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Add loop expressions.

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This commit is contained in:
Stephen Chung
2022-10-29 12:09:18 +08:00
parent 6af66d3ed3
commit c14fbdb14d
10 changed files with 146 additions and 73 deletions
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28
src/api/options.rs
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@@ -12,23 +12,25 @@ bitflags! {
const IF_EXPR = 0b_0000_0000_0001;
/// Is `switch` expression allowed?
const SWITCH_EXPR = 0b_0000_0000_0010;
/// Are loop expressions allowed?
const LOOP_EXPR = 0b_0000_0000_0100;
/// Is statement-expression allowed?
const STMT_EXPR = 0b_0000_0000_0100;
const STMT_EXPR = 0b_0000_0000_1000;
/// Is anonymous function allowed?
#[cfg(not(feature = "no_function"))]
const ANON_FN = 0b_0000_0000_1000;
const ANON_FN = 0b_0000_0001_0000;
/// Is looping allowed?
const LOOPING = 0b_0000_0001_0000;
const LOOPING = 0b_0000_0010_0000;
/// Is variables shadowing allowed?
const SHADOW = 0b_0000_0010_0000;
const SHADOW = 0b_0000_0100_0000;
/// Strict variables mode?
const STRICT_VAR = 0b_0000_0100_0000;
const STRICT_VAR = 0b_0000_1000_0000;
/// Raise error if an object map property does not exist?
/// Returns `()` if `false`.
#[cfg(not(feature = "no_object"))]
const FAIL_ON_INVALID_MAP_PROPERTY = 0b_0000_1000_0000;
const FAIL_ON_INVALID_MAP_PROPERTY = 0b_0001_0000_0000;
/// Fast operators mode?
const FAST_OPS = 0b_0001_0000_0000;
const FAST_OPS = 0b_0010_0000_0000;
}
}
@@ -81,6 +83,18 @@ impl Engine {
pub fn set_allow_switch_expression(&mut self, enable: bool) {
self.options.set(LangOptions::SWITCH_EXPR, enable);
}
/// Are loop expressions allowed?
/// Default is `true`.
#[inline(always)]
#[must_use]
pub const fn allow_loop_expressions(&self) -> bool {
self.options.contains(LangOptions::LOOP_EXPR)
}
/// Set whether loop expressions are allowed.
#[inline(always)]
pub fn set_allow_loop_expressions(&mut self, enable: bool) {
self.options.set(LangOptions::LOOP_EXPR, enable);
}
/// Is statement-expression allowed?
/// Default is `true`.
#[inline(always)]