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Expand the test coverage, add octals

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This commit is contained in:
Reid 'arrdem' McKenzie 2020-07-18 14:38:28 -06:00
parent 8cd91ecb8c
commit 6a33fa1016
2 changed files with 57 additions and 11 deletions
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44
src/python/flowmetal/parser.py
View file

@ -272,31 +272,54 @@ class Parser(SexpParser):
def parse_sqlist(cls, f: PosTrackingBufferedReader): def parse_sqlist(cls, f: PosTrackingBufferedReader):
return cls.parse_delimeted(f, "[", "]", lambda *args: ListToken(*args, ListType.SQUARE)) return cls.parse_delimeted(f, "[", "]", lambda *args: ListToken(*args, ListType.SQUARE))
# FIXME (arrdem 2020-07-18):
# Break this apart into middleware or composable features somehow?
@classmethod @classmethod
def handle_symbol(cls, buff, pos): def handle_symbol(cls, buff, pos):
# Parsing integers def _sign(m, idx):
if m := re.fullmatch(r"[+-]?\d[\d_]*", buff): if m.group(idx) == '-':
return IntegerToken(int(buff.replace("_", "")), buff, pos) return -1
else:
return 1
# Parsing integers with bases # Parsing integers with bases
elif m := re.fullmatch(r"(\d+)r([a-z0-9_]+)", buff): if m := re.fullmatch(r"([+-]?)(\d+)r([a-z0-9_]+)", buff):
return IntegerToken(int(m.group(2).replace("_", "")), int(m.group(1)), buff, pos) return IntegerToken(
_sign(m, 1) * int(m.group(3).replace("_", ""),
int(m.group(2))),
buff,
pos,
)
# Parsing hex numbers
if m := re.fullmatch(r"([+-]?)0[xX]([A-Fa-f0-9_]*)", buff):
val = m.group(2).replace("_", "")
return IntegerToken(_sign(m, 1) * int(val, 16), buff, pos)
# Parsing octal numbers
if m := re.fullmatch(r"([+-]?)0([\d_]*)", buff):
val = m.group(2).replace("_", "")
return IntegerToken(_sign(m, 1) * int(val, 8), buff, pos)
# Parsing integers
if m := re.fullmatch(r"([+-]?)\d[\d_]*", buff):
return IntegerToken(int(buff.replace("_", "")), buff, pos)
# Parsing fractions # Parsing fractions
elif m := re.fullmatch(r"([+-]?\d[\d_]*)/(\d[\d_]*)", buff): if m := re.fullmatch(r"([+-]?)(\d[\d_]*)/(\d[\d_]*)", buff):
return FractionToken( return FractionToken(
Fraction( Fraction(
int(m.group(1).replace("_", "")), int(m.group(2).replace("_", "")),
int(m.group(2).replace("_", ""))), int(m.group(3).replace("_", ""))),
buff, buff,
pos, pos,
) )
# Parsing floats # Parsing floats
elif re.fullmatch(r"[+-]?\d[\d_]*(\.\d[\d_]*)?(e[+-]?\d[\d_]*)?", buff): if re.fullmatch(r"([+-]?)\d[\d_]*(\.\d[\d_]*)?(e[+-]?\d[\d_]*)?", buff):
return FloatToken(float(buff), buff, pos) return FloatToken(float(buff), buff, pos)
else: # Default behavior
return SymbolToken(buff, buff, pos) return SymbolToken(buff, buff, pos)
@classmethod @classmethod
@ -331,6 +354,7 @@ class Parser(SexpParser):
buff = str(rtb) buff = str(rtb)
return CommentToken(buff, buff, pos) return CommentToken(buff, buff, pos)
## Parsing interface ## Parsing interface
def parses(buff: str, def parses(buff: str,
parser: SexpParser = Parser, parser: SexpParser = Parser,

22
test/python/flowmetal/test_parser.py
View file

@ -20,10 +20,32 @@ def test_parse_list():
('2', 2), ('2', 2),
('103', 103), ('103', 103),
('504', 504), ('504', 504),
# Sign prefixes
('-1', -1), ('-1', -1),
('+1', +1), ('+1', +1),
# Underscores as whitespace
('1_000_000', 1e6),
('+1_000', 1000), ('+1_000', 1000),
('-1_000', -1000), ('-1_000', -1000),
# Variable base
('2r1', 1),
('2r10', 2),
('2r100', 4),
('2r101', 5),
('+2r10', 2),
('-2r10', -2),
# Octal
('00', 0),
('01', 1),
('010', 8),
('+010', 8),
('-010', -8),
# Hex
('0x0', 0),
('0xF', 15),
('0x10', 16),
('+0x10', 16),
('-0x10', -16),
]) ])
def test_parse_num(txt, val): def test_parse_num(txt, val):
"""Some trivial cases of parsing numbers.""" """Some trivial cases of parsing numbers."""