[librsvg] parse_transform.rs: Start a lalrpop parser for the "transform" attribute

From: Federico Mena Quintero <federico src gnome org>
To: commits-list gnome org
Cc:
Subject: [librsvg] parse_transform.rs: Start a lalrpop parser for the "transform" attribute
Date: Wed, 22 Mar 2017 17:59:34 +0000 (UTC)
commit 121cdb556b53b6b807aa58afca62b9eef7564b09
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Mar 21 20:40:42 2017 -0600

    parse_transform.rs: Start a lalrpop parser for the "transform" attribute

 rust/Cargo.lock                  |  321 ++++++++++++++++++++++++++++++++++++++
 rust/Cargo.toml                  |   10 ++
 rust/src/lib.rs                  |    1 +
 rust/src/parse_transform.lalrpop |    7 +
 rust/src/parsers.rs              |   24 +++
 5 files changed, 363 insertions(+), 0 deletions(-)
---
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index ef615c8..2b32a3a 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -7,11 +7,53 @@ dependencies = [
  "cairo-sys-rs 0.3.2 (git+https://github.com/gtk-rs/cairo.git)",
  "downcast-rs 1.0.0 (git+https://github.com/marcianx/downcast-rs)",
  "glib 0.1.1 (git+https://github.com/gtk-rs/glib)",
+ "lalrpop 0.12.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lalrpop-util 0.12.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "nom 2.1.0 (git+https://github.com/federicomenaquintero/nom.git)",
+ "regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
+name = "aho-corasick"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atty"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bit-set"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "bit-vec 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+
+[[package]]
 name = "bitflags"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index";
@@ -54,11 +96,32 @@ dependencies = [
 ]
 
 [[package]]
+name = "diff"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+
+[[package]]
+name = "docopt"
+version = "0.6.86"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "lazy_static 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "downcast-rs"
 version = "1.0.0"
 source = "git+https://github.com/marcianx/downcast-rs#5ace99daf704b91f2eeab366b67b78b368d51884";
 
 [[package]]
+name = "fixedbitset"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+
+[[package]]
 name = "glib"
 version = "0.1.1"
 source = "git+https://github.com/gtk-rs/glib#91f2ceb47cdc2d3b209ce3b6c96e3de928223842";
@@ -91,37 +154,295 @@ dependencies = [
 ]
 
 [[package]]
+name = "itertools"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+ "bitflags 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "diff 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "docopt 0.6.86 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itertools 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lalrpop-intern 0.12.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lalrpop-snap 0.12.5 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "petgraph 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "term 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
+name = "lalrpop-util"
+version = "0.12.5"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+
+[[package]]
+name = "lazy_static"
+version = "0.2.4"
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+
+[[package]]
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 version = "0.2.20"
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+name = "memchr"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index";
+dependencies = [
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 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = 
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+"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = 
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diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 25eb419..5e9d2ff 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -2,6 +2,7 @@
 name = "rsvg_internals"
 version = "0.0.1"
 authors = ["Federico Mena Quintero <federico gnome org>"]
+build = "build.rs"
 
 [dependencies]
 libc = "0.2"
@@ -32,6 +33,15 @@ features = ["verbose-errors"]
 git = "https://github.com/marcianx/downcast-rs";
 version = "1.0.0"
 
+[dependencies.regex]
+version = "0.2.1"
+
+[dependencies.lalrpop-util]
+version = "0.12.5"
+
+[build-dependencies.lalrpop]
+version = "0.12.5"
+
 [lib]
 name = "rsvg_internals"
 crate-type = ["staticlib"]
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index 7ae50cb..1a04315 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -114,6 +114,7 @@ mod marker;
 mod node;
 mod paint_server;
 mod parsers;
+mod parse_transform;
 mod path_builder;
 mod path_parser;
 mod pattern;
diff --git a/rust/src/parse_transform.lalrpop b/rust/src/parse_transform.lalrpop
new file mode 100644
index 0000000..655ba68
--- /dev/null
+++ b/rust/src/parse_transform.lalrpop
@@ -0,0 +1,7 @@
+//-*- rust -*-
+
+use std::str::FromStr;
+
+grammar;
+
+pub Num: f64 = <s:r"[+-]?([0-9]*\.[0-9]+|[0-9]+(\.[0-9]*)?)([Ee][+-]?[0-9]+)?"> => f64::from_str (s).unwrap 
();
diff --git a/rust/src/parsers.rs b/rust/src/parsers.rs
index c5cc979..7253d85 100644
--- a/rust/src/parsers.rs
+++ b/rust/src/parsers.rs
@@ -2,6 +2,8 @@ use nom::{IResult, double, is_alphabetic};
 use std::str;
 use std::f64::consts::*;
 
+use parse_transform::*;
+
 // I don't know how to copy a nom::IError for long-term storage
 // (i.e. when it can no longer reference the &[u8]).  So, we explode a
 // nom::IError into a simple error struct that can be passed around.
@@ -263,3 +265,25 @@ mod tests {
         assert! (angle_degrees ("300foo").is_err ());
     }
 }
+
+#[cfg(test)]
+mod parse_transform_tests {
+    #[test]
+    fn parses_numbers () {
+        assert_eq! (parse_Num ("0"),          Ok (0.0));
+        assert_eq! (parse_Num ("12345"),      Ok (12345.0));
+        assert_eq! (parse_Num ("-123"),       Ok (-123.0));
+        assert_eq! (parse_Num ("-123.25"),    Ok (-123.25));
+        assert_eq! (parse_Num ("123.25"),     Ok (123.25));
+        assert_eq! (parse_Num ("-.25"),       Ok (-0.25));
+        assert_eq! (parse_Num (".25"),        Ok (0.25));
+        assert_eq! (parse_Num ("-25."),       Ok (-25.0));
+        assert_eq! (parse_Num ("25."),        Ok (25.0));
+        assert_eq! (parse_Num ("22.5e1"),     Ok (225.0));
+        assert_eq! (parse_Num ("-22.5e1"),    Ok (-225.0));
+        assert_eq! (parse_Num ("-123.45e2"),  Ok (-12345.0));
+        assert_eq! (parse_Num ("123.45E2"),   Ok (12345.0));
+        assert_eq! (parse_Num ("-123.25e-2"), Ok (-1.2325));
+        assert_eq! (parse_Num ("123.25E-2"),  Ok (1.2325));
+    }
+}
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