Object = literal.Evaluate(Nothing)
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Dim type As Type = If(constVal Is Nothing, GetType(Object), constVal.GetType)
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Return Expressions.Expression.Constant(constVal, type)
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Case GetType(SymbolReference)
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Dim ref As SymbolReference = model
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If parameters.ContainsKey(ref.symbol) Then
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Return parameters(ref.symbol)
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Else
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' 引用的是环境中的其他变量
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End If
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Case GetType(BinaryExpression)
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Dim bin As BinaryExpression = DirectCast(model, BinaryExpression)
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Case Else
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End Select
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Throw New NotImplementedException(model.GetType().FullName)
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End Function
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End Module
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End Namespace
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