LBRYCommunity/lbry-sdk
1
0
Fork 1
Code Issues Pull requests Projects Releases 282 Packages Wiki Activity

lazy parse scripts

Browse source
This commit is contained in:
Lex Berezhny 2019-03-18 23:25:00 -04:00
parent 80b65ae7e7
commit 9281bdb61b
1 changed files with 20 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
torba/client/basescript.py
View file

@ -284,19 +284,30 @@ class Template:
class Script: class Script:
__slots__ = 'source', 'template', 'values' __slots__ = 'source', '_template', '_values', '_template_hint'
templates: List[Template] = [] templates: List[Template] = []
def __init__(self, source=None, template=None, values=None, template_hint=None): def __init__(self, source=None, template=None, values=None, template_hint=None):
self.source = source self.source = source
self.template = template self._template = template
self.values = values self._values = values
if source: self._template_hint = template_hint
self.parse(template_hint) if source is None and template and values:
elif template and values:
self.generate() self.generate()
@property
def template(self):
if self._template is None:
self.parse(self._template_hint)
return self._template
@property
def values(self):
if self._values is None:
self.parse(self._template_hint)
return self._values
@property @property
def tokens(self): def tokens(self):
return tokenize(BCDataStream(self.source)) return tokenize(BCDataStream(self.source))
@ -311,15 +322,15 @@ class Script:
if not template: if not template:
continue continue
try: try:
self.values = template.parse(tokens) self._values = template.parse(tokens)
self.template = template self._template = template
return return
except ParseError: except ParseError:
continue continue
raise ValueError('No matching templates for source: {}'.format(hexlify(self.source))) raise ValueError('No matching templates for source: {}'.format(hexlify(self.source)))
def generate(self): def generate(self):
self.source = self.template.generate(self.values) self.source = self.template.generate(self._values)
class BaseInputScript(Script): class BaseInputScript(Script):