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author | Robin Krahl <robin.krahl@ireas.org> | 2020-01-07 11:18:04 +0000 |
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committer | Daniel Mueller <deso@posteo.net> | 2020-01-08 09:20:25 -0800 |
commit | 5e20a29b4fdc8a2d442d1093681b396dcb4b816b (patch) | |
tree | 55ab083fa8999d2ccbb5e921c1ffe52560dca152 /rustversion/src/attr.rs | |
parent | 203e691f46d591a2cc8acdfd850fa9f5b0fb8a98 (diff) | |
download | nitrocli-5e20a29b4fdc8a2d442d1093681b396dcb4b816b.tar.gz nitrocli-5e20a29b4fdc8a2d442d1093681b396dcb4b816b.tar.bz2 |
Add structopt dependency in version 0.3.7
This patch series replaces argparse with structopt in the argument
handling code. As a first step, we need structopt as a dependency.
Import subrepo structopt/:structopt at efbdda4753592e27bc430fb01f7b9650b2f3174d
Import subrepo bitflags/:bitflags at 30668016aca6bd3b02c766e8347e0b4080d4c296
Import subrepo clap/:clap at 784524f7eb193e35f81082cc69454c8c21b948f7
Import subrepo heck/:heck at 093d56fbf001e1506e56dbfa38631d99b1066df1
Import subrepo proc-macro-error/:proc-macro-error at 6c4cfe79a622c5de8ae68557993542be46eacae2
Import subrepo proc-macro2/:proc-macro2 at d5d48eddca4566e5438e8a2cbed4a74e049544de
Import subrepo quote/:quote at 727436c6c137b20f0f34dde5d8fda2679b9747ad
Import subrepo rustversion/:rustversion at 0c5663313516263059ce9059ef81fc7a1cf655ca
Import subrepo syn-mid/:syn-mid at 5d3d85414a9e6674e1857ec22a87b96e04a6851a
Import subrepo syn/:syn at e87c27e87f6f4ef8919d0372bdb056d53ef0d8f3
Import subrepo textwrap/:textwrap at abcd618beae3f74841032aa5b53c1086b0a57ca2
Import subrepo unicode-segmentation/:unicode-segmentation at 637c9874c4fe0c205ff27787faf150a40295c6c3
Import subrepo unicode-width/:unicode-width at 3033826f8bf05e82724140a981d5941e48fce393
Import subrepo unicode-xid/:unicode-xid at 4baae9fffb156ba229665b972a9cd5991787ceb7
Diffstat (limited to 'rustversion/src/attr.rs')
-rw-r--r-- | rustversion/src/attr.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/rustversion/src/attr.rs b/rustversion/src/attr.rs new file mode 100644 index 0000000..591b2c0 --- /dev/null +++ b/rustversion/src/attr.rs @@ -0,0 +1,35 @@ +use crate::expr::Expr; +use proc_macro2::TokenStream; +use syn::parse::{Parse, ParseStream, Result}; +use syn::Token; + +pub struct Args { + pub condition: Expr, + pub then: Then, +} + +pub enum Then { + Const(Token![const]), + Attribute(TokenStream), +} + +impl Parse for Args { + fn parse(input: ParseStream) -> Result<Self> { + let condition: Expr = input.parse()?; + + input.parse::<Token![,]>()?; + if input.is_empty() { + return Err(input.error("expected one or more attrs")); + } + + let const_token: Option<Token![const]> = input.parse()?; + let then = if let Some(const_token) = const_token { + input.parse::<Option<Token![,]>>()?; + Then::Const(const_token) + } else { + input.parse().map(Then::Attribute)? + }; + + Ok(Args { condition, then }) + } +} |