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48 lines
1.8 KiB
Rust
48 lines
1.8 KiB
Rust
//! Grouped `CompileCtx` sub-contexts.
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//!
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//! Splits the compiler's central `CompileCtx` so syntax-domain workers borrow
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//! only the slice they need: `LabelCtx` for jump-target resolution, `ScopeCtx`
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//! for identifier binding. `PatternCtx` is reserved for destructuring work.
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//! Execution-stream fields (insts, registers, pc, …) stay flat on
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//! `CompileCtx`.
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use crate::symbol_table::SymbolTable;
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use crate::LabelScope;
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use oxide_ir::operand::LabelId;
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/// Jump-target / labeled-statement resolution state.
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pub(crate) struct LabelCtx {
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/// label id → 指令下标。id 连续递增，Vec 索引即 id；写入前须扩容。
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pub(crate) label_pos: Vec<Option<usize>>,
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pub(crate) loop_stack: Vec<(LabelId, LabelId)>,
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pub(crate) switch_stack: Vec<LabelId>,
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/// Active labeled-statement scopes (resolves `break label` / `continue label`).
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pub(crate) label_scopes: Vec<LabelScope>,
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/// Label names awaiting binding to the next emitted loop's continue target.
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pub(crate) pending_loop_labels: Vec<String>,
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pub(crate) label_counter: u32,
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}
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impl LabelCtx {
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/// 按 id 扩容后写入 label 定义位置。
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pub(crate) fn set_label_pos(&mut self, id: LabelId, pos: usize) {
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if id as usize >= self.label_pos.len() {
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self.label_pos.resize(id as usize + 1, None);
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}
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self.label_pos[id as usize] = Some(pos);
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}
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}
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/// Identifier-binding state: symbols, builtin registers, private names.
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pub(crate) struct ScopeCtx {
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pub(crate) symbols: SymbolTable,
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pub(crate) builtin_reg_map: Vec<(String, u8)>,
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pub(crate) private_name_map: Vec<(String, u32)>,
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pub(crate) next_private_name_id: u32,
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}
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/// Reserved for destructuring-pattern state (Phase 15). Intentionally empty
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/// today; named so future pattern work has a home without touching `ScopeCtx`.
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#[allow(dead_code)]
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pub(crate) struct PatternCtx;
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