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# test various preprocessor features
# test $define and various whitespace uses
$define abc 123
$ define def 456
$define ghi 789
$ define ghi 789 # duplicate definition should be ok if same
$undef ghi
$define ghi 987 # different definition should be ok after $undef
# test (when used later) that substituted text is rescanned
$define yy (xx+xx)
$define xx 1
# test undefinition of something that isn't defined
$undef notdefined
# test ifdef of undefined symbol, and successful skip past bogus directive
$ifdef notdef
$BOGUS
$endif
# test ifdef of defined symbol, and null test body
$ifdef abc
$endif
# test ifndef of defined symbol
$ifndef abc
$error -- abc not defined
$endif#comment on if terminator
# main test program
procedure main()
# write values from definitions; test no substitution in string constant
write("abc,def,ghi,xx,yy: ", abc, " ", def, " ", ghi, " ", xx, " ", yy)
# test $include by including a code fragment from prepro.dat
$include "prepro.dat"
# write values defined in prepro.dat
write("xyzzy: ", xyzzy)
write("abc,def,ghi,xx,yy: ", abc, " ", def, " ", ghi, " ", xx, " ", yy)
# test that predefined symbols agree with &features
# (if defined, first argument is 1, else it's null)
precheck(_AMIGA, "Amiga")
precheck(_ACORN, "Acorn Archimedes")
precheck(_MACINTOSH, "Macintosh")
precheck(_MSDOS_386, "MS-DOS/386")
precheck(_MSDOS, "MS-DOS")
precheck(_OS2, "OS/2")
precheck(_PORT, "PORT")
precheck(_UNIX, "UNIX")
precheck(_VMS, "VMS")
precheck(_COMPILED, "compiled")
precheck(_INTERPRETED, "interpreted")
precheck(_ASCII, "ASCII", 1)
precheck(_EBCDIC, "EBCDIC", 1)
precheck(_CALLING, "calling to Icon")
precheck(_CO_EXPRESSIONS, "co-expressions")
precheck(_DIRECT_EXECUTION, "direct execution")
precheck(_EVENT_MONITOR, "event monitoring")
precheck(_EXECUTABLE_IMAGES, "executable images")
precheck(_EXTERNAL_FUNCTIONS,"external functions")
precheck(_EXTERNAL_VALUES, "external values")
precheck(_KEYBOARD_FUNCTIONS,"keyboard functions")
precheck(_LARGE_INTEGERS, "large integers")
precheck(_MEMORY_MONITOR, "memory monitoring")
precheck(_MULTITASKING, "multiple programs")
precheck(_MULTIREGION, "multiple regions")
precheck(_PIPES, "pipes")
precheck(_RECORD_IO, "record I/O")
precheck(_STRING_INVOKE, "string invocation")
precheck(_SYSTEM_FUNCTION, "system function")
precheck(_VISUALIZATION, "visualization support")
precheck(_WINDOW_FUNCTIONS, "window functions")
precheck(_X_WINDOW_SYSTEM, "X Windows")
precheck(_PRESENTATION_MGR, "Presentation Manager")
precheck(_ARM_FUNCTIONS, "Archimedes extensions")
precheck(_DOS_FUNCTIONS, "MS-DOS extensions")
write("done")
end
# precheck (v, s, p) -- check that s is in &features iff v is non-null;
# always print presence/absence if p is non-null
procedure precheck (v, s, p)
if s == &features then {
if /v then
write ("error: no predefined symbol for ", s)
else if \p then
write ("found feature: ", s)
}
else {
if \v then
write ("error: unexpected predefined symbol for ", s)
else if \p then
write ("no feature: ", s)
}
end
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