Remove SymbolTable functionality associated with flattening

compiler/passes/src/symbol_table/function_symbol.rs

@@ -22,7 +22,7 @@ use crate::SymbolTable;
 #[derive(Clone, Debug)]
 pub struct FunctionSymbol {
     pub(crate) id: usize,
-    pub(crate) type_: Type,
+    pub(crate) output: Type,
     pub(crate) span: Span,
     pub(crate) input: Vec<FunctionInput>,
 }
@@ -31,7 +31,7 @@ impl SymbolTable {
     pub(crate) fn new_function_symbol(id: usize, func: &Function) -> FunctionSymbol {
         FunctionSymbol {
             id,
-            type_: func.output,
+            output: func.output,
             span: func.span,
             input: func.input.clone(),
         }

compiler/passes/src/symbol_table/table.rs

@@ -22,7 +22,7 @@ use leo_span::{Span, Symbol};
 
 use indexmap::IndexMap;
 
-use crate::{Declaration, FunctionSymbol, Value, VariableSymbol};
+use crate::{FunctionSymbol, VariableSymbol};
 
 #[derive(Clone, Debug, Default)]
 pub struct SymbolTable {
@@ -40,8 +40,6 @@ pub struct SymbolTable {
     pub(crate) variables: IndexMap<Symbol, VariableSymbol>,
     /// The index of the current scope
     pub(crate) scope_index: usize,
-    /// If the block will always be executed when the parent block is executed
-    pub(crate) is_locally_non_const: bool,
     /// The subscopes of this scope
     pub(crate) scopes: Vec<RefCell<SymbolTable>>,
 }
@@ -90,11 +88,8 @@ impl SymbolTable {
         Ok(())
     }
 
-    pub fn insert_block(&mut self, is_locally_non_const: bool) -> usize {
-        self.scopes.push(RefCell::new(SymbolTable {
-            is_locally_non_const,
-            ..Default::default()
-        }));
+    pub fn insert_block(&mut self) -> usize {
+        self.scopes.push(RefCell::new(Default::default()));
         self.scope_index()
     }
 
@@ -156,62 +151,6 @@ impl SymbolTable {
         }
     }
 
-    /// Finds the variable in the parent scope, then SHADOWS it in most recent non-const scope with a mut const value.
-    /// returns a boolean for if the variable should be slated for deconstification
-    pub fn locally_constify_variable(&mut self, symbol: Symbol, value: Value) -> bool {
-        let mut var = self
-            .lookup_variable(&symbol)
-            .unwrap_or_else(|| panic!("attempting to constify non-existent variable `{symbol}`"))
-            .clone();
-        var.declaration = Declaration::Mut(Some(value));
-
-        let mut st = self;
-        loop {
-            let is_in_parent = st.variable_in_parent_scope(&symbol);
-            let is_in_local = st.variable_in_local_scope(&symbol);
-            if is_in_local && is_in_parent {
-                st.variables.insert(symbol, var.clone());
-            } else if st.is_locally_non_const && !is_in_parent {
-                st.variables.insert(symbol, var);
-                break false;
-            } else if st.is_locally_non_const && is_in_parent {
-                st.variables.insert(symbol, var);
-                break true;
-            }
-
-            if !st.is_locally_non_const && st.parent.is_some() && is_in_parent {
-                st = st.parent.as_mut().unwrap()
-            } else {
-                break true;
-            }
-        }
-    }
-
-    pub fn set_variable(&mut self, symbol: &Symbol, value: Value) -> bool {
-        if let Some(var) = self.variables.get_mut(symbol) {
-            var.declaration = match &var.declaration {
-                Declaration::Const(_) => Declaration::Const(Some(value)),
-                Declaration::Mut(_) => Declaration::Mut(Some(value)),
-                other => other.clone(),
-            };
-            true
-        } else if let Some(parent) = &mut self.parent {
-            parent.set_variable(symbol, value)
-        } else {
-            false
-        }
-    }
-
-    /// Finds all previous occurrences of the variable and replaces it with a non-const mutable value
-    pub fn deconstify_variable(&mut self, symbol: &Symbol) {
-        if let Some(var) = self.variables.get_mut(symbol) {
-            var.declaration = Declaration::Mut(None);
-        }
-        if let Some(parent) = &mut self.parent {
-            parent.deconstify_variable(symbol)
-        }
-    }
-
     pub fn get_fn_scope(&self, symbol: &Symbol) -> Option<&RefCell<Self>> {
         if let Some(func) = self.functions.get(symbol) {
             self.scopes.get(func.id)

compiler/passes/src/symbol_table/variable_symbol.rs

@@ -14,61 +14,40 @@
 // You should have received a copy of the GNU General Public License
 // along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
 
-use leo_ast::{Identifier, ParamMode, Type};
-use leo_errors::Result;
-use leo_span::Span;
+use std::fmt::Display;
 
-use crate::Value;
+use leo_ast::{ParamMode, Type};
+use leo_span::Span;
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum Declaration {
-    Const(Option<Value>),
-    Input(Type, ParamMode),
-    Mut(Option<Value>),
+    Const,
+    Input(ParamMode),
+    Mut,
 }
 
-impl Declaration {
-    pub fn get_as_u128(&self) -> Result<Option<u128>> {
+impl Display for Declaration {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         use Declaration::*;
 
         match self {
-            Const(Some(value)) => Ok(Some(value.try_into()?)),
-            Input(_, _) => Ok(None),
-            _ => Ok(None),
-        }
-    }
-
-    pub fn get_type(&self) -> Option<Type> {
-        use Declaration::*;
-
-        match self {
-            Const(Some(value)) => Some(value.into()),
-            Input(type_, _) => Some(*type_),
-            _ => None,
+            Const => write!(f, "const var"),
+            Input(m) => write!(f, "{m} input"),
+            Mut => write!(f, "mut var"),
         }
     }
 }
 
-impl AsRef<Self> for Declaration {
-    fn as_ref(&self) -> &Self {
-        self
-    }
-}
-
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Eq, PartialEq)]
 pub struct VariableSymbol {
     pub type_: Type,
     pub span: Span,
     pub declaration: Declaration,
 }
 
-impl VariableSymbol {
-    pub fn get_const_value(&self, ident: Identifier) -> Option<Value> {
-        use Declaration::*;
-        match &self.declaration {
-            Const(Some(v)) | Mut(Some(v)) => Some(v.clone()),
-            Input(type_, ParamMode::Const) => Some(Value::Input(*type_, ident)),
-            _ => None,
-        }
+impl Display for VariableSymbol {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}: {}", self.declaration, self.type_)?;
+        Ok(())
     }
 }