Struct Syntax 

#[non_exhaustive]
pub struct Syntax {
    pub line_comments: &'static [&'static str],
    pub block_comment: Option<(&'static str, &'static str)>,
    pub nested_block_comments: bool,
    pub quotes: &'static [char],
    pub interpolated_quote: Option<char>,
    pub escapes: bool,
    pub regex_literals: bool,
    pub raw_strings: bool,
    pub triple_quotes: bool,
    pub char_literals: bool,
    pub significant_indentation: bool,
    pub identifier_extra: &'static [char],
}

The lexical rules of one language.

The flags are independent lexical facts rather than a state machine, so they are listed plainly instead of being packed into an option type that would obscure which language has which behaviour.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

line_comments: &'static [&'static str]

block_comment: Option<(&'static str, &'static str)>

nested_block_comments: bool

quotes: &'static [char]

interpolated_quote: Option<char>

Quote that opens a string containing ${...} expressions.

escapes: bool

regex_literals: bool

Whether / can open a regular-expression literal.

raw_strings: bool

Whether r"..." and r#"..."# forms exist.

triple_quotes: bool

Whether """...""" spans lines.

char_literals: bool

Whether ' opens a character literal that a lifetime is also written with. Rust needs this: 'a is a lifetime and '"' is a quote character, and treating ' as an ordinary quote or as ordinary punctuation gets one of the two wrong.

significant_indentation: bool

identifier_extra: &'static [char]

Trait Implementations

impl Clone for Syntax

fn clone(&self) -> Syntax

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Syntax

impl Debug for Syntax

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.