d7805e5974
Extended PatternPipelineContext and CarrierUpdateInfo for Pattern 3 AST-based generalization. Changes: 1. PatternPipelineContext: - Added loop_condition: Option<ASTNode> - Added loop_body: Option<Vec<ASTNode>> - Added loop_update_summary: Option<LoopUpdateSummary> - Updated build_pattern_context() for Pattern 3 2. CarrierUpdateInfo: - Added then_expr: Option<ASTNode> - Added else_expr: Option<ASTNode> - Updated analyze_loop_updates() with None defaults Status: Phase 213-2 Steps 2-2 & 2-3 complete Next: Create Pattern3IfAnalyzer to extract if statement and populate update summary
32 lines
1.2 KiB
Markdown
32 lines
1.2 KiB
Markdown
# Dev Sugar: @name = expr as local declaration
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Status: dev-only, pre-expand sugar (no spec change)
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Goal
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- Speed up local declarations during development without impacting readability in shared code.
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Syntax (dev sugar)
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- Line-head only:
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- `@name = expr` → `local name = expr`
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- `@name: Type = expr` → `local name: Type = expr`
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Rules
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- Valid only at line start (leading spaces allowed). Inside expressions it is ignored.
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- Declaration-only: not allowed for reassignments; use `name = expr` for assignments.
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- Semantics are identical to `local` (scope/cleanup unchanged). Zero runtime cost.
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Enablement
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- Use the provided pre-expander script for dev: `tools/dev/at_local_preexpand.sh`.
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- Example:
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- `tools/dev/at_local_preexpand.sh apps/tests/dev_sugar/at_local_basic.hako > /tmp/out.hako`
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- `NYASH_VM_USE_PY=1 ./target/release/hakorune --backend vm /tmp/out.hako`
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Style
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- Shared/committed code: prefer explicit `local` (nyfmt may normalize @ to `local`).
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- Dev/repl/prototype: `@` is acceptable to reduce noise.
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Notes
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- This is a text pre-expansion; it does not change the parser or MIR.
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- The pattern is conservative to avoid collisions with comments and inline usages.
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