Can't match nested symbols

[jamii]

@match :(@when a < b) begin
  Expr(_, [Symbol("@when"), _], _) => :ok
  Expr(_, [other, _], _) => other
end
# returns Symbol("@when")

Using Julia 0.5.0-rc4+0 and Match 0.2.2

[thautwarm]

@jamii
It can be matched, the reason for your prob is, @m has an AST formed as Expr(:macrocall, Symbol("@m"), ::LineNumberNode, <args...>), while you missed the LineNumberNode.

[gafter]

julia> Pkg.status()
      Status `~/.julia/environments/v1.6/Project.toml`
  [7eb4fadd] Match v2.0.0

julia> @match :(@when a < b) begin
         Expr(_, [Symbol("@when"), _], _) => :ok
         Expr(_, [other, _], _) => other
       end
ERROR: LoadError: REPL[59]:2: The type `Expr` has 2 fields but the pattern expects 3 fields.

julia> @match :(@when a < b) begin
         Expr(_, [Symbol("@when"), _::LineNumberNode, _]) => :ok
         Expr(_, [other, _, _]) => other
       end
:ok