initial commit

temp.rs

@@ -0,0 +1,40 @@
+extern crate proc_macro;
+use proc_macro::TokenStream;
+use proc_macro::TokenTree;
+use proc_macro::Ident;
+use proc_macro::Span;
+use std::iter::FromIterator;
+static mut TEMP_COUNTER: i64 = 0;
+
+#[proc_macro]
+pub fn temp(item: TokenStream) -> TokenStream {
+    let mut iterator = item.clone().into_iter().peekable();
+    if item.is_empty() {
+	unsafe { TEMP_COUNTER += 1; }
+    } else if let Some(TokenTree::Literal(_)) = iterator.peek() {
+	if let Ok(number) = item.to_string().parse::<i64>() {
+	    unsafe { TEMP_COUNTER = number; }
+	}
+    } else if let Some(TokenTree::Punct(i)) = iterator.next() {
+	if i.as_char() == '+' {
+	    if let Some(TokenTree::Literal(i)) = iterator.next() {
+		if let Ok(number) = i.to_string().parse::<i64>() {
+		    unsafe { TEMP_COUNTER += number; }
+		}
+	    }
+	} else if i.as_char() == '-' {
+	    if let Some(TokenTree::Literal(i)) = iterator.next() {
+		if let Ok(number) = i.to_string().parse::<i64>() {
+		    unsafe { TEMP_COUNTER -= number; }
+		}
+	    } else if let None = iterator.next() {
+		
+	    }
+	}
+    } else {
+	panic!("Invalid input to temporary variable generator.");
+    }
+    TokenStream::from_iter([
+	TokenTree::Ident(Ident::new(format!("temp{}", unsafe { TEMP_COUNTER }).as_str(), Span::call_site()))
+    ])
+}