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vsphere-influxdb-go/vendor/github.com/influxdata/influxdb/influxql/token.go

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2017-10-25 22:52:40 +02:00
package influxql
import (
"strings"
)
// Token is a lexical token of the InfluxQL language.
type Token int
// These are a comprehensive list of InfluxQL language tokens.
const (
// ILLEGAL Token, EOF, WS are Special InfluxQL tokens.
ILLEGAL Token = iota
EOF
WS
COMMENT
literalBeg
// IDENT and the following are InfluxQL literal tokens.
IDENT // main
BOUNDPARAM // $param
NUMBER // 12345.67
INTEGER // 12345
DURATIONVAL // 13h
STRING // "abc"
BADSTRING // "abc
BADESCAPE // \q
TRUE // true
FALSE // false
REGEX // Regular expressions
BADREGEX // `.*
literalEnd
operatorBeg
// ADD and the following are InfluxQL Operators
ADD // +
SUB // -
MUL // *
DIV // /
MOD // %
BITWISE_AND // &
BITWISE_OR // |
BITWISE_XOR // ^
AND // AND
OR // OR
EQ // =
NEQ // !=
EQREGEX // =~
NEQREGEX // !~
LT // <
LTE // <=
GT // >
GTE // >=
operatorEnd
LPAREN // (
RPAREN // )
COMMA // ,
COLON // :
DOUBLECOLON // ::
SEMICOLON // ;
DOT // .
keywordBeg
// ALL and the following are InfluxQL Keywords
ALL
ALTER
ANY
AS
ASC
BEGIN
BY
CREATE
CONTINUOUS
DATABASE
DATABASES
DEFAULT
DELETE
DESC
DESTINATIONS
DIAGNOSTICS
DISTINCT
DROP
DURATION
END
EVERY
EXPLAIN
FIELD
FOR
FROM
GRANT
GRANTS
GROUP
GROUPS
IN
INF
INSERT
INTO
KEY
KEYS
KILL
LIMIT
MEASUREMENT
MEASUREMENTS
NAME
OFFSET
ON
ORDER
PASSWORD
POLICY
POLICIES
PRIVILEGES
QUERIES
QUERY
READ
REPLICATION
RESAMPLE
RETENTION
REVOKE
SELECT
SERIES
SET
SHOW
SHARD
SHARDS
SLIMIT
SOFFSET
STATS
SUBSCRIPTION
SUBSCRIPTIONS
TAG
TO
USER
USERS
VALUES
WHERE
WITH
WRITE
keywordEnd
)
var tokens = [...]string{
ILLEGAL: "ILLEGAL",
EOF: "EOF",
WS: "WS",
IDENT: "IDENT",
NUMBER: "NUMBER",
DURATIONVAL: "DURATIONVAL",
STRING: "STRING",
BADSTRING: "BADSTRING",
BADESCAPE: "BADESCAPE",
TRUE: "TRUE",
FALSE: "FALSE",
REGEX: "REGEX",
ADD: "+",
SUB: "-",
MUL: "*",
DIV: "/",
MOD: "%",
BITWISE_AND: "&",
BITWISE_OR: "|",
BITWISE_XOR: "^",
AND: "AND",
OR: "OR",
EQ: "=",
NEQ: "!=",
EQREGEX: "=~",
NEQREGEX: "!~",
LT: "<",
LTE: "<=",
GT: ">",
GTE: ">=",
LPAREN: "(",
RPAREN: ")",
COMMA: ",",
COLON: ":",
DOUBLECOLON: "::",
SEMICOLON: ";",
DOT: ".",
ALL: "ALL",
ALTER: "ALTER",
ANY: "ANY",
AS: "AS",
ASC: "ASC",
BEGIN: "BEGIN",
BY: "BY",
CREATE: "CREATE",
CONTINUOUS: "CONTINUOUS",
DATABASE: "DATABASE",
DATABASES: "DATABASES",
DEFAULT: "DEFAULT",
DELETE: "DELETE",
DESC: "DESC",
DESTINATIONS: "DESTINATIONS",
DIAGNOSTICS: "DIAGNOSTICS",
DISTINCT: "DISTINCT",
DROP: "DROP",
DURATION: "DURATION",
END: "END",
EVERY: "EVERY",
EXPLAIN: "EXPLAIN",
FIELD: "FIELD",
FOR: "FOR",
FROM: "FROM",
GRANT: "GRANT",
GRANTS: "GRANTS",
GROUP: "GROUP",
GROUPS: "GROUPS",
IN: "IN",
INF: "INF",
INSERT: "INSERT",
INTO: "INTO",
KEY: "KEY",
KEYS: "KEYS",
KILL: "KILL",
LIMIT: "LIMIT",
MEASUREMENT: "MEASUREMENT",
MEASUREMENTS: "MEASUREMENTS",
NAME: "NAME",
OFFSET: "OFFSET",
ON: "ON",
ORDER: "ORDER",
PASSWORD: "PASSWORD",
POLICY: "POLICY",
POLICIES: "POLICIES",
PRIVILEGES: "PRIVILEGES",
QUERIES: "QUERIES",
QUERY: "QUERY",
READ: "READ",
REPLICATION: "REPLICATION",
RESAMPLE: "RESAMPLE",
RETENTION: "RETENTION",
REVOKE: "REVOKE",
SELECT: "SELECT",
SERIES: "SERIES",
SET: "SET",
SHOW: "SHOW",
SHARD: "SHARD",
SHARDS: "SHARDS",
SLIMIT: "SLIMIT",
SOFFSET: "SOFFSET",
STATS: "STATS",
SUBSCRIPTION: "SUBSCRIPTION",
SUBSCRIPTIONS: "SUBSCRIPTIONS",
TAG: "TAG",
TO: "TO",
USER: "USER",
USERS: "USERS",
VALUES: "VALUES",
WHERE: "WHERE",
WITH: "WITH",
WRITE: "WRITE",
}
var keywords map[string]Token
func init() {
keywords = make(map[string]Token)
for tok := keywordBeg + 1; tok < keywordEnd; tok++ {
keywords[strings.ToLower(tokens[tok])] = tok
}
for _, tok := range []Token{AND, OR} {
keywords[strings.ToLower(tokens[tok])] = tok
}
keywords["true"] = TRUE
keywords["false"] = FALSE
}
// String returns the string representation of the token.
func (tok Token) String() string {
if tok >= 0 && tok < Token(len(tokens)) {
return tokens[tok]
}
return ""
}
// Precedence returns the operator precedence of the binary operator token.
func (tok Token) Precedence() int {
switch tok {
case OR:
return 1
case AND:
return 2
case EQ, NEQ, EQREGEX, NEQREGEX, LT, LTE, GT, GTE:
return 3
case ADD, SUB, BITWISE_OR, BITWISE_XOR:
return 4
case MUL, DIV, MOD, BITWISE_AND:
return 5
}
return 0
}
// isOperator returns true for operator tokens.
func (tok Token) isOperator() bool { return tok > operatorBeg && tok < operatorEnd }
// tokstr returns a literal if provided, otherwise returns the token string.
func tokstr(tok Token, lit string) string {
if lit != "" {
return lit
}
return tok.String()
}
// Lookup returns the token associated with a given string.
func Lookup(ident string) Token {
if tok, ok := keywords[strings.ToLower(ident)]; ok {
return tok
}
return IDENT
}
// Pos specifies the line and character position of a token.
// The Char and Line are both zero-based indexes.
type Pos struct {
Line int
Char int
}