80 lines
1.9 KiB
Rust
80 lines
1.9 KiB
Rust
use crate::syntax::content::{Lexeme, Parseable};
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#[derive(Debug, Clone, Eq, PartialEq)]
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pub struct Oblique {
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open: bool,
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}
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impl Oblique {
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pub const fn new(open: bool) -> Oblique { Oblique { open } }
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}
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impl Parseable for Oblique {
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fn probe(lexeme: &Lexeme) -> bool { lexeme.text() == "_" }
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fn lex(_lexeme: &Lexeme) -> Oblique {
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panic!("Attempt to lex an oblique tag directly from a lexeme")
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}
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fn render(&self) -> String {
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if self.open {
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String::from("<em>")
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} else {
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String::from("</em>")
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}
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}
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fn flatten(&self) -> String { String::default() }
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}
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impl std::fmt::Display for Oblique {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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let display_open_state = if self.open { "open" } else { "closed" };
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write!(f, "Oblique [{display_open_state}]")
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::syntax::content::parser::Token;
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#[test]
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fn render() {
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let code_open = Oblique::new(true);
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assert_eq!(code_open.render(), "<em>");
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let code_closed = Oblique::new(false);
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assert_eq!(code_closed.render(), "</em>");
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}
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#[test]
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#[should_panic(
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expected = "Attempt to lex an oblique tag directly from a lexeme"
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)]
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fn lex() { Oblique::lex(&Lexeme::default()); }
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#[test]
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fn token_display() {
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let mut oblique = Oblique::new(true);
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assert_eq!(
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format!("{}", Token::Oblique(oblique.clone())),
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"Tk:Oblique [open]"
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);
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oblique.open = false;
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assert_eq!(
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format!("{}", Token::Oblique(oblique)),
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"Tk:Oblique [closed]"
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);
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}
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#[test]
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fn flatten() {
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let oblique = Oblique::new(false);
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assert_eq!(oblique.flatten(), "");
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let token = Token::Oblique(oblique);
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assert_eq!(token.flatten(), "");
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}
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}
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