add test_mono_macros crate

compiler/test_mono_macros/src/lib.rs

@@ -0,0 +1,46 @@
+#![warn(clippy::dbg_macro)]
+// See github.com/rtfeldman/roc/issues/800 for discussion of the large_enum_variant check.
+#![allow(clippy::large_enum_variant)]
+// we actually want to compare against the literal float bits
+#![allow(clippy::clippy::float_cmp)]
+
+extern crate proc_macro;
+
+use proc_macro::{Span, TokenStream};
+use quote::{format_ident, quote};
+use syn::spanned::Spanned;
+
+// pub mod gen_compare;
+// pub mod gen_dict;
+// pub mod gen_hash;
+// pub mod gen_list;
+// pub mod gen_num;
+// pub mod gen_primitives;
+// pub mod gen_records;
+// pub mod gen_result;
+// pub mod gen_set;
+// pub mod gen_str;
+// pub mod gen_tags;
+// mod helpers;
+
+#[proc_macro_attribute]
+pub fn mono_test(args: TokenStream, item: TokenStream) -> TokenStream {
+    let macro_args = syn::parse_macro_input!(args as syn::AttributeArgs);
+    let task_fn = syn::parse_macro_input!(item as syn::ItemFn);
+
+    let mut arg_names: syn::punctuated::Punctuated<syn::Ident, syn::Token![,]> =
+        syn::punctuated::Punctuated::new();
+    let mut args = task_fn.sig.inputs.clone();
+
+    let name = task_fn.sig.ident.clone();
+    let body = task_fn.block.clone();
+
+    let visibility = &task_fn.vis;
+
+    let result = quote! {
+        #visibility fn #name(#args) {
+            println!( #body);
+        }
+    };
+    result.into()
+}