Merge pull request #910 from Zokrates/visit-declaration-key

Visit declaration key in folder

changelogs/unreleased/910-schaeff

@@ -0,0 +1 @@
+Fix access to constant in local function call

zokrates_cli/examples/constant_in_sig.zok

@@ -0,0 +1,7 @@
+const u32 N = 1
+def foo(bool[N] arr) -> bool:
+    return true
+
+def main(bool[N] arr):
+    assert(foo(arr))
+    return

zokrates_core/src/typed_absy/folder.rs

@@ -830,7 +830,7 @@ pub fn fold_function_call_expression<
     e: FunctionCallExpression<'ast, T, E>,
 ) -> FunctionCallOrExpression<'ast, T, E> {
     FunctionCallOrExpression::FunctionCall(FunctionCallExpression::new(
-        e.function_key,
+        f.fold_declaration_function_key(e.function_key),
         e.generics
             .into_iter()
             .map(|g| g.map(|g| f.fold_uint_expression(g)))

zokrates_core/src/typed_absy/result_folder.rs

@@ -632,7 +632,7 @@ pub fn fold_function_call_expression<
     e: FunctionCallExpression<'ast, T, E>,
 ) -> Result<FunctionCallOrExpression<'ast, T, E>, F::Error> {
     Ok(FunctionCallOrExpression::Expression(E::function_call(
-        e.function_key,
+        f.fold_declaration_function_key(e.function_key)?,
         e.generics
             .into_iter()
             .map(|g| g.map(|g| f.fold_uint_expression(g)).transpose())