1 files changed, 49 insertions, 0 deletions
diff --git a/src/tokens/bytecode.rs b/src/tokens/bytecode.rs
new file mode 100644
index 0000000..9ac340e
--- /dev/null
+++ b/src/tokens/bytecode.rs
@@ -0,0 +1,49 @@
+use crate::*;
+
+
+pub struct Bytecode {
+    pub words: Vec<Word>,
+    pub errors: Vec<BytecodeError>,
+}
+
+#[derive(Clone, Copy)]
+pub struct Word {
+    pub bits: usize,
+    pub value: usize,
+}
+
+impl std::fmt::Display for Word {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
+        for i in (0..self.bits).rev() {
+            let is_first_bit = i+1 == self.bits;
+            if !is_first_bit && (i+1) % 4 == 0 {
+                write!(f, "_")?;
+            }
+            match (self.value >> i) & 1 {
+                0 => write!(f, "0")?,
+                _ => write!(f, "1")?,
+            }
+        }
+        if self.bits == 0 {
+            write!(f, "0")?;
+        }
+        return Ok(());
+    }
+}
+
+pub struct BytecodeError {
+    pub source: SourceSpan,
+    pub variant: BytecodeErrorVariant,
+}
+
+pub enum BytecodeErrorVariant {
+    DefinitionNotFound(String),
+    DuplicateLabelDefinition(String),
+    /// pin, real
+    PinnedAddressBacktrack(usize, usize),
+    /// expected, received
+    ValueTooLarge(usize, usize),
+    StackUnderflow,
+    MultipleReturnValues,
+    NoReturnValue,
+}