Add platform expression strategy runtime

crates/fidc-core/src/data.rs

@@ -843,6 +843,19 @@ impl DataSet {
                 symbol: symbol.to_string(),
             })
     }
+
+    pub fn require_factor(
+        &self,
+        date: NaiveDate,
+        symbol: &str,
+    ) -> Result<&DailyFactorSnapshot, DataSetError> {
+        self.factor(date, symbol)
+            .ok_or_else(|| DataSetError::MissingSnapshot {
+                kind: "factor",
+                date,
+                symbol: symbol.to_string(),
+            })
+    }
 }
 
 fn read_instruments(path: &Path) -> Result<Vec<Instrument>, DataSetError> {

crates/fidc-core/src/lib.rs

@@ -7,6 +7,7 @@ pub mod events;
 pub mod instrument;
 pub mod metrics;
 pub mod portfolio;
+pub mod platform_expr_strategy;
 pub mod rules;
 pub mod strategy;
 pub mod universe;
@@ -27,6 +28,7 @@ pub use events::{AccountEvent, FillEvent, OrderEvent, OrderSide, OrderStatus, Po
 pub use instrument::Instrument;
 pub use metrics::{BacktestMetrics, compute_backtest_metrics};
 pub use portfolio::{CashReceivable, HoldingSummary, PortfolioState, Position};
+pub use platform_expr_strategy::{PlatformExprStrategy, PlatformExprStrategyConfig};
 pub use rules::{ChinaEquityRuleHooks, EquityRuleHooks, RuleCheck};
 pub use strategy::{
     CnSmallCapRotationConfig, CnSmallCapRotationStrategy, JqMicroCapConfig, JqMicroCapStrategy,