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Do not propagate constants if shadowed.

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This commit is contained in:
Stephen Chung
2020-12-08 22:20:29 +08:00
parent aff207d4f4
commit 8e8069f819
3 changed files with 64 additions and 43 deletions
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12
tests/optimizer.rs
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@@ -53,15 +53,19 @@ fn test_optimizer_parse() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
engine.set_optimization_level(OptimizationLevel::Simple);
let ast = engine.compile("{ const DECISION = false; if DECISION { 42 } }")?;
let ast = engine.compile("{ const DECISION = false; if DECISION { 42 } else { 123 } }")?;
assert!(format!("{:?}", ast).starts_with("AST([], Module("));
engine.set_optimization_level(OptimizationLevel::Full);
assert!(format!("{:?}", ast).starts_with(r#"AST([Block([Const(Ident { name: "DECISION", pos: 1:9 }, Some(Unit(0:0)), false, 1:3), Expr(IntegerConstant(123, 1:53))], 1:1)]"#));
let ast = engine.compile("if 1 == 2 { 42 }")?;
assert!(format!("{:?}", ast).starts_with("AST([], Module("));
engine.set_optimization_level(OptimizationLevel::Full);
let ast = engine.compile("abs(-42)")?;
assert!(format!("{:?}", ast).starts_with(r"AST([Expr(IntegerConstant(42, 1:1))]"));
Ok(())
}