public override object VisitAssign([NotNull] TinyScriptParser.AssignContext context)
{
var type = (Type)VisitExpression(context.expression());
var name = context.Identifier().GetText();
Variable value;
if (_variables.TryGetValue(name, out value))
{
if (value.Value == null)
{
LocalBuilder variable;
if (value.Type == null)
{
variable = _builder.DeclareLocal(type);
value.Type = type;
}
else if (value.Type != type)
{
throw context.Exception("Cannot convert type [{0}] to [{1}].", type.Name, value.Type.Name);
}
else
{
variable = _builder.DeclareLocal(type);
}
value.Value = variable;
}
_builder.SetLocal(value.Value);
return(null);
}
throw context.Exception("Variable [{0}] not defined.", name);
}
public override object VisitAssign([NotNull] TinyScriptParser.AssignContext context)
{
var name = context.Identifier().GetText();
VarValue obj;
if (!Variables.TryGetValue(name, out obj))
{
throw context.Exception("Variable [{0}] not defined.", name);
}
var r = base.VisitAssign(context);
if (obj != null && obj.Value != null)
{
if (obj.Value.GetType() != r.GetType())
{
throw context.Exception("Cannot convert type [{1}] to [{0}].", obj.Value.GetType().Name, r.GetType().Name);
}
}
Variables[name] = new VarValue(obj.StartIndex, r);
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="TinyScriptParser.assign"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitAssign([NotNull] TinyScriptParser.AssignContext context)
{
return(VisitChildren(context));
}
