Reformat types string for decl_storage (#1298)

* Clean space from types when converting to string

* Missing cases.

* Add unit test for complex type, complete clean fn.

substrate/srml/support/procedural/src/storage/transformation.rs

@@ -19,7 +19,7 @@
 // end::description[]
 
 use srml_support_procedural_tools::syn_ext as ext;
-use srml_support_procedural_tools::{generate_crate_access, generate_hidden_includes};
+use srml_support_procedural_tools::{generate_crate_access, generate_hidden_includes, clean_type_string};
 
 use proc_macro::TokenStream;
 use proc_macro2::TokenStream as TokenStream2;
@@ -577,7 +577,7 @@ fn store_functions_to_metadata (
 		let is_option = extracted_opt.is_some();
 		let typ = extracted_opt.unwrap_or(quote!( #gettype ));
 		let stype = if is_simple {
-			let styp = typ.to_string();
+			let styp = clean_type_string(&typ.to_string());
 			quote!{
 				#scrate::storage::generator::StorageFunctionType::Plain(
 					#scrate::storage::generator::DecodeDifferent::Encode(#styp),
@@ -585,8 +585,8 @@ fn store_functions_to_metadata (
 			}
 		} else {
 			let kty = stk.expect("is not simple; qed");
-			let kty = quote!(#kty).to_string();
+			let kty = clean_type_string(&quote!(#kty).to_string());
-			let styp = typ.to_string();
+			let styp = clean_type_string(&typ.to_string());
 			quote!{
 				#scrate::storage::generator::StorageFunctionType::Map {
 					key: #scrate::storage::generator::DecodeDifferent::Encode(#kty),

substrate/srml/support/procedural/tools/src/lib.rs

@@ -92,3 +92,22 @@ pub fn generate_hidden_includes(unique_id: &str, def_crate: &str, crate_id: &str
 		)
 	}.into()
 }
+
+// fn to remove white spaces arount string types
+// (basically whitespaces arount tokens)
+pub fn clean_type_string(input: &str) -> String {
+	input
+		.replace(" ::", "::")
+		.replace(":: ", "::")
+		.replace(" ,", ",")
+		.replace(" ;", ";")
+		.replace(" [", "[")
+		.replace("[ ", "[")
+		.replace(" ]", "]")
+		.replace(" (", "(")
+		.replace("( ", "(")
+		.replace(" )", ")")
+		.replace(" <", "<")
+		.replace("< ", "<")
+		.replace(" >", ">")
+}

substrate/srml/support/src/storage/generator.rs

@@ -633,6 +633,10 @@ mod tests {
 
 			GETMAPU32MYDEF get(map_u32_getter_mydef): map u32 => String = "map".into();
 			pub PUBGETMAPU32MYDEF get(pub_map_u32_getter_mydef): map u32 => String = "pubmap".into();
+
+			COMPLEX_TYPE1: ::std::vec::Vec<<T as Trait>::Origin>;
+			COMPLEX_TYPE2: (Vec<Vec<(u16,Box<(  )>)>>, u32);
+			COMPLEX_TYPE3: ([u32;25]);
 		}
 		add_extra_genesis {
 			build(|_, _, _| {});
@@ -677,7 +681,7 @@ mod tests {
 			StorageFunctionMetadata {
 				name: DecodeDifferent::Encode("GETU32"),
 				modifier: StorageFunctionModifier::Default,
-				ty: StorageFunctionType::Plain(DecodeDifferent::Encode("T :: Origin")),
+				ty: StorageFunctionType::Plain(DecodeDifferent::Encode("T::Origin")),
 				documentation: DecodeDifferent::Encode(&[]),
 			},
 			StorageFunctionMetadata {
@@ -796,6 +800,24 @@ mod tests {
 				},
 				documentation: DecodeDifferent::Encode(&[]),
 			},
+			StorageFunctionMetadata {
+				name: DecodeDifferent::Encode("COMPLEX_TYPE1"),
+				modifier: StorageFunctionModifier::Default,
+				ty: StorageFunctionType::Plain(DecodeDifferent::Encode("::std::vec::Vec<<T as Trait>::Origin>")),
+				documentation: DecodeDifferent::Encode(&[]),
+			},
+			StorageFunctionMetadata {
+				name: DecodeDifferent::Encode("COMPLEX_TYPE2"),
+				modifier: StorageFunctionModifier::Default,
+				ty: StorageFunctionType::Plain(DecodeDifferent::Encode("(Vec<Vec<(u16, Box<()>)>>, u32)")),
+				documentation: DecodeDifferent::Encode(&[]),
+			},
+			StorageFunctionMetadata {
+				name: DecodeDifferent::Encode("COMPLEX_TYPE3"),
+				modifier: StorageFunctionModifier::Default,
+				ty: StorageFunctionType::Plain(DecodeDifferent::Encode("([u32; 25])")),
+				documentation: DecodeDifferent::Encode(&[]),
+			},
 		])
 	};
 
@@ -816,6 +838,7 @@ mod tests {
 		assert_eq!(config.pub_u32_getter_with_config_mydef, 1u32);
 		assert_eq!(config.pub_u32_getter_with_config_mydef_opt, 100u32);
 	}
+
 }
 
 #[cfg(test)]