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stage2: don't call comptime functions with generic poison arguments

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When calling a comptime or inline function, if the parameter is generic and
is resolved to generic_poison or generic_poison_type, the invocation was
part of another function's parameters or return type expression and is
dependent on an as-of-yet type of another parameter. In this case, processing
should stop, and we return error.GenericPoison to let the caller in funcCommon,
zirParam or zirParamAnytype know that the function is generic.
This commit is contained in:
Robin Voetter 2021-12-27 01:22:57 +01:00
parent c710d5eefe
commit 41e52bd5cc
1 changed files with 16 additions and 0 deletions
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16
src/Sema.zig
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@ -3888,6 +3888,14 @@ fn analyzeCall(
if (is_comptime_call) {
const arg_val = try sema.resolveConstMaybeUndefVal(&child_block, arg_src, casted_arg);
switch (arg_val.tag()) {
.generic_poison, .generic_poison_type => {
// This function is currently evaluated as part of an as-of-yet unresolvable
// parameter or return type.
return error.GenericPoison;
},
else => {},
}
memoized_call_key.args[arg_i] = .{
.ty = param_ty,
.val = arg_val,
@ -3905,6 +3913,14 @@ fn analyzeCall(
if (is_comptime_call) {
const arg_src = call_src; // TODO: better source location
const arg_val = try sema.resolveConstMaybeUndefVal(&child_block, arg_src, uncasted_arg);
switch (arg_val.tag()) {
.generic_poison, .generic_poison_type => {
// This function is currently evaluated as part of an as-of-yet unresolvable
// parameter or return type.
return error.GenericPoison;
},
else => {},
}
memoized_call_key.args[arg_i] = .{
.ty = sema.typeOf(uncasted_arg),
.val = arg_val,