no_std

Add `std` default feature
Only implement for String if `std` is enabled
Replace std Vec with heapless

src/enums.rs

@@ -1,6 +1,8 @@
 #[cfg(test)]
 mod tests;
 
+use heapless::{Vec, consts::U5};
+
 ///The following are the implemented ANSI escape sequences. More to be added.
 #[derive(Debug, PartialEq)]
 pub enum AnsiSequence {
@@ -13,7 +15,7 @@ pub enum AnsiSequence {
     CursorRestore,
     EraseDisplay,
     EraseLine,
-    SetGraphicsMode(Vec<u32>),
+    SetGraphicsMode(Vec<u8, U5>),
     SetMode(u8),
     ResetMode(u8),
     HideCursor,
@@ -54,9 +56,9 @@ pub enum AnsiSequence {
     SetTopAndBottom(u32, u32),
 }
 
-use std::fmt::Display;
+use core::fmt::{Display, Formatter, Result as DisplayResult};
 impl Display for AnsiSequence {
-    fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, formatter: &mut Formatter) -> DisplayResult {
         write!(formatter, "\u{1b}")?;
         
         use AnsiSequence::*;
@@ -179,7 +181,7 @@ pub enum Output<'a> {
 }
 
 impl<'a> Display for Output<'a> {
-    fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+    fn fmt(&self, formatter: &mut Formatter) -> DisplayResult {
         use Output::*;
         match self {
             TextBlock(txt) => write!(formatter, "{}", txt),

src/lib.rs

@@ -1,4 +1,5 @@
 #![recursion_limit="256"]
+#![cfg_attr(not(any(feature = "std", test)), no_std)]
 
 mod enums;
 mod parsers;

src/parsers.rs

@@ -3,7 +3,8 @@ mod tests;
 
 use crate::{AnsiSequence, Output};
 
-use std::convert::TryInto;
+use core::convert::TryInto;
+use heapless::Vec;
 use nom::*;
 
 macro_rules! tag_parser {
@@ -97,7 +98,9 @@ named!(
         tag!("[")       >>
         val: parse_int >>
         tag!("m")      >>
-        (AnsiSequence::SetGraphicsMode(vec![val]))
+        val: expr_res!(val.try_into()) >>
+        conv: expr_res!(Vec::from_slice(&[val])) >>
+        (AnsiSequence::SetGraphicsMode(conv))
     )
 );
 
@@ -109,7 +112,13 @@ named!(
         tag!(";")       >>
         val2: parse_int >>
         tag!("m")       >>
-        (AnsiSequence::SetGraphicsMode(vec![val1, val2]))
+        val1: expr_res!(val1.try_into()) >>
+        val2: expr_res!(val2.try_into()) >>
+        conv: expr_res!(Vec::from_slice(&[
+            val1,
+            val2,
+        ])) >>
+        (AnsiSequence::SetGraphicsMode(conv))
     )
 );
 
@@ -123,7 +132,15 @@ named!(
         tag!(";")       >>
         val3: parse_int >>
         tag!("m")       >>
-        (AnsiSequence::SetGraphicsMode(vec![val1, val2, val3]))
+        val1: expr_res!(val1.try_into()) >>
+        val2: expr_res!(val2.try_into()) >>
+        val3: expr_res!(val3.try_into()) >>
+        conv: expr_res!(Vec::from_slice(&[
+            val1,
+            val2,
+            val3,
+        ])) >>
+        (AnsiSequence::SetGraphicsMode(conv))
     )
 );
 
@@ -131,11 +148,10 @@ named!(
     graphics_mode4<&str, AnsiSequence>,
     do_parse!(
         tag!("[m") >>
-        (AnsiSequence::SetGraphicsMode(vec![]))
+        (AnsiSequence::SetGraphicsMode(Vec::new()))
     )
 );
 
-
 named!(
     graphics_mode5<&str, AnsiSequence>,
     do_parse!(
@@ -150,7 +166,19 @@ named!(
         tag!(";")       >>
         val5: parse_int >>
         tag!("m")       >>
-        (AnsiSequence::SetGraphicsMode(vec![val1, val2, val3, val4, val5]))
+        val1: expr_res!(val1.try_into()) >>
+        val2: expr_res!(val2.try_into()) >>
+        val3: expr_res!(val3.try_into()) >>
+        val4: expr_res!(val4.try_into()) >>
+        val5: expr_res!(val5.try_into()) >>
+        conv: expr_res!(Vec::from_slice(&[
+            val1,
+            val2,
+            val3,
+            val4,
+            val5,
+        ])) >>
+        (AnsiSequence::SetGraphicsMode(conv))
     )
 );
 

src/parsers/tests.rs

@@ -1,5 +1,8 @@
-use super::*;
-use crate::*;
+use crate::{
+    enums::{AnsiSequence, Output},
+    parsers::parse_escape,
+    traits::AnsiParser,
+};
 
 use std::fmt::Write;
 

src/traits.rs

@@ -13,6 +13,7 @@ impl AnsiParser for str {
     }
 }
 
+#[cfg(any(feature = "std", test))]
 impl AnsiParser for String {
     fn ansi_parse(&self) -> AnsiParseIterator<'_> {
         AnsiParseIterator {