120 lines
3.7 KiB
Python
120 lines
3.7 KiB
Python
from typing import *
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from lark import Transformer, Tree, Token
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T = TypeVar("T")
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class Decl:
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name: str
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class Iface(Decl):
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def __init__(self, name: str):
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self.name = name
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class IfaceField: pass
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class IfaceRef: pass
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class Expr: pass
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class NodeRef: pass
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class NodeRefByName(NodeRef):
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def __init__(self, name: str):
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self.name = name
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def __repr__(self) -> str: return f"NodeRefByName({self.name})"
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class Sym: pass
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class SymRename(Sym):
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def __init__(self, name: str, node_ref: NodeRef):
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self.name = name
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self.node_ref = node_ref
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def __repr__(self) -> str: return f"SymRename({self.name} : {self.node_ref})"
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class Equation:
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def __init__(self, lhs: Expr, rhs: Expr):
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self.lhs = lhs
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self.rhs = rhs
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class Variant:
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def __init__(self, prod: List[Sym], equations: List[Equation]):
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self.prod = prod
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self.equations = equations
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def __repr__(self) -> str: return f"Variant({self.prod}, {self.equations})"
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class Node(Decl):
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def __init__(self, name: str, ifaces: List[IfaceRef], variants: List[Variant]):
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self.name = name
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self.ifaces = ifaces
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self.variants = variants
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class ExprDot(Expr):
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def __init__(self, left: Expr, right: Expr):
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self.left = left
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self.right = right
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def __repr__(self) -> str: return f"{self.left}.{self.right}"
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class ExprAdd(Expr):
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def __init__(self, left: Expr, right: Expr):
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self.left = left
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self.right = right
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def __repr__(self) -> str: return f"{self.left} + {self.right}"
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class ExprMul(Expr):
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def __init__(self, left: Expr, right: Expr):
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self.left = left
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self.right = right
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def __repr__(self) -> str: return f"{self.left} * {self.right}"
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class ExprCall(Expr):
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def __init__(self, func: Expr, args: List[Expr]):
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self.func = func
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self.args = args
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def __repr__(self) -> str: return f"{self.func}({self.args})"
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class ExprName(Expr):
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def __init__(self, name: str):
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self.name = name
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def __repr__(self) -> str: return f"{self.name}"
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class Parser(Transformer[List[Decl]]):
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def program(self, items: List[Decl]) -> List[Decl]: return items
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# interfaces
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def iface(self, items: List[Any]) -> Iface:
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[name, fields] = items
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return Iface(name)
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def iface_field(self, items: List[str]) -> IfaceField:
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[name, ty] = items
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return IfaceField()
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def iface_ref(self, items: List[str]) -> str: return items[0]
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def iface_refs(self, items: List[IfaceRef]) -> List[IfaceRef]: return items
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# nodes
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def node(self, items: List[Any]) -> Node:
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[name, ifaces, variants] = items
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return Node(name, ifaces, variants)
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def node_ref_name(self, items: List[str]) -> NodeRefByName: return NodeRefByName(items[0])
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# variants
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def variants(self, items: List[Variant]) -> List[Variant]: return items
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def variant(self, items: List[Any]) -> Variant:
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[prod, equations] = items
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return Variant(prod, equations)
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def prod(self, items: List[Sym]) -> List[Sym]: return items
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def sym_rename(self, items: List[Any]) -> Sym: return SymRename(items[0], items[1])
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# equations
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def equations(self, items: List[Equation]) -> List[Equation]: return items
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def equation_(self, items: List[Equation]) -> Equation: return items[0]
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def equation(self, items: List[Expr]) -> Equation: return Equation(items[0], items[1])
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# expr
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def expr_dot(self, items: List[Expr]) -> Expr:
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[left, right] = items
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return ExprDot(left, right)
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def expr_add(self, items: List[Expr]) -> Expr:
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[left, right] = items
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return ExprAdd(left, right)
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def expr_mul(self, items: List[Expr]) -> Expr:
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[left, right] = items
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return ExprMul(left, right)
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def expr_call(self, items: List[Expr]) -> Expr:
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[func, args] = items
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return ExprMul(func, args)
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def sep_trail(self, items: List[Tree]) -> List[T]:
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return list(map(lambda it: cast(T, it), items))
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def ident(self, items: List[Token]) -> str: return cast(str, items[0].value)
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