I have a project that has been active since 2014 named Nymph.

https://github.com/sciactive/nymph

Naming your project Nymph will probably create confusion.

first of all cool project!
Is a garbage collection scheduled?

Let's get this rolling!

Nymph current parser is getting out of hand.
Let's make a new and better one.

Aside from virtual procedures, are there any features you guys would like?

Are there plans for Nymph to support virtual procedures?

Are you interested in fixing these sort of errors?

Example input:

#inc <stdlib.h>

object Rect {
    int h;
    int w;
}

public void Rect*.print() ;
    printf("%i %i\n", this->h, this->w);
}

public void Rect**.create() {
    (*this) = new Rect;
    (*this)->w = 1;
    (*this)->h = 1;
}

int main(int argc, const char * argv[]) {
    Rect *myRect;

    &myRect.create();

    myRect.print();

    free(myRect);

    return 0;
}

gdb backtrace:

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007f13cb15b3fa in __GI_abort () at abort.c:89
#2  0x00007f13cb197bd0 in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f13cb28cdd0 "*** Error in `%s': %s: 0x%s ***\n")
    at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007f13cb19df96 in malloc_printerr (action=3, str=0x7f13cb28ce28 "munmap_chunk(): invalid pointer", ptr=<optimized out>, ar_ptr=<optimized out>)
    at malloc.c:5049
#4  0x0000564c8a6e88cc in functionCall (token=0x564c8c868998 ") ;\n    printf(\"%i %i\\n\", this->h, this->w);", pos=0x564c8c834f80, outputCFP=0x564c8c8351d0,
    outputHFP=0x564c8c835400, myDict=0x564c8c833010, myDictLen=0x564c8c834f60) at nymph_compiler.c:473
#5  0x0000564c8a6e9275 in parse (token=0x564c8c837686 "public void Rect*.print() ;\n    printf(\"%i %i\\n\", this->h, this->w);", pos=0x564c8c834f80,
    outputCFP=0x564c8c8351d0, outputHFP=0x564c8c835400, myDict=0x564c8c833010, myDictLen=0x564c8c834f60) at nymph_compiler.c:620
#6  0x0000564c8a6e9795 in main (argc=3, argv=0x7ffd27b45448) at nymph_compiler.c:697

.

Around line 1106 of nymph_pp.c there is a chance to read out of bounds. The character before the start of the statement pointer can be read.

I found this error with the provided box.n sample files.

1106-1108

char *postPrepareFunction(char *statement) {
    char *tmp = strstr(statement, "(") - 1;
    for (; isalnum(tmp[0]) != 0; tmp--) {}

I think those same lines of code could be changed to:

	char *tmp = strstr(statement, "(") - 1;
	while (statement - tmp >= 0 && isalnum(tmp[0]) != 0)
		tmp--;

Around line 909 in nymph_pp.c there is a non-terminated string that is being passed into strlen().
Around line 932 in the same file the same non-terminated string is being returned to the calling function.

I believe both of these will lead to crashing conditions. I found this error with the provided box.n sample files.

909-920:

        char *str = malloc(1000*sizeof(char));
        strcat(str, "typedef struct ");
        strcat(str, name);
        strcat(str, " ");
        strcat(str, name);
        strcat(str, ";\n");
        fwrite(str, 1, strlen(str), hFile);
        
        strcpy(str, "struct ");
        strcat(str, name);
        strcat(str, " {\n");
        fwrite(str, 1, strlen(str), hFile);

924-932:

        char *str = malloc(1000*sizeof(char));
        strcat(str, "typedef struct ");
        strcat(str, name);
        strcat(str, " ");
        strcat(str, name);
        strcat(str, ";\n");
        buffer = str_replace(buffer, "obj", "struct");
        strcat(str, buffer);
        return str;

I believe both of these errors can be avoided by using calloc(1, instead of malloc(.

To do a typical self-referentially defined structure in C you typically have to do the following:

struct node; /* This is necessary ... */
struct node {
    char msg[128];
    struct node* next; /* ... so that the compiler knows what this is */
};

So the question is, why not make it so that in Nymph all named structs are scanned for and then just declared in bare format at the top of the preprocessed C file, so that you can omit this seemingly unnecessary redundant empty code from the user.

Can you add me as collaborator so I can edit the project cards too?

Using the make file that you provided, it does not work. After fixing square to rect it worked but now fails because there is no method named create or print.
Output from running make:
gcc -std=c11 nymph_compiler.c -o nymph ./nymph rect.n rect public public ./nymph box.n box public public ./nymph main.n main gcc -std=c11 -c rect.c rect.h gcc -std=c11 -c box.c box.h gcc -std=c11 -c main.c main.h main.c: In function ‘main’: main.c:9:1: warning: implicit declaration of function ‘create’ [-Wimplicit-function-declaration] create(&myBox); ^ main.c:14:1: warning: implicit declaration of function ‘print’ [-Wimplicit-function-declaration] print(myBox); ^ gcc -std=c11 main.o box.o rect.o -o out main.o: In function main':
main.c:(.text+0x2b): undefined reference to create' main.c:(.text+0x3c): undefined reference to create'
main.c:(.text+0x4d): undefined reference to print' main.c:(.text+0x5e): undefined reference to print'
collect2: error: ld returned 1 exit status
makefile:2: recipe for target 'nymph' failed
make: *** [nymph] Error 1
`