public Type GetTypeByIdentifier(Identifier key)
{
if (!ContainsIdentifier(key)) return typeof(object);
IStaticReturnType terminal = _identifierLookupTable[key] as IStaticReturnType;
return terminal != null ? terminal.GetReturnType() : typeof(object);
}
public void EvaluationAssignmentOfVariable()
{
Initialize(@"form ExampleBlock {
question Q1 (number) ""Give me a number"";
if (Q1==2){
statement S1 (number, Q1) ""you wrote 2"";
}
else {
statement S2 (number, Q1) ""you didnt write 2"";
};
}
");
Assert.IsTrue(Builder.RunEvaluators());
Identifier i = new Identifier("Q1");
NumberWrapper nw = (NumberWrapper)Builder.DataContext.ValueReferenceTable.GetValue(i);
nw.Value = 2;
Assert.IsTrue(Builder.RunEvaluators());
Identifier S1 = new Identifier("S1");
NumberWrapper S1_value = (NumberWrapper)Builder.DataContext.ValueReferenceTable.GetValue(S1);
Assert.AreEqual(nw.Value,S1_value.Value);
}
Type DetermineType(Identifier identifier)
{
if (ReferenceTables.ContainsIdentifier(identifier))
{
return ReferenceTables.GetTypeByIdentifier(identifier);
}
throw new QLError("Undeclared variable: " + identifier.Value);
}
private void DeclareNewVariable(Identifier key, IResolvable value)
{
if (ReferenceTables.ContainsIdentifier(key))
{
Exceptions.Add(new RedeclaredVariableWarning("Redeclared variable detected: " + key, key.SourceLocation));
}
ReferenceTables.SetReference(key, value);
}
public void Visit(Identifier node)
{
}
public StatementUnit(Identifier identifier, Expression expression, string unitText, IStaticReturnType dataType, SourceLocation sourceLocation)
: base(identifier, dataType, unitText, sourceLocation)
{
Expression = expression;
}
public bool Equals(Identifier obj)
{
return Value == obj.Value;
}
private ITerminalWrapper GetValue(Identifier key)
{
if (_identifierLookupTable.ContainsKey(key) && _referenceLookupTable.ContainsKey(_identifierLookupTable[key]))
{
return _referenceLookupTable[_identifierLookupTable[key]];
}
if (_identifierLookupTable.ContainsKey(key))
{
throw new QLError("Reference not initialised");
}
throw new QLError("Usage of variable " + key.Value + " before declaration");
}
public void SetReference(Identifier key, IResolvable value)
{
_identifierLookupTable[key] = value;
}
public QuestionUnit(Identifier identifier, IStaticReturnType dataType, string displayText)
: base(identifier, dataType, displayText)
{
}
public bool ContainsIdentifier(Identifier key)
{
return _identifierLookupTable.ContainsKey(key);
}
public QuestionUnit(Identifier identifier, IStaticReturnType dataType, string displayText, SourceLocation sourceLocation)
: base(identifier, dataType, displayText, sourceLocation)
{
}
public override void ExitIdentifier(QLParser.IdentifierContext context)
{
Identifier literal = new Identifier(context.IDENTIFIER().GetText(), SourceLocation.CreateFor(context));
AppendToAST(literal);
}
public Form(Identifier identifier, Block block, SourceLocation sourceLocation)
: this(identifier, block)
{
SourceLocation = sourceLocation;
}
public Form(Identifier identifier, ElementBase block)
{
throw new Exception(identifier + ": " + block + " is not a block");
}
public Form(Identifier identifier, Block block)
{
Identifier = identifier;
Block = block;
}
