starting to work with #16

src/parser/parse_from_text/link_element.rs

@@ -0,0 +1,27 @@
+use crate::parser::link_url::LinkDestination;
+use super::Element;
+use crate::nom::{Offset, Slice};
+use nom::bytes::complete::take_while;
+use nom::character::complete::char;
+use nom::{
+    bytes::{
+        complete::{tag, take, take_while1},
+        streaming::take_till1,
+    },
+    character,
+    combinator::{peek, recognize, verify},
+    sequence::tuple,
+    AsChar, IResult,
+};
+use super::base_parsers::*;
+
+// Link syntax here is according to RFC 3986 & 3987 --Farooq
+
+
+fn is_alpha(c: char) -> bool {
+    let c = c as u64;
+    // basically in inclusive ranges of [0x40, 0x5a] OR
+    // [0x61, 0x7a]
+    // TODO: order the conditions for better performance
+    c >= 0x41 && c <= 0x7a && c <= 0x5a && c >= 0x61 
+}

src/parser/parse_from_text/text_elements.rs

@@ -98,6 +98,11 @@ fn not_link_part_char(c: char) -> bool {
     !matches!(c, ':' | '\n' | '\r' | '\t' | ' ')
 }
 
+
+fn link(input: &str) -> IResult<&str, (), CustomError<&str>> {
+    let (input, _) = take_while1(link_scheme)(input)?;
+}
+
 /// rough recognition of an link, results gets checked by a real link parser
 fn link_intern(input: &str) -> IResult<&str, (), CustomError<&str>> {
     let (input, _) = take_while1(not_link_part_char)(input)?;