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If-then-else is working, untested

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This commit is contained in:
Kayne Ruse
2024-11-20 12:50:27 +11:00
parent 34577ecfe1
commit b2b2ca7e53
3 changed files with 58 additions and 5 deletions
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38
scripts/cond.toy
View File

@@ -1,10 +1,44 @@
//literals
if (true) {
print "Success";
}
else {
print "Failed";
}
//false literals
if (false) {
print "Failed";
}
else {
print "Success";
}
//conditionals
if (1 < 2) {
print "Success";
}
if (1 > 2) {
print "Failure";
}
//variables
var a = 42;
if (a) {
print "Success";
}
else {
print "Failure";
}
if (a == 42) {
print "Success";
}
else {
print "Failure";
}

19
scripts/gdb_init Normal file
View File

@@ -0,0 +1,19 @@
set breakpoint pending on
break toy_vm.c:547
command 1
print opcode
continue
end
break toy_vm.c:373
command 2
printf "JUMP %d %d %d\n", type, cond, param
continue
end
break toy_vm.c:375

6
source/toy_routine.c
View File

@@ -332,18 +332,18 @@ static unsigned int writeInstructionIfThenElse(Toy_Routine** rt, Toy_AstIfThenEl
unsigned int elseEndAddr = SKIP_INT(rt, code); //parameter to be written later
//specify the starting position for the else branch
OVERWRITE_INT(rt, code, thenEndAddr, CURRENT_ADDRESS(rt, code) - thenEndAddr);
OVERWRITE_INT(rt, code, thenEndAddr, CURRENT_ADDRESS(rt, code) - (thenEndAddr + 4));
//emit the else branch
writeRoutineCode(rt, ast.elseBranch);
//specify the ending position for the else branch
OVERWRITE_INT(rt, code, elseEndAddr, CURRENT_ADDRESS(rt, code) - elseEndAddr);
OVERWRITE_INT(rt, code, elseEndAddr, CURRENT_ADDRESS(rt, code) - (elseEndAddr + 4));
}
else {
//without an else branch, set the jump destination and move on
OVERWRITE_INT(rt, code, thenEndAddr, CURRENT_ADDRESS(rt, code) - thenEndAddr);
OVERWRITE_INT(rt, code, thenEndAddr, CURRENT_ADDRESS(rt, code) - (thenEndAddr + 4));
}
return 0;