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May 11, 2019
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Use smarter macros to avoid duplication in keywords.rs #63

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381 changes: 24 additions & 357 deletions src/dialect/keywords.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -12,365 +12,32 @@
/// 3) a `RESERVED_FOR_TABLE_ALIAS` array with keywords reserved in a
/// "table alias" context.

macro_rules! keyword {
($($ident:ident),*) => {
$(pub const $ident: &'static str = stringify!($ident);)*
}
/// Defines a string constant for a single keyword: `kw_def!(SELECT);`
/// expands to `pub const SELECT = "SELECT";`
macro_rules! kw_def {
($ident:ident = $string_keyword:expr) => {
pub const $ident: &'static str = $string_keyword;
};
($ident:ident) => {
kw_def!($ident = stringify!($ident));
};
}

keyword!(
ABS,
ADD,
ASC,
ALL,
ALLOCATE,
ALTER,
AND,
ANY,
ARE,
ARRAY,
ARRAY_AGG,
ARRAY_MAX_CARDINALITY,
AS,
ASENSITIVE,
ASYMMETRIC,
AT,
ATOMIC,
AUTHORIZATION,
AVG,
BEGIN,
BEGIN_FRAME,
BEGIN_PARTITION,
BETWEEN,
BIGINT,
BINARY,
BLOB,
BOOLEAN,
BOTH,
BY,
BYTEA,
CALL,
CALLED,
CARDINALITY,
CASCADED,
CASE,
CAST,
CEIL,
CEILING,
CHAR,
CHAR_LENGTH,
CHARACTER,
CHARACTER_LENGTH,
CHECK,
CLOB,
CLOSE,
COALESCE,
COLLATE,
COLLECT,
COLUMN,
COMMIT,
CONDITION,
CONNECT,
CONSTRAINT,
CONTAINS,
CONVERT,
COPY,
CORR,
CORRESPONDING,
COUNT,
COVAR_POP,
COVAR_SAMP,
CREATE,
CROSS,
CSV,
CUBE,
CUME_DIST,
CURRENT,
CURRENT_CATALOG,
CURRENT_DATE,
CURRENT_DEFAULT_TRANSFORM_GROUP,
CURRENT_PATH,
CURRENT_ROLE,
CURRENT_ROW,
CURRENT_SCHEMA,
CURRENT_TIME,
CURRENT_TIMESTAMP,
CURRENT_TRANSFORM_GROUP_FOR_TYPE,
CURRENT_USER,
CURSOR,
CYCLE,
DATE,
DAY,
DEALLOCATE,
DEC,
DECIMAL,
DECLARE,
DEFAULT,
DELETE,
DENSE_RANK,
DEREF,
DESC,
DESCRIBE,
DETERMINISTIC,
DISCONNECT,
DISTINCT,
DOUBLE,
DROP,
DYNAMIC,
EACH,
ELEMENT,
ELSE,
END,
END_FRAME,
END_PARTITION,
EQUALS,
ESCAPE,
EVERY,
EXCEPT,
EXEC,
EXECUTE,
EXISTS,
EXP,
EXTERNAL,
EXTRACT,
FALSE,
FETCH,
FILTER,
FIRST_VALUE,
FLOAT,
FLOOR,
FOLLOWING,
FOR,
FOREIGN,
FRAME_ROW,
FREE,
FROM,
FULL,
FUNCTION,
FUSION,
GET,
GLOBAL,
GRANT,
GROUP,
GROUPING,
GROUPS,
HAVING,
HEADER,
HOLD,
HOUR,
IDENTITY,
IN,
INDICATOR,
INNER,
INOUT,
INSENSITIVE,
INSERT,
INT,
INTEGER,
INTERSECT,
INTERSECTION,
INTERVAL,
INTO,
IS,
JOIN,
KEY,
LAG,
LANGUAGE,
LARGE,
LAST_VALUE,
LATERAL,
LEAD,
LEADING,
LEFT,
LIKE,
LIKE_REGEX,
LIMIT,
LN,
LOCAL,
LOCALTIME,
LOCALTIMESTAMP,
LOCATION,
LOWER,
MATCH,
MATERIALIZED,
MAX,
MEMBER,
MERGE,
METHOD,
MIN,
MINUTE,
MOD,
MODIFIES,
MODULE,
MONTH,
MULTISET,
NATIONAL,
NATURAL,
NCHAR,
NCLOB,
NEW,
NO,
NONE,
NORMALIZE,
NOT,
NTH_VALUE,
NTILE,
NULL,
NULLIF,
NUMERIC,
OBJECT,
OCTET_LENGTH,
OCCURRENCES_REGEX,
OF,
OFFSET,
OLD,
ON,
ONLY,
OPEN,
OR,
ORDER,
OUT,
OUTER,
OVER,
OVERLAPS,
OVERLAY,
PARAMETER,
PARTITION,
PARQUET,
PERCENT,
PERCENT_RANK,
PERCENTILE_CONT,
PERCENTILE_DISC,
PERIOD,
PORTION,
POSITION,
POSITION_REGEX,
POWER,
PRECEDES,
PRECEDING,
PRECISION,
PREPARE,
PRIMARY,
PROCEDURE,
RANGE,
RANK,
READS,
REAL,
RECURSIVE,
REF,
REFERENCES,
REFERENCING,
REGCLASS,
REGR_AVGX,
REGR_AVGY,
REGR_COUNT,
REGR_INTERCEPT,
REGR_R2,
REGR_SLOPE,
REGR_SXX,
REGR_SXY,
REGR_SYY,
RELEASE,
RESULT,
RETURN,
RETURNS,
REVOKE,
RIGHT,
ROLLBACK,
ROLLUP,
ROW,
ROW_NUMBER,
ROWS,
SAVEPOINT,
SCOPE,
SCROLL,
SEARCH,
SECOND,
SELECT,
SENSITIVE,
SESSION_USER,
SET,
SIMILAR,
SMALLINT,
SOME,
SPECIFIC,
SPECIFICTYPE,
SQL,
SQLEXCEPTION,
SQLSTATE,
SQLWARNING,
SQRT,
START,
STATIC,
STDDEV_POP,
STDDEV_SAMP,
STDIN,
STORED,
SUBMULTISET,
SUBSTRING,
SUBSTRING_REGEX,
SUCCEEDS,
SUM,
SYMMETRIC,
SYSTEM,
SYSTEM_TIME,
SYSTEM_USER,
TABLE,
TABLESAMPLE,
TEXT,
THEN,
TIME,
TIMESTAMP,
TIMEZONE_HOUR,
TIMEZONE_MINUTE,
TO,
TRAILING,
TRANSLATE,
TRANSLATE_REGEX,
TRANSLATION,
TREAT,
TRIGGER,
TRUNCATE,
TRIM,
TRIM_ARRAY,
TRUE,
UESCAPE,
UNBOUNDED,
UNION,
UNIQUE,
UNKNOWN,
UNNEST,
UPDATE,
UPPER,
USER,
USING,
UUID,
VALUE,
VALUES,
VALUE_OF,
VAR_POP,
VAR_SAMP,
VARBINARY,
VARCHAR,
VARYING,
VERSIONING,
VIEW,
WHEN,
WHENEVER,
WHERE,
WIDTH_BUCKET,
WINDOW,
WITH,
WITHIN,
WITHOUT,
YEAR,
ZONE
);
/// Expands to a list of `kw_def!()` invocations for each keyword
/// and defines an ALL_KEYWORDS array of the defined constants.
macro_rules! define_keywords {
($(
$ident:ident $(= $string_keyword:expr)?
),*) => {
$(kw_def!($ident $(= $string_keyword)?);)*

/// special case of keyword where the it is an invalid identifier
pub const END_EXEC: &str = "END-EXEC";
pub const ALL_KEYWORDS: &[&str] = &[
$($ident),*
];
}
}

pub const ALL_KEYWORDS: &[&str] = &[
define_keywords!(
ABS,
ADD,
ASC,
Expand Down Expand Up @@ -717,8 +384,8 @@ pub const ALL_KEYWORDS: &[&str] = &[
WITHOUT,
YEAR,
ZONE,
END_EXEC,
];
END_EXEC = "END-EXEC"
);

/// These keywords can't be used as a table alias, so that `FROM table_name alias`
/// can be parsed unambiguously without looking ahead.
Expand Down