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fixes #459 by making all operators variadic

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except for := and the various :<> variants

some operators only make sense in binary usage and will produce invalid
SQL if used in a non-binary manner
This commit is contained in:
Sean Corfield 2023-02-11 13:34:39 -08:00
parent f8532dfd33
commit 6324eca4fc
1 changed files with 4 additions and 7 deletions
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11
doc/extending-honeysql.md
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@ -82,16 +82,13 @@ You might have:
`honey.sql/register-op!` accepts a keyword (or a symbol) that `honey.sql/register-op!` accepts a keyword (or a symbol) that
should be treated as a new infix operator. should be treated as a new infix operator.
By default, operators are treated as strictly binary -- All operators are treated as variadic and an exception will be
accepting just two arguments -- and an exception will be thrown if they are provided no arguments:
thrown if they are provided less than two or more than
two arguments. You can optionally specify that an operator
can take any number of arguments with `:variadic true`:
```clojure ```clojure
(require '[honey.sql :as sql]) (require '[honey.sql :as sql])
(sql/register-op! :<=> :variadic true) (sql/register-op! :<=>)
;; and then use the new operator: ;; and then use the new operator:
(sql/format {:select [:*], :from [:table], :where [:<=> 13 :x 42]}) (sql/format {:select [:*], :from [:table], :where [:<=> 13 :x 42]})
;; will produce: ;; will produce:
@ -106,7 +103,7 @@ such `nil` expressions. You can specify `:ignore-nil true`
to achieve that: to achieve that:
```clojure ```clojure
(sql/register-op! :<=> :variadic true :ignore-nil true) (sql/register-op! :<=> :ignore-nil true)
;; and then use the new operator: ;; and then use the new operator:
(sql/format {:select [:*], :from [:table], :where [:<=> nil :x 42]}) (sql/format {:select [:*], :from [:table], :where [:<=> nil :x 42]})
;; will produce: ;; will produce: