CUP is a parser generator for Java.
CUP generates Look-Ahead Left Recursive parser in Java.
It is related to two other projects:
- jflex is a scanner generator which can rely on CUP
- Classgen is a tool to generate class frameworks and visitor patterns
Questions tagged [cup]
76 questions
0
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0 answers
java_cup.runtime.Symbol "EOF" has not been declared
I have alreay read this discussion, but it didn't help me.
start with file;
file ::= primario SEP secondario SEP terziario EOF {:fm.scriviDebug();:};
Where fm.scriviDebug() is a my custom class that prints on stdout what CUP parsed.
I have no idea…
shogitai
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0
votes
2 answers
Can't run jflex.bat in windows 8.1
I just made the installation of jflex and cup and I want to test if everything is ok.
Here is what I write in the shell and the result I get.
Here is the content of jflex.bat file:
Is there something I have done wrong?
How to run for first time…
John Dow
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0
votes
1 answer
I am getting a Shift/Reduce conflict with CUP
I have the following parse code, but I am getting a shift/reduce conflict between the non terminals expression and function_call. This is a small parse code for the Visual Basic programming language. Could the CFG be wrong? Or Is the problem in only…
Jose E. Hernandez
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- 5
0
votes
1 answer
Parsing shift-reduce conflict
I am using JavaCUP tool in order to produce a parser for my language. I am trying to write a grammar that matches nested and multiple if_else statements.
Input file
// matches
if ()
if ()
else
if ()
else
else
// no match ->…
pirox22
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0
votes
1 answer
How to get rid of reduce/reduce, reduce/shift errors?
I keep on running into reduce/reduce and reduce/shift problems with my grammar, but I'm not sure why or how to fix it.
Here is what I have
block ::=
block_statement
| block_statement block
;
block_statement ::=
type…
Paul
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0
votes
0 answers
haskell grammar for cup file
i am working on a haskell compiler written in java using JLex and cup .i finished my lexer file and now i am working on my parser.cup file where i should define my terminals , non-terminals and the grammar. i have already finished the terminal and…
Halawa
- 1,171
- 2
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0
votes
1 answer
Linking CUP and jflex
I am trying to link my parser.java and yylex.java using help from http://www2.cs.tum.edu/projects/cup/examples.php
http://www.cs.princeton.edu/~appel/modern/java/CUP/manual.html
http://jflex.de/manual.html
But I am getting these errors.
error:…
uutsav
- 389
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- 16
0
votes
1 answer
Java Cup install Windows
So I've been having some trouble regarding installing Cup in a windows 7 environment. I've been following this guide mainly. The problem I come across is when I try to run cup on a file(.cup) I get the familiar "'cup' is not recognized as an…
Andro
- 13
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0
votes
3 answers
Java CUP and JFlex Interaction
I am considering to use the CUP parser generator for a project. In order to correctly parse some constructs of the language I am going to be compiling, I will need the lexer (generated by JFlex) to use information from the symbol table (not parse…
user2625942
- 73
- 8
0
votes
0 answers
how to compile the java file generated by cup
I downloaded the demo from http://www2.cs.tum.edu/projects/cup/
I got parser.java by command:
java -jar bin/java-cup-11a.jar cup/parser.cup
but when I compile parser.java by:
javac -classpath lib/java-cup-11a-runtime.jar parser.java
the result…
cspro
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- 1
0
votes
2 answers
Arithmetic expression grammar in prefix notation (Java Cup)
I'm writting a grammar for arithmetic expression in prefix notation. However I have an issue when parsing negative numbers or substraction. Grammar example is this:
precedence right +, -;
precedence right *, /;
precedence right uminus;
E ::= + E E
…
Julián Chamalé
- 607
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0
votes
1 answer
shift/reduce conflict in cup parser (grammar with arrarys and matrices)
I am writing a cup parser for a small language that is supposed to support classes with arrays and matrices as its fields. For example, if there is a class instance:
C c;
the fields are to be accessed with:
c.x;
c.y[];
c.z[][];
I am having trouble…
0
votes
0 answers
Cannot find symbol error in the generated class file
I am designing a compiler for a small programming language. We are given a java pre processor (GEN package) which generates the ASTs needed for the compilers. We have to just give the input grammar in a specific format to the GEN file. The GEN file…
Ramesh
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votes
1 answer
How to define at least one occurrence of a string between two tokens in a CUP parser grammar
I am trying to define a non terminal symbol in a LALR(1) grammar (with CUP parser). It is requested that
the
token must appear exactly two times,
while token must appear at least one time.
In the end I came up with this… 
gc5
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-1
votes
1 answer
JSON Validation Grammar in Cup and Jflex
I wrote the following cup file for arrays:
terminal COMMA, LSQBRACKET, RSQBRACKET;
terminal Integer NUMBER;
non terminal array, value_list, value;
non terminal Integer expr;
array ::= LSQBRACKET value_list RSQBRACKET;
…
Raushan
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