internal static DLR.Expression<Func<Aplus, AType>> BuildExecuteMethod(
string sourceCode, Aplus environment
)
{
DLR.Expression codebody;
// TODO: fix the third function info argument
AplusCore.Compiler.AST.Node tree = Compiler.Parse.String(sourceCode, environment.LexerMode, null);
AplusScope scope = new AplusScope(null, "__EVAL__", environment,
DLR.Expression.Parameter(typeof(Aplus), "__EVAL_RUNTIME__"),
DLR.Expression.Parameter(typeof(DYN.IDynamicMetaObjectProvider), "__EVAL_MODULE__"),
//DLR.Expression.Parameter(typeof(Aplus), "__EVAL_ENVIRONMENT__"),
DLR.Expression.Label(typeof(AType), "__EVAL_EXIT__"),
isEval: true
);
if (tree == null)
{
codebody = DLR.Expression.Constant(null);
}
else if (environment.FunctionScope != null)
{
AplusScope functionScope = new AplusScope(scope, "__EVAL_IN_FUNCTION__",
moduleParam: DLR.Expression.Parameter(typeof(DYN.ExpandoObject), "__EVAL_FUNCTION_SCOPE__"),
returnTarget: scope.ReturnTarget,
isMethod: true
);
codebody = DLR.Expression.Block(
new DLR.ParameterExpression[] {
//scope.RuntimeExpression, // runtime
scope.ModuleExpression, // root context
functionScope.ModuleExpression // Function local scope
},
//DLR.Expression.Assign(
// scope.RuntimeExpression, scope.RuntimeExpression
//),
DLR.Expression.Assign(
scope.ModuleExpression, DLR.Expression.PropertyOrField(scope.RuntimeExpression, "Context")
),
DLR.Expression.Assign(
functionScope.ModuleExpression, DLR.Expression.PropertyOrField(scope.RuntimeExpression, "FunctionScope")
),
DLR.Expression.Label(
scope.ReturnTarget,
tree.Generate(functionScope)
)
);
}
else
{
codebody = DLR.Expression.Block(
new DLR.ParameterExpression[] {
//scope.RuntimeExpression, // runtime
scope.ModuleExpression // root context
},
//DLR.Expression.Assign(
// scope.RuntimeExpression, scope.RuntimeExpression
//),
DLR.Expression.Assign(
scope.ModuleExpression, DLR.Expression.PropertyOrField(scope.RuntimeExpression, "Context")
),
DLR.Expression.Label(
scope.ReturnTarget,
tree.Generate(scope)
)
);
}
DLR.Expression<Func<Aplus, AType>> lambda = DLR.Expression.Lambda<Func<Aplus, AType>>(
codebody,
scope.GetRuntimeExpression()
);
return lambda;
}
