abcdea a ${tr{abcdea}{a}{}}
abcdea abc z ${tr{abcdea}{abc}{z}}
+# Boolean
+"TrUe" ${if bool{TrUe}{true}{false}} EXPECT: true
+"FALSE" ${if bool{FALSE}{true}{false}} EXPECT: false
+" yes" ${if bool{ yes}{true}{false}} EXPECT: true
+" no" ${if bool{ no}{true}{false}} EXPECT: false
+"yes " ${if bool{yes }{true}{false}} EXPECT: true
+"-1" ${if bool{-1}{true}{false}} EXPECT: error
+"0" ${if bool{0}{true}{false}} EXPECT: false
+"1" ${if bool{1}{true}{false}} EXPECT: true
+" 0 " ${if bool{ 0 }{true}{false}} EXPECT: false
+" 1 " ${if bool{ 1 }{true}{false}} EXPECT: true
+"1111111111111111111" ${if bool{1111111111111111111}{true}{false}} EXPECT: true
+"9" ${if bool{9}{true}{false}} EXPECT: true
+" " ${if bool{ }{true}{false}} EXPECT: false
+"text" ${if bool{text}{true}{false}} EXPECT: error
+" text" ${if bool{ text}{true}{false}} EXPECT: error
+"text " ${if bool{text }{true}{false}} EXPECT: error
+" text " ${if bool{ text }{true}{false}} EXPECT: error
+"00" ${if bool{00}{true}{false}} EXPECT: false
+
+"TrUe" ${if bool_lax{TrUe}{true}{false}} EXPECT: true
+"FALSE" ${if bool_lax{FALSE}{true}{false}} EXPECT: false
+" yes" ${if bool_lax{ yes}{true}{false}} EXPECT: true
+" no" ${if bool_lax{ no}{true}{false}} EXPECT: false
+"yes " ${if bool_lax{yes }{true}{false}} EXPECT: true
+"-1" ${if bool_lax{-1}{true}{false}} EXPECT: true
+"0" ${if bool_lax{0}{true}{false}} EXPECT: false
+"1" ${if bool_lax{1}{true}{false}} EXPECT: true
+" 0 " ${if bool_lax{ 0 }{true}{false}} EXPECT: false
+" 1 " ${if bool_lax{ 1 }{true}{false}} EXPECT: true
+"1111111111111111111" ${if bool_lax{1111111111111111111}{true}{false}} EXPECT: true
+"9" ${if bool_lax{9}{true}{false}} EXPECT: true
+" " ${if bool_lax{ }{true}{false}} EXPECT: false
+"text" ${if bool_lax{text}{true}{false}} EXPECT: true
+" text" ${if bool_lax{ text}{true}{false}} EXPECT: true
+"text " ${if bool_lax{text }{true}{false}} EXPECT: true
+" text " ${if bool_lax{ text }{true}{false}} EXPECT: true
+"00" ${if bool_lax{00}{true}{false}} EXPECT: true
+
# RFC 2047
abcd ${rfc2047:abcd}