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Chris Tate
e48b2c3435
The runtime format branch packed its arguments with a checked-dynamic array literal, a dynamic operation: a console.log with a string first argument put its function in the dynamic tier, and the property-bag analysis read the format calls as possible dynamic stores. The held arguments now go to the formatter as a native list of checked values (insp.formatList and insp.formatPrimitives), which is a tier boundary, and the format and inspect entries join the helpers that never store into a class instance. A first argument whose type may hold a string only through a union, or whose checker type does not map, packed every argument as a checked value and failed to compile when one did not convert (7380's `console.log(top ? [...top] : "none", byName)`). It now takes the held-argument form: the lowered value is tested for a substitution and otherwise joins as before. In TypeScript an argument without a checked-dynamic form is refused at compile time only when the joined form cannot print it either; otherwise the branch that substitutes throws SC2020, as in JavaScript.