Clippy and warning clean-ups.

src/backend/into_crane.rs

@@ -4,12 +4,12 @@ use crate::backend::runtime::RuntimeFunctions;
 use crate::ir::{Expression, Primitive, Program, Statement, Value, ValueOrRef};
 use cranelift_codegen::entity::EntityRef;
 use cranelift_codegen::ir::{
-    entities, types, Function, GlobalValue, InstBuilder, Signature, UserFuncName, MemFlags,
+    entities, types, Function, GlobalValue, InstBuilder, MemFlags, Signature, UserFuncName,
 };
 use cranelift_codegen::isa::CallConv;
 use cranelift_codegen::Context;
 use cranelift_frontend::{FunctionBuilder, FunctionBuilderContext, Variable};
-use cranelift_module::{DataContext, FuncId, Linkage, Module, ModuleError, DataId};
+use cranelift_module::{DataContext, DataId, FuncId, Linkage, Module, ModuleError};
 use internment::ArcIntern;
 
 use super::RuntimeFunctionError;
@@ -45,10 +45,13 @@ impl Program {
         let mut variable_table = HashMap::new();
         let mut next_var_num = 1;
         let print_func_ref = rtfuns.include_runtime_function("print", module, &mut ctx.func)?;
-        let pre_defined_symbols: HashMap<String, GlobalValue> = pre_defined_symbols.iter().map(|(k, v)| {
+        let pre_defined_symbols: HashMap<String, GlobalValue> = pre_defined_symbols
+            .iter()
+            .map(|(k, v)| {
                 let local_data = module.declare_data_in_func(*v, &mut ctx.func);
                 (k.clone(), local_data)
-        }).collect();
+            })
+            .collect();
 
         let mut fctx = FunctionBuilderContext::new();
         let mut builder = FunctionBuilder::new(&mut ctx.func, &mut fctx);
@@ -60,7 +63,11 @@ impl Program {
                 Statement::Print(ann, var) => {
                     let local_name_ref = string_table.get(&var).unwrap();
                     let name_ptr = builder.ins().symbol_value(types::I64, *local_name_ref);
-                    let val = ValueOrRef::Ref(ann, var).into_cranelift(&mut builder, &variable_table, &pre_defined_symbols)?;
+                    let val = ValueOrRef::Ref(ann, var).into_cranelift(
+                        &mut builder,
+                        &variable_table,
+                        &pre_defined_symbols,
+                    )?;
                     builder.ins().call(print_func_ref, &[name_ptr, val]);
                 }
 
@@ -76,14 +83,16 @@ impl Program {
                         }
 
                         Expression::Primitive(_, prim, mut vals) => {
-                            let right = vals
-                                .pop()
-                                .unwrap()
-                                .into_cranelift(&mut builder, &variable_table, &pre_defined_symbols)?;
-                            let left = vals
-                                .pop()
-                                .unwrap()
-                                .into_cranelift(&mut builder, &variable_table, &pre_defined_symbols)?;
+                            let right = vals.pop().unwrap().into_cranelift(
+                                &mut builder,
+                                &variable_table,
+                                &pre_defined_symbols,
+                            )?;
+                            let left = vals.pop().unwrap().into_cranelift(
+                                &mut builder,
+                                &variable_table,
+                                &pre_defined_symbols,
+                            )?;
 
                             match prim {
                                 Primitive::Plus => builder.ins().iadd(left, right),
@@ -175,7 +184,7 @@ impl ValueOrRef {
 
                 if let Some(global_id) = global_variables.get(name.as_str()) {
                     let val_ptr = builder.ins().symbol_value(types::I64, *global_id);
-                    return Ok(builder.ins().load(types::I64, MemFlags::new(), val_ptr, 0))
+                    return Ok(builder.ins().load(types::I64, MemFlags::new(), val_ptr, 0));
                 }
 
                 Err(ModuleError::Undeclared(name.to_string()))

src/jit/engine.rs

@@ -7,7 +7,7 @@ use cranelift_codegen::{
 };
 use cranelift_jit::{JITBuilder, JITModule};
 use cranelift_module::{DataContext, DataId, Linkage, Module};
-use std::{collections::HashMap, ffi::{CString, CStr}};
+use std::{collections::HashMap, ffi::CStr};
 use target_lexicon::Triple;
 
 const EMPTY_DATUM: [u8; 8] = [0; 8];
@@ -20,7 +20,7 @@ pub struct JITEngine {
     defined_symbols: HashMap<String, DataId>,
 }
 
-extern fn runtime_print(name: *const i8, value: u64) {
+extern "C" fn runtime_print(name: *const i8, value: u64) {
     let cstr = unsafe { CStr::from_ptr(name) };
     let reconstituted = cstr.to_string_lossy();
     println!("{} = {}", reconstituted, value);
@@ -52,7 +52,9 @@ impl JITEngine {
 
     pub fn define_string(&mut self, s: String) -> Result<(), JITError> {
         let name = format!("<string_constant>{}", s);
-        let global_id = self.module.declare_data(&name, Linkage::Local, false, false)?;
+        let global_id = self
+            .module
+            .declare_data(&name, Linkage::Local, false, false)?;
         let mut data_context = DataContext::new();
         data_context.set_align(8);
         data_context.define(s.as_str().to_owned().into_boxed_str().into_boxed_bytes());

src/syntax.rs

@@ -6,7 +6,7 @@ mod location;
 mod simplify;
 mod tokens;
 lalrpop_mod!(
-    #[allow(clippy::just_underscores_and_digits)]
+    #[allow(clippy::just_underscores_and_digits, clippy::clone_on_copy)]
     parser,
     "/syntax/parser.rs"
 );