import Library.*;
import java.util.*;
COMPILER ParvaDoc $CN
/* Parva level 2 grammar - Coco/R for C# or Java
P.D. Terry, Rhodes University, 2005
Grammar only - LL(1)
As supplied for CSC 301 examination - 2005 */
CHARACTERS
lf = CHR(10) .
backslash = CHR(92) .
control = CHR(0) .. CHR(31) .
letter = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" .
digit = "0123456789" .
stringCh = ANY - '"' - control - backslash .
charCh = ANY - "'" - control - backslash .
printable = ANY - control .
TOKENS
identifier = letter { letter | digit | "_" } .
number = digit { digit } .
stringLit = '"' { stringCh | backslash printable } '"' .
charLit = "'" ( charCh | backslash printable ) "'" .
PRAGMAS /* if required */
COMMENTS FROM "//" TO lf
COMMENTS FROM "/*" TO "*/"
IGNORE control
PRODUCTIONS
ParvaDoc
= { FuncOrVarDeclarations
| ConstDeclarations
} .
FuncOrVarDeclarations
= Type Ident
( Function
| GlobalVars ) .
Function
= "("
FormalParameters
")"
Block .
GlobalVars
= OneGlobal
{ "," Ident
OneGlobal
} ";" .
OneGlobal
= [ "=" Expression
] .
FormalParameters
= [ OneParam
{ "," OneParam
}
] .
OneParam
= Type
Ident .
Block
= "{"
{ Statement
}
"}" .
Statement
= Block
| AssignmentOrCall
| ";"
| ConstDeclarations
| VarDeclarations
| IfStatement
| WhileStatement
| HaltStatement
| ReturnStatement
| ReadStatement
| WriteStatement .
ConstDeclarations
= "const" OneConst
{ ","
OneConst
} ";" .
OneConst
= Ident
"="
Constant .
Constant
= IntConst
| CharConst
| "true"
| "false"
| "null" .
VarDeclarations
= Type
OneVar
{ "," OneVar
} ";" .
OneVar
= Ident
[ "=" Expression
] .
AssignmentOrCall
= Designator
( "=" Expression
| "(" Arguments
")"
) ";" .
Designator
= Ident
[ "[" Expression
"]"
] .
Arguments
= [ OneArg
{ "," OneArg
}
] .
OneArg
= Expression .
IfStatement
= "if" "(" Condition
")" Statement .
WhileStatement
= "while" "(" Condition
")" Statement .
ReturnStatement
= "return"
[ Expression
] ";" .
HaltStatement
= "halt" ";" .
ReadStatement
= "read" "(" ReadElement
{ "," ReadElement
}
")" ";" .
ReadElement
= StringConst
| Designator .
WriteStatement
= "write" "(" WriteElement
{ "," WriteElement
}
")" ";" .
WriteElement
= StringConst
| Expression .
Condition
= Expression .
Expression
= AddExp
[ RelOp
AddExp
] .
AddExp
= [ "+" | "-" ] Term
{ AddOp
Term
} .
Term
= Factor
{ MulOp
Factor
} .
Factor
= Designator
[ "(" Arguments
")"
]
| Constant
| "new" BasicType "[" Expression "]"
| "!" Factor
| "(" Expression ")" .
Type
= "void"
| BasicType
[ "[]"
] .
BasicType
= "int"
| "bool" .
AddOp
= "+" | "-" | "||" .
MulOp
= "*" | "/" | "%" | "&&" .
RelOp
= "==" | "!=" | "<" | "<=" | ">" | ">=" .
Ident
= identifier .
StringConst
= stringLit .
CharConst
= charLit .
IntConst
= number .
END ParvaDoc.
/*-------------------------------------------------------------------------
XXX.java -- the generic Compiler Driver
Compiler Generator Coco/R,
Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
extended by M. Loeberbauer & A. Woess, Univ. of Linz
ported from C# to Java by Wolfgang Ahorner
extended (June 2004) by Pat Terry, Rhodes University (p.terry@ru.ac.za)
(changes marked as "pdt")
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
As an exception, it is allowed to write an extension of Coco/R that is
used as a plugin in non-free software.
If not otherwise stated, any source code generated by Coco/R (other than
Coco/R itself) does not fall under the GNU General Public License.
-------------------------------------------------------------------------*/
-->begin
/* Generic driver frame file for Coco/R for Java
PDT October 2005 - for CSC 301 pracs
Modify this to suit your own purposes - hints are given below! */
// ----------------------- you may need to change the "import" clauses:
import Library.*;
import java.io.*;
public class -->class {
public static void main (String[] args) {
boolean mergeErrors = false;
String inputName = null;
// ------------------------ you may need to process command line parameters:
for (int i = 0; i < args.length; i++) {
if (args[i].toLowerCase().equals("-l")) mergeErrors = true;
else inputName = args[i];
}
if (inputName == null) {
System.err.println("No input file specified");
System.exit(1);
}
int pos = inputName.lastIndexOf('/');
if (pos < 0) pos = inputName.lastIndexOf('\\');
String dir = inputName.substring(0, pos+1);
/*++++ If the parser needs an output file, include a section like the following
and add a line
public static OutFile output;
to your ATG file.
String outputName = null;
pos = inputName.lastIndexOf('.');
if (pos < 0) outputName = inputName + ".out";
else outputName = inputName.substring(0, pos) + ".out";
Parser.output = new OutFile(outputName);
if (Parser.output.openError()) {
System.err.println("cannot open " + outputName);
System.exit(1);
}
++++++ */
Scanner.Init(inputName);
Errors.Init(inputName, dir, mergeErrors);
// ----------------------- add other initialization if required:
Parser.Parse();
Errors.Summarize();
// ----------------------- add other finalization if required:
/*++++ If the parser needs an output file, uncomment this section
Parser.output.close();
++++++ */
}
} // end driver
$$$