Rewrite entire assembler

The language is now more general, the code is better structured, error
reporting is more detailed, and many new language features have
been implemented:
- conditional blocks
- first-class strings
- more expression operators
- binary literals
- negative values
- invocations in constant expressions

1 files changed, 18 insertions, 0 deletions

diff --git a/src/formats/debug.rs b/src/formats/debug.rs
new file mode 100644
index 0000000..23fd34f
--- /dev/null
+++ b/src/formats/debug.rs
@@ -0,0 +1,18 @@
+use crate::*;
+
+
+pub fn format_debug(segments: &[Segment]) -> Result<Vec<u8>, FormatError> {
+    let mut output = String::new();
+    for segment in segments {
+        // Find maximum width of all words in the segment.
+        let width = segment.words.iter().map(|w| w.to_string().chars().count()).max().unwrap_or(0);
+        let address = &segment.address;
+        output.push_str(&format!("SEGMENT: 0x{address:>04x}\n"));
+        for word in &segment.words {
+            let string = word.to_string();
+            let w = width as usize;
+            output.push_str(&format!("  {string:>w$}\n"));
+        }
+    }
+    return Ok(output.as_bytes().to_vec());
+}