kmx.io/prism.js

diff --git a/components/prism-arduino.js b/components/prism-arduino.js
index 8cba45f..9620f05 100644
--- a/components/prism-arduino.js
+++ b/components/prism-arduino.js
@@ -1,6 +1,6 @@
 Prism.languages.arduino = Prism.languages.extend('cpp', {
-	'constant': /\b(?:ANALOG_MESSAGE|DEFAULT|DIGITAL_MESSAGE|EXTERNAL|FIRMATA_STRING|HIGH|INPUT|INPUT_PULLUP|INTERNAL|INTERNAL1V1|INTERNAL2V56|LED_BUILTIN|LOW|OUTPUT|REPORT_ANALOG|REPORT_DIGITAL|SET_PIN_MODE|SYSEX_START|SYSTEM_RESET)\b/,
 	'keyword': /\b(?:String|array|bool|boolean|break|byte|case|catch|continue|default|do|double|else|finally|for|function|goto|if|in|instanceof|int|integer|long|loop|new|null|return|setup|string|switch|throw|try|void|while|word)\b/,
+	'constant': /\b(?:ANALOG_MESSAGE|DEFAULT|DIGITAL_MESSAGE|EXTERNAL|FIRMATA_STRING|HIGH|INPUT|INPUT_PULLUP|INTERNAL|INTERNAL1V1|INTERNAL2V56|LED_BUILTIN|LOW|OUTPUT|REPORT_ANALOG|REPORT_DIGITAL|SET_PIN_MODE|SYSEX_START|SYSTEM_RESET)\b/,
 	'builtin': /\b(?:Audio|BSSID|Bridge|Client|Console|EEPROM|Esplora|EsploraTFT|Ethernet|EthernetClient|EthernetServer|EthernetUDP|File|FileIO|FileSystem|Firmata|GPRS|GSM|GSMBand|GSMClient|GSMModem|GSMPIN|GSMScanner|GSMServer|GSMVoiceCall|GSM_SMS|HttpClient|IPAddress|IRread|Keyboard|KeyboardController|LiquidCrystal|LiquidCrystal_I2C|Mailbox|Mouse|MouseController|PImage|Process|RSSI|RobotControl|RobotMotor|SD|SPI|SSID|Scheduler|Serial|Server|Servo|SoftwareSerial|Stepper|Stream|TFT|Task|USBHost|WiFi|WiFiClient|WiFiServer|WiFiUDP|Wire|YunClient|YunServer|abs|addParameter|analogRead|analogReadResolution|analogReference|analogWrite|analogWriteResolution|answerCall|attach|attachGPRS|attachInterrupt|attached|autoscroll|available|background|beep|begin|beginPacket|beginSD|beginSMS|beginSpeaker|beginTFT|beginTransmission|beginWrite|bit|bitClear|bitRead|bitSet|bitWrite|blink|blinkVersion|buffer|changePIN|checkPIN|checkPUK|checkReg|circle|cityNameRead|cityNameWrite|clear|clearScreen|click|close|compassRead|config|connect|connected|constrain|cos|countryNameRead|countryNameWrite|createChar|cursor|debugPrint|delay|delayMicroseconds|detach|detachInterrupt|digitalRead|digitalWrite|disconnect|display|displayLogos|drawBMP|drawCompass|encryptionType|end|endPacket|endSMS|endTransmission|endWrite|exists|exitValue|fill|find|findUntil|flush|gatewayIP|get|getAsynchronously|getBand|getButton|getCurrentCarrier|getIMEI|getKey|getModifiers|getOemKey|getPINUsed|getResult|getSignalStrength|getSocket|getVoiceCallStatus|getXChange|getYChange|hangCall|height|highByte|home|image|interrupts|isActionDone|isDirectory|isListening|isPIN|isPressed|isValid|keyPressed|keyReleased|keyboardRead|knobRead|leftToRight|line|lineFollowConfig|listen|listenOnLocalhost|loadImage|localIP|lowByte|macAddress|maintain|map|max|messageAvailable|micros|millis|min|mkdir|motorsStop|motorsWrite|mouseDragged|mouseMoved|mousePressed|mouseReleased|move|noAutoscroll|noBlink|noBuffer|noCursor|noDisplay|noFill|noInterrupts|noListenOnLocalhost|noStroke|noTone|onReceive|onRequest|open|openNextFile|overflow|parseCommand|parseFloat|parseInt|parsePacket|pauseMode|peek|pinMode|playFile|playMelody|point|pointTo|position|pow|prepare|press|print|printFirmwareVersion|printVersion|println|process|processInput|pulseIn|put|random|randomSeed|read|readAccelerometer|readBlue|readButton|readBytes|readBytesUntil|readGreen|readJoystickButton|readJoystickSwitch|readJoystickX|readJoystickY|readLightSensor|readMessage|readMicrophone|readNetworks|readRed|readSlider|readString|readStringUntil|readTemperature|ready|rect|release|releaseAll|remoteIP|remoteNumber|remotePort|remove|requestFrom|retrieveCallingNumber|rewindDirectory|rightToLeft|rmdir|robotNameRead|robotNameWrite|run|runAsynchronously|runShellCommand|runShellCommandAsynchronously|running|scanNetworks|scrollDisplayLeft|scrollDisplayRight|seek|sendAnalog|sendDigitalPortPair|sendDigitalPorts|sendString|sendSysex|serialEvent|setBand|setBitOrder|setClockDivider|setCursor|setDNS|setDataMode|setFirmwareVersion|setMode|setPINUsed|setSpeed|setTextSize|setTimeout|shiftIn|shiftOut|shutdown|sin|size|sqrt|startLoop|step|stop|stroke|subnetMask|switchPIN|tan|tempoWrite|text|tone|transfer|tuneWrite|turn|updateIR|userNameRead|userNameWrite|voiceCall|waitContinue|width|write|writeBlue|writeGreen|writeJSON|writeMessage|writeMicroseconds|writeRGB|writeRed|yield)\b/
 });
 
diff --git a/components/prism-arduino.min.js b/components/prism-arduino.min.js
index f93e989..adb7fe9 100644
--- a/components/prism-arduino.min.js
+++ b/components/prism-arduino.min.js
@@ -1 +1 @@
-Prism.languages.arduino=Prism.languages.extend("cpp",{constant:/\b(?:ANALOG_MESSAGE|DEFAULT|DIGITAL_MESSAGE|EXTERNAL|FIRMATA_STRING|HIGH|INPUT|INPUT_PULLUP|INTERNAL|INTERNAL1V1|INTERNAL2V56|LED_BUILTIN|LOW|OUTPUT|REPORT_ANALOG|REPORT_DIGITAL|SET_PIN_MODE|SYSEX_START|SYSTEM_RESET)\b/,keyword:/\b(?:String|array|bool|boolean|break|byte|case|catch|continue|default|do|double|else|finally|for|function|goto|if|in|instanceof|int|integer|long|loop|new|null|return|setup|string|switch|throw|try|void|while|word)\b/,builtin:/\b(?:Audio|BSSID|Bridge|Client|Console|EEPROM|Esplora|EsploraTFT|Ethernet|EthernetClient|EthernetServer|EthernetUDP|File|FileIO|FileSystem|Firmata|GPRS|GSM|GSMBand|GSMClient|GSMModem|GSMPIN|GSMScanner|GSMServer|GSMVoiceCall|GSM_SMS|HttpClient|IPAddress|IRread|Keyboard|KeyboardController|LiquidCrystal|LiquidCrystal_I2C|Mailbox|Mouse|MouseController|PImage|Process|RSSI|RobotControl|RobotMotor|SD|SPI|SSID|Scheduler|Serial|Server|Servo|SoftwareSerial|Stepper|Stream|TFT|Task|USBHost|WiFi|WiFiClient|WiFiServer|WiFiUDP|Wire|YunClient|YunServer|abs|addParameter|analogRead|analogReadResolution|analogReference|analogWrite|analogWriteResolution|answerCall|attach|attachGPRS|attachInterrupt|attached|autoscroll|available|background|beep|begin|beginPacket|beginSD|beginSMS|beginSpeaker|beginTFT|beginTransmission|beginWrite|bit|bitClear|bitRead|bitSet|bitWrite|blink|blinkVersion|buffer|changePIN|checkPIN|checkPUK|checkReg|circle|cityNameRead|cityNameWrite|clear|clearScreen|click|close|compassRead|config|connect|connected|constrain|cos|countryNameRead|countryNameWrite|createChar|cursor|debugPrint|delay|delayMicroseconds|detach|detachInterrupt|digitalRead|digitalWrite|disconnect|display|displayLogos|drawBMP|drawCompass|encryptionType|end|endPacket|endSMS|endTransmission|endWrite|exists|exitValue|fill|find|findUntil|flush|gatewayIP|get|getAsynchronously|getBand|getButton|getCurrentCarrier|getIMEI|getKey|getModifiers|getOemKey|getPINUsed|getResult|getSignalStrength|getSocket|getVoiceCallStatus|getXChange|getYChange|hangCall|height|highByte|home|image|interrupts|isActionDone|isDirectory|isListening|isPIN|isPressed|isValid|keyPressed|keyReleased|keyboardRead|knobRead|leftToRight|line|lineFollowConfig|listen|listenOnLocalhost|loadImage|localIP|lowByte|macAddress|maintain|map|max|messageAvailable|micros|millis|min|mkdir|motorsStop|motorsWrite|mouseDragged|mouseMoved|mousePressed|mouseReleased|move|noAutoscroll|noBlink|noBuffer|noCursor|noDisplay|noFill|noInterrupts|noListenOnLocalhost|noStroke|noTone|onReceive|onRequest|open|openNextFile|overflow|parseCommand|parseFloat|parseInt|parsePacket|pauseMode|peek|pinMode|playFile|playMelody|point|pointTo|position|pow|prepare|press|print|printFirmwareVersion|printVersion|println|process|processInput|pulseIn|put|random|randomSeed|read|readAccelerometer|readBlue|readButton|readBytes|readBytesUntil|readGreen|readJoystickButton|readJoystickSwitch|readJoystickX|readJoystickY|readLightSensor|readMessage|readMicrophone|readNetworks|readRed|readSlider|readString|readStringUntil|readTemperature|ready|rect|release|releaseAll|remoteIP|remoteNumber|remotePort|remove|requestFrom|retrieveCallingNumber|rewindDirectory|rightToLeft|rmdir|robotNameRead|robotNameWrite|run|runAsynchronously|runShellCommand|runShellCommandAsynchronously|running|scanNetworks|scrollDisplayLeft|scrollDisplayRight|seek|sendAnalog|sendDigitalPortPair|sendDigitalPorts|sendString|sendSysex|serialEvent|setBand|setBitOrder|setClockDivider|setCursor|setDNS|setDataMode|setFirmwareVersion|setMode|setPINUsed|setSpeed|setTextSize|setTimeout|shiftIn|shiftOut|shutdown|sin|size|sqrt|startLoop|step|stop|stroke|subnetMask|switchPIN|tan|tempoWrite|text|tone|transfer|tuneWrite|turn|updateIR|userNameRead|userNameWrite|voiceCall|waitContinue|width|write|writeBlue|writeGreen|writeJSON|writeMessage|writeMicroseconds|writeRGB|writeRed|yield)\b/}),Prism.languages.ino=Prism.languages.arduino;
\ No newline at end of file
+Prism.languages.arduino=Prism.languages.extend("cpp",{keyword:/\b(?:String|array|bool|boolean|break|byte|case|catch|continue|default|do|double|else|finally|for|function|goto|if|in|instanceof|int|integer|long|loop|new|null|return|setup|string|switch|throw|try|void|while|word)\b/,constant:/\b(?:ANALOG_MESSAGE|DEFAULT|DIGITAL_MESSAGE|EXTERNAL|FIRMATA_STRING|HIGH|INPUT|INPUT_PULLUP|INTERNAL|INTERNAL1V1|INTERNAL2V56|LED_BUILTIN|LOW|OUTPUT|REPORT_ANALOG|REPORT_DIGITAL|SET_PIN_MODE|SYSEX_START|SYSTEM_RESET)\b/,builtin:/\b(?:Audio|BSSID|Bridge|Client|Console|EEPROM|Esplora|EsploraTFT|Ethernet|EthernetClient|EthernetServer|EthernetUDP|File|FileIO|FileSystem|Firmata|GPRS|GSM|GSMBand|GSMClient|GSMModem|GSMPIN|GSMScanner|GSMServer|GSMVoiceCall|GSM_SMS|HttpClient|IPAddress|IRread|Keyboard|KeyboardController|LiquidCrystal|LiquidCrystal_I2C|Mailbox|Mouse|MouseController|PImage|Process|RSSI|RobotControl|RobotMotor|SD|SPI|SSID|Scheduler|Serial|Server|Servo|SoftwareSerial|Stepper|Stream|TFT|Task|USBHost|WiFi|WiFiClient|WiFiServer|WiFiUDP|Wire|YunClient|YunServer|abs|addParameter|analogRead|analogReadResolution|analogReference|analogWrite|analogWriteResolution|answerCall|attach|attachGPRS|attachInterrupt|attached|autoscroll|available|background|beep|begin|beginPacket|beginSD|beginSMS|beginSpeaker|beginTFT|beginTransmission|beginWrite|bit|bitClear|bitRead|bitSet|bitWrite|blink|blinkVersion|buffer|changePIN|checkPIN|checkPUK|checkReg|circle|cityNameRead|cityNameWrite|clear|clearScreen|click|close|compassRead|config|connect|connected|constrain|cos|countryNameRead|countryNameWrite|createChar|cursor|debugPrint|delay|delayMicroseconds|detach|detachInterrupt|digitalRead|digitalWrite|disconnect|display|displayLogos|drawBMP|drawCompass|encryptionType|end|endPacket|endSMS|endTransmission|endWrite|exists|exitValue|fill|find|findUntil|flush|gatewayIP|get|getAsynchronously|getBand|getButton|getCurrentCarrier|getIMEI|getKey|getModifiers|getOemKey|getPINUsed|getResult|getSignalStrength|getSocket|getVoiceCallStatus|getXChange|getYChange|hangCall|height|highByte|home|image|interrupts|isActionDone|isDirectory|isListening|isPIN|isPressed|isValid|keyPressed|keyReleased|keyboardRead|knobRead|leftToRight|line|lineFollowConfig|listen|listenOnLocalhost|loadImage|localIP|lowByte|macAddress|maintain|map|max|messageAvailable|micros|millis|min|mkdir|motorsStop|motorsWrite|mouseDragged|mouseMoved|mousePressed|mouseReleased|move|noAutoscroll|noBlink|noBuffer|noCursor|noDisplay|noFill|noInterrupts|noListenOnLocalhost|noStroke|noTone|onReceive|onRequest|open|openNextFile|overflow|parseCommand|parseFloat|parseInt|parsePacket|pauseMode|peek|pinMode|playFile|playMelody|point|pointTo|position|pow|prepare|press|print|printFirmwareVersion|printVersion|println|process|processInput|pulseIn|put|random|randomSeed|read|readAccelerometer|readBlue|readButton|readBytes|readBytesUntil|readGreen|readJoystickButton|readJoystickSwitch|readJoystickX|readJoystickY|readLightSensor|readMessage|readMicrophone|readNetworks|readRed|readSlider|readString|readStringUntil|readTemperature|ready|rect|release|releaseAll|remoteIP|remoteNumber|remotePort|remove|requestFrom|retrieveCallingNumber|rewindDirectory|rightToLeft|rmdir|robotNameRead|robotNameWrite|run|runAsynchronously|runShellCommand|runShellCommandAsynchronously|running|scanNetworks|scrollDisplayLeft|scrollDisplayRight|seek|sendAnalog|sendDigitalPortPair|sendDigitalPorts|sendString|sendSysex|serialEvent|setBand|setBitOrder|setClockDivider|setCursor|setDNS|setDataMode|setFirmwareVersion|setMode|setPINUsed|setSpeed|setTextSize|setTimeout|shiftIn|shiftOut|shutdown|sin|size|sqrt|startLoop|step|stop|stroke|subnetMask|switchPIN|tan|tempoWrite|text|tone|transfer|tuneWrite|turn|updateIR|userNameRead|userNameWrite|voiceCall|waitContinue|width|write|writeBlue|writeGreen|writeJSON|writeMessage|writeMicroseconds|writeRGB|writeRed|yield)\b/}),Prism.languages.ino=Prism.languages.arduino;
\ No newline at end of file
diff --git a/components/prism-c.js b/components/prism-c.js
index b469082..58ed906 100644
--- a/components/prism-c.js
+++ b/components/prism-c.js
@@ -3,6 +3,11 @@ Prism.languages.c = Prism.languages.extend('clike', {
 		pattern: /\/\/(?:[^\r\n\\]|\\(?:\r\n?|\n|(?![\r\n])))*|\/\*[\s\S]*?(?:\*\/|$)/,
 		greedy: true
 	},
+	'string': {
+		// https://en.cppreference.com/w/c/language/string_literal
+		pattern: /"(?:\\(?:\r\n|[\s\S])|[^"\\\r\n])*"/,
+		greedy: true
+	},
 	'class-name': {
 		pattern: /(\b(?:enum|struct)\s+(?:__attribute__\s*\(\([\s\S]*?\)\)\s*)?)\w+|\b[a-z]\w*_t\b/,
 		lookbehind: true
@@ -14,6 +19,14 @@ Prism.languages.c = Prism.languages.extend('clike', {
 });
 
 Prism.languages.insertBefore('c', 'string', {
+	'char': {
+		// https://en.cppreference.com/w/c/language/character_constant
+		pattern: /'(?:\\(?:\r\n|[\s\S])|[^'\\\r\n]){0,32}'/,
+		greedy: true
+	}
+});
+
+Prism.languages.insertBefore('c', 'string', {
 	'macro': {
 		// allow for multiline macro definitions
 		// spaces after the # character compile fine with gcc
@@ -30,6 +43,7 @@ Prism.languages.insertBefore('c', 'string', {
 				},
 				Prism.languages.c['string']
 			],
+			'char': Prism.languages.c['char'],
 			'comment': Prism.languages.c['comment'],
 			'macro-name': [
 				{
@@ -55,7 +69,10 @@ Prism.languages.insertBefore('c', 'string', {
 				inside: Prism.languages.c
 			}
 		}
-	},
+	}
+});
+
+Prism.languages.insertBefore('c', 'function', {
 	// highlight predefined macros as constants
 	'constant': /\b(?:EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|__DATE__|__FILE__|__LINE__|__TIMESTAMP__|__TIME__|__func__|stderr|stdin|stdout)\b/
 });
diff --git a/components/prism-c.min.js b/components/prism-c.min.js
index 3cc5fd9..7d4ddba 100644
--- a/components/prism-c.min.js
+++ b/components/prism-c.min.js
@@ -1 +1 @@
-Prism.languages.c=Prism.languages.extend("clike",{comment:{pattern:/\/\/(?:[^\r\n\\]|\\(?:\r\n?|\n|(?![\r\n])))*|\/\*[\s\S]*?(?:\*\/|$)/,greedy:!0},"class-name":{pattern:/(\b(?:enum|struct)\s+(?:__attribute__\s*\(\([\s\S]*?\)\)\s*)?)\w+|\b[a-z]\w*_t\b/,lookbehind:!0},keyword:/\b(?:_Alignas|_Alignof|_Atomic|_Bool|_Complex|_Generic|_Imaginary|_Noreturn|_Static_assert|_Thread_local|__attribute__|asm|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|inline|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|typeof|union|unsigned|void|volatile|while)\b/,function:/\b[a-z_]\w*(?=\s*\()/i,number:/(?:\b0x(?:[\da-f]+(?:\.[\da-f]*)?|\.[\da-f]+)(?:p[+-]?\d+)?|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?)[ful]{0,4}/i,operator:/>>=?|<<=?|->|([-+&|:])\1|[?:~]|[-+*/%&|^!=<>]=?/}),Prism.languages.insertBefore("c","string",{macro:{pattern:/(^[\t ]*)#\s*[a-z](?:[^\r\n\\/]|\/(?!\*)|\/\*(?:[^*]|\*(?!\/))*\*\/|\\(?:\r\n|[\s\S]))*/im,lookbehind:!0,greedy:!0,alias:"property",inside:{string:[{pattern:/^(#\s*include\s*)<[^>]+>/,lookbehind:!0},Prism.languages.c.string],comment:Prism.languages.c.comment,"macro-name":[{pattern:/(^#\s*define\s+)\w+\b(?!\()/i,lookbehind:!0},{pattern:/(^#\s*define\s+)\w+\b(?=\()/i,lookbehind:!0,alias:"function"}],directive:{pattern:/^(#\s*)[a-z]+/,lookbehind:!0,alias:"keyword"},"directive-hash":/^#/,punctuation:/##|\\(?=[\r\n])/,expression:{pattern:/\S[\s\S]*/,inside:Prism.languages.c}}},constant:/\b(?:EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|__DATE__|__FILE__|__LINE__|__TIMESTAMP__|__TIME__|__func__|stderr|stdin|stdout)\b/}),delete Prism.languages.c.boolean;
\ No newline at end of file
+Prism.languages.c=Prism.languages.extend("clike",{comment:{pattern:/\/\/(?:[^\r\n\\]|\\(?:\r\n?|\n|(?![\r\n])))*|\/\*[\s\S]*?(?:\*\/|$)/,greedy:!0},string:{pattern:/"(?:\\(?:\r\n|[\s\S])|[^"\\\r\n])*"/,greedy:!0},"class-name":{pattern:/(\b(?:enum|struct)\s+(?:__attribute__\s*\(\([\s\S]*?\)\)\s*)?)\w+|\b[a-z]\w*_t\b/,lookbehind:!0},keyword:/\b(?:_Alignas|_Alignof|_Atomic|_Bool|_Complex|_Generic|_Imaginary|_Noreturn|_Static_assert|_Thread_local|__attribute__|asm|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|inline|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|typeof|union|unsigned|void|volatile|while)\b/,function:/\b[a-z_]\w*(?=\s*\()/i,number:/(?:\b0x(?:[\da-f]+(?:\.[\da-f]*)?|\.[\da-f]+)(?:p[+-]?\d+)?|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?)[ful]{0,4}/i,operator:/>>=?|<<=?|->|([-+&|:])\1|[?:~]|[-+*/%&|^!=<>]=?/}),Prism.languages.insertBefore("c","string",{char:{pattern:/'(?:\\(?:\r\n|[\s\S])|[^'\\\r\n]){0,32}'/,greedy:!0}}),Prism.languages.insertBefore("c","string",{macro:{pattern:/(^[\t ]*)#\s*[a-z](?:[^\r\n\\/]|\/(?!\*)|\/\*(?:[^*]|\*(?!\/))*\*\/|\\(?:\r\n|[\s\S]))*/im,lookbehind:!0,greedy:!0,alias:"property",inside:{string:[{pattern:/^(#\s*include\s*)<[^>]+>/,lookbehind:!0},Prism.languages.c.string],char:Prism.languages.c.char,comment:Prism.languages.c.comment,"macro-name":[{pattern:/(^#\s*define\s+)\w+\b(?!\()/i,lookbehind:!0},{pattern:/(^#\s*define\s+)\w+\b(?=\()/i,lookbehind:!0,alias:"function"}],directive:{pattern:/^(#\s*)[a-z]+/,lookbehind:!0,alias:"keyword"},"directive-hash":/^#/,punctuation:/##|\\(?=[\r\n])/,expression:{pattern:/\S[\s\S]*/,inside:Prism.languages.c}}}}),Prism.languages.insertBefore("c","function",{constant:/\b(?:EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|__DATE__|__FILE__|__LINE__|__TIMESTAMP__|__TIME__|__func__|stderr|stdin|stdout)\b/}),delete Prism.languages.c.boolean;
\ No newline at end of file
diff --git a/tests/languages/bison/char_feature.test b/tests/languages/bison/char_feature.test
new file mode 100644
index 0000000..da4b00a
--- /dev/null
+++ b/tests/languages/bison/char_feature.test
@@ -0,0 +1,9 @@
+'+'
+'\''
+
+----------------------------------------------------
+
+[
+	["char", "'+'"],
+	["char", "'\\''"]
+]
diff --git a/tests/languages/bison/string_feature.test b/tests/languages/bison/string_feature.test
index 3f3f6c0..31289cd 100644
--- a/tests/languages/bison/string_feature.test
+++ b/tests/languages/bison/string_feature.test
@@ -1,6 +1,6 @@
 %%
-foo: 'foo' "foo";
-bar: '\'' "\"";
+foo: "foo";
+bar: "\"";
 %%
 
 ----------------------------------------------------
@@ -8,14 +8,21 @@ bar: '\'' "\"";
 [
 	["bison", [
 		["punctuation", "%%"],
-		["property", "foo"], ["punctuation", ":"],
-		["string", "'foo'"], ["string", "\"foo\""], ["punctuation", ";"],
-		["property", "bar"], ["punctuation", ":"],
-		["string", "'\\''"], ["string", "\"\\\"\""], ["punctuation", ";"],
+
+		["property", "foo"],
+		["punctuation", ":"],
+		["string", "\"foo\""],
+		["punctuation", ";"],
+
+		["property", "bar"],
+		["punctuation", ":"],
+		["string", "\"\\\"\""],
+		["punctuation", ";"],
+
 		["punctuation", "%%"]
 	]]
 ]
 
 ----------------------------------------------------
 
-Checks for strings.
\ No newline at end of file
+Checks for strings.
diff --git a/tests/languages/c/char_feature.test b/tests/languages/c/char_feature.test
new file mode 100644
index 0000000..aea7523
--- /dev/null
+++ b/tests/languages/c/char_feature.test
@@ -0,0 +1,35 @@
+'a'
+'\n'
+'\13'
+'🍌'
+'ab'
+
+u'a'
+u'¢'
+u'猫'
+U'猫'
+L'猫'
+
+'\1\2\3\4'
+'\xFF'
+u'\U0001f34c'
+
+----------------------------------------------------
+
+[
+	["char", "'a'"],
+	["char", "'\\n'"],
+	["char", "'\\13'"],
+	["char", "'🍌'"],
+	["char", "'ab'"],
+
+	"\r\n\r\nu", ["char", "'a'"],
+	"\r\nu", ["char", "'¢'"],
+	"\r\nu", ["char", "'猫'"],
+	"\r\nU", ["char", "'猫'"],
+	"\r\nL", ["char", "'猫'"],
+
+	["char", "'\\1\\2\\3\\4'"],
+	["char", "'\\xFF'"],
+	"\r\nu", ["char", "'\\U0001f34c'"]
+]
diff --git a/tests/languages/c/string_feature.test b/tests/languages/c/string_feature.test
new file mode 100644
index 0000000..a1e7ec4
--- /dev/null
+++ b/tests/languages/c/string_feature.test
@@ -0,0 +1,34 @@
+""
+"foo"
+"\x12"
+"3"
+
+"\xff""f"
+
+"foo\
+bar"
+
+"a猫🍌"
+u8"a猫🍌"
+u"a猫🍌"
+U"a猫🍌"
+L"a猫🍌"
+
+----------------------------------------------------
+
+[
+	["string", "\"\""],
+	["string", "\"foo\""],
+	["string", "\"\\x12\""],
+	["string", "\"3\""],
+
+	["string", "\"\\xff\""], ["string", "\"f\""],
+
+	["string", "\"foo\\\r\nbar\""],
+
+	["string", "\"a猫🍌\""],
+	"\r\nu8", ["string", "\"a猫🍌\""],
+	"\r\nu", ["string", "\"a猫🍌\""],
+	"\r\nU", ["string", "\"a猫🍌\""],
+	"\r\nL", ["string", "\"a猫🍌\""]
+]
diff --git a/tests/languages/objectivec/char_feature.test b/tests/languages/objectivec/char_feature.test
new file mode 100644
index 0000000..cf11705
--- /dev/null
+++ b/tests/languages/objectivec/char_feature.test
@@ -0,0 +1,12 @@
+''
+'fo\'o'
+'foo\
+bar'
+
+----------------------------------------------------
+
+[
+	["char", "''"],
+	["char", "'fo\\'o'"],
+	["char", "'foo\\\r\nbar'"]
+]
diff --git a/tests/languages/objectivec/string_feature.test b/tests/languages/objectivec/string_feature.test
index d6c7b30..86953ae 100644
--- a/tests/languages/objectivec/string_feature.test
+++ b/tests/languages/objectivec/string_feature.test
@@ -3,11 +3,6 @@
 "foo\
 bar"
 
-''
-'fo\'o'
-'foo\
-bar'
-
 @""
 @"fo\"o"
 @"foo\
@@ -20,10 +15,6 @@ bar"
 	["string", "\"fo\\\"o\""],
 	["string", "\"foo\\\r\nbar\""],
 
-	["string", "''"],
-	["string", "'fo\\'o'"],
-	["string", "'foo\\\r\nbar'"],
-
 	["string", "@\"\""],
 	["string", "@\"fo\\\"o\""],
 	["string", "@\"foo\\\r\nbar\""]
@@ -31,4 +22,4 @@ bar"
 
 ----------------------------------------------------
 
-Checks for strings.
\ No newline at end of file
+Checks for strings.