19 pub struct SourceLoc(u32);  struct
21 impl SourceLoc {  implementation
38 impl Default for SourceLoc {  implementation
44 impl fmt::Display for SourceLoc {  implementation
66     pub fn from_base_offset(base: SourceLoc, offset: SourceLoc) -> Self {  in from_base_offset()  argument
75     pub fn expand(&self, base: SourceLoc) -> SourceLoc {  in expand()  argument
79             SourceLoc::new(self.0.wrapping_add(base.bits()))  in expand()
107     use crate::ir::SourceLoc;
112         assert_eq!(SourceLoc::default().to_string(), "@-");  in display()
113         assert_eq!(SourceLoc::new(0).to_string(), "@0000");  in display()
114         assert_eq!(SourceLoc::new(16).to_string(), "@0010");  in display()
115         assert_eq!(SourceLoc::new(0xabcdef).to_string(), "@abcdef");  in display()