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Mangle trailing bangs on symbols

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Postfixing functions with a bang, like set!, get!, etc are relatively
common. However, those names are not valid in python, so in the name of
python interoperability, lets mangle them to set_bang and get_bang,
respectively.

Closes #536.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
This commit is contained in:
Gergely Nagy 2015-08-10 14:37:17 +02:00
parent 2665b316cf
commit 73f8a47f65
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GPG Key ID: 0A083C5F06E0DD42
2 changed files with 21 additions and 0 deletions
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3
hy/lex/parser.py
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@ -308,6 +308,9 @@ def t_identifier(p):
if p.endswith("?") and p != "?":
p = "is_%s" % (p[:-1])
if p.endswith("!") and p != "!":
p = "%s_bang" % (p[:-1])
return p
obj = ".".join([mangle(part) for part in obj.split(".")])

18
tests/lex/test_lex.py
View File

@ -326,6 +326,24 @@ def test_lex_mangling_qmark():
assert entry == [HySymbol(".is_foo.bar.is_baz")]
def test_lex_mangling_bang():
"""Ensure that identifiers ending with a bang get mangled ok"""
entry = tokenize("foo!")
assert entry == [HySymbol("foo_bang")]
entry = tokenize("!")
assert entry == [HySymbol("!")]
entry = tokenize("im!foo")
assert entry == [HySymbol("im!foo")]
entry = tokenize(".foo!")
assert entry == [HySymbol(".foo_bang")]
entry = tokenize("foo.bar!")
assert entry == [HySymbol("foo.bar_bang")]
entry = tokenize("foo!.bar")
assert entry == [HySymbol("foo_bang.bar")]
entry = tokenize(".foo!.bar.baz!")
assert entry == [HySymbol(".foo_bang.bar.baz_bang")]
def test_simple_cons():
"""Check that cons gets tokenized correctly"""
entry = tokenize("(a . b)")[0]