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1 # Copyright 2017 The Chromium Authors. All rights reserved. | 1 # Copyright 2017 The Chromium Authors. All rights reserved. |
2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 """Logic for parsing a C/C++ function signature.""" | 5 """Logic for parsing a C/C++ function signature.""" |
6 | 6 |
7 | 7 |
8 def _FindParameterListParen(name): | 8 def _FindParameterListParen(name): |
9 """Finds index of the "(" that denotes the start of a paremeter list.""" | 9 """Finds index of the "(" that denotes the start of a paremeter list.""" |
10 # This loops from left-to-right, but the only reason (I think) that this | 10 # This loops from left-to-right, but the only reason (I think) that this |
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36 template_balance_count += 1 | 36 template_balance_count += 1 |
37 | 37 |
38 paren_balance_count += ( | 38 paren_balance_count += ( |
39 name.count('(', start_idx, idx) - name.count(')', start_idx, idx)) | 39 name.count('(', start_idx, idx) - name.count(')', start_idx, idx)) |
40 if template_balance_count == 0 and paren_balance_count == 0: | 40 if template_balance_count == 0 and paren_balance_count == 0: |
41 # Special case: skip "(anonymous namespace)". | 41 # Special case: skip "(anonymous namespace)". |
42 if -1 != name.find('(anonymous namespace)', idx, idx + 21): | 42 if -1 != name.find('(anonymous namespace)', idx, idx + 21): |
43 start_idx = idx + 21 | 43 start_idx = idx + 21 |
44 continue | 44 continue |
45 # Special case: skip "decltype (...)" | 45 # Special case: skip "decltype (...)" |
46 if name[idx - 1] != ' ': | 46 # Special case: skip "{lambda(PaintOp*)#63}" |
| 47 if name[idx - 1] != ' ' and name[idx - 7:idx] != '{lambda': |
47 return idx | 48 return idx |
48 start_idx = idx + 1 | 49 start_idx = idx + 1 |
49 paren_balance_count += 1 | 50 paren_balance_count += 1 |
50 | 51 |
51 | 52 |
52 def _FindLastCharOutsideOfBrackets(name, target_char, prev_idx=None): | 53 def _FindLastCharOutsideOfBrackets(name, target_char, prev_idx=None): |
53 """Returns the last index of |target_char| that is not within ()s nor <>s.""" | 54 """Returns the last index of |target_char| that is not within ()s nor <>s.""" |
54 paren_balance_count = 0 | 55 paren_balance_count = 0 |
55 template_balance_count = 0 | 56 template_balance_count = 0 |
56 while True: | 57 while True: |
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78 space_idx = _FindLastCharOutsideOfBrackets(name, ' ', space_idx) | 79 space_idx = _FindLastCharOutsideOfBrackets(name, ' ', space_idx) |
79 # Special case: "operator new", and "operator<< <template>". | 80 # Special case: "operator new", and "operator<< <template>". |
80 if -1 == space_idx or ( | 81 if -1 == space_idx or ( |
81 -1 == name.find('operator', space_idx - 8, space_idx) and | 82 -1 == name.find('operator', space_idx - 8, space_idx) and |
82 -1 == name.find('operator<<', space_idx - 10, space_idx)): | 83 -1 == name.find('operator<<', space_idx - 10, space_idx)): |
83 break | 84 break |
84 space_idx -= 8 | 85 space_idx -= 8 |
85 return space_idx | 86 return space_idx |
86 | 87 |
87 | 88 |
| 89 def _NormalizeTopLevelLambda(name, space_idx, left_paren_idx): |
| 90 # cc::{lambda(PaintOp*)#63}::_FUN() -> cc:{lambda#63}() |
| 91 paren_idx = name.index('(', space_idx + 1) |
| 92 hash_idx = name.rindex('#', paren_idx) |
| 93 return (name[:paren_idx] + name[hash_idx:left_paren_idx - 6] + |
| 94 name[left_paren_idx:]) |
| 95 |
| 96 |
88 def Parse(name): | 97 def Parse(name): |
89 """Extracts a function name from a function signature. | 98 """Extracts a function name from a function signature. |
90 | 99 |
91 See unit tests for example signatures. | 100 See unit tests for example signatures. |
92 | 101 |
93 Returns: | 102 Returns: |
94 A tuple of (name_without_return_type, name_without_return_type_and_params). | 103 A tuple of (name_without_return_type, name_without_return_type_and_params). |
95 """ | 104 """ |
96 left_paren_idx = _FindParameterListParen(name) | 105 left_paren_idx = _FindParameterListParen(name) |
97 | 106 |
| 107 full_name = name |
98 if left_paren_idx > 0: | 108 if left_paren_idx > 0: |
99 right_paren_idx = name.rindex(')') | 109 right_paren_idx = name.rindex(')') |
100 assert right_paren_idx > left_paren_idx | 110 assert right_paren_idx > left_paren_idx |
101 space_idx = _FindReturnValueSpace(name, left_paren_idx) | 111 space_idx = _FindReturnValueSpace(name, left_paren_idx) |
102 return (name[space_idx + 1:], | 112 name_without_attrib = name[space_idx + 1:left_paren_idx] |
103 name[space_idx + 1:left_paren_idx] + name[right_paren_idx + 1:]) | 113 # Special case for top-level lamdas. |
104 return name, name | 114 if name_without_attrib.endswith('}::_FUN'): |
| 115 # Don't use name_without_attrib in here since prior _idx will be off if |
| 116 # there was a return value. |
| 117 name = _NormalizeTopLevelLambda(name, space_idx, left_paren_idx) |
| 118 return Parse(name) |
| 119 |
| 120 full_name = name[space_idx + 1:] |
| 121 name = name_without_attrib + name[right_paren_idx + 1:] |
| 122 |
| 123 return full_name, name |
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