1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
// aslip_macro
use crate::data;
use proc_macro::TokenStream;
use quote::quote;
extern crate proc_macro;
pub fn run_impl(input: TokenStream) -> TokenStream {
let arms: Vec<syn::Arm> = {
let store = data::COMMANDS.lock().expect(concat!(file!(), ":", line!()));
let mut re: Vec<syn::Arm> = vec![];
for (_key, fn_info) in store.iter() {
{
let code = fn_info.gen_case_code();
let a = syn::parse_str::<syn::Arm>(&code).expect(
&("解析 syn::Arm 时出错：".to_string() + concat!(":", file!(), ":", line!())),
);
re.push(a);
}
{
let code = fn_info.gen_short_name_case_code();
if !code.is_empty() {
let a = syn::parse_str::<syn::Arm>(&code).expect(
&("解析 syn::Arm 时出错：".to_string()
+ &code
+ concat!(":", file!(), ":", line!())),
);
re.push(a);
}
}
}
re
};
let app = gen_app_var(input);
// 生成新的代码
let expanded_tokens = quote! {
'block: {
use aslip::types::*;
use aslip::app::App;
#app
match &app._user_inputed_cmd_name {
None => {
app.print_app_help();
}
Some(cmd_name) => {
// 查看 命令 的 quick help。
// app cmd -h
// app cmd --help
if let Some(first_arg) = app._user_inputed_cmd_args.first() {
if first_arg == "-h" || first_arg == "--help" {
app.print_cmd_quick_help_for(cmd_name);
break 'block;
}
};
match cmd_name.as_str() {
"" => {app.print_app_help();},
#(#arms)*
x => {
match x {
"help" => {
if let Some(first_arg) = app._user_inputed_cmd_args.first() {
app.print_cmd_quick_help_for(first_arg);
break 'block;
}else {
app.print_app_help();
};
}
"-h" | "--help" => {
app.print_app_help();
}
"-v" | "--version" | "version" => {
app.print_app_version();
}
v => {
::aslip::tools::color_print::cprintln!("<red,bold>error:</> no such command: <cyan>{:?}</>", v);
}
}
},
};
}
}
};
};
TokenStream::from(expanded_tokens)
}
/// &mut app
#[derive(Clone)]
struct BarrowMutIdent {
app_iden: syn::Ident,
}
impl syn::parse::Parse for BarrowMutIdent {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
let _: syn::Token![&] = input.parse()?;
let _: syn::Token![mut] = input.parse()?;
let app_iden: syn::Ident = input.parse()?;
Ok(Self { app_iden: app_iden })
}
}
/// ()
#[derive(Clone)]
struct EmptyIden {}
impl syn::parse::Parse for EmptyIden {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
let _ = input;
Ok(Self {})
}
}
fn gen_app_var(input: TokenStream) -> proc_macro2::TokenStream {
let barrow_mut_ident_result: syn::Result<BarrowMutIdent> =
syn::parse::<BarrowMutIdent>(input.clone());
if let Err(ref _e) = barrow_mut_ident_result {
// 有求 要么 &mut app, 要么 ()
let _ = syn::parse::<EmptyIden>(input).expect("提示：&mut app");
}
let store = data::COMMANDS.lock().expect(concat!(file!(), line!()));
let mut app_cmds_init: proc_macro2::TokenStream = quote! {};
for (_key, fn_info) in store.iter() {
let code = fn_info.gen_push_to_app_command_list();
app_cmds_init = quote! {
#app_cmds_init
#code
};
}
return match barrow_mut_ident_result {
Ok(app_ident) => {
let ident = app_ident.app_iden;
// 用户自己定义了一个 aslip::app::App, 则使用用户定义的 aslip::app::App.
quote! {
let app: &mut App = &mut #ident;
#app_cmds_init
}
}
Err(_e) => {
// 用户没有传入，则使用默认实现。
quote! {
let mut app = ::aslip::app::App::new();
#app_cmds_init
}
}
};
}