Move the keywords module (#352)

* Move the keywords mod from dialect mod into the root of library

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* re-export keywords from dialect for backwards compatiblity

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

src/dialect/mod.rs

@@ -13,7 +13,6 @@
 mod ansi;
 mod generic;
 mod hive;
-pub mod keywords;
 mod mssql;
 mod mysql;
 mod postgresql;
@@ -31,6 +30,7 @@ pub use self::mysql::MySqlDialect;
 pub use self::postgresql::PostgreSqlDialect;
 pub use self::snowflake::SnowflakeDialect;
 pub use self::sqlite::SQLiteDialect;
+pub use crate::keywords;
 
 /// `dialect_of!(parser is SQLiteDialect |  GenericDialect)` evaluates
 /// to `true` iff `parser.dialect` is one of the `Dialect`s specified.

src/keywords.rs

@@ -10,19 +10,20 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/// This module defines
-/// 1) a list of constants for every keyword that
-/// can appear in [Word::keyword]:
-///    pub const KEYWORD = "KEYWORD"
-/// 2) an `ALL_KEYWORDS` array with every keyword in it
-///     This is not a list of *reserved* keywords: some of these can be
-///     parsed as identifiers if the parser decides so. This means that
-///     new keywords can be added here without affecting the parse result.
-///
-///     As a matter of fact, most of these keywords are not used at all
-///     and could be removed.
-/// 3) a `RESERVED_FOR_TABLE_ALIAS` array with keywords reserved in a
-/// "table alias" context.
+//! This module defines
+//! 1) a list of constants for every keyword that
+//! can appear in [Word::keyword]:
+//!    pub const KEYWORD = "KEYWORD"
+//! 2) an `ALL_KEYWORDS` array with every keyword in it
+//!     This is not a list of *reserved* keywords: some of these can be
+//!     parsed as identifiers if the parser decides so. This means that
+//!     new keywords can be added here without affecting the parse result.
+//!
+//!     As a matter of fact, most of these keywords are not used at all
+//!     and could be removed.
+//! 3) a `RESERVED_FOR_TABLE_ALIAS` array with keywords reserved in a
+//! "table alias" context.
+
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
@@ -59,9 +60,7 @@ macro_rules! define_keywords {
         pub const ALL_KEYWORDS: &[&str] = &[
             $($ident),*
         ];
-
     };
-
 }
 
 // The following keywords should be sorted to be able to match using binary search

src/lib.rs

@@ -42,6 +42,7 @@ extern crate alloc;
 pub mod ast;
 #[macro_use]
 pub mod dialect;
+pub mod keywords;
 pub mod parser;
 pub mod tokenizer;
 

src/parser.rs

@@ -25,8 +25,8 @@ use core::fmt;
 use log::debug;
 
 use crate::ast::*;
-use crate::dialect::keywords::Keyword;
 use crate::dialect::*;
+use crate::keywords::{self, Keyword};
 use crate::tokenizer::*;
 
 #[derive(Debug, Clone, PartialEq)]

src/tokenizer.rs

@@ -31,9 +31,9 @@ use core::str::Chars;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
-use crate::dialect::keywords::{Keyword, ALL_KEYWORDS, ALL_KEYWORDS_INDEX};
 use crate::dialect::Dialect;
 use crate::dialect::SnowflakeDialect;
+use crate::keywords::{Keyword, ALL_KEYWORDS, ALL_KEYWORDS_INDEX};
 
 /// SQL Token enumeration
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]

tests/sqlparser_common.rs

@@ -24,7 +24,8 @@ use test_utils::{all_dialects, expr_from_projection, join, number, only, table,
 
 use matches::assert_matches;
 use sqlparser::ast::*;
-use sqlparser::dialect::{keywords::ALL_KEYWORDS, GenericDialect, SQLiteDialect};
+use sqlparser::dialect::{GenericDialect, SQLiteDialect};
+use sqlparser::keywords::ALL_KEYWORDS;
 use sqlparser::parser::{Parser, ParserError};
 
 #[test]