value_rr.py

Go to the documentation of this file.

# https://pypi.org/project/railroad-diagrams/
# https://jakearchibald.github.io/svgomg/
 
from railroad import *
 
css_rr = """svg.railroad-diagram {
    background-color:hsl(30,20%,95%);
}
svg.railroad-diagram path {
    stroke-width:3;
    stroke:black;
    fill:rgba(0,0,0,0);
}
svg.railroad-diagram text {
    font:bold 14px monospace;
    text-anchor:middle;
}
svg.railroad-diagram text.label{
    text-anchor:start;
}
svg.railroad-diagram text.comment{
    font:italic 12px monospace;
}
svg.railroad-diagram rect{
    stroke-width:3;
    stroke:black;
    fill:hsl(120,100%,90%);
}
svg.railroad-diagram g.non-terminal rect{
    stroke: black;
    fill: white;
)
svg.railroad-diagram rect.group-box {
    stroke: gray;
    stroke-dasharray: 10 5;
    fill: none;
}"""
 
d = Diagram(
  Sequence(
    Choice(0,
      Terminal("'<TEXT>'"), 
      Terminal('"<TEXT>"'),
      Terminal("<NUMBER>"),
      Terminal("true"),
      Terminal("false"),
      Terminal("'<DATETIME>'"),
      Terminal('"<DATETIME>"'),
      Sequence(
        Terminal("["),
        ZeroOrMore( 
          NonTerminal("<VALUE>"), ","
        ),
        Terminal("]")
      ),
      Sequence(
        Terminal("{"),
        ZeroOrMore(
          Sequence(
            Choice(0,
              Terminal("<NAME>"),
              Terminal("'<NAME>'"),
              Terminal('"<NAME>"')
            ),
            Terminal("="), 
            NonTerminal("<VALUE>")
          ), ",",
        ),
        Terminal("}")
      )
    )
  )
)
 
d.writeStandalone(sys.stdout.write, css=css_rr)