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package regex_parser
/*
(c) Copyright 2024 Feoramund <rune@swevencraft.org>.
Made available under Odin's BSD-3 license.
List of contributors:
Feoramund: Initial implementation.
*/
import "core:io"
write_node :: proc(w: io.Writer, node: Node) {
switch specific in node {
case ^Node_Rune:
io.write_rune(w, specific.data)
case ^Node_Rune_Class:
io.write_byte(w, '[')
if specific.negating {
io.write_byte(w, '^')
}
for r in specific.data.runes {
io.write_rune(w, r)
}
for range in specific.data.ranges {
io.write_rune(w, range.lower)
io.write_byte(w, '-')
io.write_rune(w, range.upper)
}
io.write_byte(w, ']')
case ^Node_Wildcard:
io.write_byte(w, '.')
case ^Node_Concatenation:
io.write_rune(w, '「')
for subnode, i in specific.nodes {
if i != 0 {
io.write_rune(w, '⋅')
}
write_node(w, subnode)
}
io.write_rune(w, '」')
case ^Node_Repeat_Zero:
write_node(w, specific.inner)
io.write_byte(w, '*')
case ^Node_Repeat_Zero_Non_Greedy:
write_node(w, specific.inner)
io.write_string(w, "*?")
case ^Node_Repeat_One:
write_node(w, specific.inner)
io.write_byte(w, '+')
case ^Node_Repeat_One_Non_Greedy:
write_node(w, specific.inner)
io.write_string(w, "+?")
case ^Node_Repeat_N:
write_node(w, specific.inner)
if specific.lower == 0 && specific.upper == -1 {
io.write_byte(w, '*')
} else if specific.lower == 1 && specific.upper == -1 {
io.write_byte(w, '+')
} else {
io.write_byte(w, '{')
io.write_int(w, specific.lower)
io.write_byte(w, ',')
io.write_int(w, specific.upper)
io.write_byte(w, '}')
}
case ^Node_Alternation:
io.write_rune(w, '《')
write_node(w, specific.left)
io.write_byte(w, '|')
write_node(w, specific.right)
io.write_rune(w, '》')
case ^Node_Optional:
io.write_rune(w, '〈')
write_node(w, specific.inner)
io.write_byte(w, '?')
io.write_rune(w, '〉')
case ^Node_Optional_Non_Greedy:
io.write_rune(w, '〈')
write_node(w, specific.inner)
io.write_string(w, "??")
io.write_rune(w, '〉')
case ^Node_Group:
io.write_byte(w, '(')
if !specific.capture {
io.write_string(w, "?:")
}
write_node(w, specific.inner)
io.write_byte(w, ')')
case ^Node_Anchor:
io.write_byte(w, '^' if specific.start else '$')
case ^Node_Word_Boundary:
io.write_string(w, `\B` if specific.non_word else `\b`)
case ^Node_Match_All_And_Escape:
io.write_string(w, "《.*$》")
case nil:
io.write_string(w, "<nil>")
}
}
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