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(import os sys warnings
pytest
hy.errors [HySyntaxError HyTypeError HyMacroExpansionError])
(defmacro rev [#* body]
"Execute the `body` statements in reverse"
(quasiquote (do (unquote-splice (list (reversed body))))))
(defmacro mac [x expr]
`(~@expr ~x))
(defn test-macro-call-in-called-lambda []
(assert (= ((fn [] (mac 2 (- 10 1)))) 7)))
(defn test-stararged-native-macro []
(setv x [])
(rev (.append x 1) (.append x 2) (.append x 3))
(assert (= x [3 2 1])))
(defn test-macros-returning-constants []
(defmacro an-int [] 42)
(assert (= (an-int) 42))
(defmacro a-true [] True)
(assert (= (a-true) True))
(defmacro a-false [] False)
(assert (= (a-false) False))
(defmacro a-float [] 42.)
(assert (= (a-float) 42.))
(defmacro a-complex [] 42j)
(assert (= (a-complex) 42j))
(defmacro a-string [] "foo")
(assert (= (a-string) "foo"))
(defmacro a-bytes [] b"foo")
(assert (= (a-bytes) b"foo"))
(defmacro a-list [] [1 2])
(assert (= (a-list) [1 2]))
(defmacro a-tuple [#* b] b)
(assert (= (a-tuple 1 2) #(1 2)))
(defmacro a-dict [] {1 2})
(assert (= (a-dict) {1 2}))
(defmacro a-set [] #{1 2})
(assert (= (a-set) #{1 2}))
(defmacro a-none [])
(assert (= (a-none) None)))
; A macro calling a previously defined function
(eval-when-compile
(defn foo [x y]
(quasiquote (+ (unquote x) (unquote y)))))
(defmacro bar [x y]
(foo x y))
(defn test-macro-kw []
"An error is raised when * or #** is used in a macro"
(with [(pytest.raises HySyntaxError)]
(hy.eval '(defmacro f [* a b])))
(with [(pytest.raises HySyntaxError)]
(hy.eval '(defmacro f [#** kw])))
(with [(pytest.raises HySyntaxError)]
(hy.eval '(defmacro f [a b #* body c]))))
(defn test-macro-bad-name []
(with [e (pytest.raises HySyntaxError)]
(hy.eval '(defmacro :kw [])))
(assert (in "got unexpected token: :kw" e.value.msg))
(with [(pytest.raises HySyntaxError)]
(hy.eval '(defmacro foo.bar []))))
(defn test-macro-calling-fn []
(assert (= 3 (bar 1 2))))
(defn test-optional-and-unpacking-in-macro []
; https://github.com/hylang/hy/issues/1154
(defn f [#* args]
(+ "f:" (repr args)))
(defmacro mac [[x None]]
`(f #* [~x]))
(assert (= (mac) "f:(None,)")))
(defn test-macro-autoboxing-docstring []
(defmacro m []
(setv mystring "hello world")
`(fn [] ~mystring (+ 1 2)))
(setv f (m))
(assert (= (f) 3))
(assert (= f.__doc__ "hello world")))
; Macro that checks a variable defined at compile or load time
(setv phase "load")
(eval-when-compile
(setv phase "compile"))
(defmacro phase-when-compiling [] phase)
(assert (= phase "load"))
(assert (= (phase-when-compiling) "compile"))
(setv initialized False)
(eval-and-compile
(setv initialized True))
(defmacro test-initialized [] initialized)
(assert initialized)
(assert (test-initialized))
(defmacro gensym-example []
`(setv ~(hy.gensym) 1))
(defn test-gensym-in-macros []
; Call `gensym-example` twice, getting a distinct gensym each time.
(defclass C []
(gensym-example)
(gensym-example))
(assert (=
(len (sfor a (dir C) :if (not (.startswith a "__")) a))
2)))
(defn test-macro-errors []
(import traceback
hy.importer [read-many])
(setv test-expr (read-many "(defmacro blah [x] `(print ~@z)) (blah y)"))
(with [excinfo (pytest.raises HyMacroExpansionError)]
(hy.eval test-expr))
(setv output (traceback.format_exception_only
excinfo.type excinfo.value))
(setv output (cut (.splitlines (.strip (get output 0))) 1 None))
(setv expected [" File \"<string>\", line 1"
" (defmacro blah [x] `(print ~@z)) (blah y)"
(hy.compat.reu " ^------^")
"expanding macro blah"
" NameError: global name 'z' is not defined"])
(assert (= (cut expected 0 -1) (cut output 0 -1)))
(assert (or (= (get expected -1) (get output -1))
;; Handle PyPy's peculiarities
(= (.replace (get expected -1) "global " "") (get output -1))))
;; This should throw a `HyWrapperError` that gets turned into a
;; `HyMacroExpansionError`.
(with [excinfo (pytest.raises HyMacroExpansionError)]
(hy.eval '(do (defmacro wrap-error-test []
(fn []))
(wrap-error-test))))
(assert (in "HyWrapperError" (str excinfo.value))))
(defn macro-redefinition-warning-tester [local]
(for [should-warn? [True False] head ["defmacro" "require"]]
(with [(if should-warn?
(pytest.warns RuntimeWarning :match "will shadow the core macro")
(warnings.catch-warnings))]
(when (not should-warn?)
; Elevate any warning to an error.
(warnings.simplefilter "error"))
(hy.eval `(
~@(if local '[defn f []] '[do])
~(if should-warn? None '(pragma :warn-on-core-shadow False))
~(if (= head "defmacro")
'(defmacro when [] 1)
'(require tests.resources.tlib [qplah :as when])))))))
(defn test-macro-redefinition-warning []
(macro-redefinition-warning-tester :local False))
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