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fix(MultipleValues): properly distinguishes between multiple values and multiple occurrences

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When using number_of_values() or value_names() you no longer have to set
.multiple(true) unless you want the argument to be allowed multiple
times (i.e. *not* the value, but the argument itself). This means
without multiple(true) set (and assuming 2 values) -o val1 val2 is only
allowed one time, but with multiple(true) set, -o val1 val2 -o val3 val4
is allowed.

Closes #99
This commit is contained in:
Kevin K 2015-05-04 20:22:57 -04:00
parent 4a23f1b484
commit dd2a75640c
2 changed files with 80 additions and 36 deletions
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43
src/app.rs
View file

@ -315,7 +315,11 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
max_vals: a.max_vals,
help: a.help,
};
if pb.num_vals.unwrap_or(0) > 1 && !pb.multiple {
if pb.min_vals.is_some() && !pb.multiple {
panic!("Argument \"{}\" does not allow multiple values, yet it is expecting {} \
values", pb.name, pb.num_vals.unwrap());
}
if pb.max_vals.is_some() && !pb.multiple {
panic!("Argument \"{}\" does not allow multiple values, yet it is expecting {} \
values", pb.name, pb.num_vals.unwrap());
}
@ -371,7 +375,11 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
if let Some(ref vec) = ob.val_names {
ob.num_vals = Some(vec.len() as u8);
}
if ob.num_vals.unwrap_or(0) > 1 && !ob.multiple {
if ob.min_vals.is_some() && !ob.multiple {
panic!("Argument \"{}\" does not allow multiple values, yet it is expecting {} \
values", ob.name, ob.num_vals.unwrap());
}
if ob.max_vals.is_some() && !ob.multiple {
panic!("Argument \"{}\" does not allow multiple values, yet it is expecting {} \
values", ob.name, ob.num_vals.unwrap());
}
@ -1203,7 +1211,7 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
if let Some(num) = opt.num_vals {
if let Some(ref ma) = matches.args.get(opt.name) {
if let Some(ref vals) = ma.values {
if num == vals.len() as u8 {
if num == vals.len() as u8 && !opt.multiple {
self.report_error(format!("The argument \"{}\" was found, \
but '{}' only expects {} values",
arg,
@ -1741,7 +1749,7 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
}
// Shouldn't reach here
self.report_error(format!("Argument --{} isn't valid", arg),
self.report_error(format!("The argument --{} isn't valid", arg),
true,
true,
Some(matches.args.keys().map(|k| *k).collect::<Vec<_>>()));
@ -1757,7 +1765,7 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
for c in arg.chars() {
self.check_for_help_and_version(c);
if !self.parse_single_short_flag(matches, c) {
self.report_error(format!("Argument -{} isn't valid",arg),
self.report_error(format!("The argument -{} isn't valid",arg),
true,
true,
Some(matches.args.keys().map(|k| *k).collect::<Vec<_>>()));
@ -1795,8 +1803,8 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
if matches.args.contains_key(v.name) {
if !v.multiple {
self.report_error(format!("Argument -{} was supplied more than once, but does \
not support multiple values", arg),
self.report_error(format!("The argument -{} was supplied more than once, but \
does not support multiple values", arg),
true,
true,
Some(matches.args.keys().map(|k| *k).collect::<Vec<_>>()));
@ -1834,7 +1842,7 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
}
// Didn't match a flag or option, must be invalid
self.report_error( format!("Argument -{} isn't valid",arg_c),
self.report_error( format!("The argument -{} isn't valid",arg_c),
true,
true,
Some(matches.args.keys().map(|k| *k).collect::<Vec<_>>()));
@ -1863,7 +1871,7 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
// Make sure this isn't one being added multiple times if it doesn't suppor it
if matches.args.contains_key(v.name) && !v.multiple {
self.report_error(format!("Argument -{} was supplied more than once, but does \
self.report_error(format!("The argument -{} was supplied more than once, but does \
not support multiple values", arg),
true,
true,
@ -1961,13 +1969,24 @@ impl<'a, 'v, 'ab, 'u, 'h, 'ar> App<'a, 'v, 'ab, 'u, 'h, 'ar>{
if let Some(ref vals) = ma.values {
if let Some(f) = self.opts.get(name) {
if let Some(num) = f.num_vals {
if num != vals.len() as u8 {
let should_err = if f.multiple {
((vals.len() as u8) % num) != 0
} else {
num != (vals.len() as u8)
};
if should_err {
self.report_error(format!("The argument '{}' requires {} values, \
but {} w{} provided",
f,
num,
vals.len(),
if vals.len() == 1 {"as"}else{"ere"}),
if f.multiple {
vals.len() % num as usize
} else {
vals.len()
},
if vals.len() == 1 ||
( f.multiple &&
( vals.len() % num as usize) == 1) {"as"}else{"ere"}),
true,
true,
Some(matches.args.keys().map(|k| *k).collect::<Vec<_>>()));

35
src/args/arg.rs
View file

@ -654,9 +654,11 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// `.number_of_values(3)`, and this argument wouldn't be satisfied unless the user provided
/// 3 and only 3 values.
///
/// **NOTE:** The argument *must* have `.multiple(true)` or `...` to use this setting. Which
/// implies that `qty` must be > 1 (i.e. setting `.number_of_values(1)` would be unnecessary)
/// **NOTE:** `qty` must be > 1
///
/// **NOTE:** Does *not* require `.multiple(true)` to be set. Setting `.multiple(true)` would
/// allow `-f <file> <file> <file> -f <file> <file> <file>` where as *not* setting
/// `.multiple(true)` would only allow one occurrence of this argument.
///
/// # Example
///
@ -668,6 +670,11 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// .number_of_values(3)
/// # ).get_matches();
pub fn number_of_values(mut self, qty: u8) -> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
if qty < 2 {
panic!("Arguments with number_of_values(qty) qty must be > 1. Prefer \
takes_value(true) for arguments with onyl one value, or flags for arguments \
with 0 values.");
}
self.num_vals = Some(qty);
self
}
@ -677,8 +684,9 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// `.max_values(3)`, and this argument would be satisfied if the user provided, 1, 2, or 3
/// values.
///
/// **NOTE:** The argument *must* have `.multiple(true)` or `...` to use this setting. Which
/// implies that `qty` must be > 1 (i.e. setting `.max_values(1)` would be unnecessary)
/// **NOTE:** `qty` must be > 1
///
/// **NOTE:** This implicity sets `.multiple(true)`
///
/// # Example
///
@ -690,7 +698,13 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// .max_values(3)
/// # ).get_matches();
pub fn max_values(mut self, qty: u8) -> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
if qty < 2 {
panic!("Arguments with max_values(qty) qty must be > 1. Prefer \
takes_value(true) for arguments with onyl one value, or flags for arguments \
with 0 values.");
}
self.max_vals = Some(qty);
self.multiple = true;
self
}
@ -699,7 +713,9 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// `.min_values(2)`, and this argument would be satisfied if the user provided, 2 or more
/// values.
///
/// **NOTE:** The argument *must* have `.multiple(true)` or `...` to use this setting.
/// **NOTE:** This implicity sets `.multiple(true)`
///
/// **NOTE:** `qty` must be > 0
///
/// **NOTE:** `qty` *must* be > 0. If you wish to have an argument with 0 or more values prefer
/// two seperate arguments (a flag, and an option with multiple values).
@ -714,7 +730,12 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// .min_values(2)
/// # ).get_matches();
pub fn min_values(mut self, qty: u8) -> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
if qty < 1 {
panic!("Arguments with min_values(qty) qty must be > 0. Prefer flags for arguments \
with 0 values.");
}
self.min_vals = Some(qty);
self.multiple = true;
self
}
@ -727,6 +748,10 @@ impl<'n, 'l, 'h, 'g, 'p, 'r> Arg<'n, 'l, 'h, 'g, 'p, 'r> {
/// be aware that the number of "names" you set for the values, will be the *exact* number of
/// values required to satisfy this argument
///
/// **NOTE:** Does *not* require `.multiple(true)` to be set. Setting `.multiple(true)` would
/// allow `-f <file> <file> <file> -f <file> <file> <file>` where as *not* setting
/// `.multiple(true)` would only allow one occurrence of this argument.
///
/// # Example
///
/// ```no_run