updated compiler to support multiple frontends and backends

compiler/src/frontend/dsc/mod.rs

@@ -0,0 +1,38 @@
+use common::logging::log;
+
+use crate::model::{CompilerError, Program};
+use parser::{ParseResult, Parser};
+use semantic_analyser::Analyser;
+
+pub mod lexer;
+pub mod parser;
+pub mod semantic_analyser;
+
+pub fn generate_ast(input: &str) -> Result<Program, CompilerError> {
+    log("Tokenising Input...");
+
+    let lexer = lexer::Lexer::new(&input);
+    let tokens = lexer.collect::<Vec<_>>();
+    // println!("{tokens:?}");
+
+    log(&format!("Parsing {} Tokens...", tokens.len()));
+
+    let mut parser = Parser::new(tokens);
+    let ast = match parser.parse() {
+        ParseResult::Accept(ast) => ast,
+        ParseResult::Reject(e) => return Err(e),
+        ParseResult::Deny => {
+            return Err(CompilerError::Generic("Parser used ::Deny".to_string()));
+        }
+    };
+    // println!("{ast:#?}");
+
+    log("Analyzing AST...");
+    log("Checking Type Information...");
+
+    let analyser = Analyser::new();
+    analyser.analyse(ast.clone()).unwrap();
+
+    log("Type Checking Complete...");
+    Ok(ast)
+}