/// <summary>
/// Define a constant in the MSL.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="constant"></param>
private void BuildConstant <T>(Variable <T> constant)
{
if (constant.IsBase)
{
if (ShouldInlineConstant(constant))
{
// do nothing. the value will be put inline.
}
else
{
// check if we have defined a constant with the same value already
IVariableDeclaration ivd;
bool useExisting = false;
object key = constant.ObservedValue;
if (ReferenceEquals(key, null))
{
key = new NullValue <T>();
}
if (constants.TryGetValue(key, out ivd))
{
// use the declaration of the existing constant
useExisting = constant.SetDeclaration(ivd);
}
if (!useExisting)
{
// create a new declaration
ivd = (IVariableDeclaration)constant.GetDeclaration();
var rhs = Quoter.Quote(constant.ObservedValue);
if (ReferenceEquals(constant.ObservedValue, null))
{
rhs = Builder.CastExpr(rhs, typeof(T));
}
AddStatement(Builder.AssignStmt(Builder.VarDeclExpr(ivd), rhs));
constants[key] = ivd;
}
FinishGivenOrConstant(constant, ivd);
}
}
else if (constant.IsArrayElement)
{
// do nothing
}
else
{
throw new NotImplementedException("Unhandled constant type: " + constant);
}
}
internal IStatement GetAccumulateStatement(BasicTransformContext context, IExpression accumulator, IExpression value)
{
IExpression imie = Builder.StaticGenericMethod(accumulateMethod, new Type[] { accumulator.GetExpressionType() }, accumulator, value);
return(Builder.AssignStmt(accumulator, imie));
}