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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

mod ansi;
mod generic;
pub mod keywords;
mod mssql;
mod mysql;
mod postgresql;

use std::fmt::Debug;

pub use self::ansi::AnsiDialect;
pub use self::generic::GenericDialect;
pub use self::mssql::MsSqlDialect;
pub use self::mysql::MySqlDialect;
pub use self::postgresql::PostgreSqlDialect;

pub trait Dialect: Debug {
    /// Determine if a character starts a quoted identifier. The default
    /// implementation, accepting "double quoted" ids is both ANSI-compliant
    /// and appropriate for most dialects (with the notable exception of
    /// MySQL, MS SQL, and sqlite). You can accept one of characters listed
    /// in `Word::matching_end_quote` here
    fn is_delimited_identifier_start(&self, ch: char) -> bool {
        ch == '"'
    }
    /// Determine if a character is a valid start character for an unquoted identifier
    fn is_identifier_start(&self, ch: char) -> bool;
    /// Determine if a character is a valid unquoted identifier character
    fn is_identifier_part(&self, ch: char) -> bool;
}