Update

docs/src/files.md

@@ -130,18 +130,18 @@ The macro call `rdr"seqs.fna.gz"` expands to
 FASTAReader(GzipDecompressorStream(open("seqs.fna.gz"; lock=false)))
 ```
 
-To use rdr `rdr` and `wtr` macros with `do`-syntax, use the `defer` function.
-The only purpose of the defer function is to enable `do`-syntax:
+Even though the reader (or writer) is already opened, you can still use the ordinary `open(x) do f`
+pattern to automatically close the reader when done:
 
 ```jldoctest
 julia> using CodecZlib # for gzip files
 
-julia> defer(rdr"../test/data/test.fasta") do reader
+julia> open(rdr"../test/data/test.fasta") do reader
            println(identifier(first(reader)))
        end
 abc
 
-julia> defer(wtr"seqs.fna.gz") do writer 
+julia> open(wtr"seqs.fna.gz") do writer 
            write(writer, FASTARecord("my_header", "TAGAG"))
        end
 17

docs/src/index.md

@@ -77,12 +77,12 @@ julia> FASTQWriter(GzipCompressorStream(open(tempname(), "w"))) do writer
 
 For added convenience, you can also use the reader and writer macros `rdr""` and `wtr""`.
 These macros use the file extensions to determine the biological sequence reader or writer type, and any file compresion.
-To use these macros with the `do`-syntax, you can use the `defer` function. Hence, the above code block can also be written in the following equivalent way:
+To use these macros with the `do`-syntax, you can use `open` as normal. Hence, the above code block can also be written in the following equivalent way:
 
 ```jldoctest
 julia> using CodecZlib
 
-julia> defer(rdr"../test/data/seqs.fna.gz") do reader
+julia> open(rdr"../test/data/seqs.fna.gz") do reader
            for record in reader
                println(identifier(record))
            end

src/FASTX.jl

@@ -2,7 +2,7 @@ module FASTX
 
 using StringViews: StringView
 using Automa: Automa
-using BioGenerics: BioGenerics, defer, @rdr_str, @wtr_str
+using BioGenerics: BioGenerics, @rdr_str, @wtr_str
 
 """
     identifier(record::Record)::AbstractString
@@ -258,7 +258,6 @@ export
     seekrecord,
 
     # Re-export from BioGenerics
-    defer,
     @rdr_str,
     @wtr_str