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agra
2026-02-16 02:08:17 +02:00
parent c8ceceed0f
commit 66034b4fec
1 changed files with 33 additions and 41 deletions
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74
src/codegen.zig
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@@ -4085,12 +4085,35 @@ pub const CodeGen = struct {
return self.genSliceLiteral(node.data.array_literal, target_ty);
}
// Infer source type once for all coercion checks below
const src_ty = self.inferType(node);
// Array to slice coercion: [N]T → []T
if (target_ty.isSlice()) {
const src_ty = self.inferType(node);
if (src_ty.isArray()) {
const arr_info = src_ty.array_type;
// Get the alloca pointer for the array (not the loaded value)
if (target_ty.isSlice() and src_ty.isArray()) {
const arr_info = src_ty.array_type;
// Get the alloca pointer for the array (not the loaded value)
const arr_alloca = blk: {
if (node.data == .identifier) {
if (self.named_values.get(node.data.identifier.name)) |entry| {
break :blk entry.ptr;
}
}
if (node.data == .field_access) {
break :blk try self.genAddressOf(node);
}
// Fallback: generate the expression and hope it returns a pointer
break :blk try self.genExpr(node);
};
// GEP to get pointer to first element
const elem_ptr = self.arrayDecayToPointer(self.typeToLLVM(src_ty), arr_alloca, "arr_data");
// Build slice struct {ptr, len}
return self.buildFatPointer(self.getStringStructType(), elem_ptr, self.constInt64(arr_info.length));
}
// Array to many-pointer coercion: [N]T → [*]T
if (target_ty.isManyPointer() and src_ty.isArray()) {
const arr_info = src_ty.array_type;
if (std.mem.eql(u8, arr_info.element_name, target_ty.many_pointer_type.element_name)) {
const arr_alloca = blk: {
if (node.data == .identifier) {
if (self.named_values.get(node.data.identifier.name)) |entry| {
@@ -4100,52 +4123,22 @@ pub const CodeGen = struct {
if (node.data == .field_access) {
break :blk try self.genAddressOf(node);
}
// Fallback: generate the expression and hope it returns a pointer
break :blk try self.genExpr(node);
};
// GEP to get pointer to first element
const elem_ptr = self.arrayDecayToPointer(self.typeToLLVM(src_ty), arr_alloca, "arr_data");
// Build slice struct {ptr, len}
return self.buildFatPointer(self.getStringStructType(), elem_ptr, self.constInt64(arr_info.length));
}
}
// Array to many-pointer coercion: [N]T → [*]T
if (target_ty.isManyPointer()) {
const src_ty = self.inferType(node);
if (src_ty.isArray()) {
const arr_info = src_ty.array_type;
if (std.mem.eql(u8, arr_info.element_name, target_ty.many_pointer_type.element_name)) {
const arr_alloca = blk: {
if (node.data == .identifier) {
if (self.named_values.get(node.data.identifier.name)) |entry| {
break :blk entry.ptr;
}
}
if (node.data == .field_access) {
break :blk try self.genAddressOf(node);
}
break :blk try self.genExpr(node);
};
return self.arrayDecayToPointer(self.typeToLLVM(src_ty), arr_alloca, "arr_decay");
}
return self.arrayDecayToPointer(self.typeToLLVM(src_ty), arr_alloca, "arr_decay");
}
}
// Slice to many-pointer coercion: []T → [*]T (extract .ptr from fat pointer)
if (target_ty.isManyPointer()) {
const src_ty = self.inferType(node);
if (src_ty.isSlice()) {
if (std.mem.eql(u8, src_ty.slice_type.element_name, target_ty.many_pointer_type.element_name)) {
const slice_val = try self.genExpr(node);
return self.extractValue(slice_val, 0, "slice_decay");
}
if (target_ty.isManyPointer() and src_ty.isSlice()) {
if (std.mem.eql(u8, src_ty.slice_type.element_name, target_ty.many_pointer_type.element_name)) {
const slice_val = try self.genExpr(node);
return self.extractValue(slice_val, 0, "slice_decay");
}
}
// Implicit address-of: passing T where *T is expected → auto &
if (target_ty.isPointer()) {
const src_ty = self.inferType(node);
const pointee_name = target_ty.pointer_type.pointee_name;
const src_matches = if (src_ty.isStruct())
std.mem.eql(u8, src_ty.struct_type, pointee_name) or
@@ -4170,7 +4163,6 @@ pub const CodeGen = struct {
}
var val = try self.genExpr(node);
const src_ty = self.inferType(node);
// Struct literals return alloca pointers — load the value for by-value passing
if (src_ty.isStruct() and target_ty.isStruct()) {