ianatha / bababasic Goto Github PK

My code:

PRINT "What is your name, adventurer?"
INPUT "> "; name$
PRINT "Greetings, "; name$; "!"
IF name$ = "Byron" THEN
	PRINT "Welcome, Byron, the greatest hero of all time!"
ELSE
	PRINT "Greetings, "; name$; ". Not the hero I was expecting, but I guess you'll do."
END IF

I get an error about no viable alternative, as shown in the screenshot provided.

The following script, due to addition of an empty line at the end, fails.

10 A = 1
20 PRINT A

The error is:

REM --- OUTPUT START
REM !!! SYNTAX ERROR: Cannot mix linenumber and no-linenumber mode!
REM --- OUTPUT END

This should also ensure that the output buffer is flushed/displayed before all the threads are terminated, without the sleep(250) workaround.

Tracking issue for:

• https://github.com/ianatha/bababasic/security/code-scanning/1
• https://github.com/ianatha/bababasic/security/code-scanning/2

Script:

OPEN "DATA.DAT" FOR OUTPUT AS #1

Error:

Fixing this would require somehow "mounting" an Android FS location onto the app, or something of the sort.

There are some decisions to be made as to if paths like "C:\IANDIR\FILE.TXT" should work, or if we should expect POSIX/Android paths.

Original request: https://news.ycombinator.com/item?id=38202703#38206991

The app always displays sample.txt whenever it starts/restarts.
It should remember the buffer of an unsaved file.

See https://stackoverflow.com/questions/40959903/exclude-testing-device-from-firebase-analytics-logging

Ideally, would also exclude Play Store's testing devices.

Currently, we output the stdout and stderr of the running script into the script editor's buffer, and we prepend "REM", to make it comments.

This was a cute hack to get this rolling quickly, but something nicer needs to happen.

The following code:

10 PRINT 1
20 GOTO 10

causes the UI to freeze completely.

The following code fails silently:

10 REM 29-10-2023
20 DIM A(2)
30 A(0)=6:A(1)=A(0)+11
35 A(2)=A(1)+10
40 FOR I%=1 TO 2
50 PRINT "A(",I%,")=",A(I%)
60 NEXT I%

The output was:

REM --- OUTPUT START
REM --- OUTPUT END

VAL("invalid number") causes runtime error, but it should return 0.

We should implement the QBasic "NAME" statement, which changes the name of a disk file or directory.

Its syntax is "NAME oldfilename AS newfilename".

The NAME statement is similar to the DOS RENAME command. NAME can move a file from one directory to another but cannot move a directory.

The arguments oldfilename and newfilename are string expressions each of which contains a file or directory name and an optional path. If the path in newfilename is different from the path in oldfilename, the NAME statement changes the pathname as well as renames the file as indicated.

Examples

NAME "ACCTS" AS "LEDGER"

In principle, resolving this is very similar to implementing the KILL statement in #96. Specifically, the skeleton for declaring a new QBasic statement is the same, but instead of deleting the file (like KILL does), we must rename it.

The relevant files to change are:

• libbababasic/src/main/antlr/io/atha/libbababasic/grammar/BabaBASIC.g4
• libbababasic/src/main/java/io/atha/libbababasic/file/BBFiles.kt
• libbababasic/src/main/java/io/atha/libbababasic/parser/IR.kt
• libbababasic/src/main/java/io/atha/libbababasic/parser/IRListener.kt
• libbababasic/src/main/java/io/atha/libbababasic/runtime/BBRuntime.kt
• libbababasic/src/main/java/io/atha/libbababasic/runtime/Functions.kt

After RunActivity finished running, the messages says "press Enter", but there is no keyboard available.

SLEEP's argument should be in seconds, not milliseconds.
Furthermore, SLEEP should be interruptible by pressing any key.
(Check the behavior of SLEEP 0)