Better document the other condition checks (isDiminished, etc.).

src/libespeak-ng/compiledata.c

 
 	{ "isVel", 0, CONDITION_IS_PLACE_OF_ARTICULATION | phPLACE_VELAR },
 
-	{ "isDiminished",  0, i_isDiminished },
-	{ "isUnstressed",  0, i_isUnstressed },
-	{ "isNotStressed", 0, i_isNotStressed },
-	{ "isStressed",    0, i_isStressed },
-	{ "isMaxStress",   0, i_isMaxStress },
-
-	{ "isPause2",           0, i_isBreak },
-	{ "isWordStart",        0, i_isWordStart },
-	{ "isWordEnd",          0, i_isWordEnd },
-	{ "isAfterStress",      0, i_isAfterStress },
-	{ "isNotVowel",         0, i_isNotVowel },
-	{ "isFinalVowel",       0, i_isFinalVowel },
-	{ "isVoiced",           0, i_isVoiced },   // voiced consonant, or vowel
-	{ "isFirstVowel",       0, i_isFirstVowel },
-	{ "isSecondVowel",      0, i_isSecondVowel },
-	{ "isTranslationGiven", 0, i_IsTranslationGiven },   // phoneme translation given in **_list or as [[...]]
+	{ "isDiminished",  0, CONDITION_IS_OTHER | isDiminished },
+	{ "isUnstressed",  0, CONDITION_IS_OTHER | isUnstressed },
+	{ "isNotStressed", 0, CONDITION_IS_OTHER | isNotStressed },
+	{ "isStressed",    0, CONDITION_IS_OTHER | isStressed },
+	{ "isMaxStress",   0, CONDITION_IS_OTHER | isMaxStress },
+
+	{ "isPause2",           0, CONDITION_IS_OTHER | isBreak },
+	{ "isWordStart",        0, CONDITION_IS_OTHER | isWordStart },
+	{ "isWordEnd",          0, CONDITION_IS_OTHER | isWordEnd },
+	{ "isAfterStress",      0, CONDITION_IS_OTHER | isAfterStress },
+	{ "isNotVowel",         0, CONDITION_IS_OTHER | isNotVowel },
+	{ "isFinalVowel",       0, CONDITION_IS_OTHER | isFinalVowel },
+	{ "isVoiced",           0, CONDITION_IS_OTHER | isVoiced },
+	{ "isFirstVowel",       0, CONDITION_IS_OTHER | isFirstVowel },
+	{ "isSecondVowel",      0, CONDITION_IS_OTHER | isSecondVowel },
+	{ "isTranslationGiven", 0, CONDITION_IS_OTHER | isTranslationGiven },
 
 	{ NULL, 0, 0 }
 };

src/libespeak-ng/synthdata.c

 			return ((ph->phflags >> 16) & 0xf) == data;
 		case CONDITION_IS_PHFLAG_SET:
 			return (ph->phflags & (1 << data)) != 0;
-		case 0x80:
+		case CONDITION_IS_OTHER:
 			switch (data)
 			{
-			case 0:
-			case 1:
-			case 2:
-			case 3:
-			case 4:
+			case isDiminished:
+			case isUnstressed:
+			case isNotStressed:
+			case isStressed:
+			case isMaxStress:
 				return StressCondition(tr, plist, data, 0);
-			case 5: // isBreak, Either pause phoneme, or (stop/vstop/vfric not followed by vowel or (liquid in same word))
+			case isBreak:
 				return (ph->type == phPAUSE) || (plist_this->synthflags & SFLAG_NEXT_PAUSE);
-			case 6: // isWordStart
+			case isWordStart:
 				return plist->sourceix != 0;
-			case 8: // isWordEnd
+			case isWordEnd:
 				return plist[1].sourceix || (plist[1].ph->type == phPAUSE);
-			case 9: // isAfterStress
+			case isAfterStress:
 				if (plist->sourceix != 0)
 					return false;
 				do {
 
 				} while (plist->sourceix == 0);
 				break;
-			case 10: // isNotVowel
+			case isNotVowel:
 				return ph->type != phVOWEL;
-			case 11: // isFinalVowel
+			case isFinalVowel:
 				for (;;) {
 					plist++;
 					if (plist->sourceix != 0)
 					if (plist->ph->type == phVOWEL)
 						return false;
 				}
-			case 12: // isVoiced
+			case isVoiced:
 				return (ph->type == phVOWEL) || (ph->type == phLIQUID) || (ph->phflags & phVOICED);
-			case 13: // isFirstVowel
+			case isFirstVowel:
 				return CountVowelPosition(plist) == 1;
-			case 14: // isSecondVowel
+			case isSecondVowel:
 				return CountVowelPosition(plist) == 2;
-			case 0x10: // isTranslationGiven
+			case isTranslationGiven:
 				return (plist->synthflags & SFLAG_DICTIONARY) != 0;
 			}
 			break;

src/libespeak-ng/synthesize.h

 #define i_WAVADD     0xf000
 
 // conditions
-#define i_isDiminished 0x80
-#define i_isUnstressed 0x81
-#define i_isNotStressed 0x82
-#define i_isStressed   0x83
-#define i_isMaxStress  0x84
-
-#define i_isBreak      0x85
-#define i_isWordStart  0x86
-#define i_isWordEnd    0x88
-#define i_isAfterStress 0x89
-#define i_isNotVowel   0x8a
-#define i_isFinalVowel 0x8b
-#define i_isVoiced     0x8c
-#define i_isFirstVowel 0x8d
-#define i_isSecondVowel 0x8e
-#define i_IsTranslationGiven 0x90
-
 #define CONDITION_IS_PHONEME_TYPE 0x00
 #define CONDITION_IS_PLACE_OF_ARTICULATION 0x20
 #define CONDITION_IS_PHFLAG_SET 0x40
+#define CONDITION_IS_OTHER 0x80
+
+// other conditions
+#define isDiminished   0
+#define isUnstressed   1
+#define isNotStressed  2
+#define isStressed     3
+#define isMaxStress    4
+#define isBreak        5 // pause phoneme or (stop/vstop/vfric not followed by vowel or (liquid in same word))
+#define isWordStart    6
+#define isWordEnd      8
+#define isAfterStress  9
+#define isNotVowel    10
+#define isFinalVowel  11
+#define isVoiced      12 // voiced consonant, or vowel
+#define isFirstVowel  13
+#define isSecondVowel 14
+#define isTranslationGiven 16 // phoneme translation given in **_list or as [[...]]
 
 #define i_StressLevel  0x800