Add an easy way to toggle the procedural macro, so it's easier to test both behaviors.

Author: emilio

Cargo.toml

@@ -31,3 +31,4 @@ quote = "0.3"
 serde-serialization = [ "serde" ]
 heap_size = [ "heapsize" ]
 bench = []
+dummy_match_byte = []

build.rs

@@ -5,15 +5,33 @@ extern crate syn;
 use std::env;
 use std::path::Path;
 
+
+#[cfg(feature = "dummy_match_byte")]
+mod codegen {
+    use std::path::Path;
+    pub fn main(_: &Path) {}
+}
+
+#[cfg(not(feature = "dummy_match_byte"))]
 #[path = "src/macros/mod.rs"]
 mod macros;
 
+#[cfg(not(feature = "dummy_match_byte"))]
+mod codegen {
+    use macros;
+    use std::env;
+    use std::path::Path;
+
+    pub fn main(tokenizer_rs: &Path) {
+        macros::match_byte::expand(tokenizer_rs,
+                                   &Path::new(&env::var("OUT_DIR").unwrap()).join("tokenizer.rs"));
+
+    }
+}
+
 fn main() {
     let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
-
     let tokenizer_rs = Path::new(&manifest_dir).join("src/tokenizer.rs");
-    macros::match_byte::expand(&tokenizer_rs,
-                               &Path::new(&env::var("OUT_DIR").unwrap()).join("tokenizer.rs"));
-
-     println!("cargo:rerun-if-changed={}", tokenizer_rs.display());
+    codegen::main(&tokenizer_rs);
+    println!("cargo:rerun-if-changed={}", tokenizer_rs.display());
 }

src/lib.rs

@@ -137,6 +137,22 @@ macro_rules! match_ignore_ascii_case {
 }
 
 mod rules_and_declarations;
+
+#[cfg(feature = "dummy_match_byte")]
+macro_rules! match_byte {
+    ($value:expr, $($rest:tt)* ) => {
+        match $value {
+            $(
+                $rest
+            )+
+        }
+    };
+}
+
+#[cfg(feature = "dummy_match_byte")]
+mod tokenizer;
+
+#[cfg(not(feature = "dummy_match_byte"))]
 mod tokenizer {
     include!(concat!(env!("OUT_DIR"), "/tokenizer.rs"));
 }