use std::fs;
use std::io::Write;
fn main() {
use railroad::*;
let mut f = fs::File::create("examples/visuals.html").unwrap();
macro_rules! hr {
() => {
f.write_all(b"
").unwrap();
};
}
macro_rules! raw_dia {
($r:expr) => {
let dia = Diagram::with_default_css($r);
writeln!(f, "{}
", dia.width(), dia).unwrap();
};
}
macro_rules! dia {
($r:expr) => {
raw_dia!(seq!(SimpleStart, $r, SimpleEnd));
};
}
macro_rules! nonterm {
($r:expr) => {
NonTerminal::new($r.to_owned())
};
}
macro_rules! term {
($r:expr) => {
Terminal::new($r.to_owned())
};
}
macro_rules! seq { ($($r: expr),*) => { Sequence::>::new(vec![ $( Box::new($r), )+ ]) } }
macro_rules! choice { ($($r: expr),*) => { Choice::>::new(vec![ $( Box::new($r), )* ]) } }
macro_rules! stck { ($($r: expr),*) => { Stack::>::new(vec![ $( Box::new($r), )* ]) } }
macro_rules! cmt {
($r:expr) => {
Comment::new($r.to_owned())
};
}
macro_rules! vert { ($($r: expr),*) => { VerticalGrid::new(vec![ $( Box::new($r) as Box, )+ ]) } }
macro_rules! horiz { ($($r: expr),*) => { HorizontalGrid::new(vec![ $( Box::new($r) as Box, )+ ]) } }
macro_rules! lnk {
($r:expr) => {
Link::new($r, "https://www.rust-lang.org".to_owned())
};
}
macro_rules! rpt {
($r:expr, $s:expr) => {
Repeat::new($r, $s)
};
($r:expr) => {
rpt!($r, Empty)
};
}
macro_rules! dbg {
($eh:expr, $h:expr, $w:expr) => {
Debug::new($eh, $h, $w)
};
() => {
dbg!(20, 30, 50)
};
}
macro_rules! opt {
($r:expr) => {
Optional::new($r)
};
}
macro_rules! lbox {
($r:expr, $u:expr) => {
LabeledBox::new($r, $u)
};
($r:expr) => {
LabeledBox::new($r, Empty)
};
}
f.write_all(b"").unwrap();
f.write_all(
br#"
Railroad diagram examples
"#,
)
.unwrap();
// Very simple
dia!(nonterm!("Foo"));
dia!(lbox!(nonterm!("Foo")));
dia!(lbox!(nonterm!("Foo"), cmt!("Read the docs regarding foo!")));
hr!();
// Very simple, varying size
dia!(dbg!());
dia!(dbg!(20, 50, 50));
hr!();
// Long text, difficult width
dia!(nonterm!(
"This is a very long text that should not escape it's bounding box, like ever..."
));
dia!(term!(
"This is a very long text that should not escape it's bounding box, like ever..."
));
dia!(cmt!(
"This is a very long text that should not escape it's bounding box, like ever..."
));
dia!(term!("大家好"));
dia!(cmt!("ｆｏｏｂａｒ"));
dia!(lbox!(
nonterm!("大家好 🤸"),
cmt!("ｆｏｏｂａｒｆｏｏｂａｒｆｏｏｂａｒ")
));
hr!();
// Optional
dia!(opt!(dbg!(0, 20, 10)));
dia!(opt!(dbg!(25, 45, 20)));
dia!(opt!(dbg!(30, 50, 50)));
hr!();
// Sequences of varying size
dia!(seq!(dbg!(20, 30, 10), dbg!(30, 50, 70)));
dia!(seq!(dbg!(20, 30, 10), dbg!(20, 50, 50), dbg!(30, 50, 70)));
hr!();
// Choices
dia!(choice!());
dia!(choice!(Empty));
dia!(choice!(Empty, Empty));
dia!(choice!(Empty, dbg!(5, 25, 10)));
dia!(choice!(dbg!(15, 40, 10), dbg!(25, 30, 20)));
dia!(choice!(
dbg!(10, 15, 10),
dbg!(10, 15, 5),
dbg!(20, 35, 22),
dbg!(10, 15, 10)
));
dia!(choice!(Empty, dbg!(5, 20, 10), dbg!(25, 35, 5)));
hr!();
// Vertical grid
raw_dia!(vert!(
seq!(SimpleStart, term!("42"), SimpleEnd),
cmt!("This is the answer")
));
raw_dia!(vert!(
seq!(SimpleStart, dbg!(15, 40, 10), SimpleEnd),
seq!(Start, dbg!(25, 35, 5), End)
));
hr!();
// Horizontal grid
raw_dia!(horiz!(
seq!(SimpleStart, term!("42"), SimpleEnd),
cmt!("This is the answer")
));
raw_dia!(horiz!(
seq!(SimpleStart, dbg!(15, 40, 10), SimpleEnd),
seq!(Start, dbg!(25, 35, 5), End)
));
hr!();
// LabeledBox
dia!(lbox!(term!("Foo"), term!("Bar!")));
dia!(choice!(
lbox!(Empty, cmt!("Do nothing")),
lbox!(term!("bar"), cmt!("Do something"))
));
hr!();
// Repeats
dia!(rpt!(Empty, Empty));
dia!(rpt!(dbg!(20, 30, 10), dbg!(30, 50, 20)));
dia!(rpt!(dbg!(5, 15, 10), dbg!(5, 15, 20)));
dia!(rpt!(nonterm!("Foo"), term!(",")));
dia!(rpt!(
cmt!("<-- this is longer -->"),
cmt!("this is shorter")
));
dia!(rpt!(
nonterm!("Foo"),
lbox!(term!(","), cmt!("A comment that runs long"))
));
dia!(rpt!(
cmt!("this is shorter"),
cmt!("<-- this is longer -->")
));
hr!();
// Stacks
dia!(stck!());
dia!(stck!(Empty));
dia!(stck!(Empty, Empty));
dia!(stck!(Empty, dbg!(5, 25, 10)));
dia!(stck!(dbg!(15, 40, 10), dbg!(25, 30, 20)));
dia!(stck!(
dbg!(10, 15, 10),
dbg!(10, 15, 5),
seq!(dbg!(), dbg!(20, 35, 22)),
dbg!(10, 15, 10)
));
hr!();
// Links
dia!(lnk!(term!("www.rust-lang.org")));
dia!({
let mut l = lnk!(term!("www.rust-lang.org"));
l.set_target(Some(LinkTarget::Blank));
l
});
hr!();
dia!(choice!(
rpt!(
seq!(
choice!(
term!("Foo"),
seq!(opt!(term!("BarNoodle")), term!("NoodleBox"), term!("foo")),
term!("More"),
term!("42")
),
stck!(
nonterm!("Stack1"),
opt!(nonterm!("Stack2")),
nonterm!("Stack2"),
opt!(nonterm!("Stack4"))
)
),
term!(",")
),
rpt!(term!("x"), cmt!("1-6 times"))
));
hr!();
dia!(stck!(
seq!(
term!("ALTER"),
term!("TABLE"),
opt!(seq!(term!("schema-name"), term!("."))),
term!("table-name")
),
lbox!(
choice!(
lbox!(
seq!(term!("RENAME"), term!("TO"), term!("new-table-name")),
cmt!("Wow")
),
seq!(term!("ADD"), opt!(term!("COLUMN")), nonterm!("column-def"))
),
cmt!("Foo")
)
));
hr!();
dia!(opt!(choice!(
seq!(term!("ON"), nonterm!("expr")),
seq!(
term!("USING"),
term!("("),
rpt!(term!("column-name"), term!(",")),
term!(")")
)
)));
hr!();
dia!(seq!(
nonterm!("$i:expr"),
term!(","),
choice!(
seq!(
nonterm!("$submac:ident"),
term!("!("),
opt!(rpt!(nonterm!("$args:tt"), Empty)),
term!(")")
),
nonterm!("$f:expr")
)
));
hr!();
dia!(choice!(
cmt!("Macro-internal"),
seq!(
nonterm!("$i:expr"),
term!(","),
choice!(
seq!(
nonterm!("$submac:ident"),
term!("!"),
lbox!(seq!(
term!("("),
opt!(rpt!(nonterm!("$args:tt"))),
term!(")")
)),
term!(",")
),
nonterm!("$f:expr")
),
nonterm!("$g:expr")
)
));
hr!();
f.write_all(b"").unwrap();
}