implement addition

1 files changed, 21 insertions, 0 deletions

diff --git a/src/jq/compile.zig b/src/jq/compile.zig
index 0c30a3d..e3937c6 100644
--- a/src/jq/compile.zig
+++ b/src/jq/compile.zig
@@ -4,14 +4,20 @@ const Ast = @import("./parse.zig").Ast;
 
 pub const Opcode = enum {
     nop,
+    subexp_begin,
+    subexp_end,
     array_index,
+    add,
     object_key,
     literal,
 };
 
 pub const Instr = union(Opcode) {
     nop,
+    subexp_begin,
+    subexp_end,
     array_index,
+    add,
     object_key: []const u8,
     literal: *jv.Value,
 
@@ -28,11 +34,26 @@ pub fn compile(allocator: std.mem.Allocator, compile_allocator: std.mem.Allocato
         .array_index => |index| {
             const index_instrs = try compile(allocator, compile_allocator, index);
             defer allocator.free(index_instrs);
+            try instrs.append(allocator, .subexp_begin);
             try instrs.appendSlice(allocator, index_instrs);
+            try instrs.append(allocator, .subexp_end);
             try instrs.append(allocator, .array_index);
         },
         .object_key => |key| try instrs.append(allocator, .{ .object_key = key }),
         .literal => |value| try instrs.append(allocator, .{ .literal = value }),
+        .binary_expr => |binary_expr| {
+            const rhs_instrs = try compile(allocator, compile_allocator, binary_expr.rhs);
+            defer allocator.free(rhs_instrs);
+            const lhs_instrs = try compile(allocator, compile_allocator, binary_expr.lhs);
+            defer allocator.free(lhs_instrs);
+            try instrs.append(allocator, .subexp_begin);
+            try instrs.appendSlice(allocator, rhs_instrs);
+            try instrs.append(allocator, .subexp_end);
+            try instrs.append(allocator, .subexp_begin);
+            try instrs.appendSlice(allocator, lhs_instrs);
+            try instrs.append(allocator, .subexp_end);
+            try instrs.append(allocator, .add);
+        },
     }
 
     return instrs.toOwnedSlice(allocator);