import from root (@ prefix)

TODO.md

@@ -626,7 +626,11 @@
   - `heap.free(ptr ?*mut u8) void` forwards to C `free`, including `none` / null
   - typed allocation, allocator parameters, arenas/pools, build-mode heap policy, and escaping-allocation diagnostics remain deferred
 
-26. comptime polymorphism (zig inspired)
+26. import from project "root" (implemented)
+  - imports beginning with `@` resolve from the compiler process cwd / project root
+  - `heap :: import "@std/mem/heap"` works from any package depth without `../../../` path math
+
+27. comptime polymorphism (zig inspired)
 
 ## A word on multi-unwrap
 

compiler/loader/loader.odin

@@ -25,6 +25,7 @@ State :: struct {
 	allocator:       mem.Allocator,
 	c_options:       cimport.Options,
 	selected:        target.Target,
+	project_root:    string,
 	record_identities: [dynamic]string,
 	record_types:      [dynamic]types.Type,
 	root_failed:     bool,
@@ -100,7 +101,13 @@ resolve_import_path :: proc(state: ^State, importing_path, import_path: string)
 	if filepath.is_abs(import_path) {
 		return "", false
 	}
-	joined, join_error := filepath.join({importing_path, import_path}, state.allocator)
+	base := importing_path
+	path := import_path
+	if strings.has_prefix(import_path, "@") {
+		base = state.project_root
+		path = import_path[1:]
+	}
+	joined, join_error := filepath.join({base, path}, state.allocator)
 	if join_error != nil {
 		return "", false
 	}
@@ -1406,6 +1413,10 @@ load :: proc(
 	selected := target.DEFAULT,
 ) -> (ast.Module, bool) {
 	module := ast.init_module(allocator)
+	project_root, project_root_ok := filepath.abs(".", allocator)
+	if !project_root_ok {
+		project_root = strings.clone(".", allocator)
+	}
 	state := State{
 		module=&module,
 		sources=sources,
@@ -1415,10 +1426,12 @@ load :: proc(
 		allocator=allocator,
 		c_options=c_options,
 		selected=selected,
+		project_root=project_root,
 	}
 	state.record_identities.allocator = allocator
 	state.record_types.allocator = allocator
 	defer {
+		delete(state.project_root, allocator)
 		for identity in state.record_identities {
 			delete(identity, allocator)
 		}

examples/programs/heap/main.bro

@@ -1,4 +1,4 @@
-heap :: import "../../../std/mem/heap"
+heap :: import "@std/mem/heap"
 
 printf c_func(fmt *c_char, ...) c_int