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aw-query: Add preprocessing and refcounting
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| use aw_datastore::Datastore; | ||
|
|
||
| use crate::ast::*; | ||
| use crate::DataType; | ||
| use crate::QueryError; | ||
| use crate::VarEnv; | ||
|
|
||
| pub fn preprocess_prog( | ||
| p: &Program, | ||
| env: &mut VarEnv, | ||
| ds: &Datastore, | ||
| ) -> Result<(), QueryError> { | ||
| for expr in &p.stmts { | ||
| preprocess_expr(env, ds, expr)?; | ||
| } | ||
| Ok(()) | ||
| } | ||
|
|
||
| fn preprocess_expr( | ||
| env: &mut VarEnv, | ||
| ds: &Datastore, | ||
| expr: &Expr, | ||
| ) -> Result<(), QueryError> { | ||
| use crate::ast::Expr_::*; | ||
| match &expr.node { | ||
| Var(ref var) => env.add_ref(var)?, | ||
| Add(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Sub(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Mul(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Div(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Mod(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Equal(ref a, ref b) => { | ||
| preprocess_expr(env, ds, a)?; | ||
| preprocess_expr(env, ds, b)?; | ||
| } | ||
| Assign(ref var, ref b) => { | ||
| preprocess_expr(env, ds, b)?; | ||
| env.declare(var.to_string()); | ||
| }, | ||
| Function(ref fname, ref args) => { | ||
| env.add_ref(fname)?; | ||
| preprocess_expr(env, ds, args)?; | ||
| } | ||
| If(ref ifs) => { | ||
| for (cond, block) in ifs { | ||
| // TODO: could be optimized? | ||
| preprocess_expr(env, ds, cond)?; | ||
| for expr in block { | ||
| preprocess_expr(env, ds, expr)?; | ||
| } | ||
| } | ||
| } | ||
| List(list) => { | ||
| for entry in list { | ||
| preprocess_expr(env, ds, entry)?; | ||
| } | ||
| } | ||
| Dict(d) => { | ||
| for (key, val_uninterpreted) in d { | ||
| preprocess_expr(env, ds, val_uninterpreted)?; | ||
| } | ||
| } | ||
| Return(e) => { | ||
| println!("return!"); | ||
| preprocess_expr(env, ds, e)?; | ||
| }, | ||
| Bool(_lit) => (), | ||
| Number(_lit) => (), | ||
| String(_lit) => (), | ||
| }; | ||
| Ok(()) | ||
| } |
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