public override int VisitLogical_and(BRAQParser.Logical_andContext context)
{
if (context.left != null)
{
context.left.Accept(this);
// если левый оператор ложный, тогда перепрыгиваем, иначе правый
Label falsey = il.DefineLabel(); //stack: left
il.Emit(OpCodes.Brfalse_S, falsey); //stack:
context.right.Accept(this); //stack: right
Label truthey = il.DefineLabel();
il.Emit(OpCodes.Br_S, truthey); //stack: right
il.MarkLabel(falsey); //from Brfalse, stack:
il.Emit(OpCodes.Ldc_I4_0); //stack: 0
il.MarkLabel(truthey); //from br_s, stack: right
}
else
{
context.right.Accept(this);
}
return(0);
}
/// <summary>
/// Visit a parse tree produced by <see cref="BRAQParser.logical_and"/>.
/// <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 VisitLogical_and([NotNull] BRAQParser.Logical_andContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="BRAQParser.logical_and"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitLogical_and([NotNull] BRAQParser.Logical_andContext context)
{
}
public override Type VisitLogical_and(BRAQParser.Logical_andContext context)
{
return(binary_optional_left_expr(context, context.left, context.op, context.right));
}
