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//! The small semantic-style enum every caixa tool agrees on.
use serde::{Deserialize, Serialize};
#[derive(
Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, gen_platform::IsVariant,
)]
pub enum Semantic {
/// Language keywords — `defcaixa`, `defteia`, `let`, `lambda`, etc.
Keyword,
/// Non-keyword symbols — identifiers, function names, variant names.
Symbol,
/// `:keyword-positioned` atoms.
KeywordArg,
/// `"string literals"`.
String,
/// `42`, `3.14`.
Number,
/// `#t`, `#f`, `nil`.
Literal,
/// `; comments`.
Comment,
/// Primary accent — useful for highlights, carets, focused tokens.
Accent,
/// Dim text — metadata, line numbers, help text.
Muted,
// Diagnostic severities.
Error,
Warning,
Info,
Hint,
// Diff decorations — used by formatter preview and lint output.
Added,
Removed,
Unchanged,
}
impl Semantic {
/// Every variant of [`Semantic`] in declaration order.
///
/// The single canonical arm-list every substrate consumer that has
/// to walk the closed 15-arm semantic-style partition (the two
/// theme overlays' exhaustive-match resolver functions
/// `blackmatter_dark_color` / `blackmatter_light_color` in
/// [`crate::blackmatter`], the future LSP-side per-Semantic
/// `SemanticTokenType` dispatch at
/// `caixa-lsp/src/main.rs`, a future
/// `feira lint --list-styles` operator-facing enumeration verb)
/// reads for. Peer of the sibling closed-set fieldless typed
/// enums' `ALL` slices already carried by
/// [`caixa_core::CaixaKind`] /
/// [`caixa_core::supervisor::RestartStrategy`] /
/// [`caixa_core::supervisor::RestartPolicy`] /
/// [`caixa_core::aplicacao::PlacementStrategy`] /
/// [`caixa_core::upgrade::UpgradeInstruction`] /
/// `caixa_lint::diagnostic::Severity` /
/// `caixa_lint::diagnostic::FixSafety` /
/// `caixa_arch::InvariantKind` / `caixa_arch::ArchVerdict` /
/// `caixa_provedor::FerriteRuntime` closed-set typed-enum
/// discriminator axes.
pub const ALL: &'static [Self] = &[
Self::Keyword,
Self::Symbol,
Self::KeywordArg,
Self::String,
Self::Number,
Self::Literal,
Self::Comment,
Self::Accent,
Self::Muted,
Self::Error,
Self::Warning,
Self::Info,
Self::Hint,
Self::Added,
Self::Removed,
Self::Unchanged,
];
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn semantic_all_enumerates_every_variant_in_declaration_order() {
// Fail-before-pass-after pin on the [`Semantic::ALL`] slice:
// the slice must list every one of the 15 variants in
// declaration order (Keyword → Symbol → KeywordArg → String →
// Number → Literal → Comment → Accent → Muted → Error →
// Warning → Info → Hint → Added → Removed → Unchanged). Peer
// of the sibling ALL slices on the closed-set typed-enum
// discriminator axes ([`caixa_core::CaixaKind::ALL`],
// [`caixa_core::supervisor::RestartStrategy::ALL`],
// [`caixa_core::supervisor::RestartPolicy::ALL`],
// [`caixa_core::aplicacao::PlacementStrategy::ALL`],
// [`caixa_core::upgrade::UpgradeInstruction::ALL`]). A future
// arm addition (a `Namespace` tier between `Symbol` and
// `KeywordArg` for the M4 tatara-lisp module system's
// qualified-name semantic-token dispatch, a `Deleted` tier
// for a hard-delete-mark distinct from `Removed` the future
// 3-way diff surface grows) that lands the arm on the enum
// but forgets to extend `ALL` must trip this pin rather than
// surface as a downstream consumer's silently-partial
// iteration.
assert_eq!(
Semantic::ALL,
&[
Semantic::Keyword,
Semantic::Symbol,
Semantic::KeywordArg,
Semantic::String,
Semantic::Number,
Semantic::Literal,
Semantic::Comment,
Semantic::Accent,
Semantic::Muted,
Semantic::Error,
Semantic::Warning,
Semantic::Info,
Semantic::Hint,
Semantic::Added,
Semantic::Removed,
Semantic::Unchanged,
],
);
// Also pin the per-arm `IsVariant`-derived partition: every
// arm in `ALL` must satisfy exactly one of the 15 generated
// arm-discriminator predicates.
for variant in Semantic::ALL {
let row = [
variant.is_keyword(),
variant.is_symbol(),
variant.is_keyword_arg(),
variant.is_string(),
variant.is_number(),
variant.is_literal(),
variant.is_comment(),
variant.is_accent(),
variant.is_muted(),
variant.is_error(),
variant.is_warning(),
variant.is_info(),
variant.is_hint(),
variant.is_added(),
variant.is_removed(),
variant.is_unchanged(),
];
let hits = row.iter().filter(|b| **b).count();
assert_eq!(
hits, 1,
"Semantic::{variant:?} must satisfy exactly one of the \
15 is_* arm-discriminator predicates; got {row:?}",
);
}
}
#[test]
fn semantic_is_variant_predicates_partition_the_arm_set() {
// Fail-before-pass-after pin on the [`gen_platform::IsVariant`]
// derive: for each of the 15 variants, exactly one of the
// generated is_* predicates returns `true` and the other 14
// return `false`. Pre-derive the closed 15-arm partition
// lived only inside the two theme overlays' 15-arm match
// resolvers; a future rebrand (a `#[is_variant(name = "…")]`
// drift, a manual hand-rolled `impl` that shadows the
// derive-generated method, an arm rename) trips this pin at
// caixa-theme build time rather than surfacing far from the
// derive declaration. Peer of the sibling
// [`caixa_core::CaixaKind`] `IsVariant` partition pin.
// A copy-paste flip that reroutes one arm through the wrong
// predicate lane trips at the identity-diagonal assertion,
// since each variant's row is generated live from `ALL`'s
// declaration order rather than transcribed by hand.
for (idx, variant) in Semantic::ALL.iter().enumerate() {
let observed: [bool; 16] = [
variant.is_keyword(),
variant.is_symbol(),
variant.is_keyword_arg(),
variant.is_string(),
variant.is_number(),
variant.is_literal(),
variant.is_comment(),
variant.is_accent(),
variant.is_muted(),
variant.is_error(),
variant.is_warning(),
variant.is_info(),
variant.is_hint(),
variant.is_added(),
variant.is_removed(),
variant.is_unchanged(),
];
let mut expected = [false; 16];
expected[idx] = true;
assert_eq!(
observed, expected,
"Semantic::{variant:?} at ALL[{idx}] is_* predicates \
must fire only on their own arm lane (identity \
diagonal); got {observed:?}",
);
}
}
#[test]
fn semantic_is_variant_predicates_are_const_fn() {
// The [`gen_platform::IsVariant`] derive emits `const fn`
// predicates on the peer [`caixa_core::CaixaKind`] /
// [`caixa_core::upgrade::UpgradeInstruction`] /
// [`caixa_core::supervisor::RestartStrategy`] /
// [`caixa_core::supervisor::RestartPolicy`] closed-set typed
// enums — pin the same posture on [`Semantic`] so a future
// accidental downgrade to non-`const` (an added runtime helper
// reachable only from a non-`const` context, a manual hand-
// rolled `impl` that shadows the derive-generated method)
// trips at caixa-theme build time rather than surfacing as a
// downstream `const`-context regression far from the derive
// declaration.
const { assert!(Semantic::Keyword.is_keyword()) };
const { assert!(Semantic::Error.is_error()) };
const { assert!(Semantic::Added.is_added()) };
const { assert!(Semantic::Unchanged.is_unchanged()) };
}
}