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feat: support contains and occursin method #37

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Merged
Beforerr merged 1 commit into from
Feb 5, 2026
Merged

feat: support contains and occursin method #37

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30 changes: 27 additions & 3 deletions src/staticstring.jl
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
# https://github.com/mkitti/StaticStrings.jl
# https://github.com/JuliaPy/PythonCall.jl/blob/main/src/Utils/Utils.jl
using Base: between

struct StaticString{N, T} <: AbstractString
codeunits::NTuple{N, T}
Expand Down Expand Up @@ -60,10 +61,33 @@ function Base.String(x::StaticString{N, T}) where {N, T}
return String(b .= x.codeunits)
end

@inline Base.ncodeunits(::StaticString{N}) where N = N
@inline Base.ncodeunits(::StaticString{N}) where {N} = N
Base.codeunit(::StaticString{N, T}) where {N, T} = T
Base.@propagate_inbounds Base.codeunit(s::StaticString, i::Int) = s.codeunits[i]

function StaticString(cu::Base.CodeUnits{T}) where T
function StaticString(cu::Base.CodeUnits{T}) where {T}
N = length(cu)
return StaticString{N, T}(NTuple{N, T}(cu))
end
StaticString(s::AbstractString) = StaticString(codeunits(s))
StaticString(s::AbstractString) = StaticString(codeunits(s))

Base.isvalid(s::StaticString, i::Int) = checkbounds(Bool, s, i) && thisind(s, i) == i
Base.thisind(s::StaticString, i::Int) = _thisind_str(s, i)

@inline function _thisind_str(s, i::Int)
i == 0 && return 0
n = ncodeunits(s)
i == n + 1 && return i
@boundscheck between(i, 1, n) || throw(BoundsError(s, i))
@inbounds b = codeunit(s, i)
(b & 0xc0 == 0x80) & (i - 1 > 0) || return i
@inbounds b = codeunit(s, i - 1)
between(b, 0b11000000, 0b11110111) && return i - 1
(b & 0xc0 == 0x80) & (i - 2 > 0) || return i
@inbounds b = codeunit(s, i - 2)
between(b, 0b11100000, 0b11110111) && return i - 2
(b & 0xc0 == 0x80) & (i - 3 > 0) || return i
@inbounds b = codeunit(s, i - 3)
between(b, 0b11110000, 0b11110111) && return i - 3
return i
end
8 changes: 7 additions & 1 deletion test/staticstring.jl
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using CommonDataFormat: StaticString
using Test

@testset "StaticString" begin
s = "Hello, World!"
Expand All @@ -8,4 +9,9 @@ using CommonDataFormat: StaticString
@test ss == s
@test String(ss) == s
@test !isempty(ss)
end
@test contains(ss, "World")
@test occursin("World", ss)
@test replace(ss, "World" => "Julia") == "Hello, Julia!"

@test codeunit(ss) == UInt8
end
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