Emerge Yul recompiler (#1)

Provide a modified (and incomplete) version of ZKSync zksolc that can compile the most basic contracts

crates/solidity/src/warning.rs

@@ -0,0 +1,58 @@
+//!
+//! The compiler warning.
+//!
+
+use std::str::FromStr;
+
+use serde::Deserialize;
+use serde::Serialize;
+
+///
+/// The compiler warning.
+///
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Warning {
+    /// The warning for eponymous feature.
+    EcRecover,
+    /// The warning for eponymous feature.
+    SendTransfer,
+    /// The warning for eponymous feature.
+    ExtCodeSize,
+    /// The warning for eponymous feature.
+    TxOrigin,
+    /// The warning for eponymous feature.
+    BlockTimestamp,
+    /// The warning for eponymous feature.
+    BlockNumber,
+    /// The warning for eponymous feature.
+    BlockHash,
+}
+
+impl Warning {
+    ///
+    /// Converts string arguments into an array of warnings.
+    ///
+    pub fn try_from_strings(strings: &[String]) -> Result<Vec<Self>, anyhow::Error> {
+        strings
+            .iter()
+            .map(|string| Self::from_str(string))
+            .collect()
+    }
+}
+
+impl FromStr for Warning {
+    type Err = anyhow::Error;
+
+    fn from_str(string: &str) -> Result<Self, Self::Err> {
+        match string {
+            "ecrecover" => Ok(Self::EcRecover),
+            "sendtransfer" => Ok(Self::SendTransfer),
+            "extcodesize" => Ok(Self::ExtCodeSize),
+            "txorigin" => Ok(Self::TxOrigin),
+            "blocktimestamp" => Ok(Self::BlockTimestamp),
+            "blocknumber" => Ok(Self::BlockNumber),
+            "blockhash" => Ok(Self::BlockHash),
+            _ => Err(anyhow::anyhow!("Invalid warning: {}", string)),
+        }
+    }
+}