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mod ansi;
mod generic;
mod hive;
pub mod keywords;
mod mssql;
mod mysql;
mod postgresql;
mod snowflake;
mod sqlite;
use core::any::{Any, TypeId};
use core::fmt::Debug;
pub use self::ansi::AnsiDialect;
pub use self::generic::GenericDialect;
pub use self::hive::HiveDialect;
pub use self::mssql::MsSqlDialect;
pub use self::mysql::MySqlDialect;
pub use self::postgresql::PostgreSqlDialect;
pub use self::snowflake::SnowflakeDialect;
pub use self::sqlite::SQLiteDialect;
macro_rules! dialect_of {
( $parsed_dialect: ident is $($dialect_type: ty)|+ ) => {
($($parsed_dialect.dialect.is::<$dialect_type>())||+)
};
}
pub trait Dialect: Debug + Any {
fn is_delimited_identifier_start(&self, ch: char) -> bool {
ch == '"'
}
fn is_identifier_start(&self, ch: char) -> bool;
fn is_identifier_part(&self, ch: char) -> bool;
}
impl dyn Dialect {
#[inline]
pub fn is<T: Dialect>(&self) -> bool {
TypeId::of::<T>() == self.type_id()
}
}
#[cfg(test)]
mod tests {
use super::ansi::AnsiDialect;
use super::generic::GenericDialect;
use super::*;
struct DialectHolder<'a> {
dialect: &'a dyn Dialect,
}
#[test]
fn test_is_dialect() {
let generic_dialect: &dyn Dialect = &GenericDialect {};
let ansi_dialect: &dyn Dialect = &AnsiDialect {};
let generic_holder = DialectHolder {
dialect: generic_dialect,
};
let ansi_holder = DialectHolder {
dialect: ansi_dialect,
};
assert!(dialect_of!(generic_holder is GenericDialect | AnsiDialect),);
assert!(!dialect_of!(generic_holder is AnsiDialect));
assert!(dialect_of!(ansi_holder is AnsiDialect));
assert!(dialect_of!(ansi_holder is GenericDialect | AnsiDialect),);
assert!(!dialect_of!(ansi_holder is GenericDialect | MsSqlDialect),);
}
}