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rust.py
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155 lines (130 loc) · 3.03 KB
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import dataclasses
import re
import typing
import inflection
# taken from https://doc.rust-lang.org/reference/keywords.html
keywords = {
"as",
"break",
"const",
"continue",
"crate",
"else",
"enum",
"extern",
"false",
"fn",
"for",
"if",
"impl",
"in",
"let",
"loop",
"match",
"mod",
"move",
"mut",
"pub",
"ref",
"return",
"self",
"Self",
"static",
"struct",
"super",
"trait",
"true",
"type",
"unsafe",
"use",
"where",
"while",
"async",
"await",
"dyn",
"abstract",
"become",
"box",
"do",
"final",
"macro",
"override",
"priv",
"typeof",
"unsized",
"virtual",
"yield",
"try",
}
def avoid_keywords(s: str) -> str:
return s + "_" if s in keywords else s
_field_overrides = [
(re.compile(r"(.*)_"), lambda m: {"field_name": m[1]}),
]
def get_field_override(field: str):
for r, o in _field_overrides:
m = r.fullmatch(field)
if m:
return o(m) if callable(o) else o
return {}
@dataclasses.dataclass
class Field:
field_name: str
base_type: str
table_name: str
is_optional: bool = False
is_repeated: bool = False
is_unordered: bool = False
is_predicate: bool = False
first: bool = False
def __post_init__(self):
self.field_name = avoid_keywords(self.field_name)
@property
def type(self) -> str:
type = self.base_type
if self.is_optional:
type = f"Option<{type}>"
if self.is_repeated:
type = f"Vec<{type}>"
return type
@property
def is_single(self):
return not (self.is_optional or self.is_repeated or self.is_predicate)
@property
def is_label(self):
return self.base_type == "trap::Label"
@property
def singular_field_name(self) -> str:
return inflection.singularize(self.field_name.rstrip("_"))
@dataclasses.dataclass
class Class:
name: str
entry_table: str | None = None
fields: list[Field] = dataclasses.field(default_factory=list)
detached_fields: list[Field] = dataclasses.field(default_factory=list)
ancestors: list[str] = dataclasses.field(default_factory=list)
@property
def is_entry(self) -> bool:
return bool(self.entry_table)
@property
def single_field_entries(self) -> dict[str, list[dict]]:
ret = {}
if self.is_entry:
ret[self.entry_table] = []
for f in self.fields:
if f.is_single:
ret.setdefault(f.table_name, []).append(f)
return [{"table_name": k, "fields": v} for k, v in ret.items()]
@property
def has_detached_fields(self) -> bool:
return bool(self.detached_fields)
@dataclasses.dataclass
class ClassList:
template: typing.ClassVar[str] = "rust_classes"
classes: list[Class]
source: str
@dataclasses.dataclass
class ModuleList:
template: typing.ClassVar[str] = "rust_module"
modules: list[str]
source: str