diff options
Diffstat (limited to 'src/jq/compile.zig')
| -rw-r--r-- | src/jq/compile.zig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/jq/compile.zig b/src/jq/compile.zig index 54563de..40459c0 100644 --- a/src/jq/compile.zig +++ b/src/jq/compile.zig @@ -5,6 +5,8 @@ const Ast = @import("./parse.zig").Ast; pub const Opcode = enum { nop, ret, + jump, + fork, subexp_begin, subexp_end, array_index, @@ -18,6 +20,8 @@ pub const Instr = union(Opcode) { nop, ret, + jump: usize, + fork: usize, subexp_begin, subexp_end, array_index, @@ -74,6 +78,27 @@ fn compileExpr(allocator: std.mem.Allocator, compile_allocator: std.mem.Allocato try instrs.appendSlice(allocator, lhs_instrs); try instrs.appendSlice(allocator, rhs_instrs); }, + .comma => |comma_expr| { + // FORK l1 + // <lhs> + // JUMP l2 + // l1: <rhs> + // l2: + const lhs_instrs = try compileExpr(allocator, compile_allocator, comma_expr.lhs); + defer allocator.free(lhs_instrs); + const rhs_instrs = try compileExpr(allocator, compile_allocator, comma_expr.rhs); + defer allocator.free(rhs_instrs); + const fork_index = instrs.items.len; + try instrs.append(allocator, .{ .fork = 0 }); + try instrs.appendSlice(allocator, lhs_instrs); + const jump_index = instrs.items.len; + try instrs.append(allocator, .{ .jump = 0 }); + const l1 = instrs.items.len; + try instrs.appendSlice(allocator, rhs_instrs); + const l2 = instrs.items.len; + instrs.items[fork_index] = .{ .fork = l1 - fork_index }; + instrs.items[jump_index] = .{ .jump = l2 - jump_index }; + }, } return instrs.toOwnedSlice(allocator); |