// возвращает Statement (IfStatement)
public override object VisitIfStatement([NotNull] DoshikParser.IfStatementContext context)
{
_compilationContext.SetParsingAntlrContext(context);
var statement = new IfStatement(_currentNode);
_currentExpressionParent = statement;
statement.Condition = ExpressionCreationVisitor.Apply(_compilationContext, _currentExpressionParent, context.condition);
if (statement.Condition.RootExpression.ReturnOutputSlot.Type != _compilationContext.TypeLibrary.FindByKnownType(KnownType.Boolean))
{
throw _compilationContext.ThrowCompilationError("condition must evaluate to bool value");
}
statement.TrueStatement = (Statement)Visit(context.trueBody);
if (context.falseBody != null)
{
statement.FalseStatement = (Statement)Visit(context.falseBody);
}
return(statement);
}
/// <summary>
/// Visit a parse tree produced by the <c>ifStatement</c>
/// labeled alternative in <see cref="DoshikParser.statement"/>.
/// <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 VisitIfStatement([NotNull] DoshikParser.IfStatementContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>ifStatement</c>
/// labeled alternative in <see cref="DoshikParser.statement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitIfStatement([NotNull] DoshikParser.IfStatementContext context)
{
}