https://github.com/JuliaLang/julia
Tip revision: 10f80efd976d65d677372dd7964ab623ce420b69 authored by Jameson Nash on 25 July 2017, 20:18:24 UTC
WIP: move macro-expand scope resolution into resolve-scopes
WIP: move macro-expand scope resolution into resolve-scopes
Tip revision: 10f80ef
ambiguous.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
# DO NOT ALTER ORDER OR SPACING OF METHODS BELOW
const lineoffset = @__LINE__
ambig(x, y) = 1
ambig(x::Integer, y) = 2
ambig(x, y::Integer) = 3
ambig(x::Int, y::Int) = 4
ambig(x::Number, y) = 5
# END OF LINE NUMBER SENSITIVITY
# For curmod_*
include("testenv.jl")
ambigs = Any[[], [3], [2,5], [], [3]]
mt = methods(ambig)
getline(m::Method) = m.line - lineoffset
for m in mt
ln = getline(m)
atarget = ambigs[ln]
if isempty(atarget)
@test m.ambig === nothing
else
aln = Int[getline(a) for a in m.ambig]
@test sort(aln) == atarget
end
end
@test length(methods(ambig)) == 5
@test length(Base.methods_including_ambiguous(ambig, Tuple)) == 5
@test length(methods(ambig, (Int, Int))) == 1
@test length(methods(ambig, (UInt8, Int))) == 0
@test length(Base.methods_including_ambiguous(ambig, (UInt8, Int))) == 2
@test ambig("hi", "there") == 1
@test ambig(3.1, 3.2) == 5
@test ambig(3, 4) == 4
@test_throws MethodError ambig(0x03, 4)
@test_throws MethodError ambig(0x03, 4) # test that not inserted into cache
# Ensure it still works with potential inlining
callambig(x, y) = ambig(x, y)
@test_throws MethodError callambig(0x03, 4)
# Printing ambiguity errors
let err = try
ambig(0x03, 4)
catch _e_
_e_
end
io = IOBuffer()
Base.showerror(io, err)
lines = split(String(take!(io)), '\n')
ambig_checkline(str) = startswith(str, " ambig(x, y::Integer) in $curmod_str at") ||
startswith(str, " ambig(x::Integer, y) in $curmod_str at")
@test ambig_checkline(lines[2])
@test ambig_checkline(lines[3])
@test lines[4] == "Possible fix, define"
@test lines[5] == " ambig(::Integer, ::Integer)"
end
## Other ways of accessing functions
# Test that non-ambiguous cases work
io = IOBuffer()
@test precompile(ambig, (Int, Int)) == true
cfunction(ambig, Int, (Int, Int))
@test length(code_lowered(ambig, (Int, Int))) == 1
@test length(code_typed(ambig, (Int, Int))) == 1
code_llvm(io, ambig, (Int, Int))
code_native(io, ambig, (Int, Int))
# Test that ambiguous cases fail appropriately
@test precompile(ambig, (UInt8, Int)) == false
cfunction(ambig, Int, (UInt8, Int)) # test for a crash (doesn't throw an error)
@test_throws ErrorException which(ambig, (UInt8, Int))
@test_throws ErrorException code_llvm(io, ambig, (UInt8, Int))
@test_throws ErrorException code_native(io, ambig, (UInt8, Int))
# Method overwriting doesn't destroy ambiguities
@test_throws MethodError ambig(2, 0x03)
ambig(x, y::Integer) = 3
@test_throws MethodError ambig(2, 0x03)
# Method overwriting by an ambiguity should also invalidate the method cache (#21963)
ambig(x::Union{Char, Int8}) = 'r'
@test ambig('c') == 'r'
@test ambig(Int8(1)) == 'r'
@test_throws MethodError ambig(Int16(1))
ambig(x::Union{Char, Int16}) = 's'
@test_throws MethodError ambig('c')
@test ambig(Int8(1)) == 'r'
@test ambig(Int16(1)) == 's'
# Automatic detection of ambiguities
module Ambig1
ambig(x, y) = 1
ambig(x::Integer, y) = 2
ambig(x, y::Integer) = 3
end
ambs = detect_ambiguities(Ambig1)
@test length(ambs) == 1
module Ambig2
ambig(x, y) = 1
ambig(x::Integer, y) = 2
ambig(x, y::Integer) = 3
ambig(x::Number, y) = 4
end
ambs = detect_ambiguities(Ambig2)
@test length(ambs) == 2
module Ambig3
ambig(x, y) = 1
ambig(x::Integer, y) = 2
ambig(x, y::Integer) = 3
ambig(x::Int, y::Int) = 4
end
ambs = detect_ambiguities(Ambig3)
@test length(ambs) == 1
module Ambig4
ambig(x, y) = 1
ambig(x::Int, y) = 2
ambig(x, y::Int) = 3
ambig(x::Int, y::Int) = 4
end
ambs = detect_ambiguities(Ambig4)
@test length(ambs) == 0
module Ambig5
ambig(x::Int8, y) = 1
ambig(x::Integer, y) = 2
ambig(x, y::Int) = 3
end
ambs = detect_ambiguities(Ambig5)
@test length(ambs) == 2
# Test that Core and Base are free of ambiguities
# not using isempty so this prints more information when it fails
@test detect_ambiguities(Core, Base; imported=true, ambiguous_bottom=false) == []
# some ambiguities involving Union{} type parameters are expected, but not required
@test !isempty(detect_ambiguities(Core, Base; imported=true, ambiguous_bottom=true))
amb_1(::Int8, ::Int) = 1
amb_1(::Integer, x) = 2
amb_1(x, ::Int) = 3
# if there is an ambiguity with some methods and not others, `methods`
# should return just the non-ambiguous ones, i.e. the ones that could actually
# be called.
@test length(methods(amb_1, Tuple{Integer, Int})) == 1
amb_2(::Int, y) = 1
amb_2(x, ::Int) = 2
amb_2(::Int8, y) = 3
@test length(methods(amb_2)) == 3 # make sure no duplicates
amb_3(::Int8, ::Int8) = 1
amb_3(::Int16, ::Int16) = 2
amb_3(::Integer, ::Integer) = 3
amb_3(::Integer, x) = 4
amb_3(x, ::Integer) = 5
# ambiguous definitions exist, but are covered by multiple more specific definitions
let ms = methods(amb_3).ms
@test !Base.isambiguous(ms[4], ms[5])
end
amb_4(::Int8, ::Int8) = 1
amb_4(::Int16, ::Int16) = 2
amb_4(::Integer, x) = 4
amb_4(x, ::Integer) = 5
# as above, but without sufficient definition coverage
let ms = methods(amb_4).ms
@test Base.isambiguous(ms[3], ms[4])
end
g16493(x::T, y::Integer) where {T<:Number} = 0
g16493(x::Complex{T}, y) where {T} = 1
let ms = methods(g16493, (Complex, Any))
@test length(ms) == 1
@test first(ms).sig == (Tuple{typeof(g16493), Complex{T}, Any} where T)
end
# issue #17350
module Ambig6
struct ScaleMinMax{To,From} end
map1(mapi::ScaleMinMax{To,From}, val::From) where {To<:Union{Float32,Float64},From<:Real} = 1
map1(mapi::ScaleMinMax{To,From}, val::Union{Real,Complex}) where {To<:Union{Float32,Float64},From<:Real} = 2
end
@test isempty(detect_ambiguities(Ambig6))
module Ambig7
struct T end
(::T)(x::Int8, y) = 1
(::T)(x, y::Int8) = 2
end
@test length(detect_ambiguities(Ambig7)) == 1
module Ambig17648
struct MyArray{T,N} <: AbstractArray{T,N}
data::Array{T,N}
end
foo(::Type{Array{T,N}}, A::MyArray{T,N}) where {T,N} = A.data
foo(::Type{Array{T,N}}, A::MyArray{T,N}) where {T<:AbstractFloat,N} = A.data
foo(::Type{Array{S,N}}, A::AbstractArray{T,N}) where {S<:AbstractFloat,N,T<:AbstractFloat} = copy!(Array{S}(size(A)), A)
foo(::Type{Array{S,N}}, A::MyArray{T,N}) where {S<:AbstractFloat,N,T<:AbstractFloat} = copy!(Array{S}(size(A)), A.data)
end
@test isempty(detect_ambiguities(Ambig17648))
module Ambig8
using Base: DimsInteger, Indices
g18307(::Union{Indices,Dims}, I::AbstractVector{T}...) where {T<:Integer} = 1
g18307(::DimsInteger) = 2
g18307(::DimsInteger, I::Integer...) = 3
end
try
# want this to be a test_throws MethodError, but currently it's not (see #18307)
Ambig8.g18307((1,))
catch err
if isa(err, MethodError)
error("Test correctly returned a MethodError, please change to @test_throws MethodError")
else
rethrow(err)
end
end
module Ambig9
f(x::Complex{<:Integer}) = 1
f(x::Complex{<:Rational}) = 2
end
@test !Base.isambiguous(methods(Ambig9.f)..., ambiguous_bottom=false)
@test Base.isambiguous(methods(Ambig9.f)..., ambiguous_bottom=true)
@test !Base.isambiguous(methods(Ambig9.f)...)
@test length(detect_ambiguities(Ambig9, ambiguous_bottom=false)) == 0
@test length(detect_ambiguities(Ambig9, ambiguous_bottom=true)) == 1
@test length(detect_ambiguities(Ambig9)) == 0
nothing # don't return a module from the remote include