Add to_sql module. (#49)

* Add to_sql module

* wip

* Test passing

* Add tests to makefile

---------

Co-authored-by: matt <[email protected]>

Author: 1BADragon

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["rscel", "python", "wasm", "rscel-macro"]
+members = ["rscel", "python", "wasm", "rscel-macro", "extensions/to_sql"]
 default-members = ["rscel"]
 resolver = "2"
 

Makefile

@@ -36,6 +36,9 @@ all: wasm-binding python-binding build
 run-tests:
 	RSCEL_TEST_PROTO=1 cargo test -q $(CARGO_ARGS)
 
+run-no-sql-tests:
+	cargo test --manifest-path=extensions/to_sql/Cargo.toml -q
+
 run-no-feature-tests:
 	cargo test -q --no-default-features $(CARGO_ARGS)
 
@@ -55,4 +58,4 @@ run-wasm-tests:
 	$(MAKE_COMMAND) -C wasm wasm-tests
 
 .PHONY: run-all-tests
-run-all-tests: run-tests run-no-feature-tests run-python-tests run-wasm-tests
+run-all-tests: run-tests run-no-feature-tests run-no-sql-tests run-python-tests run-wasm-tests

extensions/to_sql/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "rscel-to-sql"
+version = { workspace = true }
+edition = { workspace = true }
+description = { workspace = true }
+license = { workspace = true }
+readme = "../README.md"
+
+[dependencies]
+rscel = { path = "../../rscel" }
+
+[dev-dependencies]
+test-case = "3.3.1"

extensions/to_sql/examples/cel2sql.rs

@@ -0,0 +1,22 @@
+use rscel::Program;
+use rscel_to_sql::IntoSqlBuilder;
+use std::env;
+
+fn main() {
+    let args = env::args().collect::<Vec<_>>();
+
+    if args.len() < 2 {
+        panic!("No program passed")
+    }
+
+    let p = Program::from_source(&args[1]).expect("Failed to compile program");
+
+    let sql_builder = p
+        .ast()
+        .unwrap()
+        .into_sql_builder()
+        .expect("Failed to generate SQL builder");
+    let sql = sql_builder.to_sql().expect("Failed to generate SQL");
+
+    println!("{}", sql);
+}

extensions/to_sql/src/ast.rs

@@ -0,0 +1,10 @@
+use rscel::AstNode;
+
+use crate::error::ToSqlError;
+use crate::traits::{IntoSqlBuilder, SqlBuilder};
+
+impl<T: IntoSqlBuilder> IntoSqlBuilder for AstNode<T> {
+    fn into_sql_builder(&self) -> Result<Box<dyn SqlBuilder>, ToSqlError> {
+        self.node().into_sql_builder()
+    }
+}

extensions/to_sql/src/error.rs

@@ -0,0 +1,22 @@
+#[derive(Debug)]
+pub enum ToSqlError {
+    Unsupported(String),
+}
+
+pub type ToSqlResult<T> = Result<T, ToSqlError>;
+
+impl ToSqlError {
+    pub fn unsupported(error_msg: &str) -> Self {
+        ToSqlError::Unsupported(error_msg.to_owned())
+    }
+}
+
+impl std::fmt::Display for ToSqlError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            ToSqlError::Unsupported(msg) => write!(f, "Unsupported: {}", msg),
+        }
+    }
+}
+
+impl std::error::Error for ToSqlError {}