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[C#] minor improvement to reduce unused using statements #1070

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Merged
silesmo merged 3 commits into from
Nov 19, 2024
Merged

[C#] minor improvement to reduce unused using statements #1070

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ffd21d0
minor improvement to reduce unused using statements
yowl Oct 27, 2024
162371b
tidy usings, update to net10
yowl Nov 12, 2024
542e095
cargo fmt
yowl Nov 12, 2024
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77 changes: 54 additions & 23 deletions crates/csharp/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,18 +25,6 @@ use wit_component::{StringEncoding, WitPrinter};
mod csproj;
pub use csproj::CSProject;

//TODO remove unused
const CSHARP_IMPORTS: &str = "\
using System;
using System.Runtime.CompilerServices;
using System.Collections;
using System.Runtime.InteropServices;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
";

#[derive(Default, Debug, Clone)]
#[cfg_attr(feature = "clap", derive(clap::Args))]
pub struct Opts {
Expand Down Expand Up @@ -133,6 +121,8 @@ pub enum FunctionLevel {
pub struct CSharp {
opts: Opts,
name: String,
//TODO remove unused
usings: HashSet<String>,
return_area_size: usize,
return_area_align: usize,
tuple_counts: HashSet<usize>,
Expand Down Expand Up @@ -196,6 +186,13 @@ impl CSharp {
(String::new(), String::new())
}
}

fn require_using(&mut self, using_ns: &str) {
if !self.usings.contains(using_ns) {
let using_ns_string = using_ns.to_string();
self.usings.insert(using_ns_string);
}
}
}

impl WorldGenerator for CSharp {
Expand Down Expand Up @@ -405,9 +402,11 @@ impl WorldGenerator for CSharp {

let access = self.access_modifier();

let using_pos = src.len();

uwrite!(
src,
"{CSHARP_IMPORTS}
"

namespace {world_namespace} {{

Expand All @@ -434,6 +433,7 @@ impl WorldGenerator for CSharp {
src.push_str("}\n");

if self.needs_result {
self.require_using("System.Runtime.InteropServices");
uwrite!(
src,
r#"
Expand Down Expand Up @@ -495,6 +495,7 @@ impl WorldGenerator for CSharp {
}

if self.needs_option {
self.require_using("System.Diagnostics.CodeAnalysis");
uwrite!(
src,
r#"
Expand Down Expand Up @@ -525,6 +526,7 @@ impl WorldGenerator for CSharp {
}

if self.needs_interop_string {
self.require_using("System.Text");
uwrite!(
src,
r#"
Expand Down Expand Up @@ -568,6 +570,8 @@ impl WorldGenerator for CSharp {

let (array_size, element_type) =
dotnet_aligned_array(self.return_area_size, self.return_area_align);

self.require_using("System.Runtime.CompilerServices");
uwrite!(
ret_area_str,
"
Expand Down Expand Up @@ -623,6 +627,16 @@ impl WorldGenerator for CSharp {

src.push_str("}\n");

src.insert_str(
using_pos,
&self
.usings
.iter()
.map(|s| "using ".to_owned() + s + ";")
.collect::<Vec<String>>()
.join("\n"),
);

files.push(&format!("{name}.cs"), indent(&src).as_bytes());

let generate_stub = |name: String, files: &mut Files, stubs: Stubs| {
Expand Down Expand Up @@ -668,8 +682,6 @@ impl WorldGenerator for CSharp {

let body = format!(
"{header}
{CSHARP_IMPORTS}

namespace {fully_qualified_namespace};

{access} partial class {stub_class_name} : {interface_or_class_name} {{
Expand Down Expand Up @@ -789,14 +801,20 @@ impl WorldGenerator for CSharp {
if body.len() > 0 {
let body = format!(
"{header}
{CSHARP_IMPORTS}
{0}

namespace {namespace};

{access} interface {interface_name} {{
{body}
}}
"
",
&self
.usings
.iter()
.map(|s| "using ".to_owned() + s + ";")
.collect::<Vec<String>>()
.join("\n"),
);

files.push(&format!("{full_name}.cs"), indent(&body).as_bytes());
Expand All @@ -812,15 +830,21 @@ impl WorldGenerator for CSharp {
let class_name = interface_name.strip_prefix("I").unwrap();
let body = format!(
"{header}
{CSHARP_IMPORTS}
{0}

namespace {namespace}
{{
{access} static class {class_name}Interop {{
{body}
}}
}}
"
",
&self
.usings
.iter()
.map(|s| "using ".to_owned() + s + ";\n")
.collect::<Vec<String>>()
.join("\n"),
);

files.push(
Expand Down Expand Up @@ -1082,6 +1106,8 @@ impl InterfaceGenerator<'_> {

let import_name = &func.name;

self.gen.require_using("System.Runtime.InteropServices");

let target = if let FunctionKind::Freestanding = &func.kind {
&mut self.csharp_interop_src
} else {
Expand Down Expand Up @@ -1229,6 +1255,7 @@ impl InterfaceGenerator<'_> {
let export_name = func.legacy_core_export_name(core_module_name.as_deref());
let access = self.gen.access_modifier();

self.gen.require_using("System.Runtime.InteropServices");
uwrite!(
self.csharp_interop_src,
r#"
Expand Down Expand Up @@ -1482,6 +1509,7 @@ impl InterfaceGenerator<'_> {
.map(|s| format!("{}#", self.resolve.name_world_key(s)))
.unwrap_or_else(String::new);

self.gen.require_using("System.Runtime.InteropServices");
uwrite!(
self.csharp_interop_src,
r#"
Expand Down Expand Up @@ -2584,10 +2612,13 @@ impl Bindgen for FunctionBindgen<'_, '_> {
self.gen.gen.needs_interop_string = true;
}

Instruction::StringLift { .. } => results.push(format!(
"Encoding.UTF8.GetString((byte*){}, {})",
operands[0], operands[1]
)),
Instruction::StringLift { .. } => {
self.gen.gen.require_using("System.Text");
results.push(format!(
"Encoding.UTF8.GetString((byte*){}, {})",
operands[0], operands[1]
));
}

Instruction::ListLower { element, realloc } => {
let Block {
Expand Down
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