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expose findall for Vector{UInt8} #45307

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merged 5 commits into from
May 27, 2022
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expose findall for Vector{UInt8} #45307

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c918a02
expose `findall` for `Vector{UInt8}`
Moelf May 13, 2022
6964448
Update test/regex.jl
Moelf May 14, 2022
4a2b1ed
Update base/regex.jl
Moelf May 16, 2022
58fe80c
Update base/regex.jl
Moelf May 16, 2022
ca8e107
move
Moelf May 16, 2022
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24 changes: 24 additions & 0 deletions base/regex.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -444,6 +444,11 @@ findfirst(r::Regex, s::AbstractString) = findnext(r,s,firstindex(s))
string::AbstractString;
overlap::Bool = false,
)
findall(
pattern::Vector{UInt8}
string::Vector{UInt8};
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overlap::Bool = false,
)

Return a `Vector{UnitRange{Int}}` of all the matches for `pattern` in `string`.
Each element of the returned vector is a range of indices where the
Expand All @@ -467,6 +472,11 @@ julia> findall("a", "banana")
2:2
4:4
6:6

julia> findall(UInt8[1,2], UInt8[1,2,3,1,2])
2-element Vector{UnitRange{Int64}}:
1:2
4:5
```

!!! compat "Julia 1.3"
Expand All @@ -486,6 +496,20 @@ function findall(t::Union{AbstractString,AbstractPattern}, s::AbstractString; ov
return found
end

function findall(t::T, s::T; overlap::Bool=false) where {T <: Vector{UInt8}}
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found = UnitRange{Int}[]
i, e = firstindex(s), lastindex(s)
while true
r = findnext(t, s, i)
isnothing(r) && break
push!(found, r)
j = overlap || isempty(r) ? first(r) : last(r)
j > e && break
@inbounds i = nextind(s, j)
end
return found
end

"""
findall(c::AbstractChar, s::AbstractString)

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4 changes: 4 additions & 0 deletions test/regex.jl
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Expand Up @@ -69,6 +69,10 @@
@test findall('→', "OH⁻ + H₃CBr → HOH₃CBr⁻ → HOCH₃ + Br⁻") == [17, 35]
@test findall('a', "") == Int[]
@test findall('c', "batman") == Int[]
@test findall([0x52, 0x62], [0x40, 0x52, 0x62, 0x63]) == [2:3]
@test findall([0x52, 0x62], [0x40, 0x52, 0x62, 0x63, 0x52, 0x64]) == [2:3, 5:6]
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@test findall([0x01, 0x01], [0x01, 0x01, 0x01, 0x01]) == [1:2, 3:4]
@test findall([0x01, 0x01], [0x01, 0x01, 0x01, 0x01]; overlap=true) == [1:2, 2:3, 3:4]

# count
@test count(r"\w+", "foo bar") == 2
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