68a82a2298
When the return type's rendering already doesn't end with an identifier character, such as when it's `T *`, then idiomatic syntax does not include a space before the `(` and arguments.
93 lines
2.9 KiB
Python
93 lines
2.9 KiB
Python
# ====-- Function class for libc function headers -------------*- python -*--==#
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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# ==-------------------------------------------------------------------------==#
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import re
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from functools import total_ordering
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from type import Type
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# These are the keywords that appear in C type syntax but are not part of the
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# include file name. This is all of the modifiers, qualifiers, and base types,
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# but not "struct".
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KEYWORDS = [
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"_Atomic",
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"_Complex",
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"_Float16",
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"_Noreturn",
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"__restrict",
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"accum",
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"char",
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"const",
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"double",
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"float",
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"fract",
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"int",
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"long",
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"short",
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"signed",
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"unsigned",
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"void",
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"volatile",
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]
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NONIDENTIFIER = re.compile("[^a-zA-Z0-9_]+")
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@total_ordering
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class Function:
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def __init__(
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self, return_type, name, arguments, standards, guard=None, attributes=[]
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):
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assert return_type
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self.return_type = return_type
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self.name = name
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self.arguments = [
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arg if isinstance(arg, str) else arg["type"] for arg in arguments
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]
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assert all(self.arguments)
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self.standards = standards
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self.guard = guard
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self.attributes = attributes or []
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def __eq__(self, other):
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return self.name == other.name
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def __lt__(self, other):
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return self.name < other.name
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def __hash__(self):
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return self.name.__hash__()
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def signature_types(self):
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def collapse(type_string):
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assert type_string
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# Split into words at nonidentifier characters (`*`, `[`, etc.),
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# filter out keywords and numbers, and then rejoin with "_".
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return "_".join(
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word
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for word in NONIDENTIFIER.split(type_string)
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if word and not word.isdecimal() and word not in KEYWORDS
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)
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all_types = [self.return_type] + self.arguments
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return {
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Type(string) for string in filter(None, (collapse(t) for t in all_types))
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}
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def __str__(self):
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attrs_str = "".join(f"{attr} " for attr in self.attributes)
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arguments_str = ", ".join(self.arguments) if self.arguments else "void"
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# The rendering of the return type may look like `int` or it may look
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# like `int *` (and other examples). For `int`, a space is always
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# needed to separate the tokens. For `int *`, no whitespace matters to
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# the syntax one way or the other, but an extra space between `*` and
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# the function identifier is not the canonical style.
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type_str = str(self.return_type)
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if type_str[-1].isalnum() or type_str[-1] == "_":
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type_str += " "
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return attrs_str + type_str + self.name + "(" + arguments_str + ")"
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