Bug 238468

Summary: "syntax error before `>' token" when compiling, using templates
Product: Red Hat Enterprise Linux 3 Reporter: Mike <mrkfact>
Component: gcc3Assignee: Jakub Jelinek <jakub>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 3.7   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2007-04-30 19:43:34 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Mike 2007-04-30 18:47:39 UTC 
Description of problem:


Version-Release number of selected component (if applicable):


How reproducible:


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Additional info:
Comment 1 Mike 2007-04-30 18:49:38 UTC 
Sorry, hit enter too soon.  It seems that inside of a templated function call, a
templated member function will make it think it's a syntax error.  This work
fine in RHEL4, but does not in RHEL3, with the newest gcc-c++ and libraries.

Error:

[root@linuxdevhq01 test]$ g++ test.cpp
test.cpp: In function `void f()':
test.cpp:13: syntax error before `>' token


Code:

#include <iostream>

struct Object {
  template <typename T>
  T* g() {
    return NULL;
  }
};

template <typename T>
void f() {
  Object o;
  T* d = o.g<T>();
}

int main() {
  f<int>();
  return EXIT_SUCCESS;
}
Comment 2 Jakub Jelinek 2007-04-30 19:43:34 UTC 
Please use
T* d = o.template g<T>();
instead in RHEL3.
While this is not mandatory in C++, this is one of the several problems that
can't be fixed easily (and safely) in the old C++ parser.  In G++ 3.4.0 the
C++ parser has been rewritten and this rewrite made it far more ISO C++
compliant.