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make Parsers a weakdep #78
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| module ParsersExt | ||
| using Parsers | ||
| using InlineStrings: InlineString, InlineString1, addcodeunit | ||
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||
| Parsers.xparse(::Type{T}, buf::AbstractString, pos, len, options, ::Type{S}=T) where {T <: InlineString, S} = | ||
| Parsers.xparse(T, codeunits(buf), pos, len, options, S) | ||
|
|
||
| function Parsers.xparse(::Type{T}, source::Union{AbstractVector{UInt8}, IO}, pos, len, options::Parsers.Options, ::Type{S}=T) where {T <: InlineString, S} | ||
| res = Parsers.xparse(String, source, pos, len, options, PosLen) | ||
| code = res.code | ||
| overflowed = false | ||
| poslen = res.val | ||
| if !Parsers.valueok(code) || Parsers.sentinel(code) | ||
| x = T() | ||
| else | ||
| poslen = res.val | ||
| if T === InlineString1 | ||
| if poslen.len != 1 | ||
| overflowed = true | ||
| x = T() | ||
| else | ||
| Parsers.fastseek!(source, poslen.pos) | ||
| x = InlineString1(Parsers.peekbyte(source, poslen.pos)) | ||
| Parsers.fastseek!(source, pos + res.tlen - 1) | ||
| end | ||
| elseif Parsers.escapedstring(code) || !(source isa AbstractVector{UInt8}) | ||
| if poslen.len > (sizeof(T) - 1) | ||
| overflowed = true | ||
| x = T() | ||
| else | ||
| # manually build up InlineString | ||
| i = poslen.pos | ||
| maxi = i + poslen.len | ||
| x = T() | ||
| Parsers.fastseek!(source, i - 1) | ||
| while i < maxi | ||
| b = Parsers.peekbyte(source, i) | ||
| if b == options.e | ||
| i += 1 | ||
| Parsers.incr!(source) | ||
| b = Parsers.peekbyte(source, i) | ||
| end | ||
| x, overflowed = addcodeunit(x, b) | ||
| i += 1 | ||
| Parsers.incr!(source) | ||
| end | ||
| Parsers.fastseek!(source, maxi) | ||
| end | ||
| else | ||
| vlen = poslen.len | ||
| if vlen > (sizeof(T) - 1) | ||
| # @show T, vlen, sizeof(T) | ||
| overflowed = true | ||
| x = T() | ||
| else | ||
| # @show poslen.pos, vlen | ||
| x = T(source, poslen.pos, vlen) | ||
| end | ||
| end | ||
| end | ||
| if overflowed | ||
| code |= Parsers.OVERFLOW | ||
| end | ||
| return Parsers.Result{S}(code, res.tlen, x) | ||
| end | ||
|
|
||
| end |
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Question for my own edification, not really related to the PR: If two packages (say InlineStrings and SaxophoneHorse) have extensions for Parsers, both call their extension module
ParsersExt, and you load InlineStrings, SaxophoneHorse, and Parsers, what happens? That is, does the convention of naming an extension module<main package><weakdep>Extprovide functional disambiguation or is it more for the benefit of the human?There was a problem hiding this comment.
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Never mind, mostly answered my own question. Extension modules having the same name doesn't cause any issues, so I suppose the naming convention is more for the human's benefit.
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Yes, they have different UUID so the loading system can distinguish them.