/usr/share/doc/javacc/examples/JJTreeExamples/eg3.jjt is in javacc-doc 5.0-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | /* Copyright (c) 2006, Sun Microsystems, 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 the Sun Microsystems, Inc. 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 OWNER 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.
*/
options {
MULTI=true;
NODE_DEFAULT_VOID=true;
}
PARSER_BEGIN(Eg3)
/** An Arithmetic Grammar. */
public class Eg3 {
/** Main entry point. */
public static void main(String args[]) {
System.out.println("Reading from standard input...");
Eg3 t = new Eg3(System.in);
try {
ASTStart n = t.Start();
n.dump("");
System.out.println("Thank you.");
} catch (Exception e) {
System.out.println("Oops.");
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
PARSER_END(Eg3)
SKIP :
{
" "
| "\t"
| "\n"
| "\r"
| <"//" (~["\n","\r"])* ("\n"|"\r"|"\r\n")>
| <"/*" (~["*"])* "*" (~["/"] (~["*"])* "*")* "/">
}
TOKEN : /* LITERALS */
{
< INTEGER_LITERAL:
<DECIMAL_LITERAL> (["l","L"])?
| <HEX_LITERAL> (["l","L"])?
| <OCTAL_LITERAL> (["l","L"])?
>
|
< #DECIMAL_LITERAL: ["1"-"9"] (["0"-"9"])* >
|
< #HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"])+ >
|
< #OCTAL_LITERAL: "0" (["0"-"7"])* >
}
TOKEN : /* IDENTIFIERS */
{
< IDENTIFIER: <LETTER> (<LETTER>|<DIGIT>)* >
|
< #LETTER: ["_","a"-"z","A"-"Z"] >
|
< #DIGIT: ["0"-"9"] >
}
/** Main production. */
ASTStart Start() #Start : {}
{
Expression() ";"
{ return jjtThis; }
}
/** An Expression. */
void Expression() : {}
{
AdditiveExpression()
}
/** An Additive Expression. */
void AdditiveExpression() : {}
{
(
MultiplicativeExpression() ( ( "+" | "-" ) MultiplicativeExpression() )*
) #Add(>1)
}
/** A Multiplicative Expression. */
void MultiplicativeExpression() : {}
{
(
UnaryExpression() ( ( "*" | "/" | "%" ) UnaryExpression() )*
) #Mult(>1)
}
/** A Unary Expression. */
void UnaryExpression() : {}
{
"(" Expression() ")" | Identifier() | Integer()
}
/** An Identifier. */
void Identifier() #MyID :
{
Token t;
}
{
t=<IDENTIFIER>
{
jjtThis.setName(t.image);
}
}
/** An Integer. */
void Integer() #Integer : {}
{
<INTEGER_LITERAL>
}
|