syntax: Highlight dots in aliases as aliases

It's confusing that "defmodule Foo.Bar" was highlighted differently than "Foo.Bar.fun". Unify the two.

Author: liskin

spec/syntax/alias_spec.rb

@@ -4,9 +4,10 @@
 
 describe 'Alias syntax' do
  it 'colorize only module alias' do
- expect(<<~EOF).to include_elixir_syntax('elixirAlias', 'Enum')
- Enum.empty?(...)
- EOF
+ str = "Enum.empty?(...)"
+ expect(str).to include_elixir_syntax('elixirAlias', 'Enum')
+ expect(str).to include_elixir_syntax('elixirOperator', '\.')
+ expect(str).to include_elixir_syntax('elixirId', 'empty?')
  end
 
  it 'colorize the module alias even if it starts with `!`' do
@@ -33,4 +34,15 @@
  expect(str).to include_elixir_syntax('elixirAlias', '3')
  expect(str).to include_elixir_syntax('elixirAlias', 'Manager')
  end
+
+ it 'colorize dots in module alias' do
+ str = "Foo.Bar.Baz.fun(...)"
+ expect(str).to include_elixir_syntax('elixirAlias', 'Foo')
+ expect(str).to include_elixir_syntax('elixirAlias', '\.\(Bar\)\@=')
+ expect(str).to include_elixir_syntax('elixirAlias', 'Bar')
+ expect(str).to include_elixir_syntax('elixirAlias', '\.\(Baz\)\@=')
+ expect(str).to include_elixir_syntax('elixirAlias', 'Baz')
+ expect(str).to include_elixir_syntax('elixirOperator', '\.\(fun\)\@=')
+ expect(str).to include_elixir_syntax('elixirId', 'fun')
+ end
 end

spec/syntax/defmodule_spec.rb

@@ -10,9 +10,10 @@
  end
 
  it 'defines module name as elixirModuleDeclaration' do
- expect(<<~EOF).to include_elixir_syntax('elixirModuleDeclaration', 'HelloPhoenix.HelloController')
- defmodule HelloPhoenix.HelloController do
- EOF
+ str = "defmodule HelloPhoenix.HelloController do"
+ expect(str).to include_elixir_syntax('elixirModuleDeclaration', 'HelloPhoenix')
+ expect(str).to include_elixir_syntax('elixirModuleDeclaration', '\.')
+ expect(str).to include_elixir_syntax('elixirModuleDeclaration', 'HelloController')
  end
 
  it 'does not define module name as elixirAlias' do

syntax/elixir.vim

@@ -39,7 +39,7 @@ syn match elixirOperator '\.\.\|\.'
 syn match elixirOperator "\^\^\^\|\^"
 syn match elixirOperator '\\\\\|::\|\*\|/\|\~\~\~\|@'
 
-syn match elixirAlias '\([a-z]\)\@<![A-Z]\w*'
+syn match elixirAlias '\([a-z]\)\@<![A-Z]\w*\%(\.[A-Z]\w*\)*'
 
 syn match elixirAtom '\(:\)\@<!:\%([a-zA-Z_]\w*\%([?!]\|=[>=]\@!\)\?\|<>\|===\?\|>=\?\|<=\?\)'
 syn match elixirAtom '\(:\)\@<!:\%(<=>\|&&\?\|%\(()\|\[\]\|{}\)\|++\?\|--\?\|||\?\|!\|//\|[%&`/|]\)'