I need some help

[desarrollo03TR]

Hi! your project looks great, but I need your help because I don't know how to use the vs extension.

After install the vs extensions I created a new project, then, I'm trying following this:

1- Add a .xs file to your project.
2- Install extensions as Nuget packages.
3- Include the extensions you need with using xs.

The step 1 is done, no problem, but I don't know which nuget packages I need to install. I Found the Excess.Extensions, the Excess.Runtime, Excess.Compiler and another packages.

Thanks!

[xs-admin]

Hello, Some of the packages you mention are not extensions but the libs you'd need to build your own languages. The rest are indeed extensions: - Excess.Server <https://www.nuget.org/packages/Excess.Server/0.48.16-alpha> is our web server extension - Excess.Extensions <https://www.nuget.org/packages/Excess.Extensions/0.48.10-alpha> is a collection of extensions you can find in the project with the same name - Excess.Concurrent <https://www.nuget.org/packages/Excess.Concurrent/0.48.10-alpha> is our concurrency extension - Excess.Extensions.NInjector <https://www.nuget.org/packages/Excess.Extensions.NInjector/0.48.10-alpha> is an implementation of the *inject *idiom based on the NInjector library - Excess.Extensions.Dapper <https://www.nuget.org/packages/Excess.Extensions.Dapper/0.48.10-alpha> is a sql extension internally implemented with Dapper. I hope this is useful, please feel free to ask any questions, in particular if you are interested in creating languages. Best Regards, Emilio Santos

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On Thu, Jan 4, 2018 at 7:31 PM, desarrollo03TR ***@***.***> wrote: Hi! your project looks great, but I need your help because I don't know how to use the vs extension. After install the vs extensions I created a new project, then, I'm trying following this: 1- Add a .xs file to your project. 2- Install extensions as Nuget packages. 3- Include the extensions you need with using xs. The step 1 is done, no problem, but I don't know which nuget packages I need to install. I Found the Excess.Extensions, the Excess.Runtime, Excess.Compiler and another packages. Thanks! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#3>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAuj-yeRakhFAYCiAn7Ys-dNh5bUXks5tHXuDgaJpZM4RT7Ox> .

[desarrollo03TR]

Then, I need to add ".xs" files with my own languages? I this related with the code in the http://xslang.azurewebsites.net website?

[xs-admin]

No, your languages are written in C# as nay of the extensions I listed before. You'd be using the Excess.Compiler library and using one (or many) of our compiler helpers. When you are done, you can publish it as a nuget packages for anyone to use, If you give me more info about the language you intend to create I could likely point you to something similar already in existence. http://xslang.azurewebsites.net is a basic web compiler that internally uses excess, but it is not an extension language itself.

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On Thu, Jan 4, 2018 at 8:03 PM, desarrollo03TR ***@***.***> wrote: Then, I need to add ".xs" files with my own languages? I this related with the code in the http://xslang.azurewebsites.net website? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAqdjjAOXw1dSUqmzOx8VUyknq9f_ks5tHYMGgaJpZM4RT7Ox> .

[desarrollo03TR]

Thanks! I don't know how far I can go with language extensions, what I need is to extend c# language because I have several functions that I use on all my programs, for example, an "if" replacement as expression and not as statement, instead writing:

var x = 0;
if (!something)
    x = 5;
else
    x = 10;

I write:

var x = If(!something, 5, 10);

And would be great if I can write something like:

var x = if (!something) then 5 else 10;

Or similar, or convert the switch statement in an expression match:

var x = 
    match(month)
    { 
        case 0: "January";
        case 1: "February";
        ...
        default: "Not a month";
    }

Transformed to:

var x = Function(() => 
{
    switch(month)
    {
        case 0: return "January";
        ...
    }
    return "Not a month";
}

Basically I need to replace some custom statement with my functions, "syntactic sugar", but I don't know if it is possible.

[xs-admin]

This is definitively possible, your first grammar If(condition, then, else) is very easy, you'd register a syntax match where you watch for invocations where the function name is "If" and then you replace that expression with a proper if statement. The second If() then ... else ...; is also possible, though I'm not sure it is advisable, in this case you'd write a lexical extension (that deals with tokens instead of AST nodes) that would look something like: lexical .match() .token("If") .enclosed('(', ')', named: "condition") .token('then') .until("else", named: "then_expression") .until(';', named: "else_expression") .then(YourFunction) This of course you have to play with, but the gist is: in "YourFunction" you will receive the results of parsing (including condition, then_expression, else_expression) and you will build a Roslyn IfStatement with it. Hope it helps.

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On Thu, Jan 4, 2018 at 8:27 PM, desarrollo03TR ***@***.***> wrote: Thanks! I don't know how far I can go with language extensions, what I need is to extend c# language because I have several functions that I use on all my programs, for example, an "if" replacement as expression and not as statement, instead writing: var x = 0; if (!something) x = 5; else x = 10; I write: var x = If(!something, 5, 10); And would be great if I can write something like: var x = If (!something) then 5 else 10; Or similar. Basically I need to replace some custom statement with my functions. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAmA8BL16X_bndne80k_41nMsZJsnks5tHYiDgaJpZM4RT7Ox> .

[desarrollo03TR]

Thanks. Can you share an project example?

[xs-admin]

You could look at the "function" implementation here: https://github.com/xs-admin/Excess/blob/master/Excess.Compiler/xslang/Functions.cs And, in reality, all the files in the folder https://github.com/xs-admin/Excess/blob/master/Excess.Compiler/xslang I recommend you use tests like this one to test your language: https://github.com/xs-admin/Excess/blob/master/Excess.Compiler/Tests/FunctionTests.cs Hope it helps!

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On Thu, Jan 4, 2018 at 9:05 PM, desarrollo03TR ***@***.***> wrote: Thanks. Can you share an project example? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAi__RsHxd9PbUDIh1sIr9pYMczEOks5tHZFsgaJpZM4RT7Ox> .

[desarrollo03TR]

Thanks a lot! I'll try to develop my own library.

[xs-admin]

Please let me know how it goes

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On Thu, Jan 4, 2018 at 9:15 PM, desarrollo03TR ***@***.***> wrote: Thanks a lot! I'll try to develop my own library. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jArL3cWwfcVHVUe8tc31LlRqo2iBYks5tHZPUgaJpZM4RT7Ox> .

[desarrollo03TR]

Another question: if I want to use the dapper extensions (or another extensions), how can I use it? Is it possible to use it?

EDIT: after some testing, I can use the arrays, match and function extensions, but contract and typedef are not working (or I don't know how to use it).

[xs-admin]

you use it by including it in your .xs file: using xs.extension_name;

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On Fri, Jan 5, 2018 at 10:49 AM, desarrollo03TR ***@***.***> wrote: Another question: if I want to use the dapper extensions (or another extensions), how can I use it? Is it possible to use it? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAgfGa6q2o2Z8yH-ck-bbgcTa557vks5tHlK3gaJpZM4RT7Ox> .

[desarrollo03TR]

Thanks, after some testing, everything except typedef is working.

[xs-admin]

Yes, in retrospect I should remove the typedef, there is not enough advantages to keep it.

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On Fri, Jan 5, 2018 at 5:07 PM, desarrollo03TR ***@***.***> wrote: Thanks, after some testing everything except typedef is working. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAufod2-vzKsB6IxRs6SFbn2tXjAdks5tHqs8gaJpZM4RT7Ox> .

[desarrollo03TR]

typedef could be useful if it create a really new type, for example, a type definition like this:

typedef byte Age;

could be transpiled to:

public partial struct Age : IEquatable<Age>, IEquatable<byte>, IComparable<byte>, IComparable<Age>, IConvertible, IFormattable
{
    private readonly byte value;
    public  byte Value { get { return value; }}
    public Age(byte value)
    {
        this.value = value;
    }
    
    // all the equality and comparision methods
}

A great option for value types creation.

[xs-admin]

That is a very good point, when initially implemented I was playing with extension cooperation (multiple .xs files sharing the typedefs) but I have desisted on that idea so far. Things get very complicated in those scenarios.

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On Sat, Jan 6, 2018 at 1:10 PM, desarrollo03TR ***@***.***> wrote: typedef could be useful is it create a really new type, for example, a type definition like this: typedef byte age; and be transpiled to: public partial struct Age : IEquatable<Age>, IEquatable<byte>, IComparable<byte>, IComparable<Age>, IConvertible, IFormattable { private readonly byte value; public byte Value { get { return value; }} public Age(byte value) { this.value = value; } // all the equality and comparision methods } A great option for create value types. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJ0jAmhqj8fVL5_DNG0UceYgMX25rJvlks5tH8UegaJpZM4RT7Ox> .