feat: improve unsafe template engine

Author: ansurfen

.gitignore

@@ -39,3 +39,5 @@ coverage.txt
 *.tgz
 
 node_modules/
+
+preprocessor/

examples/preprocessor_demo.hl

@@ -0,0 +1,46 @@
+fn main() {
+    comptime {
+        echo "Current line: $LINE"
+        echo "Current file: $FILE"
+        echo "Target platform: $TARGET"
+
+        if $TARGET == "vbs" {
+            echo "VBScript target detected at line $LINE"
+        } else if $TARGET == "ps" {
+            echo "PowerShell target detected at line $LINE"
+        }
+    }
+
+    unsafe """
+        echo "Hello from line {{ $LINE }}"
+        echo "File: {{ $FILE }}"
+        echo "Target: {{ $TARGET }}"
+
+        {{ if $TARGET == "vbs" }}
+        echo "VBScript code here"
+        {{ else }}
+        echo "Other platform code here"
+        {{ end }}
+    """
+
+    comptime {
+        echo "Outer comptime at line $LINE"
+
+        unsafe """
+            echo "Inner unsafe at line {{ $LINE }}"
+            echo "Generated from template"
+        """
+    }
+}
+
+fn process_data() {
+    comptime {
+        echo "Processing data at line $LINE"
+        echo "Function: process_data"
+    }
+
+    unsafe """
+        echo "Data processing at line {{ $LINE }}"
+        echo "Function: {{ $FUNCTION }}"
+    """
+}

internal/README.md

@@ -78,7 +78,7 @@ func (interp *Interpreter) Eval(node ast.Node) ast.Node {
 		return interp.rebuildFuncDecl(node)
 	case *ast.CommentGroup:
 		return interp.rebuildCommentGroup(node)
-	case *ast.UnsafeStmt:
+	case *ast.UnsafeExpr:
 		return interp.rebuildUnsafeStmt(node)
 	case *ast.ExternDecl:
 		return interp.rebuildExternDecl(node)
@@ -373,7 +373,7 @@ func (interp *Interpreter) rebuildCallExpr(node *ast.CallExpr) ast.Node {
 	return &ast.CallExpr{Fun: newFun.(ast.Expr), Recv: newRecv}
 }
 
-func (interp *Interpreter) rebuildUnsafeStmt(node *ast.UnsafeStmt) ast.Node {
+func (interp *Interpreter) rebuildUnsafeStmt(node *ast.UnsafeExpr) ast.Node {
 	return node
 }