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1252 lines (1201 loc) · 85.1 KB
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using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using CodeGeneration.Roslyn;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
using Microsoft.CodeAnalysis.CSharp.Syntax;
namespace LanguageExt.CodeGen
{
/// <summary>
/// Reader Generator
/// </summary>
public class ReaderGenerator : ICodeGenerator
{
readonly string envType;
readonly object envTypeConst;
readonly string ctorName;
readonly string failName;
/// <summary>
/// Provides a With function for record types
/// </summary>
public ReaderGenerator(AttributeData attributeData)
{
envTypeConst = attributeData.ConstructorArguments[0].Value;
envType = attributeData.ConstructorArguments[0].Value.ToString();
ctorName = attributeData.ConstructorArguments[1].Value?.ToString() ?? "Return";
failName = attributeData.ConstructorArguments[2].Value?.ToString() ?? "Fail";
}
public Task<SyntaxList<MemberDeclarationSyntax>> GenerateAsync(
TransformationContext context,
IProgress<Diagnostic> progress,
CancellationToken cancellationToken)
{
var results = SyntaxFactory.List<MemberDeclarationSyntax>();
if (context.ProcessingNode is StructDeclarationSyntax applyToStruct &&
applyToStruct.TypeParameterList != null &&
applyToStruct.TypeParameterList.Parameters.Count >= 1)
{
var members = CodeGenUtil.MemberNames(applyToStruct.Members);
// Apply a suffix to the name of a copy of the struct.
var partialStruct = StructDeclaration($"{applyToStruct.Identifier}")
.WithModifiers(applyToStruct.Modifiers)
.WithTypeParameterList(applyToStruct.TypeParameterList);
var structName = applyToStruct.Identifier;
var genA = applyToStruct.TypeParameterList.Parameters.Last().ToString();
var genB = CodeGenUtil.NextGenName(genA);
var genC = CodeGenUtil.NextGenName(genB);
var structA = ParseTypeName($"{applyToStruct.Identifier}<{applyToStruct.TypeParameterList.Parameters}>");
var structB = CodeGenUtil.MakeGenericStruct(applyToStruct, genB);
var structC = CodeGenUtil.MakeGenericStruct(applyToStruct, genC);
var structEnv = CodeGenUtil.MakeGenericStruct(applyToStruct, envType);
var structUnit = CodeGenUtil.MakeGenericStruct(applyToStruct, "LanguageExt.Unit");
var envTypeSyntax = ParseTypeName(envType);
var compType = ParseTypeName($"LanguageExt.Reader<{envType}, {applyToStruct.TypeParameterList.Parameters.Last()}>");
const string compName = "computation";
// Internal field used to store the reader monad
var compField = FieldDeclaration(
VariableDeclaration(compType)
.WithVariables(
SingletonSeparatedList<VariableDeclaratorSyntax>(
VariableDeclarator(
Identifier(compName)))))
.WithModifiers(TokenList(new[] { Token(SyntaxKind.ReadOnlyKeyword) }));
// Constructor
var ctor = ConstructorDeclaration(structName)
.WithModifiers(TokenList(new[] { Token(SyntaxKind.InternalKeyword) }))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(Identifier("comp"))
.WithType(compType))))
.WithExpressionBody(
ArrowExpressionClause(
AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
IdentifierName(compName),
IdentifierName("comp"))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Return :: A -> MA
var returnMethod = MethodDeclaration(
structA,
Identifier(ctorName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("value"))
.WithType(
IdentifierName(genA)))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("Prelude"),
GenericName(
Identifier("Reader"))
.WithTypeArgumentList(
TypeArgumentList(
SeparatedList<TypeSyntax>(
new SyntaxNodeOrToken[]{
envTypeSyntax,
Token(SyntaxKind.CommaToken),
IdentifierName(genA)})))))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("value")))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Fail :: string -> MA
var failMethod1 = MethodDeclaration(
structA,
Identifier(failName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("message"))
.WithType(
PredefinedType(
Token(SyntaxKind.StringKeyword))))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("Prelude"),
GenericName(
Identifier("ReaderFail"))
.WithTypeArgumentList(
TypeArgumentList(
SeparatedList<TypeSyntax>(
new SyntaxNodeOrToken[]{
envTypeSyntax,
Token(SyntaxKind.CommaToken),
IdentifierName(genA)})))))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("message")))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Fail :: Exception -> MA
var failMethod2 = MethodDeclaration(
structA,
Identifier(failName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(Parameter(Identifier("exception")).WithType(CodeGenUtil.ExceptionType))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("Prelude"),
GenericName(
Identifier("ReaderFail"))
.WithTypeArgumentList(
TypeArgumentList(
SeparatedList<TypeSyntax>(
new SyntaxNodeOrToken[]{
envTypeSyntax,
Token(SyntaxKind.CommaToken),
IdentifierName(genA)})))))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("exception")))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Fail :: String -> Exception -> MA
var failMethod3 = MethodDeclaration(
structA,
Identifier(failName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithParameterList(
ParameterList(
SeparatedList<ParameterSyntax>(
new SyntaxNodeOrToken[]{
Parameter(
Identifier("message"))
.WithType(
PredefinedType(
Token(SyntaxKind.StringKeyword))),
Token(SyntaxKind.CommaToken),
Parameter(
Identifier("exception"))
.WithType(CodeGenUtil.ExceptionType)})))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("Prelude"),
GenericName(
Identifier("ReaderFail"))
.WithTypeArgumentList(
TypeArgumentList(
SeparatedList<TypeSyntax>(
new SyntaxNodeOrToken[]{
envTypeSyntax,
Token(SyntaxKind.CommaToken),
IdentifierName(genA)})))))
.WithArgumentList(
ArgumentList(
SeparatedList<ArgumentSyntax>(
new SyntaxNodeOrToken[]{
Argument(
IdentifierName("message")),
Token(SyntaxKind.CommaToken),
Argument(
IdentifierName("exception"))})))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// SelectMany :: MA -> (A -> MB) -> (A -> B -> C) -> MC
var selectManyMethod2 =
MethodDeclaration(structC, Identifier("SelectMany"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SeparatedList<TypeParameterSyntax>(
new SyntaxNodeOrToken[]{
TypeParameter(
Identifier(genB)),
Token(SyntaxKind.CommaToken),
TypeParameter(
Identifier(genC))})))
.WithParameterList(
ParameterList(
SeparatedList<ParameterSyntax>(
new SyntaxNodeOrToken[]{
Parameter(
Identifier("bind"))
.WithType(CodeGenUtil.FuncType(genA, structB)),
Token(SyntaxKind.CommaToken),
Parameter(
Identifier("project"))
.WithType(
CodeGenUtil.FuncType(genA, genB, genC)
)})))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
IdentifierName("Bind"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
SimpleLambdaExpression(
Parameter(
Identifier("a")),
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
IdentifierName("bind"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("a"))))),
IdentifierName("Map")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
SimpleLambdaExpression(
Parameter(
Identifier("b")),
InvocationExpression(
IdentifierName("project"))
.WithArgumentList(
ArgumentList(
SeparatedList<ArgumentSyntax>(
new SyntaxNodeOrToken[]{
Argument(
IdentifierName("a")),
Token(SyntaxKind.CommaToken),
Argument(
IdentifierName("b"))})))))))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Run :: MA -> Env -> TryOption A
var runMethod = MethodDeclaration(
GenericName(
Identifier("ReaderResult"))
.WithTypeArgumentList(
TypeArgumentList(
SingletonSeparatedList<TypeSyntax>(
IdentifierName(genA)))),
Identifier("Run"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("env"))
.WithType(
IdentifierName(envType)))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("Run")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("env")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Do :: MA -> (A -> Unit) -> MA
var doMethod = MethodDeclaration(
structA,
Identifier("Do"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(CodeGenUtil.ActionType(genA)))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("Do")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f")))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Strict :: MA -> MA
var strictMethod = MethodDeclaration(structA, Identifier("Strict"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("Strict")))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// ToSeq :: MA -> Seq A
var toSeqMethod = MethodDeclaration(
GenericName(
Identifier("Seq"))
.WithTypeArgumentList(
TypeArgumentList(
SingletonSeparatedList<TypeSyntax>(
IdentifierName(genA)))),
Identifier("ToSeq"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("env"))
.WithType(
IdentifierName(envType)))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("ToSeq")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("env")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Iter :: MA -> (A -> void) -> Unit
var iterMethod = MethodDeclaration(
structUnit,
Identifier("Iter"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(CodeGenUtil.ActionType(genA)))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structUnit)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("Iter")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f")))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
var foldMethod = MethodDeclaration(
CodeGenUtil.FuncType(envType, "S"),
Identifier("Fold"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SingletonSeparatedList<TypeParameterSyntax>(
TypeParameter(
Identifier("S")))))
.WithParameterList(
ParameterList(
SeparatedList<ParameterSyntax>(
new SyntaxNodeOrToken[]{
Parameter(
Identifier("state"))
.WithType(
IdentifierName("S")),
Token(SyntaxKind.CommaToken),
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType("S", genA, "S")
)})))
.WithBody(
Block(
LocalDeclarationStatement(
VariableDeclaration(
IdentifierName("var"))
.WithVariables(
SingletonSeparatedList<VariableDeclaratorSyntax>(
VariableDeclarator(
Identifier("self"))
.WithInitializer(
EqualsValueClause(
ThisExpression()))))),
ReturnStatement(
SimpleLambdaExpression(
Parameter(
Identifier("env")),
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("self"),
IdentifierName(compName)),
IdentifierName("Fold")))
.WithArgumentList(
ArgumentList(
SeparatedList<ArgumentSyntax>(
new SyntaxNodeOrToken[]{
Argument(
IdentifierName("state")),
Token(SyntaxKind.CommaToken),
Argument(
IdentifierName("f"))}))),
IdentifierName("Run")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("env"))))),
IdentifierName("IfFail")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("state")))))))));
var forAllMethod = MethodDeclaration(
CodeGenUtil.FuncType(envTypeSyntax, PredefinedType(Token(SyntaxKind.BoolKeyword))),
Identifier("ForAll"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SeparatedList<ParameterSyntax>(
new SyntaxNodeOrToken[]{
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, PredefinedType(Token(SyntaxKind.BoolKeyword)))
)})))
.WithBody(
Block(
LocalDeclarationStatement(
VariableDeclaration(
IdentifierName("var"))
.WithVariables(
SingletonSeparatedList<VariableDeclaratorSyntax>(
VariableDeclarator(
Identifier("self"))
.WithInitializer(
EqualsValueClause(
ThisExpression()))))),
ReturnStatement(
SimpleLambdaExpression(
Parameter(
Identifier("env")),
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("self"),
IdentifierName(compName)),
IdentifierName("ForAll")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f"))))),
IdentifierName("Run")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("env"))))),
IdentifierName("IfFail")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
LiteralExpression(
SyntaxKind.FalseLiteralExpression)))))))));
var existsMethod = MethodDeclaration(
CodeGenUtil.FuncType(envTypeSyntax, PredefinedType(Token(SyntaxKind.BoolKeyword))),
Identifier("Exists"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SeparatedList<ParameterSyntax>(
new SyntaxNodeOrToken[]{
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, PredefinedType(Token(SyntaxKind.BoolKeyword)))
)})))
.WithBody(
Block(
LocalDeclarationStatement(
VariableDeclaration(
IdentifierName("var"))
.WithVariables(
SingletonSeparatedList<VariableDeclaratorSyntax>(
VariableDeclarator(
Identifier("self"))
.WithInitializer(
EqualsValueClause(
ThisExpression()))))),
ReturnStatement(
SimpleLambdaExpression(
Parameter(
Identifier("env")),
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName("self"),
IdentifierName(compName)),
IdentifierName("Exists")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f"))))),
IdentifierName("Run")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("env"))))),
IdentifierName("IfFail")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
LiteralExpression(
SyntaxKind.FalseLiteralExpression)))))))));
var localMethod = MethodDeclaration(structA, Identifier("Local"))
.WithModifiers(TokenList(Token(SyntaxKind.PublicKeyword)))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(Identifier("f"))
.WithType(CodeGenUtil.FuncType(envTypeSyntax, envTypeSyntax)))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structA)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(CodeGenUtil.PreludeMember(IdentifierName("local")))
.WithArgumentList(
ArgumentList(
SeparatedList<ArgumentSyntax>(
new SyntaxNodeOrToken[]{
Argument(
IdentifierName(compName)),
Token(SyntaxKind.CommaToken),
Argument(
IdentifierName("f"))})))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// [name] :: MA -> (A -> B) -> MB
var mapMethod =
MethodDeclaration(structB, Identifier("Map"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SingletonSeparatedList<TypeParameterSyntax>(
TypeParameter(
Identifier(genB)))))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, genB)
))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
IdentifierName("Bind"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
SimpleLambdaExpression(
Parameter(
Identifier("a")),
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
structB,
IdentifierName(ctorName)))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
IdentifierName("f"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("a"))))))))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
var selectMethod =
MethodDeclaration(structB, Identifier("Select"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SingletonSeparatedList<TypeParameterSyntax>(
TypeParameter(
Identifier(genB)))))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, genB)
))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
IdentifierName("Map"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Bind :: MA -> (A -> MB) -> MB
var bindMethod =
MethodDeclaration(structB, Identifier("Bind"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SingletonSeparatedList<TypeParameterSyntax>(
TypeParameter(
Identifier(genB)))))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, structB)))))
.WithExpressionBody(
ArrowExpressionClause(
ObjectCreationExpression(structB)
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(compName),
IdentifierName("Bind")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
SimpleLambdaExpression(
Parameter(
Identifier("a")),
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
IdentifierName("f"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("a"))))),
IdentifierName(compName)))))))))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// SelectMany :: MA -> (A -> MB) -> MB
var selectManyMethod1 =
MethodDeclaration(structB, Identifier("SelectMany"))
.WithModifiers(
TokenList(
Token(SyntaxKind.PublicKeyword)))
.WithTypeParameterList(
TypeParameterList(
SingletonSeparatedList<TypeParameterSyntax>(
TypeParameter(
Identifier(genB)))))
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("f"))
.WithType(
CodeGenUtil.FuncType(genA, structB)))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
IdentifierName("Bind"))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("f")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
var memberDecls = new MemberDeclarationSyntax[]{
compField,
ctor,
CodeGenUtil.NullIfExists(members, returnMethod),
CodeGenUtil.NullIfExists(members, failMethod1),
CodeGenUtil.NullIfExists(members, failMethod2),
CodeGenUtil.NullIfExists(members, failMethod3),
CodeGenUtil.NullIfExists(members, mapMethod),
CodeGenUtil.NullIfExists(members, selectMethod),
CodeGenUtil.NullIfExists(members, bindMethod),
CodeGenUtil.NullIfExists(members, selectManyMethod1),
CodeGenUtil.NullIfExists(members, selectManyMethod2),
CodeGenUtil.NullIfExists(members, runMethod),
CodeGenUtil.NullIfExists(members, doMethod),
CodeGenUtil.NullIfExists(members, strictMethod),
CodeGenUtil.NullIfExists(members, toSeqMethod),
CodeGenUtil.NullIfExists(members, iterMethod),
CodeGenUtil.NullIfExists(members, foldMethod),
CodeGenUtil.NullIfExists(members, forAllMethod),
CodeGenUtil.NullIfExists(members, existsMethod),
CodeGenUtil.NullIfExists(members, localMethod) };
memberDecls = memberDecls.Where(m => m != null).ToArray();
partialStruct = partialStruct.WithMembers(List(memberDecls));
// Return :: A -> MA
var returnFunc = MethodDeclaration(
structA,
Identifier(ctorName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithTypeParameterList(applyToStruct.TypeParameterList)
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("value"))
.WithType(
IdentifierName(genA)))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
structA,
IdentifierName(ctorName)))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("value")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
// Fail :: String -> MA
var failFunc1 = MethodDeclaration(
structA,
Identifier(failName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithTypeParameterList(applyToStruct.TypeParameterList)
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("message"))
.WithType(
PredefinedType(
Token(SyntaxKind.StringKeyword))))))
.WithExpressionBody(
ArrowExpressionClause(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
structA,
IdentifierName("Fail")))
.WithArgumentList(
ArgumentList(
SingletonSeparatedList<ArgumentSyntax>(
Argument(
IdentifierName("message")))))))
.WithSemicolonToken(
Token(SyntaxKind.SemicolonToken));
var failFunc2 = MethodDeclaration(
structA,
Identifier(failName))
.WithModifiers(
TokenList(
new[]{
Token(SyntaxKind.PublicKeyword),
Token(SyntaxKind.StaticKeyword)}))
.WithTypeParameterList(applyToStruct.TypeParameterList)
.WithParameterList(
ParameterList(
SingletonSeparatedList<ParameterSyntax>(
Parameter(
Identifier("exception"))
.WithType(
CodeGenUtil.ExceptionType))))