lab/sx
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

lang F1 6: contextually type pack-fn prefix args (mapper lambda)

Browse Source 
lowerPackFnCall lowered the runtime prefix args with no target_type, so a
lambda arg (mapper: Closure(...) -> ...) could not infer its param types.
Now set target_type to the param type while lowering each prefix arg. With
the existing value-projection call-arg spread, mapper(..sources.get) works:
the lambda is contextually typed and the projected values spread into the
call. examples/211 ((a,b)=>a+b over two sources -> 42). 246 + unit green.
This commit is contained in:
agra
2026-05-30 03:15:07 +03:00
parent 87ee3d3e65
commit 66c4ee168b
4 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/ir/lower.zig
View File

@@ -9195,7 +9195,13 @@ pub const Lowering = struct {
if (isPackParam(p)) break;
if (ri >= call_node.args.len) break;
if (!p.is_comptime) {
// Contextually type the arg from the param (so a lambda arg
// `(x) => …` takes its param types from a `Closure(...)` param).
const saved_tt = self.target_type;
const pty = self.resolveParamType(&p);
if (pty != .unresolved) self.target_type = pty;
args.append(self.alloc, self.lowerExpr(call_node.args[ri])) catch return self.builder.constInt(0, .void);
self.target_type = saved_tt;
}
ri += 1;
}