{"record":{"id":"6163ff42f263a389","repo":"DioxusLabs/dioxus","slug":"expected-a-single-statement-in-the-if-block","errorCode":null,"errorMessage":"Expected a single statement in the if block","messagePattern":"Expected a single statement in the if block","errorType":"validation","errorClass":"syn::Error","httpStatus":null,"severity":"error","filePath":"packages/rsx/src/attribute.rs","lineNumber":636,"sourceCode":"            match expr {\n                AttributeValue::IfExpr(if_expr) => if_expr.contains_expression(),\n                AttributeValue::AttrLiteral(_) => false,\n                _ => true,\n            }\n        }\n\n        attribute_value_contains_expression(&self.then_value)\n            || self\n                .else_value\n                .as_deref()\n                .is_some_and(attribute_value_contains_expression)\n    }\n\n    fn parse_attribute_value_from_block(block: &Block) -> syn::Result<Box<AttributeValue>> {\n        let stmts = &block.stmts;\n\n        if stmts.len() != 1 {\n            return Err(syn::Error::new(\n                block.span(),\n                \"Expected a single statement in the if block\",\n            ));\n        }\n\n        // either an ifmt or an expr in the block\n        let stmt = &stmts[0];\n\n        // Either it's a valid ifmt or an expression\n        match stmt {\n            syn::Stmt::Expr(exp, None) => {\n                // Try parsing the statement as an IfmtInput by passing it through tokens\n                let value: Result<HotLiteral, syn::Error> = syn::parse2(exp.to_token_stream());\n                Ok(match value {\n                    Ok(res) => Box::new(AttributeValue::AttrLiteral(res)),\n                    Err(_) => Box::new(AttributeValue::AttrExpr(PartialExpr::from_expr(exp))),\n                })\n            }","sourceCodeStart":618,"sourceCodeEnd":654,"githubUrl":"https://github.com/DioxusLabs/dioxus/blob/393d190a801ccb441d41923e232289b4f8a5c669/packages/rsx/src/attribute.rs#L618-L654","documentation":"Error \"Expected a single statement in the if block\" thrown in DioxusLabs/dioxus.","triggerScenarios":"Thrown at packages/rsx/src/attribute.rs:636 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"393d190a801ccb441d41923e232289b4f8a5c669","analyzedAt":"2026-08-16T11:27:45.815Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}