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Enhance type‐narrowing support via TypeGuard utilities #805

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Enhance type‐narrowing support via TypeGuard utilities #805

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45 changes: 45 additions & 0 deletions pysmt/typeguard.py
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Original file line number Diff line number Diff line change
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from typing import Optional
from typing_extensions import TypeGuard
from pysmt.typing import (
PySMTType,
_BoolType,
_RealType,
_IntType,
_BVType,
_ArrayType,
_StringType,
_FunctionType,
_TypeDecl,
)


def is_bool_type(type: "PySMTType") -> TypeGuard["_BoolType"]:
return type.is_bool_type()


def is_real_type(type: "PySMTType") -> TypeGuard["_RealType"]:
return type.is_real_type()


def is_int_type(type: "PySMTType") -> TypeGuard["_IntType"]:
return type.is_int_type()


def is_bv_type(type: "PySMTType", width: Optional[int] = None) -> TypeGuard["_BVType"]:
return type.is_bv_type(width)


def is_array_type(type: "PySMTType") -> TypeGuard["_ArrayType"]:
return type.is_array_type()


def is_string_type(type: "PySMTType") -> TypeGuard["_StringType"]:
return type.is_string_type()


def is_function_type(type: "PySMTType") -> TypeGuard["_FunctionType"]:
return type.is_function_type()


def is_custom_type(type: "PySMTType") -> TypeGuard["_TypeDecl"]:
return type.custom_type
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