def compile(self):
"""
Emit code for this parser as a function into the global context.
"""
t_env = TemplateEnvironment()
t_env._self = self
# Don't emit code twice for the same parser
if self.gen_fn_name in get_context().fns:
return
get_context().fns.add(self.gen_fn_name)
t_env.parser_context = (
self.generate_code()
)
get_context().generated_parsers.append(GeneratedParser(
self.gen_fn_name,
render('parsers/fn_profile_ada', t_env),
render('parsers/fn_code_ada', t_env)))
def generate_code(self, pos_name="pos"):
t_env = TemplateEnvironment(pos_name=pos_name)
t_env._self = self
t_env.pos, t_env.res = gen_names("row_pos", "row_res")
decls = [(t_env.pos, Token)]
t_env.subresults = list(gen_names(*[
"row_subres_{0}".format(i)
for i in range(len(self.parsers))
]))
t_env.exit_label = gen_name("row_exit_label")
self.args = [r for r, m in zip(t_env.subresults, self.parsers)
if not m.discard()]
self.allargs = [r for r, m in zip(t_env.subresults, self.parsers)]
bodies = []
for i, (parser, subresult) in enumerate(zip(self.parsers,
t_env.subresults)):
t_subenv = TemplateEnvironment(
t_env, parser=parser, subresult=subresult, i=i,
parser_context=parser.gen_code_or_fncall(t_env.pos)
)
decls += t_subenv.parser_context.var_defs
if not parser.discard():
decls.append((subresult, parser.get_type()))
bodies.append(render('parsers/row_submatch_ada', t_subenv))
code = render('parsers/row_code_ada', t_env, body='\n'.join(bodies))
return ParserCodeContext(
pos_var_name=t_env.pos,
res_var_name=t_env.res,
code=code,
var_defs=decls
)
