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module: support merging module lists

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-05-04 18:08:04 -07:00
parent b37ece1b9a
commit 95c9ae5278
9 changed files with 130 additions and 34 deletions
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11
src/module/query.zig
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@ -37,7 +37,7 @@ pub fn Query(comptime component_types_by_name: anytype) type {
const namespaces = std.meta.fields(Namespace);
var fields: [namespaces.len]std.builtin.Type.UnionField = undefined;
for (namespaces, 0..) |namespace, i| {
const ns = std.meta.stringToEnum(Namespace, namespace.name).?;
const ns = stringToEnum(Namespace, namespace.name).?;
fields[i] = .{
.name = namespace.name,
.type = ComponentList(ns),
@ -61,6 +61,15 @@ pub fn Query(comptime component_types_by_name: anytype) type {
};
}
// TODO: cannot use std.meta.stringToEnum for some reason; an issue with its internal comptime map and u0 values
pub fn stringToEnum(comptime T: type, str: []const u8) ?T {
inline for (@typeInfo(T).Enum.fields) |enumField| {
if (std.mem.eql(u8, str, enumField.name)) {
return @field(T, enumField.name);
}
}
}
test "query" {
const Location = struct {
x: f32 = 0,