doc: added a note regarding the no_std support

README.md

@@ -203,6 +203,29 @@ mod b {
 This library should always compile with default features on **Rust 1.56.1** 
 or **Rust 1.61** with `const_prec_climber`.
 
+## no_std support
+
+The `pest` and `pest_derive` crates can be built without the Rust standard
+library and target embedded environments. To do so, you need to disable
+their default features. In your `Cargo.toml`, you can specify it as follows:
+
+```toml
+[dependencies]
+# ...
+pest = { version = "2", default-features = false }
+pest_derive = { version = "2", default-features = false }
+```
+
+If you want to build these crates in the pest repository's workspace, you can
+pass the `--no-default-features` flag to `cargo` and specify these crates using
+the `--package` (`-p`) flag. For example:
+
+```bash
+$ cargo build --target thumbv7em-none-eabihf --no-default-features -p pest
+$ cargo bootstrap
+$ cargo build --target thumbv7em-none-eabihf --no-default-features -p pest_derive
+```
+
 ## Special thanks
 
 A special round of applause goes to prof. Marius Minea for his guidance and all

debugger/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_debugger"
 description = "pest grammar debugger"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>", "Tomas Tauber <me@tomtau.be>"]
 homepage = "https://pest.rs/"
@@ -14,9 +14,9 @@ readme = "_README.md"
 rust-version = "1.56"
 
 [dependencies]
-pest = { path = "../pest", version = "2.5.5" }
-pest_meta = { path = "../meta", version = "2.5.5" }
-pest_vm = { path = "../vm", version = "2.5.5" }
+pest = { path = "../pest", version = "2.5.6" }
+pest_meta = { path = "../meta", version = "2.5.6" }
+pest_vm = { path = "../vm", version = "2.5.6" }
 reqwest = { version = "0.11", default-features = false, features = ["blocking", "json", "default-tls"] }
 rustyline = "10"
 serde_json = "1"

derive/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_derive"
 description = "pest's derive macro"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"
@@ -23,5 +23,5 @@ std = ["pest/std", "pest_generator/std"]
 
 [dependencies]
 # for tests, included transitively anyway
-pest = { path = "../pest", version = "2.5.5", default-features = false }
-pest_generator = { path = "../generator", version = "2.5.5", default-features = false }
+pest = { path = "../pest", version = "2.5.6", default-features = false }
+pest_generator = { path = "../generator", version = "2.5.6", default-features = false }

generator/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_generator"
 description = "pest code generator"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"
@@ -18,8 +18,8 @@ default = ["std"]
 std = ["pest/std"]
 
 [dependencies]
-pest = { path = "../pest", version = "2.5.5", default-features = false }
-pest_meta = { path = "../meta", version = "2.5.5" }
+pest = { path = "../pest", version = "2.5.6", default-features = false }
+pest_meta = { path = "../meta", version = "2.5.6" }
 proc-macro2 = "1.0"
 quote = "1.0"
 syn = "1.0"

grammars/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_grammars"
 description = "pest popular grammar implementations"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"
@@ -14,8 +14,8 @@ readme = "_README.md"
 rust-version = "1.56"
 
 [dependencies]
-pest = { path = "../pest", version = "2.5.5" }
-pest_derive = { path = "../derive", version = "2.5.5" }
+pest = { path = "../pest", version = "2.5.6" }
+pest_derive = { path = "../derive", version = "2.5.6" }
 
 [dev-dependencies]
 criterion = "0.3"

meta/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_meta"
 description = "pest meta language parser and validator"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"
@@ -16,7 +16,7 @@ include = ["Cargo.toml", "src/**/*", "src/grammar.rs", "_README.md", "LICENSE-*"
 rust-version = "1.56"
 
 [dependencies]
-pest = { path = "../pest", version = "2.5.5" }
+pest = { path = "../pest", version = "2.5.6" }
 once_cell = "1.8.0"
 
 [build-dependencies]

pest/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest"
 description = "The Elegant Parser"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"

vm/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "pest_vm"
 description = "pest grammar virtual machine"
-version = "2.5.5"
+version = "2.5.6"
 edition = "2021"
 authors = ["Dragoș Tiselice <dragostiselice@gmail.com>"]
 homepage = "https://pest.rs/"
@@ -14,5 +14,5 @@ readme = "_README.md"
 rust-version = "1.56"
 
 [dependencies]
-pest = { path = "../pest", version = "2.5.5" }
-pest_meta = { path = "../meta", version = "2.5.5" }
+pest = { path = "../pest", version = "2.5.6" }
+pest_meta = { path = "../meta", version = "2.5.6" }