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Refactoring

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This commit is contained in:
Andy Grove 2018-09-02 19:08:44 -06:00
parent 69a140a820
commit 2e20b15c2e
5 changed files with 68 additions and 58 deletions
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22
src/parser.rs
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@ -110,20 +110,20 @@ pub trait SQLParser<TokenType, ExprType>
where TokenType: Debug + PartialEq, ExprType: Debug {
/// parse the prefix and stop once an infix operator is reached
fn parse_prefix(&mut self) -> Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>> ;
fn parse_prefix(&mut self, chars: &mut CharSeq) -> Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>> ;
/// parse the next infix expression, returning None if the precedence has changed
fn parse_infix(&mut self, left: &SQLExpr<ExprType>, precedence: usize) -> Result<Option<Box<SQLExpr<ExprType>>>, ParserError<TokenType>>;
fn parse_infix(&mut self, chars: &mut CharSeq, left: &SQLExpr<ExprType>, precedence: usize) -> Result<Option<Box<SQLExpr<ExprType>>>, ParserError<TokenType>>;
}
pub fn parse_expr<'a, TokenType, ExprType>(parser: Arc<Mutex<SQLParser<TokenType, ExprType>>>)
-> Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>> where TokenType: Debug + PartialEq, ExprType: Debug {
let mut guard = parser.lock().unwrap();
//Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>>
let x = guard.parse_prefix();
x
}
//
//pub fn parse_expr<'a, TokenType, ExprType>(parser: Arc<Mutex<SQLParser<TokenType, ExprType>>>)
// -> Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>> where TokenType: Debug + PartialEq, ExprType: Debug {
// let mut guard = parser.lock().unwrap();
//
// //Result<Box<SQLExpr<ExprType>>, ParserError<TokenType>>
// let x = guard.parse_prefix();
// x
//}
//pub struct PrattParser<'a, TokenType, ExprType> {