如何在xtext列表中添加分隔符?

问题描述:

我有以下语法片段:

FixtureGroup:
                            name            = ID 
    ':'                     fixtures += [Fixture]*
    ';';

在这种情况下,我可以为上述规则键入以下内容:

And in the instance I can type for the above rule the following:

FrontLeft: FrontLeft1 FrontLeft2;

但是,我想输入的内容是以下两者之间的加号:

However, what I like to type is a plus in between:

FrontLeft: FrontLeft1 + FrontLeft2;

我应该如何更改语法以实现此目的?

How should I change the grammar to accomplish this?

常用模式是

':' (fixtures += [Fixture] ('+' fixtures += [Fixture])*)?