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add position annotation to errors

This commit is contained in:
b1ek 2023-08-22 22:14:41 +10:00
parent df24b5da84
commit dc29847cd3
Signed by: blek
GPG Key ID: 14546221E3595D0C
1 changed files with 4 additions and 4 deletions
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8
src/lib.rs
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@ -21,14 +21,14 @@ pub fn eval_mem(bf_str: &&str, mem: &mut [u8], pointer: &mut usize) -> Result<()
if char == '>' { if char == '>' {
if (*pointer) + 1 == 30000 { if (*pointer) + 1 == 30000 {
return Err("Attempt to increase pointer exceeding memory size".into()); return Err(format!("Attempt to increase pointer exceeding memory size ({})", pos));
} }
*pointer += 1; *pointer += 1;
continue continue
} }
if char == '<' { if char == '<' {
if *pointer == 0 { if *pointer == 0 {
return Err("Attempt to reduce pointer to less than 1".into()); return Err(format!("Attempt to reduce pointer to less than 1 ({})", pos));
} }
*pointer -= 1; *pointer -= 1;
continue continue
@ -73,7 +73,7 @@ pub fn eval_mem(bf_str: &&str, mem: &mut [u8], pointer: &mut usize) -> Result<()
if char == ']' { if char == ']' {
if loop_stack.len() == 0 { if loop_stack.len() == 0 {
return Err(format!("Invalid loop at position {pos}")); return Err(format!("Unmatched ']' ({})", pos));
} }
if mem[*pointer] == 0 { if mem[*pointer] == 0 {
@ -87,7 +87,7 @@ pub fn eval_mem(bf_str: &&str, mem: &mut [u8], pointer: &mut usize) -> Result<()
} }
if loop_stack.len() != 0 { if loop_stack.len() != 0 {
return Err(format!("Unclosed loop at position {}", loop_stack.last().unwrap())); return Err(format!("Unmatched '[' ({})", loop_stack.last().unwrap()));
} }
Ok(()) Ok(())