From 32fa47b52b03f4ae84bc773bad785cf77334ae78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Edvard=20Th=C3=B6rnros?= <edvard.thornros@gmail.com>
Date: Tue, 12 Jan 2021 18:49:11 +0100
Subject: WIP for-loop

---
 src/compiler.rs  | 36 ++++++++++++++++++++++++++++++++++++
 tests/simple.tdy | 30 +++++++++++++++++++++++-------
 2 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/src/compiler.rs b/src/compiler.rs
index 15d92fd..c542412 100644
--- a/src/compiler.rs
+++ b/src/compiler.rs
@@ -373,6 +373,38 @@ impl Compiler {
             block.patch(Op::JmpFalse(block.curr()), jump);
         }
 
+        self.expression(block);
+        self.scope(block);
+
+        // Loop variable
+        block.add(Op::Pop, self.line());
+    }
+
+    fn for(&mut self, block: &mut Block) {
+        expect!(self, Token::For, "Expected 'for' at start of for-loop.");
+
+        self.level += 1;
+        let h = self.stack.len();
+
+        match self.peek_four() {
+            (Token::Identifier(name), Token::Identifier(typ), Token::ColonEqual, _) => {
+                self.eat();
+                self.eat();
+                self.eat();
+                if let Ok(typ) = Type::try_from(typ.as_ref()) {
+                    self.define_variable(&name, typ, block);
+                } else {
+                    error!(self, format!("Failed to parse type '{}'.", typ));
+                }
+            }
+
+            (Token::Identifier(name), Token::ColonEqual, _, _) => {
+                self.eat();
+                self.eat();
+                self.define_variable(&name, Type::UnkownType, block);
+            }
+        }
+
     }
 
     fn statement(&mut self, block: &mut Block) {
@@ -412,6 +444,10 @@ impl Compiler {
                 self.if_statment(block);
             }
 
+            (Token::For, _, _, _) => {
+                self.for(block);
+            }
+
             (Token::Unreachable, _, _, _) => {
                 self.eat();
                 block.add(Op::Unreachable, self.line());
diff --git a/tests/simple.tdy b/tests/simple.tdy
index 3fe05a4..d07aad7 100644
--- a/tests/simple.tdy
+++ b/tests/simple.tdy
@@ -13,12 +13,28 @@
 // print d
 // print c
 
-a int := 2
-if a == 0 {
-    print "123"
-} else if a == 1 {
-    print "BCD"
-} else {
-    print "ABC"
+
+for a := 0, a >= 0, a = a - 1 {
+    if a == 2 {
+        continue
+    }
+    print a
+}
+
+for a := 0, a >= 0, a = a - 1 {
+    if a == 2 {
+        continue
+    }
+    print a
+}
+
+a = 0
+
+fiv a in something {
 }
+
+something.each((x) -> {
+
+}
+
 // 1, 2, 3, 4
-- 
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