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619b63d5f7
Reviewed By: idoshveki Differential Revision: D16687892 fbshipit-source-id: e8cfaaf1241e94c2de0a9fe9077326339d593716
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
package gen
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// Op is a predicate for the where clause.
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type Op int
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// List of all builtin predicates.
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const (
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EQ Op = iota // =
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NEQ // <>
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GT // >
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GTE // >=
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LT // <
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LTE // <=
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IsNil // IS NULL / has
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NotNil // IS NOT NULL / hasNot
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In // within
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NotIn // without
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Contains // containing
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HasPrefix // startingWith
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HasSuffix // endingWith
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)
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// Name returns the string representation of an predicate.
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func (o Op) Name() string {
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if int(o) < len(opText) {
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return opText[o]
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}
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return "Unknown"
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}
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// Variadic reports if the predicate is a variadic function.
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func (o Op) Variadic() bool {
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return o == In || o == NotIn
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}
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// Niladic reports if the predicate is a niladic predicate.
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func (o Op) Niladic() bool {
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return o == IsNil || o == NotNil
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}
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var (
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// operations text.
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opText = [...]string{
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EQ: "EQ",
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NEQ: "NEQ",
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GT: "GT",
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GTE: "GTE",
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LT: "LT",
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LTE: "LTE",
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IsNil: "IsNil",
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NotNil: "NotNil",
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Contains: "Contains",
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HasPrefix: "HasPrefix",
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HasSuffix: "HasSuffix",
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In: "In",
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NotIn: "NotIn",
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}
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// operations per type.
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boolOps = []Op{EQ, NEQ}
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numericOps = append(boolOps[:], GT, GTE, LT, LTE, In, NotIn)
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stringOps = append(numericOps[:], Contains, HasPrefix, HasSuffix)
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nillableOps = []Op{IsNil, NotNil}
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)
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