Unable to use as using Match: @match (Match not defined)

[Ismael-VC]

I'm not sure why this happens, maybe it's something to do with macro hygiene?

julia> versioninfo()
Julia Version 1.6.3
Commit ae8452a9e0 (2021-09-23 17:34 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, haswell)

(@v1.6) pkg> status
      Status `C:\Users\ismae\.julia\environments\v1.6\Project.toml`
  [6e4b80f9] BenchmarkTools v1.2.0
  [c43c736e] Genie v3.2.0
  [7eb4fadd] Match v1.1.0
  [6fe1bfb0] OffsetArrays v1.10.7
  [c3e4b0f8] Pluto v0.16.1
  [b873ce64] ReplMaker v0.2.5
  [98e33af6] SimpleDirectMediaLayer v0.3.0
  [90137ffa] StaticArrays v1.2.13

julia> using Match: @match

julia> @match (0xabcd & 0x1f) begin
           0x0d => :foo
       end
ERROR: UndefVarError: Match not defined
Stacktrace:
 [1] top-level scope
   @ REPL[2]:2

julia> using Match

julia> @match (0xabcd & 0x1f) begin
           0x0d => :foo
       end
:foo

[kmsquire]

Yeah, the macro itself includes code that calls functions in Match, and therefore requires that Match itself be imported.

This probably isn't fixable here, but the Rematch package works with your example, and has most of the functionality of Match.

I've been planning to merge their package back into Match.jl and transfer the package to them, but haven't gotten around to it.

[gafter]

He's gotten around to it. We're working on it.

[gafter]

julia> versioninfo()
Julia Version 1.6.6
Commit b8708f954a (2022-03-28 07:17 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Apple M2 Max
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, westmere)
Environment:
  JULIA_SSL_CA_ROOTS_PATH = 

(@v1.6) pkg> add Match
  Installing known registries into `~/.julia`
       Added registry `General` to `~/.julia/registries/General`
   Resolving package versions...
    Updating `~/.julia/environments/v1.6/Project.toml`
  [7eb4fadd] + Match v2.0.0
    Updating `~/.julia/environments/v1.6/Manifest.toml`
  [1914dd2f] + MacroTools v0.5.10
  [7eb4fadd] + Match v2.0.0
  [bac558e1] + OrderedCollections v1.6.2
  [2a0f44e3] + Base64
  [d6f4376e] + Markdown
  [9a3f8284] + Random
  [9e88b42a] + Serialization
Precompiling project...
  3 dependencies successfully precompiled in 2 seconds

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

julia> using Match: @match

julia> @match (0xabcd & 0x1f) begin
                  0x0d => :foo
              end
:foo