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# Copyright 2021 The Meson development team
# SPDX-license-identifier: Apache-2.0
from __future__ import annotations
import re
import os
import typing as T
from ...mesonlib import version_compare
from ...interpreterbase import (
ObjectHolder,
MesonOperator,
FeatureNew,
typed_operator,
noArgsFlattening,
noKwargs,
noPosargs,
typed_pos_args,
InvalidArguments,
)
if T.TYPE_CHECKING:
# Object holders need the actual interpreter
from ...interpreter import Interpreter
from ...interpreterbase import TYPE_var, TYPE_kwargs
class StringHolder(ObjectHolder[str]):
def __init__(self, obj: str, interpreter: 'Interpreter') -> None:
super().__init__(obj, interpreter)
self.methods.update({
'contains': self.contains_method,
'startswith': self.startswith_method,
'endswith': self.endswith_method,
'format': self.format_method,
'join': self.join_method,
'replace': self.replace_method,
'split': self.split_method,
'strip': self.strip_method,
'substring': self.substring_method,
'to_int': self.to_int_method,
'to_lower': self.to_lower_method,
'to_upper': self.to_upper_method,
'underscorify': self.underscorify_method,
'version_compare': self.version_compare_method,
})
self.trivial_operators.update({
# Arithmetic
MesonOperator.PLUS: (str, lambda x: self.held_object + x),
# Comparison
MesonOperator.EQUALS: (str, lambda x: self.held_object == x),
MesonOperator.NOT_EQUALS: (str, lambda x: self.held_object != x),
MesonOperator.GREATER: (str, lambda x: self.held_object > x),
MesonOperator.LESS: (str, lambda x: self.held_object < x),
MesonOperator.GREATER_EQUALS: (str, lambda x: self.held_object >= x),
MesonOperator.LESS_EQUALS: (str, lambda x: self.held_object <= x),
})
# Use actual methods for functions that require additional checks
self.operators.update({
MesonOperator.DIV: self.op_div,
MesonOperator.INDEX: self.op_index,
MesonOperator.IN: self.op_in,
MesonOperator.NOT_IN: self.op_notin,
})
def display_name(self) -> str:
return 'str'
@noKwargs
@typed_pos_args('str.contains', str)
def contains_method(self, args: T.Tuple[str], kwargs: TYPE_kwargs) -> bool:
return self.held_object.find(args[0]) >= 0
@noKwargs
@typed_pos_args('str.startswith', str)
def startswith_method(self, args: T.Tuple[str], kwargs: TYPE_kwargs) -> bool:
return self.held_object.startswith(args[0])
@noKwargs
@typed_pos_args('str.endswith', str)
def endswith_method(self, args: T.Tuple[str], kwargs: TYPE_kwargs) -> bool:
return self.held_object.endswith(args[0])
@noArgsFlattening
@noKwargs
@typed_pos_args('str.format', varargs=object)
def format_method(self, args: T.Tuple[T.List[object]], kwargs: TYPE_kwargs) -> str:
arg_strings: T.List[str] = []
for arg in args[0]:
if isinstance(arg, bool): # Python boolean is upper case.
arg = str(arg).lower()
arg_strings.append(str(arg))
def arg_replace(match: T.Match[str]) -> str:
idx = int(match.group(1))
if idx >= len(arg_strings):
raise InvalidArguments(f'Format placeholder @{idx}@ out of range.')
return arg_strings[idx]
return re.sub(r'@(\d+)@', arg_replace, self.held_object)
@noKwargs
@typed_pos_args('str.join', varargs=str)
def join_method(self, args: T.Tuple[T.List[str]], kwargs: TYPE_kwargs) -> str:
return self.held_object.join(args[0])
@noKwargs
@typed_pos_args('str.replace', str, str)
def replace_method(self, args: T.Tuple[str, str], kwargs: TYPE_kwargs) -> str:
return self.held_object.replace(args[0], args[1])
@noKwargs
@typed_pos_args('str.split', optargs=[str])
def split_method(self, args: T.Tuple[T.Optional[str]], kwargs: TYPE_kwargs) -> T.List[str]:
return self.held_object.split(args[0])
@noKwargs
@typed_pos_args('str.strip', optargs=[str])
def strip_method(self, args: T.Tuple[T.Optional[str]], kwargs: TYPE_kwargs) -> str:
return self.held_object.strip(args[0])
@noKwargs
@typed_pos_args('str.substring', optargs=[int, int])
def substring_method(self, args: T.Tuple[T.Optional[int], T.Optional[int]], kwargs: TYPE_kwargs) -> str:
start = args[0] if args[0] is not None else 0
end = args[1] if args[1] is not None else len(self.held_object)
return self.held_object[start:end]
@noKwargs
@noPosargs
def to_int_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> int:
try:
return int(self.held_object)
except ValueError:
raise InvalidArguments(f'String {self.held_object!r} cannot be converted to int')
@noKwargs
@noPosargs
def to_lower_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> str:
return self.held_object.lower()
@noKwargs
@noPosargs
def to_upper_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> str:
return self.held_object.upper()
@noKwargs
@noPosargs
def underscorify_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> str:
return re.sub(r'[^a-zA-Z0-9]', '_', self.held_object)
@noKwargs
@typed_pos_args('str.version_compare', str)
def version_compare_method(self, args: T.Tuple[str], kwargs: TYPE_kwargs) -> bool:
return version_compare(self.held_object, args[0])
@staticmethod
def _op_div(this: str, other: str) -> str:
return os.path.join(this, other).replace('\\', '/')
@FeatureNew('/ with string arguments', '0.49.0')
@typed_operator(MesonOperator.DIV, str)
def op_div(self, other: str) -> str:
return self._op_div(self.held_object, other)
@typed_operator(MesonOperator.INDEX, int)
def op_index(self, other: int) -> str:
try:
return self.held_object[other]
except IndexError:
raise InvalidArguments(f'Index {other} out of bounds of string of size {len(self.held_object)}.')
@FeatureNew('"in" string operator', '0.64.0')
@typed_operator(MesonOperator.IN, str)
def op_in(self, other: str) -> bool:
return other in self.held_object
@FeatureNew('"not in" string operator', '0.64.0')
@typed_operator(MesonOperator.NOT_IN, str)
def op_notin(self, other: str) -> bool:
return other not in self.held_object
class MesonVersionString(str):
pass
class MesonVersionStringHolder(StringHolder):
@noKwargs
@typed_pos_args('str.version_compare', str)
def version_compare_method(self, args: T.Tuple[str], kwargs: TYPE_kwargs) -> bool:
self.interpreter.tmp_meson_version = args[0]
return version_compare(self.held_object, args[0])
# These special subclasses of string exist to cover the case where a dependency
# exports a string variable interchangeable with a system dependency. This
# matters because a dependency can only have string-type get_variable() return
# values. If at any time dependencies start supporting additional variable
# types, this class could be deprecated.
class DependencyVariableString(str):
pass
class DependencyVariableStringHolder(StringHolder):
def op_div(self, other: str) -> T.Union[str, DependencyVariableString]:
ret = super().op_div(other)
if '..' in other:
return ret
return DependencyVariableString(ret)
class OptionString(str):
optname: str
def __new__(cls, value: str, name: str) -> 'OptionString':
obj = str.__new__(cls, value)
obj.optname = name
return obj
def __getnewargs__(self) -> T.Tuple[str, str]: # type: ignore # because the entire point of this is to diverge
return (str(self), self.optname)
class OptionStringHolder(StringHolder):
held_object: OptionString
def op_div(self, other: str) -> T.Union[str, OptionString]:
ret = super().op_div(other)
name = self._op_div(self.held_object.optname, other)
return OptionString(ret, name)
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