bendns' repos / rust-fsm
Finite state machines in rust; bendns fork to add types.
Diffstat (limited to 'rust-fsm-dsl/src/parser.rs')
-rw-r--r--rust-fsm-dsl/src/parser.rs63
1 files changed, 4 insertions, 59 deletions
diff --git a/rust-fsm-dsl/src/parser.rs b/rust-fsm-dsl/src/parser.rs
index 3685200..8b0d957 100644
--- a/rust-fsm-dsl/src/parser.rs
+++ b/rust-fsm-dsl/src/parser.rs
@@ -2,7 +2,7 @@ use syn::{
braced, bracketed, parenthesized,
parse::{Error, Parse, ParseStream, Result},
token::{Bracket, Paren},
- Ident, Token, Visibility,
+ Attribute, Ident, Token, Visibility,
};
mod kw {
@@ -106,58 +106,6 @@ impl Parse for TransitionDef {
}
}
-struct ReprC {
- repr_c: Option<bool>,
-}
-
-impl Parse for ReprC {
- fn parse(input: ParseStream) -> Result<Self> {
- let lookahead = input.lookahead1();
- if lookahead.peek(kw::repr_c) {
- let kw_repr_c = input.parse::<kw::repr_c>()?;
- let entries_content;
- parenthesized!(entries_content in input);
- match entries_content.parse::<syn::Lit>() {
- Ok(syn::Lit::Bool(b)) => {
- return Ok(ReprC {
- repr_c: Some(b.value()),
- });
- }
- _ => {
- return Err(Error::new_spanned(kw_repr_c, "Invalid repr_c argument"));
- }
- }
- }
- Ok(ReprC { repr_c: None })
- }
-}
-
-struct Derives {
- derives: Option<Vec<Ident>>,
-}
-
-impl Parse for Derives {
- fn parse(input: ParseStream) -> Result<Self> {
- let lookahead = input.lookahead1();
- if lookahead.peek(kw::derive) {
- let kw_derive = input.parse::<kw::derive>()?;
- let entries_content;
- parenthesized!(entries_content in input);
- let entries: Vec<_> = entries_content
- .parse_terminated::<_, Token![,]>(Ident::parse)?
- .into_iter()
- .collect();
- if entries.is_empty() {
- return Err(Error::new_spanned(kw_derive, "Derive list cannot be empty"));
- }
- return Ok(Derives {
- derives: Some(entries),
- });
- }
- Ok(Derives { derives: None })
- }
-}
-
/// Parses the whole state machine definition in the following form (example):
///
/// ```rust,ignore
@@ -178,14 +126,12 @@ pub struct StateMachineDef {
pub name: Ident,
pub initial_state: Ident,
pub transitions: Vec<TransitionDef>,
- pub derives: Option<Vec<Ident>>,
- pub repr_c: Option<bool>,
+ pub attributes: Vec<Attribute>,
}
impl Parse for StateMachineDef {
fn parse(input: ParseStream) -> Result<Self> {
- let Derives { derives } = input.parse()?;
- let ReprC { repr_c } = input.parse()?;
+ let attributes = Attribute::parse_outer(input)?;
let visibility = input.parse()?;
let name = input.parse()?;
@@ -204,8 +150,7 @@ impl Parse for StateMachineDef {
name,
initial_state,
transitions,
- derives,
- repr_c,
+ attributes,
})
}
}