#
# Copyright (C) 2002-2013, International Business Machines Corporation and others.
# All Rights Reserved.
#
# file: char.txt
#
# ICU Character Break Rules, also known as Grapheme Cluster Boundaries
# See Unicode Standard Annex #29.
# These rules are based on UAX #29 Revision 20 for Unicode Version 6.2
#
#
# Character Class Definitions.
#
$CR = [\p{Grapheme_Cluster_Break = CR}];
$LF = [\p{Grapheme_Cluster_Break = LF}];
$Control = [\p{Grapheme_Cluster_Break = Control}];
# TODO: Restore if the Prepend set becomes non-empty again: $Prepend = [\p{Grapheme_Cluster_Break = Prepend}];
$Extend = [\p{Grapheme_Cluster_Break = Extend}];
$SpacingMark = [\p{Grapheme_Cluster_Break = SpacingMark}];
$RI_A = \U0001F1E6; # Trail ERTU
$RI_B = \U0001F1E7; # Trail EGR
$RI_C = \U0001F1E8; # Trail AHLNZ
$RI_D = \U0001F1E9; # Trail EK
$RI_E = \U0001F1EA; # Trail GS
$RI_F = \U0001F1EB; # Trail IR
$RI_G = \U0001F1EC; # Trail BR
$RI_H = \U0001F1ED; # Trail KU
$RI_I = \U0001F1EE; # Trail DLNT
$RI_J = \U0001F1EF; # Trail OP
$RI_K = \U0001F1F0; # Trail R
$RI_L = \U0001F1F1; # Trail B
$RI_M = \U0001F1F2; # Trail OXY
$RI_N = \U0001F1F3; # Trail LO
$RI_P = \U0001F1F5; # Trail LT
$RI_R = \U0001F1F7; # Trail OU
$RI_S = \U0001F1F8; # Trail AEGK
$RI_T = \U0001F1F9; # Trail HRW
$RI_U = \U0001F1FA; # Trail AS
$RI_V = \U0001F1FB; # Trail N
$RI_A_End = [\U0001F1EA \U0001F1F7 \U0001F1F9 \U0001F1FA]; # ERTU
$RI_B_End = [\U0001F1EA \U0001F1EC \U0001F1F7]; # EGR
$RI_C_End = [\U0001F1E6 \U0001F1ED \U0001F1F1 \U0001F1F3 \U0001F1FF]; # AHLNZ
$RI_D_End = [\U0001F1EA \U0001F1F0]; # EK
$RI_E_End = [\U0001F1EC \U0001F1F8]; # GS
$RI_F_End = [\U0001F1EE \U0001F1F7]; # IR
$RI_G_End = [\U0001F1E7 \U0001F1F7]; # BR
$RI_H_End = [\U0001F1F0 \U0001F1FA]; # KU
$RI_I_End = [\U0001F1E9 \U0001F1F1 \U0001F1F3 \U0001F1F9]; # DLNT
$RI_J_End = [\U0001F1F4 \U0001F1F5]; # OP
$RI_K_End = \U0001F1F7; # R
$RI_L_End = \U0001F1E7; # B
$RI_M_End = [\U0001F1F4 \U0001F1FD \U0001F1FE]; # OXY
$RI_N_End = [\U0001F1F1 \U0001F1F4]; # LO
$RI_P_End = [\U0001F1F1 \U0001F1F9]; # LT
$RI_R_End = [\U0001F1F4 \U0001F1FA]; # OU
$RI_S_End = [\U0001F1E6 \U0001F1EA \U0001F1EC \U0001F1F0]; # AEGK
$RI_T_End = [\U0001F1ED \U0001F1F7 \U0001F1FC]; # HRW
$RI_U_End = [\U0001F1E6 \U0001F1F8]; # AS
$RI_V_End = \U0001F1F3; # N
#
# Korean Syllable Definitions
#
$L = [\p{Grapheme_Cluster_Break = L}];
$V = [\p{Grapheme_Cluster_Break = V}];
$T = [\p{Grapheme_Cluster_Break = T}];
$LV = [\p{Grapheme_Cluster_Break = LV}];
$LVT = [\p{Grapheme_Cluster_Break = LVT}];
## -------------------------------------------------
!!chain;
!!forward;
$CR $LF;
$L ($L | $V | $LV | $LVT);
($LV | $V) ($V | $T);
($LVT | $T) $T;
$RI_A $RI_A_End;
$RI_B $RI_B_End;
$RI_C $RI_C_End;
$RI_D $RI_D_End;
$RI_E $RI_E_End;
$RI_F $RI_F_End;
$RI_G $RI_G_End;
$RI_H $RI_H_End;
$RI_I $RI_I_End;
$RI_J $RI_J_End;
$RI_K $RI_K_End;
$RI_L $RI_L_End;
$RI_M $RI_M_End;
$RI_N $RI_N_End;
$RI_P $RI_P_End;
$RI_R $RI_R_End;
$RI_S $RI_S_End;
$RI_T $RI_T_End;
$RI_U $RI_U_End;
$RI_V $RI_V_End;
[^$Control $CR $LF] $Extend;
[^$Control $CR $LF] $SpacingMark;
# TODO: Restore if the Prepend set becomes non-empty again: $Prepend [^$Control $CR $LF];
## -------------------------------------------------
!!reverse;
$LF $CR;
($L | $V | $LV | $LVT) $L;
($V | $T) ($LV | $V);
$T ($LVT | $T);
$RI_A_End $RI_A;
$RI_B_End $RI_B;
$RI_C_End $RI_C;
$RI_D_End $RI_D;
$RI_E_End $RI_E;
$RI_F_End $RI_F;
$RI_G_End $RI_G;
$RI_H_End $RI_H;
$RI_I_End $RI_I;
$RI_J_End $RI_J;
$RI_K_End $RI_K;
$RI_L_End $RI_L;
$RI_M_End $RI_M;
$RI_N_End $RI_N;
$RI_P_End $RI_P;
$RI_R_End $RI_R;
$RI_S_End $RI_S;
$RI_T_End $RI_T;
$RI_U_End $RI_U;
$RI_V_End $RI_V;
$Extend [^$Control $CR $LF];
$SpacingMark [^$Control $CR $LF];
# TODO: Restore if the Prepend set becomes non-empty again: [^$Control $CR $LF] $Prepend;
## -------------------------------------------------
# We don't logically need safe char break rules, but if we don't provide any at all
# the engine for preceding() and following() will fall back to the
# old style inefficient algorithm.
!!safe_reverse;
$LF $CR;
## -------------------------------------------------
!!safe_forward;
$CR $LF;