gdb: Deviations
15.4.9.6 Deviations from Standard Modula-2
..........................................
A few changes have been made to make Modula-2 programs easier to debug.
This is done primarily via loosening its type strictness:
* Unlike in standard Modula-2, pointer constants can be formed by
integers. This allows you to modify pointer variables during
debugging. (In standard Modula-2, the actual address contained in
a pointer variable is hidden from you; it can only be modified
through direct assignment to another pointer variable or expression
that returned a pointer.)
* C escape sequences can be used in strings and characters to
represent non-printable characters. GDB prints out strings with
these escape sequences embedded. Single non-printable characters
are printed using the 'CHR(NNN)' format.
* The assignment operator (':=') returns the value of its right-hand
argument.
* All built-in procedures both modify _and_ return their argument.
Info Catalog
gdb: M2 Defaults
gdb: Modula-2
gdb: M2 Checks