public override Node VisitVariable([NotNull] FormulaGrammerParser.VariableContext context)
{
var variableNameToken = context.IDENTIFIER().Symbol;
if (this.configuration.HasConstant(variableNameToken.Text))
{
return(new ConstantNode(variableNameToken.Text));
}
if (this.configuration.IsVariablesSupportDisabled)
{
ParsingException.ThrowInvalidTokenException(variableNameToken);
}
var variableName = variableNameToken.Text;
if (!this.configuration.IsVariableNameValidationDisabled && !this.configuration.HasVariable(variableName))
{
ParsingException.ThrowUnknownVariableException(variableNameToken);
}
return(new VariableNode(variableName));
}
/// <summary>
/// Visit a parse tree produced by <see cref="FormulaGrammerParser.variable"/>.
/// <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 VisitVariable([NotNull] FormulaGrammerParser.VariableContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="FormulaGrammerParser.variable"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitVariable([NotNull] FormulaGrammerParser.VariableContext context)
{
}
