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const std = @import("std");
const jv = @import("../jv.zig");
const Ast = @import("./parse.zig").Ast;
pub const Opcode = enum {
nop,
array_index,
literal,
};
pub const Instr = union(Opcode) {
nop,
array_index,
literal: *jv.Value,
pub fn op(self: @This()) Opcode {
return self;
}
};
pub fn compile(allocator: std.mem.Allocator, compile_allocator: std.mem.Allocator, ast: *const Ast) ![]Instr {
var instrs = try std.array_list.Aligned(Instr, null).initCapacity(allocator, 16);
switch (ast.*) {
.identity => try instrs.append(allocator, .nop),
.array_index => |index| {
const index_instrs = try compile(allocator, compile_allocator, index);
defer allocator.free(index_instrs);
try instrs.appendSlice(allocator, index_instrs);
try instrs.append(allocator, .array_index);
},
.literal => |value| try instrs.append(allocator, .{ .literal = value }),
}
return instrs.toOwnedSlice(allocator);
}
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