struct Vec2 { x: u8, y: u8 }
var pos: Vec2 = Vec2 { x: 100, y: 50 }
on frame {
pos = Vec2 { x: pos.x + 1, y: pos.y }
}
- AST: new \`Expr::StructLiteral(name, fields, span)\` variant
- Parser: in expression position, \`Ident {\` enters struct-literal
mode when the new \`restrict_struct_literals\` flag is off.
\`if\`/\`while\`/\`for\` conditions set the flag so the \`{\` keeps
going to the following block. Condition contexts can still use
struct literals by parenthesizing them.
- Analyzer: validates that the struct type exists, each named field
belongs to it, and each field value has a compatible type.
- IR lowering: desugars \`var = StructLiteral { ... }\` (both in
assignments and variable initializers) into per-field StoreVar
operations against the analyzer-synthesized \`var.field\`
variables. No IR type for struct values is needed.
- AST codegen: no-op (legacy path).
- examples/structs_enums_for.ne now uses a struct literal for the
initial \`player\` state instead of per-field assignments.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
A small platformer scaffold that exercises every recent language
feature in one place:
- \`struct Player { ... }\` with u8 and bool fields
- \`enum Direction { Up, Down, Left, Right }\`
- \`enum AnimFrame { Idle, Run1, Run2 }\`
- \`for i in 0..4 { ... }\` looping over a fixed-size array
- Struct field assignment and reads
- Enum variant assignment
Compiles through the default IR codegen and links cleanly.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
