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Content of <random> not resolved [message #1753904]

Sun, 12 February 2017 05:21

Samuel Beausoleil

Messages: 2
Registered: February 2017

Junior Member

The following code does not compile. Several errors are found, namely everything that is in std:: for random is not resolved and thus compilation fails. My

#include "Grids.h"
#include <random>

namespace battleship {
Grid * generateGrid(const unsigned int & X_SIZE, const unsigned int & Y_SIZE, Ship ships[], const size_t & nShips) {
    Grid * grid = new Grid(X_SIZE, Y_SIZE);

// !!! NOT FOUND ERROR!!! //
    // Create RNG
    std::random_device rd;     // only used once to initialize (seed) engine
    std::mt19937 rng(rd());    // random-number engine used (Mersenne-Twister in this case)
    std::uniform_int_distribution<int> xCoordRandom(0, X_SIZE);
    std::uniform_int_distribution<int> yCoordRandom(0, Y_SIZE);
    std::uniform_int_distribution<int> randomOrientation(0, 1);
// !!! END OF ERROR!!! //
    // TODO finish
    return grid;
}
}

Here are the error codes:
Symbol 'uniform_int_distribution' could not be resolved [x3]
Type 'std::mt19937' could not be resolved
Type 'std::random_device' could not be resolved

I have set all the compilers toolchains to use C++11 in the build options and use Windows 64bits.

What can I do to resolve these issues?

Thank you very much.

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Re: Content of <random> not resolved [message #1753929 is a reply to message #1753904]

Mon, 13 February 2017 04:14

David Vavra

Messages: 1426
Registered: October 2012

Senior Member

The tool chain parameters are used only for building Makefile recipes to compile and link. They have nothing to do with the Indexer.

You are getting errors generated by the Indexer.
Specifically, the compiler builtin paths.
GCC needs to know the dialect when supplying the builtins. Certain macros have dialect specific settings.

There are two tabs at Project --> Properties --> C/C++ General --> Preprocessor Include Paths, Macros etc.
In the Providers tab, select the proper builtin provider and set the command (globally or locally) to:
${COMMAND} -std=c++11 ${FLAGS} -E -P -v -dD "${INPUTS}"
Then press Apply..
Eclipse should run the cimmand to get the builtin values.
You can verify this by allocating a console with the checkbox beneath the command.
The Entries tab should now have the c+11 builtin values.
Sometimes you need to clear the old values first using the Clear Entries button on the Providers tab.

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