1 files changed, 0 insertions, 187 deletions

diff --git a/crates/ra_mbe/src/mbe_parser.rs b/crates/ra_mbe/src/mbe_parser.rs
deleted file mode 100644
index 954b84d9d..000000000
--- a/crates/ra_mbe/src/mbe_parser.rs
+++ /dev/null
@@ -1,187 +0,0 @@
-use crate::tt_cursor::TtCursor;
-/// This module parses a raw `tt::TokenStream` into macro-by-example token
-/// stream. This is a *mostly* identify function, expect for handling of
-/// `$var:tt_kind` and `$(repeat),*` constructs.
-use crate::ParseError;
-
-pub(crate) fn parse(tt: &tt::Subtree) -> Result<crate::MacroRules, ParseError> {
-    let mut parser = TtCursor::new(tt);
-    let mut rules = Vec::new();
-    while !parser.is_eof() {
-        rules.push(parse_rule(&mut parser)?);
-        if let Err(e) = parser.expect_char(';') {
-            if !parser.is_eof() {
-                return Err(e);
-            }
-            break;
-        }
-    }
-    Ok(crate::MacroRules { rules })
-}
-
-fn parse_rule(p: &mut TtCursor) -> Result<crate::Rule, ParseError> {
-    let lhs = parse_subtree(p.eat_subtree()?, false)?;
-    p.expect_char('=')?;
-    p.expect_char('>')?;
-    let mut rhs = parse_subtree(p.eat_subtree()?, true)?;
-    rhs.delimiter = crate::Delimiter::None;
-    Ok(crate::Rule { lhs, rhs })
-}
-
-fn is_boolean_literal(lit: Option<&tt::TokenTree>) -> bool {
-    if let Some(tt::TokenTree::Leaf(tt::Leaf::Literal(lit))) = lit {
-        if lit.text == "true" || lit.text == "false" {
-            return true;
-        }
-    }
-
-    false
-}
-
-fn parse_subtree(tt: &tt::Subtree, transcriber: bool) -> Result<crate::Subtree, ParseError> {
-    let mut token_trees = Vec::new();
-    let mut p = TtCursor::new(tt);
-    while let Some(tt) = p.eat() {
-        let child: crate::TokenTree = match tt {
-            tt::TokenTree::Leaf(leaf) => match leaf {
-                tt::Leaf::Punct(tt::Punct { char: '$', spacing }) => {
-                    // mbe var can be an ident or keyword, including `true` and `false`
-                    if p.at_ident().is_some() || is_boolean_literal(p.current()) {
-                        crate::Leaf::from(parse_var(&mut p, transcriber)?).into()
-                    } else if let Some(tt::TokenTree::Subtree(_)) = p.current() {
-                        parse_repeat(&mut p, transcriber)?.into()
-                    } else {
-                        // Treat it as normal punct
-                        crate::Leaf::from(tt::Punct { char: '$', spacing: *spacing }).into()
-                    }
-                }
-                tt::Leaf::Punct(punct) => crate::Leaf::from(*punct).into(),
-                tt::Leaf::Ident(tt::Ident { text, .. }) => {
-                    crate::Leaf::from(crate::Ident { text: text.clone() }).into()
-                }
-                tt::Leaf::Literal(tt::Literal { text }) => {
-                    crate::Leaf::from(crate::Literal { text: text.clone() }).into()
-                }
-            },
-            tt::TokenTree::Subtree(subtree) => parse_subtree(&subtree, transcriber)?.into(),
-        };
-        token_trees.push(child);
-    }
-    Ok(crate::Subtree { token_trees, delimiter: tt.delimiter })
-}
-
-fn parse_var(p: &mut TtCursor, transcriber: bool) -> Result<crate::Var, ParseError> {
-    let text = {
-        if is_boolean_literal(p.current()) {
-            let lit = p.eat_literal().unwrap();
-            lit.text.clone()
-        } else {
-            let ident = p.eat_ident().unwrap();
-            ident.text.clone()
-        }
-    };
-
-    let kind = if !transcriber && p.at_char(':') {
-        p.bump();
-        if let Some(ident) = p.eat_ident() {
-            Some(ident.text.clone())
-        } else {
-            p.rev_bump();
-            None
-        }
-    } else {
-        None
-    };
-
-    Ok(crate::Var { text, kind })
-}
-
-fn mk_repeat(
-    rep: char,
-    subtree: crate::Subtree,
-    separator: Option<crate::Separator>,
-) -> Result<crate::Repeat, ParseError> {
-    let kind = match rep {
-        '*' => crate::RepeatKind::ZeroOrMore,
-        '+' => crate::RepeatKind::OneOrMore,
-        '?' => crate::RepeatKind::ZeroOrOne,
-        _ => return Err(ParseError::Expected(String::from("repeat"))),
-    };
-    Ok(crate::Repeat { subtree, kind, separator })
-}
-
-fn parse_repeat(p: &mut TtCursor, transcriber: bool) -> Result<crate::Repeat, ParseError> {
-    let subtree = p.eat_subtree()?;
-    let mut subtree = parse_subtree(subtree, transcriber)?;
-    subtree.delimiter = crate::Delimiter::None;
-
-    if let Some(rep) = p.at_punct() {
-        match rep.char {
-            '*' | '+' | '?' => {
-                p.bump();
-                return mk_repeat(rep.char, subtree, None);
-            }
-            _ => {}
-        }
-    }
-
-    let sep = p.eat_seperator().ok_or_else(|| ParseError::Expected(String::from("separator")))?;
-    let rep = p.eat_punct().ok_or_else(|| ParseError::Expected(String::from("repeat")))?;
-
-    mk_repeat(rep.char, subtree, Some(sep))
-}
-
-#[cfg(test)]
-mod tests {
-    use ra_syntax::{ast, AstNode};
-
-    use super::*;
-    use crate::ast_to_token_tree;
-
-    #[test]
-    fn test_invalid_parse() {
-        expect_err("invalid", "subtree");
-
-        is_valid("($i:ident) => ()");
-        is_valid("($($i:ident)*) => ($_)");
-        is_valid("($($true:ident)*) => ($true)");
-        is_valid("($($false:ident)*) => ($false)");
-
-        expect_err("$i:ident => ()", "subtree");
-        expect_err("($i:ident) ()", "`=`");
-        expect_err("($($i:ident)_) => ()", "repeat");
-    }
-
-    fn expect_err(macro_body: &str, expected: &str) {
-        assert_eq!(
-            create_rules(&format_macro(macro_body)),
-            Err(ParseError::Expected(String::from(expected)))
-        );
-    }
-
-    fn is_valid(macro_body: &str) {
-        assert!(create_rules(&format_macro(macro_body)).is_ok());
-    }
-
-    fn format_macro(macro_body: &str) -> String {
-        format!(
-            "
-        macro_rules! foo {{
-            {}
-        }}
-",
-            macro_body
-        )
-    }
-
-    fn create_rules(macro_definition: &str) -> Result<crate::MacroRules, ParseError> {
-        let source_file = ast::SourceFile::parse(macro_definition).ok().unwrap();
-        let macro_definition =
-            source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
-
-        let (definition_tt, _) =
-            ast_to_token_tree(&macro_definition.token_tree().unwrap()).unwrap();
-        parse(&definition_tt)
-    }
-
-}