imports.MonsoonPrimitivesLexer.g4 Maven / Gradle / Ivy
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/*
* Copyright (c) 2016, 2017, Groupon, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of GROUPON nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
lexer grammar MonsoonPrimitivesLexer;
@header {
import java.util.regex.Matcher;
import java.util.regex.Pattern;
}
@members {
private static final Pattern SPECIAL = Pattern.compile("\\\\([\\\\abtnvfr'\"/]"
+ "|[0-7][0-7][0-7]"
+ "|[0-7][0-7]"
+ "|[0-7]"
+ "|x[0-9a-fA-F][0-9a-fA-F]"
+ "|u[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F]"
+ "|U[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F])");
private static String handleEscapes(String s) {
final StringBuilder result = new StringBuilder(s.length());
Matcher matcher = SPECIAL.matcher(s);
int b = 0;
while (matcher.find()) {
result.append(s, b, matcher.start());
b = matcher.end();
switch (s.charAt(matcher.start() + 1)) {
default:
throw new IllegalStateException("Programmer error: unhandled sequence " + s.substring(matcher.start(), matcher.end()));
case '\\':
result.append('\\');
break;
case 'a':
result.append('\007'); // Unknown to java.
break;
case 'b':
result.append('\010'); // Unknown to java.
break;
case 't':
result.append('\t');
break;
case 'n':
result.append('\n');
break;
case 'v':
result.append('\013'); // Unknown to java.
break;
case 'f':
result.append('\f');
break;
case 'r':
result.append('\r');
break;
case '/':
result.append('/');
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
final String octal_part = s.substring(matcher.start() + 1, matcher.end());
final int ch_int = Integer.parseInt(octal_part, 8);
if (ch_int > 127)
throw new NumberFormatException("Invalid octal escape: " + octal_part);
result.append((char) ch_int);
break;
case 'x':
case 'u':
case 'U':
final String hex_part = s.substring(matcher.start() + 2, matcher.end());
final int unicode_int = Integer.parseInt(hex_part, 16);
if (unicode_int > 0x10ffff)
throw new NumberFormatException("Invalid hex escape: " + hex_part);
result.append(Character.toChars(unicode_int));
break;
}
}
result.append(s, b, s.length());
return result.toString();
}
}
WS : (' '|'\n'|'\t')+
{ skip(); }
;
ID : ('_'|'a'..'z'|'A'..'Z') ('_'|'a'..'z'|'A'..'Z'|'0'..'9')*
;
FP_DECIMAL : ('0'..'9')+ (('e'|'E') '-'? ('0'..'9')+)
| ('0'..'9')* '.' ('0'..'9')+ (('e'|'E') ('0'..'9')+)?
;
FP_HEX : '0x' ('0'..'9'|'a'..'f'|'A'..'F')+ ('.' ('0'..'9'|'a'..'f'|'A'..'F')*)
| '0x' ('0'..'9'|'a'..'f'|'A'..'F')+ ('.' ('0'..'9'|'a'..'f'|'A'..'F')*)? (('p'|'P') '-'? ('0'..'9'|'a'..'f'|'A'..'F')+)
;
DIGITS : ('1'..'9') ('0'..'9')*
;
HEXDIGITS : '0x' ('0'..'9'|'a'..'f'|'A'..'F')+
;
OCTDIGITS : '0' ('0'..'7')*
;
/*
* String logic.
*
* Strings are enclosed in double quotes and may contain escape sequences.
* Strings are sensitive to white space.
*/
QSTRING : '"'
( ~('\\'|'"'|'\u0000'..'\u001f')
| '\\\\'
| '\\a'
| '\\b'
| '\\t'
| '\\n'
| '\\v'
| '\\f'
| '\\r'
| '\\\''
| '\\"'
| '\\/'
| '\\' ('0'..'7') ('0'..'7') ('0'..'7')
| '\\' ('0'..'7') ('0'..'7')
| '\\' ('0'..'7')
| '\\x' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
| '\\u' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
| '\\U' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
)*
'"'
{ setText(handleEscapes(getText().substring(1, getText().length() - 1))); }
;
SQSTRING : '\''
( ~('\\'|'\''|'\u0000'..'\u001f')
| '\\\\'
| '\\a'
| '\\b'
| '\\t'
| '\\n'
| '\\v'
| '\\f'
| '\\r'
| '\\\''
| '\\"'
| '\\/'
| '\\' ('0'..'7') ('0'..'7') ('0'..'7')
| '\\' ('0'..'7') ('0'..'7')
| '\\' ('0'..'7')
| '\\x' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
| '\\u' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
| '\\U' ('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
('0'..'9' | 'a'..'f' | 'A'..'F')
)*
'\''
{ setText(handleEscapes(getText().substring(1, getText().length() - 1))); }
;
REGEX : '//'
( '/' (~('/'|'\\') | '\\' .)
| '\\' .
| ~('/')
)*
'//'
{ setText(getText().substring(2, getText().length() - 2).replace("\\/", "/")); }
;
SQBRACE_OPEN_LIT: '['
;
SQBRACE_CLOSE_LIT
: ']'
;
DASH_LIT : '-'
;
DOT_DOT_LIT : '..'
;
EQ_KW : '='
;
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