/// <summary>
/// Exit a parse tree produced by <see cref="algoParser.statement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitStatement([NotNull] algoParser.StatementContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="algoParser.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 VisitStatement([NotNull] algoParser.StatementContext context)
{
return(VisitChildren(context));
}
//When evaluating a statement, switch for type.
public override object VisitStatement([NotNull] algoParser.StatementContext context)
{
//What type is it?
if (context.stat_define() != null)
{
//Define statement.
VisitStat_define(context.stat_define());
}
else if (context.stat_setvar() != null)
{
//Set a variable after its definition.
VisitStat_setvar(context.stat_setvar());
}
else if (context.stat_setvar_op() != null)
{
//Set a variable using a self modifying operator.
VisitStat_setvar_op(context.stat_setvar_op());
}
else if (context.stat_setvar_postfix() != null)
{
//Set a variable using a postfix operator.
VisitStat_setvar_postfix(context.stat_setvar_postfix());
}
else if (context.stat_deletevar() != null)
{
//Delete a variable from scope.
VisitStat_deletevar(context.stat_deletevar());
}
else if (context.stat_if() != null)
{
//An "if" statement.
return(VisitStat_if(context.stat_if()));
}
else if (context.stat_forLoop() != null)
{
//A for loop.
return(VisitStat_forLoop(context.stat_forLoop()));
}
else if (context.stat_whileLoop() != null)
{
//A while loop.
return(VisitStat_whileLoop(context.stat_whileLoop()));
}
else if (context.stat_enumDef() != null)
{
//Definition of an enum.
VisitStat_enumDef(context.stat_enumDef());
}
else if (context.stat_functionCall() != null)
{
//A function call.
//This should NOT return, it's a top level single function call.
VisitStat_functionCall(context.stat_functionCall());
}
else if (context.stat_functionDef() != null)
{
//A function definition.
VisitStat_functionDef(context.stat_functionDef());
}
else if (context.stat_return() != null)
{
//Returning a value from a function call.
return(VisitStat_return(context.stat_return()));
}
else if (context.stat_print() != null)
{
//A print statement.
VisitStat_print(context.stat_print());
}
else if (context.stat_library() != null)
{
//Defining a library.
VisitStat_library(context.stat_library());
}
else if (context.stat_import() != null)
{
//Importing an Algo script.
VisitStat_import(context.stat_import());
}
else if (context.stat_loadFuncExt() != null)
{
//Load an external or internal plugin function.
VisitStat_loadFuncExt(context.stat_loadFuncExt());
}
else if (context.stat_list_add() != null)
{
//Add a value to a list.
VisitStat_list_add(context.stat_list_add());
}
else if (context.stat_list_remove() != null)
{
//Remove a value from a list.
VisitStat_list_remove(context.stat_list_remove());
}
else if (context.stat_break() != null)
{
//Break statement, return a break value.
return(AlgoValue.Break);
}
else if (context.stat_continue() != null)
{
//Continue statement, return a continue value.
return(AlgoValue.Continue);
}
else if (context.stat_try_catch() != null)
{
//Try/catch block.
return(VisitStat_try_catch(context.stat_try_catch()));
}
else if (context.stat_throw() != null)
{
//Throw an error.
VisitStat_throw(context.stat_throw());
}
else
{
Error.Fatal(context, "Syntax error, unrecognized statement.");
}
return(null);
}
