Allow opting out of building default wasm bindings

Cargo.toml

@@ -7,6 +7,10 @@ edition = "2018"
 [lib]
 crate-type = ["lib", "cdylib"]
 
+[features]
+default = ["wasm"]
+wasm = [] # Build default wasm bindings
+
 [dependencies]
 anyhow = "1.0.44"
 csv = "1.1.6"

src/lib.rs

@@ -50,5 +50,5 @@ use wasm_bindgen::prelude::wasm_bindgen;
 pub const VERSION: &str = git_version!(args=["--always", "--dirty=-dev"], fallback="unknown");
 
 /// Get [VERSION] as a String (for WebAssembly)
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 pub fn version() -> String { VERSION.to_string() }

src/stv/mod.rs

@@ -38,6 +38,7 @@ use crate::ties::{self, TieStrategy};
 use derive_builder::Builder;
 use derive_more::Constructor;
 use itertools::Itertools;
+#[allow(unused_imports)]
 use wasm_bindgen::prelude::wasm_bindgen;
 
 use std::collections::HashMap;
@@ -229,7 +230,7 @@ impl STVOptions {
 }
 
 /// Enum of options for [STVOptions::sum_surplus_transfers]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum SumSurplusTransfersMode {
@@ -260,7 +261,7 @@ impl<S: AsRef<str>> From<S> for SumSurplusTransfersMode {
 }
 
 /// Enum of options for [STVOptions::quota]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum QuotaType {
@@ -299,7 +300,7 @@ impl<S: AsRef<str>> From<S> for QuotaType {
 }
 
 /// Enum of options for [STVOptions::quota_criterion]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum QuotaCriterion {
@@ -330,7 +331,7 @@ impl<S: AsRef<str>> From<S> for QuotaCriterion {
 }
 
 /// Enum of options for [STVOptions::quota_mode]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum QuotaMode {
@@ -373,7 +374,7 @@ impl<S: AsRef<str>> From<S> for QuotaMode {
 }
 
 /// Enum of options for [STVOptions::surplus]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum SurplusMethod {
@@ -429,7 +430,7 @@ impl<S: AsRef<str>> From<S> for SurplusMethod {
 }
 
 /// Enum of options for [STVOptions::surplus_order]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum SurplusOrder {
@@ -460,7 +461,7 @@ impl<S: AsRef<str>> From<S> for SurplusOrder {
 }
 
 /// Enum of options for [STVOptions::exclusion]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum ExclusionMethod {
@@ -503,7 +504,7 @@ impl<S: AsRef<str>> From<S> for ExclusionMethod {
 }
 
 /// Enum of options for [STVOptions::sample]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 #[derive(Clone, Copy)]
 #[derive(PartialEq)]
 pub enum SampleMethod {

src/stv/wasm.rs

@@ -50,13 +50,13 @@ macro_rules! wasm_error {
 // Init
 
 /// Wrapper for [Fixed::set_dps]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 pub fn fixed_set_dps(dps: usize) {
 	Fixed::set_dps(dps);
 }
 
 /// Wrapper for [GuardedFixed::set_dps]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 pub fn gfixed_set_dps(dps: usize) {
 	GuardedFixed::set_dps(dps);
 }
@@ -68,7 +68,7 @@ macro_rules! impl_type {
 		// Counting
 		
 		/// Wrapper for [blt::parse_iterator]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<election_from_blt_$type>](text: String) -> [<Election$type>] {
 			// Install panic! hook
@@ -82,21 +82,21 @@ macro_rules! impl_type {
 		}
 		
 		/// Call [Constraints::from_con] and set [Election::constraints]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<election_load_constraints_$type>](election: &mut [<Election$type>], text: String) {
 			election.0.constraints = Some(Constraints::from_con(text.lines().map(|s| s.to_string()).into_iter()));
 		}
 		
 		/// Wrapper for [stv::preprocess_election]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<preprocess_election_$type>](election: &mut [<Election$type>], opts: &STVOptions) {
 			stv::preprocess_election(&mut election.0, &opts.0);
 		}
 		
 		/// Wrapper for [stv::count_init]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<count_init_$type>](state: &mut [<CountState$type>], opts: &STVOptions) {
 			match stv::count_init(&mut state.0, opts.as_static()) {
@@ -106,7 +106,7 @@ macro_rules! impl_type {
 		}
 		
 		/// Wrapper for [stv::count_one_stage]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<count_one_stage_$type>](state: &mut [<CountState$type>], opts: &STVOptions) -> bool {
 			match stv::count_one_stage::<[<$type>]>(&mut state.0, &opts.0) {
@@ -118,42 +118,42 @@ macro_rules! impl_type {
 		// Reporting
 		
 		/// Wrapper for [init_results_table]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<init_results_table_$type>](election: &[<Election$type>], opts: &STVOptions, report_style: &str) -> String {
 			return init_results_table(&election.0, &opts.0, report_style);
 		}
 		
 		/// Wrapper for [describe_count]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<describe_count_$type>](filename: String, election: &[<Election$type>], opts: &STVOptions) -> String {
 			return describe_count(filename, &election.0, &opts.0);
 		}
 		
 		/// Wrapper for [update_results_table]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<update_results_table_$type>](stage_num: usize, state: &[<CountState$type>], opts: &STVOptions, report_style: &str) -> Array {
 			return update_results_table(stage_num, &state.0, &opts.0, report_style);
 		}
 		
 		/// Wrapper for [update_stage_comments]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<update_stage_comments_$type>](state: &[<CountState$type>], stage_num: usize) -> String {
 			return update_stage_comments(&state.0, stage_num);
 		}
 		
 		/// Wrapper for [finalise_results_table]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<finalise_results_table_$type>](state: &[<CountState$type>], report_style: &str) -> Array {
 			return finalise_results_table(&state.0, report_style);
 		}
 		
 		/// Wrapper for [final_result_summary]
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		#[allow(non_snake_case)]
 		pub fn [<final_result_summary_$type>](state: &[<CountState$type>], opts: &STVOptions) -> String {
 			return final_result_summary(&state.0, &opts.0);
@@ -165,9 +165,9 @@ macro_rules! impl_type {
 		///
 		/// This is required as `&'static` cannot be specified in wasm-bindgen: see [issue 1187](https://github.com/rustwasm/wasm-bindgen/issues/1187).
 		///
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		pub struct [<CountState$type>](CountState<'static, $type>);
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		impl [<CountState$type>] {
 			/// Create a new [CountState] wrapper
 			pub fn new(election: &[<Election$type>]) -> Self {
@@ -187,9 +187,9 @@ macro_rules! impl_type {
 		///
 		/// This is required as `&'static` cannot be specified in wasm-bindgen: see [issue 1187](https://github.com/rustwasm/wasm-bindgen/issues/1187).
 		///
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		pub struct [<Election$type>](Election<$type>);
-		#[wasm_bindgen]
+		#[cfg_attr(feature = "wasm", wasm_bindgen)]
 		impl [<Election$type>] {
 			/// Return [Election::seats]
 			pub fn seats(&self) -> usize { self.0.seats }
@@ -215,10 +215,10 @@ impl_type!(NativeFloat64);
 impl_type!(Rational);
 
 /// Wrapper for [stv::STVOptions]
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 pub struct STVOptions(stv::STVOptions);
 
-#[wasm_bindgen]
+#[cfg_attr(feature = "wasm", wasm_bindgen)]
 impl STVOptions {
 	/// Wrapper for [stv::STVOptions::new]
 	pub fn new(