add main command struct and make fillKeywords mostly-comptime

src/lang.zig

@@ -51,6 +51,37 @@ pub const CommandType = enum {
     Rotate,
 };
 
+pub const Type = enum {
+    /// "LV2 Commands" are commands that receive split, index, and then receive
+    /// any f64 arguments.
+    lv2_command,
+};
+
+pub const NewCommand = struct {
+    pub const Noop = struct {};
+
+    pub const Load = struct {
+        path: []const u8,
+    };
+
+    pub const Quicksave = struct {};
+
+    pub const RunQS = struct {
+        program: []const u8,
+    };
+
+    pub const Amp = struct {
+        pub const base_type = Type.lv2_command;
+        gain: f64
+    };
+
+    pub const RFlanger = struct {
+        pub const base_type = Type.lv2_command;
+        delay_depth_avg: f64,
+        law_freq: f64,
+    };
+};
+
 pub const Command = struct {
     command: CommandType,
     args: ArgList,
@@ -182,48 +213,18 @@ pub const Lang = struct {
     }
 
     fn fillKeywords(self: *Lang) !void {
-        _ = try self.keywords.put("noop", .Noop);
-        _ = try self.keywords.put("load", .Load);
-        _ = try self.keywords.put("quicksave", .Quicksave);
-        _ = try self.keywords.put("runqs", .RunQS);
+        inline for (@typeInfo(NewCommand).Struct.decls) |cmd_struct_decl| {
+            const struct_name = cmd_struct_decl.name;
 
-        _ = try self.keywords.put("amp", .Amp);
-        _ = try self.keywords.put("rflanger", .RFlanger);
-        _ = try self.keywords.put("eq", .Eq);
-        _ = try self.keywords.put("mbeq", .Mbeq);
-        _ = try self.keywords.put("phaser", .Phaser);
-        _ = try self.keywords.put("chorus", .Chorus);
-        _ = try self.keywords.put("pitchscaler", .PitchScaler);
-        _ = try self.keywords.put("reverb", .Reverb);
-        _ = try self.keywords.put("highpass", .Highpass);
-        _ = try self.keywords.put("delay", .Delay);
-        _ = try self.keywords.put("vinyl", .Vinyl);
-        _ = try self.keywords.put("revdelay", .RevDelay);
-        _ = try self.keywords.put("gate", .Gate);
-        _ = try self.keywords.put("detune", .Detune);
-        _ = try self.keywords.put("overdrive", .Overdrive);
-        _ = try self.keywords.put("talkbox", .TalkBox);
-        _ = try self.keywords.put("thruzero", .ThruZero);
-        _ = try self.keywords.put("foverdrive", .Foverdrive);
-        _ = try self.keywords.put("gverb", .Gverb);
-        _ = try self.keywords.put("invert", .Invert);
-        _ = try self.keywords.put("tapedelay", .TapeDelay);
-        _ = try self.keywords.put("moddelay", .ModDelay);
-        _ = try self.keywords.put("multichorus", .MultiChorus);
-        _ = try self.keywords.put("saturator", .Saturator);
-        _ = try self.keywords.put("vintagedelay", .VintageDelay);
+            comptime var lowered_command_name = [_]u8{0} ** struct_name.len;
+            comptime {
+                for (struct_name) |c, i| {
+                    lowered_command_name[i] = std.ascii.toLower(c);
+                }
+            }
 
-        // custom implementations (not lv2)
-        _ = try self.keywords.put("noise", .Noise);
-        _ = try self.keywords.put("wildnoise", .WildNoise);
-        _ = try self.keywords.put("write", .Write);
-        _ = try self.keywords.put("embed", .Embed);
-        _ = try self.keywords.put("degrade", .Degrade);
-        _ = try self.keywords.put("repsycho", .RePsycho);
-        _ = try self.keywords.put("dyncomp", .RePsycho);
-
-        // even more custom
-        _ = try self.keywords.put("rotate", .Rotate);
+            _ = try self.keywords.put(&lowered_command_name, @field(CommandType, struct_name));
+        }
     }
 
     pub fn getCommand(self: *Lang, stmt: []const u8) ?CommandType {