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WIP Generalize Fix1 and Fix2 #36180

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548c3c6
WIP generalize Fix1 Fix2
goretkin Jun 7, 2020
7c5a800
Try to bootstrap
goretkin Jun 7, 2020
766beae
Update base/operators.jl
goretkin Jun 8, 2020
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10 changes: 8 additions & 2 deletions base/Base.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -83,11 +83,19 @@ include("traits.jl")
include("range.jl")
include("error.jl")

# Some type
include("some.jl")

# core numeric operations & types
include("bool.jl")
include("number.jl")
include("int.jl")
include("operators.jl")

# The following definitions are not in `operators.jl` so they are not seen by bootstrapping (`compiler.jl`)
getproperty(f::Fix1, s::Symbol) = s === :x ? getx(f) : getfield(f, s)
getproperty(f::Fix2, s::Symbol) = s === :x ? getx(f) : getfield(f, s)

include("pointer.jl")
include("refvalue.jl")
include("refpointer.jl")
Expand Down Expand Up @@ -149,8 +157,6 @@ end
include("multimedia.jl")
using .Multimedia

# Some type
include("some.jl")

include("dict.jl")
include("abstractset.jl")
Expand Down
3 changes: 3 additions & 0 deletions base/compiler/compiler.jl
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Expand Up @@ -40,6 +40,9 @@ include("range.jl")
include("expr.jl")
include("error.jl")

# Some type
include("some.jl")

# core numeric operations & types
include("bool.jl")
include("number.jl")
Expand Down
35 changes: 35 additions & 0 deletions base/operators.jl
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Expand Up @@ -913,6 +913,7 @@ julia> filter(!isletter, str)
"""
!(f::Function) = (x...)->!f(x...)

#=
"""
Fix1(f, x)

Expand Down Expand Up @@ -946,6 +947,40 @@ struct Fix2{F,T} <: Function
end

(f::Fix2)(y) = f.f(y, f.x)
=#

interleave(bind::Tuple{}, args::Tuple{}) = ()
interleave(bind::Tuple{}, args::Tuple) = error("more args than positions")
interleave(bind, args) = _interleave(first(bind), tail(bind), args)

# `nothing` indicates a position to be bound
_interleave(firstbind::Nothing, tailbind::Tuple, args::Tuple) = (
first(args), interleave(tailbind, tail(args))...)

# allow escaping of e.g. `nothing`
_interleave(firstbind::Some{T}, tailbind::Tuple, args::Tuple) where T = (
something(firstbind), interleave(tailbind, args)...)

_interleave(firstbind::T, tailbind::Tuple, args::Tuple) where T = (
firstbind, interleave(tailbind, args)...)

struct Bind{F, A}
f::F
a::A
end

function (c::Bind)(args...)
c.f(interleave(c.a, args)...)
end

const Fix1{F, X} = Bind{F, Tuple{Some{X}, Nothing}}
const Fix2{F, X} = Bind{F, Tuple{Nothing, Some{X}}}
Fix1(f, x) = Bind(f, (Some(x), nothing))
Fix2(f, x) = Bind(f, (nothing, Some(x)))

getx(f::Fix1) = something(f.a[1])
getx(f::Fix2) = something(f.a[2])


"""
isequal(x)
Expand Down
12 changes: 6 additions & 6 deletions base/strings/search.jl
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Expand Up @@ -9,7 +9,7 @@ function findnext(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:AbstractChar}
throw(BoundsError(s, i))
end
@inbounds isvalid(s, i) || string_index_err(s, i)
c = pred.x
c = getx(pred)
c ≤ '\x7f' && return nothing_sentinel(_search(s, c % UInt8, i))
while true
i = _search(s, first_utf8_byte(c), i)
Expand All @@ -20,10 +20,10 @@ function findnext(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:AbstractChar}
end

findfirst(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:Union{Int8,UInt8}}, a::ByteArray) =
nothing_sentinel(_search(a, pred.x))
nothing_sentinel(_search(a, getx(pred)))

findnext(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:Union{Int8,UInt8}}, a::ByteArray, i::Integer) =
nothing_sentinel(_search(a, pred.x, i))
nothing_sentinel(_search(a, getx(pred), i))

function _search(a::Union{String,ByteArray}, b::Union{Int8,UInt8}, i::Integer = 1)
if i < 1
Expand All @@ -48,7 +48,7 @@ end

function findprev(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:AbstractChar},
s::String, i::Integer)
c = pred.x
c = getx(pred)
c ≤ '\x7f' && return nothing_sentinel(_rsearch(s, c % UInt8, i))
b = first_utf8_byte(c)
while true
Expand All @@ -60,10 +60,10 @@ function findprev(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:AbstractChar}
end

findlast(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:Union{Int8,UInt8}}, a::ByteArray) =
nothing_sentinel(_rsearch(a, pred.x))
nothing_sentinel(_rsearch(a, getx(pred)))

findprev(pred::Fix2{<:Union{typeof(isequal),typeof(==)},<:Union{Int8,UInt8}}, a::ByteArray, i::Integer) =
nothing_sentinel(_rsearch(a, pred.x, i))
nothing_sentinel(_rsearch(a, getx(pred), i))

function _rsearch(a::Union{String,ByteArray}, b::Union{Int8,UInt8}, i::Integer = sizeof(a))
if i < 1
Expand Down