swh:1:snp:a72e953ecd624a7df6e6196bbdd05851996c5e40
Tip revision: e58d3ecfbd48ac457ca3b5ef64653d47f2a6a8aa authored by Valentin Churavy on 13 October 2016, 05:26:14 UTC
workaround 32bit platforms not having support for 128bit integers
workaround 32bit platforms not having support for 128bit integers
Tip revision: e58d3ec
ambiguous.jl
# This file is a part of Julia. License is MIT: http://julialang.org/license
# DO NOT ALTER ORDER OR SPACING OF METHODS BELOW
const lineoffset = @__LINE__ + 0 # XXX: __LINE__ at the end of a line is off-by-one
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
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(takebuf_string(io), '\n')
ambig_checkline(str) = startswith(str, " ambig(x, y::Integer) at") ||
startswith(str, " ambig(x::Integer, y) at")
@test ambig_checkline(lines[2])
@test ambig_checkline(lines[3])
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)
# 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
@test (x->(isempty(x) || println(x)))(detect_ambiguities(Core, Base; imported=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{T<:Number}(x::T, y::Integer) = 0
g16493{T}(x::Complex{T}, y) = 1
let ms = methods(g16493, (Complex, Any))
@test length(ms) == 1
@test first(ms).sig == Tuple{typeof(g16493), Complex{TypeVar(:T, Any, true)}, Any}
end
# issue #17350
module Ambig6
immutable ScaleMinMax{To,From} end
map1{To<:Union{Float32,Float64},From<:Real}(mapi::ScaleMinMax{To,From}, val::From) = 1
map1{To<:Union{Float32,Float64},From<:Real}(mapi::ScaleMinMax{To,From}, val::Union{Real,Complex}) = 2
end
@test isempty(detect_ambiguities(Ambig6))
module Ambig7
immutable T end
(::T)(x::Int8, y) = 1
(::T)(x, y::Int8) = 2
end
@test length(detect_ambiguities(Ambig7)) == 1
module Ambig17648
immutable MyArray{T,N} <: AbstractArray{T,N}
data::Array{T,N}
end
foo{T,N}(::Type{Array{T,N}}, A::MyArray{T,N}) = A.data
foo{T<:AbstractFloat,N}(::Type{Array{T,N}}, A::MyArray{T,N}) = A.data
foo{S<:AbstractFloat,N,T<:AbstractFloat}(::Type{Array{S,N}}, A::AbstractArray{T,N}) = copy!(Array{S}(size(A)), A)
foo{S<:AbstractFloat,N,T<:AbstractFloat}(::Type{Array{S,N}}, A::MyArray{T,N}) = copy!(Array{S}(size(A)), A.data)
end
@test isempty(detect_ambiguities(Ambig17648))
module Ambig8
using Base: DimsInteger, Indices
g18307{T<:Integer}(::Union{Indices,Dims}, I::AbstractVector{T}...) = 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
nothing # don't return a module from the remote include