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from dataclasses import dataclass, field
from ...builder import AsyncBuilder
from .base import *
@dataclass(eq=False)
class ReturnFunction(Function):
def export_return_value(self, symbol_table):
assert False
async def export_function_body(self, exporter, builder: AsyncBuilder):
return_value = self.export_return_value(exporter.gst)
await builder.write(f" {{")
if return_value:
await builder.write(f"\treturn {return_value};")
else:
await builder.write(f"\t/* empty function */")
await builder.write(f"}}")
@dataclass(eq=False)
class CustomReturnFunction(ReturnFunction):
return_value: str = None
def export_return_value(self, symbol_table):
return self.return_value
@dataclass(eq=False)
class SymbolReturnFunction(ReturnFunction):
symbol_addr: int = 0
load_or_reference: bool = True
load_type: Type = None
cast_type: Type = None
def gather_references(self, context, valid_range):
self.references = set([ self.symbol_addr ])
def export_return_value(self, symbol_table):
symbol = symbol_table[-1, self.symbol_addr]
assert symbol
name = symbol.cpp_reference(self, self.symbol_addr)
load_type = PointerType(self.load_type)
dereference = ""
cast = ""
if self.load_or_reference:
dereference = "*"
if self.cast_type:
cast = f"({self.cast_type.type()})"
return f"{cast}{dereference}({load_type.type()})({name})"
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