can't detect docstring

[appleparan]

julia> versioninfo()
Julia Version 0.7.0-DEV.5036
Commit 9de318afa1* (2018-05-07 18:03 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.0 (ORCJIT, sandybridge)
Environment:
  JULIA_BINDIR = C:\Users\Liam\AppData\Local\Julia-0.7.0-dev\bin
  JULIA_HOME = C:\Users\Liam\AppData\Local\Julia-0.7.0-dev\bin
  JULIA_NUM_THREADS = 4

julia> using Parameters

julia> @with_kw struct Test
       a::Int = 10
       b::Float64 = 1.0
       """
       Test
       """
       function Test(a,b)
           new(10, 20)
       end
       end
ERROR: LoadError: type String has no field head
Stacktrace:
 [1] getproperty(::Any, ::Symbol) at .\sysimg.jl:18
 [2] next(::Parameters.Lines, ::Int64) at C:\Users\Liam\.julia\v0.7\Parameters\src\Parameters.jl:29
 [3] done(::Parameters.Lines, ::Int64) at C:\Users\Liam\.julia\v0.7\Parameters\src\Parameters.jl:36
 [4] with_kw(::Expr, ::Module, ::Bool) at C:\Users\Liam\.julia\v0.7\Parameters\src\Parameters.jl:257
 [5] @with_kw(::LineNumberNode, ::Module, ::Any) at C:\Users\Liam\.julia\v0.7\Parameters\src\Parameters.jl:500
in expression starting at REPL[3]:1

Parameters.jl/src/Parameters.jl

Lines 30 to 34 in 85dc58c

	if ( lns.block.args[i] isa Symbol
	|| lns.block.args[i] isa String # doc-string
	|| !(lns.block.args[i].head==:line))
	return lns.block.args[i], i+1
	end

Error shows that lns.block.args[i] is a String, and that's why Julia complains about field head. From my understanding, evaluation of if conditions stops when the condition matches, so when matches lns.block.args[i] isa String it is enough. However, it seems Julia also evaluate next line(!(lns.block.args[i].head==:line)) ).

[mauro3]

This works on Master since last week ;-) (Note though that your example also runs into JuliaLang/julia#27091)

So, I'll close. Feel free to re-open if you feel it's not resolved. I'm currently working on some other stuff, so unless it is urgent for you, I'll wait to tag a new version for a bit.