implement dynamic key; implement __curPos; other small changes

fix-vm/src/bytecode_reader.rs

@@ -3,7 +3,7 @@ use fix_common::StringId;
 use num_enum::TryFromPrimitive;
 use string_interner::Symbol as _;
 
-use crate::{AttrKeyData, OperandData, VmRuntimeCtx};
+use crate::{OperandData, VmRuntimeCtx};
 
 pub(crate) struct BytecodeReader<'a> {
     bytecode: &'a [u8],
@@ -132,18 +132,6 @@ impl<'a> BytecodeReader<'a> {
         }
     }
 
-    #[inline(always)]
-    pub(crate) fn read_attr_key_data(&mut self) -> crate::AttrKeyData {
-        use fix_codegen::AttrKeyType;
-        let tag = self.read_u8();
-        let ty = AttrKeyType::try_from_primitive(tag)
-            .unwrap_or_else(|err| panic!("unknown key tag: {:#04x}", err.number));
-        match ty {
-            AttrKeyType::Static => AttrKeyData::Static(self.read_string_id()),
-            AttrKeyType::Dynamic => AttrKeyData::Dynamic,
-        }
-    }
-
     pub(crate) fn pc(&self) -> usize {
         self.pc
     }