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!7 p-exp { assertEqualsVerbose(true, checkNTokenHygiene("{a b} {c d}")); assertEqualsVerbose(false, checkNTokenHygiene("a b} {c d}")); assertEqualsVerbose(false, checkNTokenHygiene("{a b} {c d")); assertEqualsVerbose(true, checkNTokenHygiene("a b c d")); assertEqualsVerbose(false, checkNTokenHygiene("c d}")); assertEqualsVerbose(false, checkNTokenHygiene("c d}{")); assertEqualsVerbose(true, checkNTokenHygiene("{c d}{")); assertEqualsVerbose(true, checkNTokenHygiene("}{c d}")); assertEqualsVerbose(false, checkNTokenHygiene("{a b")); } sbool checkNTokenHygiene(S s) { L<S> tok = javaTokNPunctuation(s); if (l(tok) == 1) true; ret print("checkForward " + sfu(tok) + ": ", checkForward(tok)) && print("checkBackward " + sfu(tok) + ": ", checkBackward(tok)); } sbool checkForward(L<S> tok) { int level = 0; for (int i = 0; i < l(tok)-1; i += 2) { S t = tok.get(i); print("t=" + quote(t)); for (char c : characters(t)) if (c == '{') ++level; else if (c == '}') level = max(0, level-1); } if (level == 0) true; for (char c : characters(last(tok))) if (c == '}') if (--level == 0) true; false; } sbool checkBackward(L<S> tok) { int level = 0; for (int i = l(tok)-1; i > 0; i -= 2) { S t = tok.get(i); for (char c : reversedCharacters(print("tok", tok.get(i)))) if (c == '}') ++level; else if (c == '{') level = max(0, level-1); } print("level at beginning: " + level); if (level == 0) true; for (char c : reversedCharacters(first(tok))) if (c == '{') if (--level == 0) true; false; }
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Snippet ID: | #1017480 |
Snippet name: | Test grouping hygiene [OK, but not that useful maybe] |
Eternal ID of this version: | #1017480/12 |
Text MD5: | 7c41b09e700f40e354893599a7e0d9ee |
Transpilation MD5: | 93f17095b9a277a547dfa7f33ca3c4d0 |
Author: | stefan |
Category: | javax / a.i. |
Type: | JavaX source code (desktop) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2018-07-23 21:59:26 |
Source code size: | 1640 bytes / 50 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 462 / 1047 |
Version history: | 11 change(s) |
Referenced in: | [show references] |