Error when no source files are input

i3abghany · Nov 2, 2023 · 3de8722 · 3de8722
1 parent 6a431e4
commit 3de8722
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Showing 3 changed files with 9 additions and 2 deletions.
diff --git a/src/main.rs b/src/main.rs
@@ -1,10 +1,10 @@
 mod code_generation;
-mod compilation;
 mod lexical_analysis;
 mod syntax_analysis;
 mod utils;
 
 use clap::Parser;
+use crate::utils::compilation;
 
 #[derive(Parser, Debug)]
 #[clap(about, long_about = None)]
@@ -34,11 +34,17 @@ fn main() {
         + args.exe_filename.is_some() as usize;
 
     if exclusive_args_count > 1 {
-        panic!("Cannot specify more than one option from [-l, -c, -s, -o] at one time");
+        eprintln!("Error: cannot specify more than one option from [-l, -c, -s, -o] at one time");
+        return;
     } else if exclusive_args_count == 0 {
         args.exe_filename = Some("a.out".to_string());
     }
 
+    if args.input_source_files.is_empty() {
+        eprintln!("Error: at least one source file has to be provided");
+        return;
+    }
+
     let compilation = compilation::Compilation::new();
     for filename in &args.input_source_files {
         let source = std::fs::read_to_string(&filename).unwrap();

diff --git a/src/compilation.rs → src/utils/compilation.rs b/src/compilation.rs → src/utils/compilation.rs
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
@@ -1 +1,2 @@
 pub mod test_utils;
+pub mod compilation;