Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/parser.py @ 28897:c1f254138f44
parser: add short comment how aliases are expanded in phases
| author | Yuya Nishihara <yuya@tcha.org> |
|---|---|
| date | Tue, 29 Mar 2016 16:30:59 +0900 |
| parents | 4c76a032ec7e |
| children | 8d398155bfda |
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| 28896:4c76a032ec7e | 28897:c1f254138f44 |
|---|---|
| 516 raise error.Abort(a.error) | 516 raise error.Abort(a.error) |
| 517 if a in expanding: | 517 if a in expanding: |
| 518 raise error.ParseError(_('infinite expansion of %(section)s ' | 518 raise error.ParseError(_('infinite expansion of %(section)s ' |
| 519 '"%(name)s" detected') | 519 '"%(name)s" detected') |
| 520 % {'section': cls._section, 'name': a.name}) | 520 % {'section': cls._section, 'name': a.name}) |
| 521 # get cacheable replacement tree by expanding aliases recursively | |
| 521 expanding.append(a) | 522 expanding.append(a) |
| 522 if a.name not in cache: | 523 if a.name not in cache: |
| 523 cache[a.name] = cls._expand(aliases, a.replacement, expanding, | 524 cache[a.name] = cls._expand(aliases, a.replacement, expanding, |
| 524 cache) | 525 cache) |
| 525 result = cache[a.name] | 526 result = cache[a.name] |
| 526 expanding.pop() | 527 expanding.pop() |
| 527 if a.args is None: | 528 if a.args is None: |
| 528 return result | 529 return result |
| 530 # substitute function arguments in replacement tree | |
| 529 l = cls._getlist(tree[2]) | 531 l = cls._getlist(tree[2]) |
| 530 if len(l) != len(a.args): | 532 if len(l) != len(a.args): |
| 531 raise error.ParseError(_('invalid number of arguments: %d') | 533 raise error.ParseError(_('invalid number of arguments: %d') |
| 532 % len(l)) | 534 % len(l)) |
| 533 l = [cls._expand(aliases, t, [], cache) for t in l] | 535 l = [cls._expand(aliases, t, [], cache) for t in l] |