作用域对象的 Xtext 示例

发布于 2024-12-10 07:42:34 字数 364 浏览 3 评论 0 原文

我正在寻找一个示例（在 XText 中），说明如何在用户定义的对象成员上实现代码完成。据我所知，我需要使用 IScope，但所有这些如何连接在一起还不清楚。

鉴于 trait 是用户定义的类型，当我输入 name.< 时，如何构建语法来编码完成/验证 String 中包含的方法。 /代码>？

trait String {
    def toLowerCase(): String
    def toUpperCase(): String
}

val name = new String()
name.toLowerCase()

谢谢

原文

I'm looking for an example (in XText) of how to implement code completion on an user defined objects members. As far as I can see I need to use IScope, but how all this wires together is unclear.

Given that trait is a user defined type, how do I go about building a grammar to code complete / validate the methods contained within String when I type name.?

trait String {
    def toLowerCase(): String
    def toUpperCase(): String
}

val name = new String()
name.toLowerCase()

Thanks

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枫林﹌晚霞¤ 2024-12-17 07:42:34

这在很大程度上取决于你的语法，你必须做什么才能采用范围界定。
假设您的语法类似于

Model:
    statements+=Statement+
;

Statement:
    Trait | VarDef | Call
;

Trait:
    "trait" name=ID "{"
        ops+=Operation*
    "}"
;

Operation:
    "def" name=ID "()" ":" type=[Trait]
;

VarDef:
    "val" name=ID "=" "new" type=[Trait] "()"
;

Call:
    var=[VarDef] "." op=[Operation] "()"
;

您的范围提供程序，

public class MyDslScopeProvider extends AbstractDeclarativeScopeProvider {

    IScope scope_Call_op(Call call, EReference ref) {
        return Scopes.scopeFor(call.getVar().getType().getOps());
    }
}

您可以在此处找到有关该主题的博客系列：

https://web.archive.org/web/20130129085620/http://blogs.itemis.de/stundzig/archives/773

It highly depends on your grammar what you have to do to adopt scoping.
Let us say you have a grammar like

Model:
    statements+=Statement+
;

Statement:
    Trait | VarDef | Call
;

Trait:
    "trait" name=ID "{"
        ops+=Operation*
    "}"
;

Operation:
    "def" name=ID "()" ":" type=[Trait]
;

VarDef:
    "val" name=ID "=" "new" type=[Trait] "()"
;

Call:
    var=[VarDef] "." op=[Operation] "()"
;

then your scopeprovider would look like

public class MyDslScopeProvider extends AbstractDeclarativeScopeProvider {

    IScope scope_Call_op(Call call, EReference ref) {
        return Scopes.scopeFor(call.getVar().getType().getOps());
    }
}

You can find a blog series on the topic here:

https://web.archive.org/web/20130129085620/http://blogs.itemis.de/stundzig/archives/773

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