/// <summary>
/// Compile a Zen expression to native IL.
/// </summary>
/// <param name="function">The function.</param>
/// <param name="maxUnrollingDepth">The maximum unrolling depth.</param>
/// <returns>A native IL function.</returns>
public static Func <T1, T2, T3, T4> Compile <T1, T2, T3, T4>(Func <Zen <T1>, Zen <T2>, Zen <T3>, Zen <T4> > function, int maxUnrollingDepth)
{
var args = ImmutableDictionary <string, Expression> .Empty;
var arg1 = new ZenArgumentExpr <T1>();
var param1 = Expression.Parameter(typeof(T1));
args = args.Add(arg1.Id, param1);
var arg2 = new ZenArgumentExpr <T2>();
var param2 = Expression.Parameter(typeof(T2));
args = args.Add(arg2.Id, param2);
var arg3 = new ZenArgumentExpr <T3>();
var param3 = Expression.Parameter(typeof(T3));
args = args.Add(arg3.Id, param3);
var env = new ExpressionConverterEnvironment(args);
var e = function(arg1, arg2, arg3);
var expr = CompileToBlock(e, env, ImmutableDictionary <object, Expression> .Empty, 0, maxUnrollingDepth);
var lambda = Expression.Lambda <Func <T1, T2, T3, T4> >(expr, new ParameterExpression[] { param1, param2, param3 });
return(lambda.Compile());
}
/// <summary>
/// Compile a Zen expression to native IL.
/// </summary>
/// <param name="function">The function.</param>
/// <param name="maxUnrollingDepth">The maximum unrolling depth.</param>
/// <returns>A native IL function.</returns>
public static Func <T> Compile <T>(Func <Zen <T> > function, int maxUnrollingDepth)
{
var args = ImmutableDictionary <string, Expression> .Empty;
var env = new ExpressionConverterEnvironment(args);
var e = function();
var expr = CompileToBlock(e, env, ImmutableDictionary <object, Expression> .Empty, 0, maxUnrollingDepth);
var lambda = Expression.Lambda <Func <T> >(expr, new ParameterExpression[] { });
return(lambda.Compile());
}
internal static Expression CompileToBlock <T>(
Zen <T> zenExpression,
ExpressionConverterEnvironment env,
ImmutableDictionary <object, Expression> subexpressionCache,
int currentMatchUnrollingDepth,
int maxMatchUnrollingDepth)
{
var converter = new ExpressionConverter(subexpressionCache, currentMatchUnrollingDepth, maxMatchUnrollingDepth);
var expr = zenExpression.Accept(converter, env);
converter.BlockExpressions.Add(expr);
return(Expression.Block(converter.Variables, converter.BlockExpressions.ToArray()));
}