Finish first working version of Torque

This is a huge and messy commit, worked on piecemeal while traveling
and while the language was still being designed.

1 files changed, 4 insertions, 7 deletions

diff --git a/src/tokens/packed_binary_literal.rs b/src/tokens/packed_binary_literal.rs
index 1252398..a2720b7 100644
--- a/src/tokens/packed_binary_literal.rs
+++ b/src/tokens/packed_binary_literal.rs
@@ -2,17 +2,13 @@ use crate::*;
 
 
 pub struct PackedBinaryLiteral {
+    pub source: SourceSpan,
     pub value: usize,
+    pub bits: usize,
     pub fields: Vec<BitField>,
     pub errors: Vec<PackedBinaryLiteralParseError>,
 }
 
-impl PackedBinaryLiteral {
-    pub fn from_str(string: &str, parent: &Tokeniser) -> Self {
-        parse_packed_binary_literal(string, parent)
-    }
-}
-
 pub struct BitField {
     pub name: char,
     pub source: SourceSpan,
@@ -40,7 +36,8 @@ impl std::fmt::Display for PackedBinaryLiteral {
         } else {
             let bitcount = (self.value.ilog2() + 1) as usize;
             'bit: for i in (0..bitcount).rev() {
-                if (i+1) % 4 == 0 {
+                let is_first_bit = i+1 == bitcount;
+                if !is_first_bit && (i+1) % 4 == 0 {
                     write!(f, "_")?;
                 }
                 for field in &self.fields {