[GiNaC-list] Bug report: Can't construct an expression from a string

Mitch Watrous watrous at u.washington.edu
Fri Jan 19 20:34:15 CET 2007


After the latest version of GiNaC was installed on my machine, my 
programs are no longer able to construct an expression from a string.

I am using version 1.3.6-1.fc5 of GiNaC.

My operating system is Fedora Core 5, and I am using version 4.1.1 of 
the gcc compiler.

Here is the code that causes the error, which is based on the example 
code from the GiNaC tutorial section on expression input:

     #include <ginac/ginac.h>

     int main()
       using namespace GiNaC;

       symbol x("x"), y("y");
       ex e("2*x+sin(y)", lst(x, y));

       return 0;

Here is the error message I get when I execute the program main:

     terminate called after throwing an instance of 'std::runtime_error'
       what():  syntax error, unexpected ')' at )

Here is my Makefile:

LDFLAGS  = -L/usr/lib
CPPFLAGS = -g -I/usr/include

CC       = g++

LIBS     = -lcln -lginac

main_OBJ =	main.o

.PHONY: all clean

	$(MAKE) main

	-rm $(main_OBJ)
	-rm main
	-rm -rf ./tmp

main: $(main_OBJ)
	$(CC) $(LDFLAGS) $^ -o $@ $(LIBS)

%.o: %.cpp
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $<

Thanks for your help,
Mitch Watrous

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