core: Refactor VarMap to IndexMap

This is the only Map I can find that preserves insertion order while
also deduplicating elements by key.

nac3core/src/codegen/expr.rs

@@ -2,14 +2,7 @@ use std::{collections::HashMap, convert::TryInto, iter::once, iter::zip};
 
 use crate::{
     codegen::{
-        classes::{
-            ArrayLikeIndexer,
-            ArrayLikeValue,
-            ListValue,
-            NDArrayValue,
-            RangeValue,
-            UntypedArrayLikeAccessor,
-        },
+        classes::{ArrayLikeIndexer, ListValue, NDArrayValue, RangeValue, UntypedArrayLikeAccessor},
         concrete_type::{ConcreteFuncArg, ConcreteTypeEnum, ConcreteTypeStore},
         gen_in_range_check,
         get_llvm_type,
@@ -42,6 +35,7 @@ use itertools::{chain, izip, Itertools, Either};
 use nac3parser::ast::{
     self, Boolop, Comprehension, Constant, Expr, ExprKind, Location, Operator, StrRef,
 };
+use crate::codegen::classes::ArrayLikeValue;
 
 use super::{CodeGenerator, llvm_intrinsics::call_memcpy_generic, need_sret};
 

nac3core/src/codegen/irrt/mod.rs

@@ -1,7 +1,7 @@
 use crate::typecheck::typedef::Type;
 
 use super::{
-    classes::{ArrayLikeIndexer, ArrayLikeValue, ListValue, NDArrayValue, UntypedArrayLikeMutator},
+    classes::{ArrayLikeIndexer, ListValue, NDArrayValue, UntypedArrayLikeMutator},
     CodeGenContext,
     CodeGenerator,
 };
@@ -16,6 +16,7 @@ use inkwell::{
 };
 use itertools::Either;
 use nac3parser::ast::Expr;
+use crate::codegen::classes::ArrayLikeValue;
 
 #[must_use]
 pub fn load_irrt(ctx: &Context) -> Module {
@@ -578,9 +579,9 @@ pub fn call_ndarray_calc_size<'ctx, G, Dims>(
     generator: &G,
     ctx: &CodeGenContext<'ctx, '_>,
     dims: &Dims,
-) -> IntValue<'ctx>
+) -> IntValue<'ctx> 
     where
-        G: CodeGenerator + ?Sized,
+        G: CodeGenerator + ?Sized, 
         Dims: ArrayLikeIndexer<'ctx>, {
     let llvm_i64 = ctx.ctx.i64_type();
     let llvm_usize = generator.get_size_type(ctx.ctx);
@@ -687,7 +688,8 @@ fn call_ndarray_flatten_index_impl<'ctx, G, Indices>(
 ) -> IntValue<'ctx>
     where
         G: CodeGenerator + ?Sized,
-        Indices: ArrayLikeIndexer<'ctx>, {
+        Indices: ArrayLikeIndexer<'ctx>,
+{
     let llvm_i32 = ctx.ctx.i32_type();
     let llvm_usize = generator.get_size_type(ctx.ctx);
 

nac3core/src/codegen/numpy.rs

@@ -8,11 +8,9 @@ use crate::{
     codegen::{
         classes::{
             ArrayLikeIndexer,
-            ArrayLikeValue,
             ListValue,
             NDArrayValue,
             TypedArrayLikeAccessor,
-            UntypedArrayLikeAccessor,
         },
         CodeGenContext,
         CodeGenerator,
@@ -30,6 +28,7 @@ use crate::{
     },
     typecheck::typedef::{FunSignature, Type},
 };
+use crate::codegen::classes::{ArrayLikeValue, UntypedArrayLikeAccessor};
 
 /// Creates an `NDArray` instance from a dynamic shape.
 ///