Feature request: constructor list when opening curly brace

[rg3]

First off, thanks for your work on ccls and its Visual Studio Code plugin. They are fantastic and I'm using them with great success to work on several codebases. Second, I have a feature request.

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Observed behavior

When using ccls and vscode-ccls, if you have a class named Foo with several constructors available, ccls immediately offers and lets you view the list of constructors as soon as you type:

Foo foo(

However, when using the C++11 uniform initialization syntax with curly braces no completion seems to happen.

Foo foo{

Expected behavior

Attempting to use uniform initialization syntax lets you view available constructors as usual.

Steps to reproduce

1. Create a new project with a file with the following contents in Visual Studio Code:

#include <string>

class Foo
{
public:
    Foo (int value) {}
    Foo (const std::string& value) {}
};

int main (void)
{
    Foo foo(0);
    return 0;
}

2. Delete the last characters from the Foo foo(0); line.
3. Test constructor completion using Foo foo{