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sema: print @panic message at comptime

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xdBronch 2025-11-07 07:53:04 -05:00 committed by Matthew Lugg
parent d942f693c5
commit fb914a9a10
2 changed files with 26 additions and 7 deletions
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31
src/Sema.zig
View File

@ -2024,7 +2024,9 @@ fn resolveConstString(
block: *Block,
src: LazySrcLoc,
zir_ref: Zir.Inst.Ref,
reason: ComptimeReason,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) ![]u8 {
const air_inst = try sema.resolveInst(zir_ref);
return sema.toConstString(block, src, air_inst, reason);
@ -2035,7 +2037,9 @@ pub fn toConstString(
block: *Block,
src: LazySrcLoc,
air_inst: Air.Inst.Ref,
reason: ComptimeReason,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) ![]u8 {
const pt = sema.pt;
const coerced_inst = try sema.coerce(block, .slice_const_u8, air_inst, src);
@ -2261,6 +2265,8 @@ fn resolveConstValue(
block: *Block,
src: LazySrcLoc,
inst: Air.Inst.Ref,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) CompileError!Value {
return try sema.resolveValue(inst) orelse {
@ -2288,6 +2294,8 @@ fn resolveConstDefinedValue(
block: *Block,
src: LazySrcLoc,
air_ref: Air.Inst.Ref,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) CompileError!Value {
const val = try sema.resolveConstValue(block, src, air_ref, reason);
@ -2317,7 +2325,14 @@ pub fn resolveFinalDeclValue(
return val;
}
fn failWithNeededComptime(sema: *Sema, block: *Block, src: LazySrcLoc, reason: ?ComptimeReason) CompileError {
fn failWithNeededComptime(
sema: *Sema,
block: *Block,
src: LazySrcLoc,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) CompileError {
const msg, const fail_block = msg: {
const msg = try sema.errMsg(src, "unable to resolve comptime value", .{});
errdefer msg.destroy(sema.gpa);
@ -5569,10 +5584,12 @@ fn zirPanic(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void
const src = block.nodeOffset(inst_data.src_node);
const msg_inst = try sema.resolveInst(inst_data.operand);
const coerced_msg = try sema.coerce(block, .slice_const_u8, msg_inst, block.builtinCallArgSrc(inst_data.src_node, 0));
const arg_src = block.builtinCallArgSrc(inst_data.src_node, 0);
const coerced_msg = try sema.coerce(block, .slice_const_u8, msg_inst, arg_src);
if (block.isComptime()) {
return sema.fail(block, src, "encountered @panic at comptime", .{});
const string = try sema.resolveConstString(block, arg_src, inst_data.operand, null);
return sema.fail(block, src, "encountered @panic at comptime: {s}", .{string});
}
// We only apply the first hint in a branch.
@ -37261,7 +37278,9 @@ fn derefSliceAsArray(
block: *Block,
src: LazySrcLoc,
slice_val: Value,
reason: ComptimeReason,
/// `null` may be passed only if `block.isComptime()`. It indicates that the reason for the value
/// being comptime-resolved is that the block is being comptime-evaluated.
reason: ?ComptimeReason,
) CompileError!Value {
return try sema.maybeDerefSliceAsArray(block, src, slice_val) orelse {
return sema.failWithNeededComptime(block, src, reason);

2
test/cases/compile_errors/panic_called_at_compile_time.zig
View File

@ -8,4 +8,4 @@ export fn entry() void {
// error
//
// :3:9: error: encountered @panic at comptime
// :3:9: error: encountered @panic at comptime: aoeu