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Sema: restore the extern lib name functionality

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This commit is contained in:
Andrew Kelley
2021-05-04 14:40:59 -07:00
parent 1f0fd64302
commit 7a27f0d80c
3 changed files with 90 additions and 133 deletions
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36
src/Module.zig
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@@ -1603,6 +1603,34 @@ pub const SrcLoc = struct {
const token_starts = tree.tokens.items(.start);
return token_starts[tok_index];
},
.node_offset_lib_name => |node_off| {
const tree = try src_loc.file_scope.getTree(gpa);
const node_datas = tree.nodes.items(.data);
const node_tags = tree.nodes.items(.tag);
const parent_node = src_loc.declRelativeToNodeIndex(node_off);
var params: [1]ast.Node.Index = undefined;
const full = switch (node_tags[parent_node]) {
.fn_proto_simple => tree.fnProtoSimple(&params, parent_node),
.fn_proto_multi => tree.fnProtoMulti(parent_node),
.fn_proto_one => tree.fnProtoOne(&params, parent_node),
.fn_proto => tree.fnProto(parent_node),
.fn_decl => blk: {
const fn_proto = node_datas[parent_node].lhs;
break :blk switch (node_tags[fn_proto]) {
.fn_proto_simple => tree.fnProtoSimple(&params, fn_proto),
.fn_proto_multi => tree.fnProtoMulti(fn_proto),
.fn_proto_one => tree.fnProtoOne(&params, fn_proto),
.fn_proto => tree.fnProto(fn_proto),
else => unreachable,
};
},
else => unreachable,
};
const tok_index = full.lib_name.?;
const token_starts = tree.tokens.items(.start);
return token_starts[tok_index];
},
}
}
};
@@ -1768,6 +1796,12 @@ pub const LazySrcLoc = union(enum) {
/// to the type expression.
/// The Decl is determined contextually.
node_offset_anyframe_type: i32,
/// The source location points to the string literal of `extern "foo"`, found
/// by taking this AST node index offset from the containing
/// Decl AST node, which points to a function prototype or variable declaration
/// expression AST node. Next, navigate to the string literal of the `extern "foo"`.
/// The Decl is determined contextually.
node_offset_lib_name: i32,
/// Upgrade to a `SrcLoc` based on the `Decl` or file in the provided scope.
pub fn toSrcLoc(lazy: LazySrcLoc, scope: *Scope) SrcLoc {
@@ -1808,6 +1842,7 @@ pub const LazySrcLoc = union(enum) {
.node_offset_fn_type_cc,
.node_offset_fn_type_ret_ty,
.node_offset_anyframe_type,
.node_offset_lib_name,
=> .{
.file_scope = scope.getFileScope(),
.parent_decl_node = scope.srcDecl().?.src_node,
@@ -1855,6 +1890,7 @@ pub const LazySrcLoc = union(enum) {
.node_offset_fn_type_cc,
.node_offset_fn_type_ret_ty,
.node_offset_anyframe_type,
.node_offset_lib_name,
=> .{
.file_scope = decl.getFileScope(),
.parent_decl_node = decl.src_node,