public override object VisitVariableExpression([NotNull] TinyScriptParser.VariableExpressionContext context)
{
var c = context.GetChild(0);
var text = c.GetText();
switch (text)
{
case "true": _builder.LoadInt(1); return(typeof(bool));
case "false": _builder.LoadInt(0); return(typeof(bool));
}
if (text.StartsWith("\""))
{
var str = text.Substring(1, text.Length - 2);
_builder.LoadString(str);
return(typeof(string));
}
Variable variable;
if (_variables.TryGetValue(text, out variable))
{
_builder.LoadLocal(variable.Value);
return(variable.Type);
}
throw context.Exception("Use of undeclared identifier [{0}].", text);
}
public override object VisitVariableExpression([NotNull] TinyScriptParser.VariableExpressionContext context)
{
var n = context.GetText();
if (n == "true")
{
return(true);
}
else if (n == "false")
{
return(false);
}
else if (n.StartsWith("\""))
{
return(n.Substring(1, n.Length - 2));
}
VarValue obj;
if (!Variables.TryGetValue(n, out obj))
{
throw context.Exception("Use of undeclared identifier [{0}].", n);
}
return(obj.Value);
}
/// <summary>
/// Visit a parse tree produced by <see cref="TinyScriptParser.variableExpression"/>.
/// <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 VisitVariableExpression([NotNull] TinyScriptParser.VariableExpressionContext context)
{
return(VisitChildren(context));
}
