From 506e260c759b431269079089310a6af159aa1bf0 Mon Sep 17 00:00:00 2001
From: Jesse Brault <jbrault@mac.com>
Date: Mon, 2 Mar 2026 12:51:39 -0600
Subject: [PATCH] Add logic for checking if callee is platform fn.

---
 dmc-lib/src/asm/mod.rs  |  2 +-
 dmc-lib/src/ast/call.rs | 21 ++++++++++++++++-----
 dmc-lib/src/symbol.rs   |  4 ++++
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/dmc-lib/src/asm/mod.rs b/dmc-lib/src/asm/mod.rs
index a4dc20a..7e611dd 100644
--- a/dmc-lib/src/asm/mod.rs
+++ b/dmc-lib/src/asm/mod.rs
@@ -22,7 +22,7 @@ mod smoke_tests {
     fn multiple_statements() {
         let asm_functions = assemble(
             "
-            fn println() end
+            extern fn println()
             fn main()
                 let x = 42
                 println(x)
diff --git a/dmc-lib/src/ast/call.rs b/dmc-lib/src/ast/call.rs
index 7e85571..aeb95d5 100644
--- a/dmc-lib/src/ast/call.rs
+++ b/dmc-lib/src/ast/call.rs
@@ -143,14 +143,25 @@ impl Call {
                 },
             }
         }
-        let function_name = match self.callee() {
-            Expression::Identifier(identifier) => identifier.name(),
+
+        let function_symbol = match self.callee() {
+            Expression::Identifier(identifier) => {
+                let expressible_symbol = identifier.expressible_symbol();
+                match expressible_symbol {
+                    ExpressibleSymbol::Function(function_symbol) => function_symbol.clone(),
+                    _ => panic!("Calling things other than functions not yet supported."),
+                }
+            }
             _ => panic!("Calling things other than identifiers not yet supported."),
         };
 
-        context.instruction(AsmInstruction::InvokePlatformStatic(
-            InvokePlatformStatic::new(function_name),
-        ));
+        if function_symbol.is_platform() {
+            context.instruction(AsmInstruction::InvokePlatformStatic(
+                InvokePlatformStatic::new(function_symbol.name()),
+            ));
+        } else {
+            todo!("non-platform invoke")
+        }
     }
 
     pub fn source_range(&self) -> &SourceRange {
diff --git a/dmc-lib/src/symbol.rs b/dmc-lib/src/symbol.rs
index 93fcc0c..b3d2fba 100644
--- a/dmc-lib/src/symbol.rs
+++ b/dmc-lib/src/symbol.rs
@@ -32,6 +32,10 @@ impl FunctionSymbol {
     pub fn return_type(&self) -> TypeInfo {
         todo!()
     }
+
+    pub fn is_platform(&self) -> bool {
+        self.is_platform
+    }
 }
 
 pub struct ParameterSymbol {