Trait synthez_core::ParseBufferExt [−][src]
pub trait ParseBufferExt: Sealed {
fn try_parse<T: Default + Parse + Token>(&self) -> Result<Option<T>>;
fn is_next<T: Default + Token>(&self) -> bool;
fn parse_any_ident(&self) -> Result<Ident>;
fn parse_wrapped_and_punctuated<T, W, P>(&self) -> Result<Punctuated<T, P>>
where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token;
fn parse_maybe_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>>
where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token;
fn parse_eq_or_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>>
where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token;
fn skip_any_ident(&self) -> Result<()> { ... }
}Expand description
Extension of a syn::parse::ParseBuffer providing common function widely
used by this crate for parsing.
Required methods
Tries to parse T as the next Token.
Doesn’t move ParseBuffer’s cursor if there is no T.
Errors
If T fails to be parsed.
Checks whether the next Token is T.
Doesn’t move ParseBuffer’s cursor.
fn parse_any_ident(&self) -> Result<Ident>
fn parse_any_ident(&self) -> Result<Ident>Parses the next Token as syn::Ident allowing Rust keywords,
while default Parse implementation for syn::Ident disallows
them.
Always moves ParseBuffer’s cursor.
Errors
If syn::Ident fails to be parsed.
fn parse_wrapped_and_punctuated<T, W, P>(&self) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token,
fn parse_wrapped_and_punctuated<T, W, P>(&self) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token, Parses the wrapped (in a wrapper W) Tokens as T Punctuated
with a P separator.
Always moves ParseBuffer’s cursor.
Errors
If parsing Punctuated T wrapped into W fails.
fn parse_maybe_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token,
fn parse_maybe_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token, Checks whether the next Token is a wrapper W and if yes, then
parses the wrapped Tokens as T Punctuated with a P
separator. Otherwise, parses just T.
Always moves ParseBuffer’s cursor.
Errors
If either parsing Punctuated T wrapped into W, or parsing just
T, fails.
fn parse_eq_or_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token,
fn parse_eq_or_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token, Checks whether the next Token is a wrapper W and if yes, then
parses the wrapped Tokens as T Punctuated with a P
separator. Otherwise, parses just T following the token::Eq.
Always moves ParseBuffer’s cursor.
Errors
If either parsing Punctuated T wrapped into W, or parsing just
T following the token::Eq, fails.
Provided methods
fn skip_any_ident(&self) -> Result<()>
fn skip_any_ident(&self) -> Result<()>Parses the next Token as syn::Ident allowing Rust keywords,
while default Parse implementation for syn::Ident disallows
them. Drops the parsed Token in-place.
Always moves ParseBuffer’s cursor.
Errors
If syn::Ident fails to be parsed.
Implementations on Foreign Types
fn parse_wrapped_and_punctuated<T, W, P>(&self) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token, fn parse_maybe_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token, fn parse_eq_or_wrapped_and_punctuated<T, W, P>(
&self
) -> Result<Punctuated<T, P>> where
T: Parse,
W: Default + Token + 'static,
P: Default + Parse + Token,