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9c8ad727b5
had to workaround some cruft in the parser that was trying to only support a BETWEEN query as LTE, LTE. Now we have operations for all combinations of LT and LTE. unrelated - changed the port a test was binding to as it conflicted with a port I was using locally.
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
// Copyright 2017 Pilosa Corp.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package pql
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// Token is a lexical token of the PQL language.
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type Token int
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const (
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// Special tokens
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ILLEGAL Token = iota
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ASSIGN // =
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EQ // ==
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NEQ // !=
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LT // <
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LTE // <=
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GT // >
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GTE // >=
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BETWEEN // >< (this is like a <= x <= b)
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// not used in lexing/parsing, but so that the parser can signal
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// to the executor how to treat the arguments. We used to just add
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// 1 to the arguments if they were LT so the executor could assume
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// it was always <=, <=, but then we needed to support
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// floats/decimals and couldn't do that any more.
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BTWN_LT_LTE // a < x <= b
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BTWN_LTE_LT // a <= x < b
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BTWN_LT_LT // a < x < b
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)
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var tokens = [...]string{
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ILLEGAL: "ILLEGAL",
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ASSIGN: "=",
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EQ: "==",
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NEQ: "!=",
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LT: "<",
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LTE: "<=",
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GT: ">",
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GTE: ">=",
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BETWEEN: "><",
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}
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// String returns the string representation of the token.
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func (tok Token) String() string {
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if tok >= 0 && tok < Token(len(tokens)) {
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return tokens[tok]
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}
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return ""
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}
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