Update libtest and make examples/cli.rs

README.md

@@ -57,12 +57,12 @@ and not as representative of my skills as a programmer today as this one.
 
 ## What is currently being tested?
 
-Currently when testing the compiler I run `./libtest.sh fibonacci` or
-`./libtest.sh arithmetic`.
+Currently when testing the compiler I run `./libtest.sh reid_src/{file}.reid`,
+where the `{file}` is one of the various examples I've written to help me test
+features of the compiler.
 
-What `./libtest.sh $1` does, is it compiles and runs the rust example found with
-name `$1`, which may exist in any of the two projects. The two mentioned above
-are in `reid/examples`.
+What `./libtest.sh $1` does, is it compiles and runs the rust example found at
+path `$1`. Some pre-existing examples can be found in [`reid_src`](./reid_src)
 
 All examples currently end up producing a `hello.o` and `hello.asm` file to the
 root directory, which is then linked with `ldd` to produce a `main`, which is

libtest.sh

@@ -6,7 +6,7 @@
 # Do note this file is extremely simply for my own personal convenience
 
 export .env
-cargo run --example $1 && \
+cargo run --example cli $1 && \
 # clang hello.o -o main && \
 ld -dynamic-linker /lib64/ld-linux-x86-64.so.2 \
    -o main /usr/lib/crt1.o hello.o -lc  && \

reid/examples/array.rs

@@ -1,11 +0,0 @@
-use reid::compile;
-
-pub static ARRAY: &str = include_str!("./reid/array.reid");
-
-fn main() {
-    let text = match compile(ARRAY) {
-        Ok(t) => t,
-        Err(e) => panic!("{}", e),
-    };
-    println!("{}", text);
-}

reid/examples/cli.rs

@@ -0,0 +1,18 @@
+use std::{env, fs};
+
+use reid::compile;
+
+fn main() -> Result<(), std::io::Error> {
+    let args: Vec<String> = env::args().collect();
+    if let Some(filename) = args.get(1) {
+        let text = fs::read_to_string(filename)?;
+        let output = match compile(&text) {
+            Ok(t) => t,
+            Err(e) => panic!("{}", e),
+        };
+        println!("{}", output);
+    } else {
+        println!("Please input compiled file path!")
+    }
+    Ok(())
+}

reid/examples/fibonacci.rs

@@ -1,11 +0,0 @@
-use reid::compile;
-
-pub static FIBONACCI: &str = include_str!("./reid/fibonacci.reid");
-
-fn main() {
-    let text = match compile(FIBONACCI) {
-        Ok(t) => t,
-        Err(e) => panic!("{}", e),
-    };
-    println!("{}", text);
-}

reid/examples/mutable.rs

@@ -1,11 +0,0 @@
-use reid::compile;
-
-pub static MUTABLE: &str = include_str!("./reid/mutable.reid");
-
-fn main() {
-    let text = match compile(MUTABLE) {
-        Ok(t) => t,
-        Err(e) => panic!("{}", e),
-    };
-    println!("{}", text);
-}

reid/examples/reid/hard.reid

@@ -1,8 +0,0 @@
-// New types, type-casting
-
-import std::print;
-
-let text: string = "hello there!";
-let value: i16 = 123;
-
-print(text + (value as string));

reid/src/lib.rs

@@ -19,7 +19,7 @@
 //!
 //! An example program of Reid, that calculates the 5th fibonacci number (and
 //! uses Rust for highlighting) is:
-//! ```rust
+//! ```reid
 //! fn main() -> u16 {
 //!     return fibonacci(5);
 //! }
@@ -30,6 +30,7 @@
 //!     }
 //!     return fibonacci(n-1) + fibonacci(n-2);
 //! }
+//! ```
 //!
 //! Currently missing relevant features (TODOs) are:
 //! - ~~Arrays~~ (DONE)

reid/src/mir/typecheck.rs

@@ -91,13 +91,13 @@ impl FunctionDefinition {
                 state.scope.return_type_hint = Some(self.return_type.clone());
                 block.typecheck(state, &hints, Some(&return_type))
             }
-            FunctionDefinitionKind::Extern => Ok(Vague(Unknown)),
+            FunctionDefinitionKind::Extern => Ok((ReturnKind::Soft, Vague(Unknown))),
         };
 
         match inferred {
             Ok(t) => return_type
-                .collapse_into(&t)
-                .or(Err(ErrorKind::ReturnTypeMismatch(return_type, t))),
+                .collapse_into(&t.1)
+                .or(Err(ErrorKind::ReturnTypeMismatch(return_type, t.1))),
             Err(e) => Ok(state.or_else(Err(e), return_type, self.block_meta())),
         }
     }
@@ -109,7 +109,7 @@ impl Block {
         state: &mut PassState<ErrorKind>,
         hints: &TypeRefs,
         hint_t: Option<&TypeKind>,
-    ) -> Result<TypeKind, ErrorKind> {
+    ) -> Result<(ReturnKind, TypeKind), ErrorKind> {
         let mut state = state.inner();
 
         let mut early_return = None;
@@ -233,7 +233,7 @@ impl Block {
         if let Some((ReturnKind::Hard, expr)) = early_return {
             let hint = state.scope.return_type_hint.clone();
             let res = expr.typecheck(&mut state, &hints, hint.as_ref());
-            return Ok(state.or_else(res, Vague(Unknown), expr.1));
+            return Ok((ReturnKind::Hard, state.or_else(res, Vague(Unknown), expr.1)));
         }
 
         if let Some((return_kind, expr)) = &mut self.return_expression {
@@ -243,9 +243,9 @@ impl Block {
                 ReturnKind::Soft => hint_t.cloned(),
             };
             let res = expr.typecheck(&mut state, &hints, ret_hint_t.as_ref());
-            Ok(state.or_else(res, Vague(Unknown), expr.1))
+            Ok((*return_kind, state.or_else(res, Vague(Unknown), expr.1)))
         } else {
-            Ok(Void)
+            Ok((ReturnKind::Soft, Void))
         }
     }
 }
@@ -359,14 +359,27 @@ impl Expression {
                 // Typecheck then/else return types and make sure they are the
                 // same, if else exists.
                 let then_res = lhs.typecheck(state, &hints, hint_t);
-                let then_ret_t = state.or_else(then_res, Vague(Unknown), lhs.meta);
+                let (then_ret_kind, then_ret_t) =
+                    state.or_else(then_res, (ReturnKind::Soft, Vague(Unknown)), lhs.meta);
                 let else_ret_t = if let Some(else_block) = rhs {
                     let res = else_block.typecheck(state, &hints, hint_t);
-                    state.or_else(res, Vague(Unknown), else_block.meta)
+                    let (else_ret_kind, else_ret_t) =
+                        state.or_else(res, (ReturnKind::Soft, Vague(Unknown)), else_block.meta);
+
+                    if else_ret_kind == ReturnKind::Hard {
+                        Void
+                    } else {
+                        else_ret_t
+                    }
                 } else {
                     // Else return type is Void if it does not exist
                     Void
                 };
+                let then_ret_t = if then_ret_kind == ReturnKind::Hard {
+                    Void
+                } else {
+                    then_ret_t
+                };
 
                 // Make sure then and else -blocks have the same return type
                 let collapsed = then_ret_t
@@ -384,7 +397,11 @@ impl Expression {
 
                 Ok(collapsed)
             }
-            ExprKind::Block(block) => block.typecheck(state, &hints, hint_t),
+            ExprKind::Block(block) => match block.typecheck(state, &hints, hint_t) {
+                Ok((ReturnKind::Hard, _)) => Ok(Void),
+                Ok((_, ty)) => Ok(ty),
+                Err(e) => Err(e),
+            },
             ExprKind::Index(expression, elem_ty, idx) => {
                 // Try to unwrap hint type from array if possible
                 let hint_t = hint_t.map(|t| match t {

reid_src/array.reid

@@ -5,8 +5,6 @@ fn array() -> [[[u16; 4]; 1]; 1] {
 }
 
 fn main() -> u16 {
-    let heehoo = 10;
-
     let mut list = array();
 
     list[0][0][3] = 5;

reid_src/mutable.reid

@@ -6,11 +6,11 @@ fn indirection() -> bool {
 
 fn main() -> u16 {
     let mut test = 5;
-    let heehoo = 10;
+    let addition = 10;
 
     if indirection() {
         test = 11;
     }
 
-    return test + heehoo;
+    return test + addition;
 }

reid_src/strings.reid

@@ -0,0 +1,7 @@
+
+
+fn main() -> u16 {
+    let hello = "beep boop";
+
+    return 5;
+}