moving to function objects, work started on boashell other bug fixes

Cargo.lock

@@ -4,12 +4,11 @@
 name = "Boa"
 version = "0.3.0"
 dependencies = [
- "chrono 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "criterion 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gc 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "gc_derive 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -24,7 +23,7 @@ dependencies = [
 
 [[package]]
 name = "arrayvec"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -32,17 +31,16 @@ dependencies = [
 
 [[package]]
 name = "atty"
-version = "0.2.11"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "autocfg"
-version = "0.1.4"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -52,18 +50,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bstr"
-version = "0.2.1"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-automata 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-automata 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bumpalo"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -76,7 +74,7 @@ name = "c2-chacha"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -90,19 +88,6 @@ name = "cfg-if"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "chrono"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "js-sys 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasm-bindgen 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "clap"
 version = "2.33.0"
@@ -110,7 +95,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -118,23 +103,23 @@ name = "criterion"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "criterion-plot 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "csv 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_os 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xoshiro 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "tinytemplate 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -148,24 +133,24 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.6.3"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-epoch 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -173,16 +158,16 @@ name = "crossbeam-queue"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -190,11 +175,11 @@ name = "csv"
 version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bstr 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bstr 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "csv-core 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -227,11 +212,12 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.1.6"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -247,30 +233,19 @@ name = "itoa"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "js-sys"
-version = "0.3.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "wasm-bindgen 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "lazy_static"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "libc"
-version = "0.2.59"
+version = "0.2.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "log"
-version = "0.4.6"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -281,34 +256,28 @@ name = "memchr"
 version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "memoffset"
-version = "0.2.1"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "nodrop"
 version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "num-integer"
-version = "0.1.41"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -316,14 +285,9 @@ name = "num_cpus"
 version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "numtoa"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.5"
@@ -331,15 +295,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.30"
+version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -350,20 +306,12 @@ name = "quote"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "quote"
-version = "0.6.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -371,29 +319,28 @@ name = "rand"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -401,7 +348,7 @@ name = "rand_hc"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -409,8 +356,8 @@ name = "rand_os"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -418,47 +365,34 @@ name = "rand_xoshiro"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon"
-version = "1.1.0"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-deque 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon-core 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon-core"
-version = "1.5.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-deque 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-queue 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.1.56"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "redox_termios"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "regex"
-version = "1.3.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -469,7 +403,7 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -480,6 +414,14 @@ name = "regex-syntax"
 version = "0.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.0"
@@ -487,7 +429,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "same-file"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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-version = "0.3.3"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
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 [[package]]
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-version = "1.0.94"
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
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  "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.100 (registry+https://github.com/rust-lang/crates.io-index)",
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- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
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- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
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Cargo.toml

@@ -9,6 +9,7 @@ keywords = ["javascript", "compiler", "lexer", "parser", "js"]
 license = "Unlicense/MIT"
 exclude = [".vscode/*", "Dockerfile", "Makefile", ".editorConfig"]
 edition = "2018"
+default-run = "boa"
 
 [features]
 default = ["wasm-bindgen"]
@@ -18,7 +19,6 @@ gc = "^0.3.3"
 gc_derive = "^0.3.2"
 serde_json = "^1.0.40"
 rand = "^0.7.0"
-chrono = "^0.4.8"
 regex = "^1.3.0"
 
 # Optional Dependencies
@@ -35,3 +35,11 @@ path = "src/lib/lib.rs"
 [[bench]]
 name = "string"
 harness = false
+
+[[bin]]
+name = "boa"
+path = "src/bin/bin.rs"
+
+[[bin]]
+name = "boashell"
+path = "src/bin/shell.rs"

Dockerfile

@@ -18,7 +18,7 @@ RUN apt-get -y update && \
 RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
 RUN apt-add-repository "deb http://apt.llvm.org/stretch/ llvm-toolchain-stretch-6.0 main"
 RUN apt-get -y update
-# RUN sudo apt-get -y install clang-6.0 lldb-6.0 
+RUN sudo apt-get -y lldb
 
 
 CMD ["/bin/bash"]

src/bin/shell.rs

@@ -0,0 +1,65 @@
+#![forbid(
+    warnings,
+    anonymous_parameters,
+    unused_extern_crates,
+    unused_import_braces,
+    missing_copy_implementations,
+    //trivial_casts,
+    variant_size_differences,
+    missing_debug_implementations,
+    trivial_numeric_casts
+)]
+// Debug trait derivation will show an error if forbidden.
+#![deny(unused_qualifications, unsafe_code)]
+#![deny(clippy::all)]
+#![warn(clippy::pedantic)]
+#![allow(
+    missing_docs,
+    clippy::many_single_char_names,
+    clippy::unreadable_literal,
+    clippy::excessive_precision,
+    clippy::module_name_repetitions
+)]
+
+use boa::{exec::Executor, forward_val};
+use std::{env, fs::read_to_string, process::exit};
+
+fn print_usage() {
+    println!(
+        "Usage:
+boa [file.js]
+    Interpret and execute file.js
+    (if no file given, defaults to tests/js/test.js"
+    );
+}
+
+pub fn main() -> Result<(), std::io::Error> {
+    let args: Vec<String> = env::args().collect();
+    let read_file;
+
+    match args.len() {
+        // One argument passed, assumed this is the test file
+        2 => {
+            read_file = &args[1];
+        }
+        // Some other number of arguments passed: not supported
+        _ => {
+            print_usage();
+            exit(1);
+        }
+    }
+
+    let buffer = read_to_string(read_file)?;
+
+    let mut engine = Executor::new();
+    let init = r#"
+        const print = console.log;
+        "#;
+
+    forward_val(&mut engine, init).unwrap();
+    match forward_val(&mut engine, &buffer) {
+        Ok(v) => print!("{}", v.to_string()),
+        Err(v) => eprint!("{}", v.to_string()),
+    }
+    Ok(())
+}

src/lib/exec.rs

@@ -1,7 +1,7 @@
 use crate::{
     environment::lexical_environment::{new_function_environment, LexicalEnvironment},
     js::{
-        array, console, function,
+        array, boolean, console, function,
         function::{Function, RegularFunction},
         json, math, object,
         object::{ObjectKind, INSTANCE_PROTOTYPE, PROTOTYPE},
@@ -266,7 +266,7 @@ impl Executor for Interpreter {
                 })
             }
             ExprDef::Construct(ref callee, ref args) => {
-                let func = self.run(callee)?;
+                let func_object = self.run(callee)?;
                 let mut v_args = Vec::with_capacity(args.len());
                 for arg in args.iter() {
                     v_args.push(self.run(arg)?);
@@ -275,19 +275,25 @@ impl Executor for Interpreter {
                 // Create a blank object, then set its __proto__ property to the [Constructor].prototype
                 this.borrow().set_internal_slot(
                     INSTANCE_PROTOTYPE,
-                    func.borrow().get_field_slice(PROTOTYPE),
+                    func_object.borrow().get_field_slice(PROTOTYPE),
                 );
-                match *func {
+
+                let construct = func_object.get_internal_slot("construct");
+
+                match *construct {
                     ValueData::Function(ref inner_func) => match inner_func.clone().into_inner() {
                         Function::NativeFunc(ref ntv) => {
                             let func = ntv.data;
-                            func(&this, &v_args, self)
+                            match func(&this, &v_args, self) {
+                                Ok(_) => Ok(this),
+                                Err(ref v) => Err(v.clone()),
+                            }
                         }
                         Function::RegularFunc(ref data) => {
                             // Create new scope
                             let env = &mut self.environment;
                             env.push(new_function_environment(
-                                func.clone(),
+                                construct.clone(),
                                 this.clone(),
                                 Some(env.get_current_environment_ref().clone()),
                             ));
@@ -386,11 +392,12 @@ impl InterpreterBuilder {
         object::init(&global);
         console::init(&global);
         math::init(&global);
-        array::init(&global);
         function::init(&global);
         json::init(&global);
-        regexp::init(&global);
+        global.set_field_slice("String", string::create_constructor(&global));
-        string::init(&global);
+        global.set_field_slice("RegExp", regexp::create_constructor(&global));
+        global.set_field_slice("Array", array::create_constructor(&global));
+        global.set_field_slice("Boolean", boolean::create_constructor(&global));
 
         Self { global }
     }

src/lib/js/array.rs

@@ -2,7 +2,7 @@ use crate::{
     exec::Interpreter,
     js::{
         function::NativeFunctionData,
-        object::{ObjectKind, PROTOTYPE},
+        object::{Object, ObjectKind, PROTOTYPE},
         property::Property,
         value::{from_value, to_value, ResultValue, Value, ValueData},
     },
@@ -11,7 +11,7 @@ use gc::Gc;
 
 /// Utility function for creating array objects: `array_obj` can be any array with
 /// prototype already set (it will be wiped and recreated from `array_contents`)
-fn create_array_object(array_obj: &Value, array_contents: &[Value]) -> ResultValue {
+fn construct_array(array_obj: &Value, array_contents: &[Value]) -> ResultValue {
     let array_obj_ptr = array_obj.clone();
 
     // Wipe existing contents of the array object
@@ -53,14 +53,14 @@ pub fn make_array(this: &Value, args: &[Value], _: &mut Interpreter) -> ResultVa
     // to its Javascript Identifier (global constructor method name)
     this.set_kind(ObjectKind::Array);
     match args.len() {
-        0 => create_array_object(this, &[]),
+        0 => construct_array(this, &[]),
         1 => {
-            let array = create_array_object(this, &[]).unwrap();
+            let array = construct_array(this, &[]).unwrap();
             let size: i32 = from_value(args[0].clone()).unwrap();
             array.set_field_slice("length", to_value(size));
             Ok(array)
         }
-        _ => create_array_object(this, args),
+        _ => construct_array(this, args),
     }
 }
 
@@ -99,7 +99,7 @@ pub fn concat(this: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue
         }
     }
 
-    create_array_object(this, &new_values)
+    construct_array(this, &new_values)
 }
 
 /// Array.prototype.push ( ...items )
@@ -252,30 +252,38 @@ pub fn unshift(this: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue
 }
 
 /// Create a new `Array` object
-pub fn _create(global: &Value) -> Value {
+pub fn create_constructor(global: &Value) -> Value {
-    let array = to_value(make_array as NativeFunctionData);
+    // Create Constructor
-    let proto = ValueData::new_obj(Some(global));
+    let mut array_constructor = Object::default();
+    array_constructor.kind = ObjectKind::Function;
+    array_constructor.set_internal_method("construct", make_array);
+    // Todo: add call function
+    array_constructor.set_internal_method("call", make_array);
+
+    // Create prototype
+    let array_prototype = ValueData::new_obj(Some(global));
+
     let length = Property::default().get(to_value(get_array_length as NativeFunctionData));
 
-    proto.set_prop_slice("length", length);
+    array_prototype.set_prop_slice("length", length);
     let concat_func = to_value(concat as NativeFunctionData);
     concat_func.set_field_slice("length", to_value(1_i32));
-    proto.set_field_slice("concat", concat_func);
+    array_prototype.set_field_slice("concat", concat_func);
     let push_func = to_value(push as NativeFunctionData);
     push_func.set_field_slice("length", to_value(1_i32));
-    proto.set_field_slice("push", push_func);
-    proto.set_field_slice("pop", to_value(pop as NativeFunctionData));
-    proto.set_field_slice("join", to_value(join as NativeFunctionData));
-    proto.set_field_slice("reverse", to_value(reverse as NativeFunctionData));
-    proto.set_field_slice("shift", to_value(shift as NativeFunctionData));
-    proto.set_field_slice("unshift", to_value(unshift as NativeFunctionData));
-    array.set_field_slice(PROTOTYPE, proto);
-    array
-}
 
-/// Initialise the global object with the `Array` object
+    array_prototype.set_field_slice("push", push_func);
-pub fn init(global: &Value) {
+    array_prototype.set_field_slice("pop", to_value(pop as NativeFunctionData));
-    global.set_field_slice("Array", _create(global));
+    array_prototype.set_field_slice("join", to_value(join as NativeFunctionData));
+    array_prototype.set_field_slice("reverse", to_value(reverse as NativeFunctionData));
+    array_prototype.set_field_slice("shift", to_value(shift as NativeFunctionData));
+    array_prototype.set_field_slice("unshift", to_value(unshift as NativeFunctionData));
+
+    let array = to_value(array_constructor);
+    array.set_field_slice(PROTOTYPE, to_value(array_prototype.clone()));
+
+    array_prototype.set_field_slice("constructor", array.clone());
+    array
 }
 
 #[cfg(test)]

src/lib/js/boolean.rs

@@ -1,17 +1,151 @@
-use gc::Gc;
+use crate::{
-use js::value::{to_value, ResultValue, Value, ValueData};
+    exec::Interpreter,
+    js::{
+        function::NativeFunctionData,
+        object::{Object, ObjectKind, PROTOTYPE},
+        value::{to_value, ResultValue, Value, ValueData},
+    },
+};
+use std::{borrow::Borrow, ops::Deref};
 
-/// Create a new boolean
+/// Create a new boolean object - [[Construct]]
-pub fn make_boolean(_: Vec<Value>, _: Value, _: Value, this: Value) -> ResultValue {
+pub fn construct_boolean(this: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue {
-    Ok(Gc::new(ValueData::Undefined))
+    this.set_kind(ObjectKind::Boolean);
+
+    // Get the argument, if any
+    match args.get(0) {
+        Some(ref value) => {
+            this.set_internal_slot("BooleanData", to_boolean(value));
+        }
+        None => {
+            this.set_internal_slot("BooleanData", to_boolean(&to_value(false)));
+        }
+    }
+
+    // no need to return `this` as its passed by reference
+    Ok(this.clone())
+}
+
+/// Return a boolean literal [[Call]]
+pub fn call_boolean(_: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue {
+    // Get the argument, if any
+    match args.get(0) {
+        Some(ref value) => Ok(to_boolean(value)),
+        None => Ok(to_boolean(&to_value(false))),
+    }
 }
+
+/// https://tc39.es/ecma262/#sec-boolean.prototype.tostring
+pub fn to_string(this: &Value, _: &[Value], _: &mut Interpreter) -> ResultValue {
+    let b = this_boolean_value(this);
+    Ok(to_value(b.to_string()))
+}
+
+/// https://tc39.es/ecma262/#sec-boolean.prototype.valueof
+pub fn value_of(this: &Value, _: &[Value], _: &mut Interpreter) -> ResultValue {
+    Ok(this_boolean_value(this))
+}
+
 /// Create a new `Boolean` object
-pub fn _create(global: Value) -> Value {
+pub fn create_constructor(global: &Value) -> Value {
-    let boolean = to_value(make_boolean);
+    let mut boolean = Object::default();
-    boolean
+    boolean.kind = ObjectKind::Function;
-}
+    boolean.set_internal_method("construct", construct_boolean);
-/// Initialise the global object with the `Error` object
+    boolean.set_internal_method("call", call_boolean);
-pub fn init(global: &Value) {
+    // Create Prototype
-    let global_ptr = global.borrow();
+    // https://tc39.es/ecma262/#sec-properties-of-the-boolean-prototype-object
-    global_ptr.set_field_slice("Boolean", _create(global));
+    let boolean_prototype = ValueData::new_obj(Some(global));
+    boolean_prototype.set_internal_slot("BooleanData", to_boolean(&to_value(false)));
+    boolean_prototype.set_field_slice("toString", to_value(to_string as NativeFunctionData));
+    boolean_prototype.set_field_slice("valueOf", to_value(value_of as NativeFunctionData));
+
+    let boolean_value = to_value(boolean);
+    boolean_prototype.set_field_slice("constructor", to_value(boolean_value.clone()));
+    boolean_value.set_field_slice(PROTOTYPE, boolean_prototype);
+    boolean_value
+}
+
+// === Utility Functions ===
+/// [toBoolean](https://tc39.github.io/ecma262/#sec-toboolean)
+/// Creates a new boolean value from the input
+pub fn to_boolean(value: &Value) -> Value {
+    match *value.deref().borrow() {
+        ValueData::Object(_) => to_value(true),
+        ValueData::String(ref s) if !s.is_empty() => to_value(true),
+        ValueData::Number(n) if n != 0.0 && !n.is_nan() => to_value(true),
+        ValueData::Integer(n) if n != 0 => to_value(true),
+        ValueData::Boolean(v) => to_value(v),
+        _ => to_value(false),
+    }
+}
+
+pub fn this_boolean_value(value: &Value) -> Value {
+    match *value.deref().borrow() {
+        ValueData::Boolean(v) => to_value(v),
+        ValueData::Object(ref v) => (v).deref().borrow().get_internal_slot("BooleanData"),
+        _ => to_value(false),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::exec::Executor;
+    use crate::{forward, forward_val, js::value::same_value};
+
+    #[test]
+    fn check_boolean_constructor_is_function() {
+        let global = ValueData::new_obj(None);
+        let boolean_constructor = create_constructor(&global);
+        assert_eq!(boolean_constructor.is_function(), true);
+    }
+
+    #[test]
+    fn constructor_gives_true_instance() {
+        let mut engine = Executor::new();
+        let init = r#"
+        const trueVal = new Boolean(true);
+        const trueNum = new Boolean(1);
+        const trueString = new Boolean("true");
+        const trueBool = new Boolean(trueVal);
+        "#;
+
+        forward(&mut engine, init);
+        let true_val = forward_val(&mut engine, "trueVal").expect("value expected");
+        let true_num = forward_val(&mut engine, "trueNum").expect("value expected");
+        let true_string = forward_val(&mut engine, "trueString").expect("value expected");
+        let true_bool = forward_val(&mut engine, "trueBool").expect("value expected");
+
+        // Values should all be objects
+        assert_eq!(true_val.is_object(), true);
+        assert_eq!(true_num.is_object(), true);
+        assert_eq!(true_string.is_object(), true);
+        assert_eq!(true_bool.is_object(), true);
+
+        // Values should all be truthy
+        assert_eq!(true_val.is_true(), true);
+        assert_eq!(true_num.is_true(), true);
+        assert_eq!(true_string.is_true(), true);
+        assert_eq!(true_bool.is_true(), true);
+    }
+
+    #[test]
+    fn instances_have_correct_proto_set() {
+        let mut engine = Executor::new();
+        let init = r#"
+        const boolInstance = new Boolean(true);
+        const boolProto = Boolean.prototype;
+        "#;
+
+        forward(&mut engine, init);
+        let bool_instance = forward_val(&mut engine, "boolInstance").expect("value expected");
+        let bool_prototype = forward_val(&mut engine, "boolProto").expect("value expected");
+
+        assert!(same_value(
+            &bool_instance.get_internal_slot("__proto__"),
+            &bool_prototype,
+            true
+        ));
+    }
+
 }

src/lib/js/console.rs

@@ -2,7 +2,6 @@ use crate::exec::Interpreter;
 use crate::js::function::NativeFunctionData;
 use crate::js::object::{ObjectKind, INSTANCE_PROTOTYPE};
 use crate::js::value::{from_value, to_value, ResultValue, Value, ValueData};
-use chrono::Local;
 use gc::Gc;
 use std::fmt::Write;
 use std::iter::FromIterator;
@@ -29,6 +28,10 @@ fn log_string_from(x: Value) -> String {
                     .expect("Cannot clone primitive value from String");
                     write!(s, "{}", str_val).unwrap();
                 }
+                ObjectKind::Boolean => {
+                    let bool_data = v.borrow().get_internal_slot("BooleanData").to_string();
+                    write!(s, "Boolean {{ {} }}", bool_data).unwrap();
+                }
                 ObjectKind::Array => {
                     write!(s, "[").unwrap();
                     let len: i32 = from_value(
@@ -103,11 +106,7 @@ pub fn log(_: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue {
     let args: Vec<String> =
         FromIterator::from_iter(args.iter().map(|x| log_string_from(x.clone())));
 
-    println!(
+    println!("{}", args.join(" "));
-        "{}: {}",
-        Local::now().format("%X").to_string(),
-        args.join(" ")
-    );
     Ok(Gc::new(ValueData::Undefined))
 }
 /// Print a javascript value to the standard error stream
@@ -116,11 +115,7 @@ pub fn error(_: &Value, args: &[Value], _: &mut Interpreter) -> ResultValue {
         args.iter()
             .map(|x| from_value::<String>(x.clone()).unwrap()),
     );
-    println!(
+    println!("{}", args.join(" "));
-        "{}: {}",
-        Local::now().format("%X").to_string(),
-        args.join(" ")
-    );
     Ok(Gc::new(ValueData::Undefined))
 }
 /// Create a new `console` object

src/lib/js/mod.rs

@@ -1,5 +1,7 @@
 /// The global `Array` object
 pub mod array;
+// The global `Boolean` object
+pub mod boolean;
 /// The global `console` object
 pub mod console;
 /// The global `Error` object

src/lib/js/object.rs

@@ -72,6 +72,11 @@ impl Object {
         self.internal_slots.insert(name.to_string(), val);
     }
 
+    /// Utility function to set an internal slot which is a function
+    pub fn set_internal_method(&mut self, name: &str, val: NativeFunctionData) {
+        self.internal_slots.insert(name.to_string(), to_value(val));
+    }
+
     /// Return a new Boolean object whose [[BooleanData]] internal slot is set to argument.
     fn from_boolean(argument: &Value) -> Self {
         let mut obj = Object {
@@ -123,6 +128,7 @@ impl Object {
             ValueData::Boolean(_) => Ok(Self::from_boolean(value)),
             ValueData::Number(_) => Ok(Self::from_number(value)),
             ValueData::String(_) => Ok(Self::from_string(value)),
+            ValueData::Object(ref obj) => Ok(obj.borrow().clone()),
             _ => Err(()),
         }
     }
@@ -152,7 +158,7 @@ impl Object {
         while !done {
             if p.is_null() {
                 done = true
-            } else if same_value(&to_value(self.clone()), &p) {
+            } else if same_value(&to_value(self.clone()), &p, false) {
                 return false;
             } else {
                 p = p.get_internal_slot(PROTOTYPE);
@@ -223,6 +229,7 @@ impl Object {
         true
     }
 
+    #[allow(clippy::option_unwrap_used)]
     pub fn define_own_property(&mut self, property_key: String, desc: Property) -> bool {
         let mut current = self.get_own_property(&to_value(property_key.to_string()));
         let extensible = self.is_extensible();
@@ -287,7 +294,7 @@ impl Object {
                 current.get = None;
                 current.set = None;
             }
-            self.properties.insert(property_key, current);
+            self.properties.insert(property_key, current.clone());
         // 7
         } else if current.is_data_descriptor() && desc.is_data_descriptor() {
             // a
@@ -300,6 +307,7 @@ impl Object {
                     && !same_value(
                         &desc.value.clone().unwrap(),
                         &current.value.clone().unwrap(),
+                        false,
                     )
                 {
                     return false;
@@ -309,10 +317,89 @@ impl Object {
             }
         // 8
         } else {
+            if !current.configurable.unwrap() {
+                if desc.set.is_some()
+                    && !same_value(
+                        &desc.set.clone().unwrap(),
+                        &current.set.clone().unwrap(),
+                        false,
+                    )
+                {
+                    return false;
+                }
+
+                if desc.get.is_some()
+                    && !same_value(
+                        &desc.get.clone().unwrap(),
+                        &current.get.clone().unwrap(),
+                        false,
+                    )
+                {
+                    return false;
+                }
+            }
 
+            return true;
         }
+        // 9
+        Property::assign(&mut current, &desc);
         true
     }
+
+    // [[Delete]]
+    pub fn delete(&mut self, prop_key: &Value) -> bool {
+        debug_assert!(Property::is_property_key(prop_key));
+        let desc = self.get_own_property(prop_key);
+        if desc
+            .value
+            .clone()
+            .expect("unable to get value")
+            .is_undefined()
+        {
+            return true;
+        }
+        if desc.configurable.expect("unable to get value") {
+            self.properties.remove(&prop_key.to_string());
+            return true;
+        }
+
+        false
+    }
+
+    // [[Get]]
+    pub fn get(&self, val: &Value) -> Value {
+        debug_assert!(Property::is_property_key(val));
+        let desc = self.get_own_property(val);
+        if desc.value.clone().is_none()
+            || desc
+                .value
+                .clone()
+                .expect("Failed to get object")
+                .is_undefined()
+        {
+            // parent will either be null or an Object
+            let parent = self.get_prototype_of();
+            if parent.is_null() {
+                return Gc::new(ValueData::Undefined);
+            }
+
+            let parent_obj = Object::from(&parent).expect("Failed to get object");
+
+            return parent_obj.get(val);
+        }
+
+        if desc.is_data_descriptor() {
+            return desc.value.clone().expect("failed to extract value");
+        }
+
+        let getter = desc.get.clone();
+        if getter.is_none() || getter.expect("Failed to get object").is_undefined() {
+            return Gc::new(ValueData::Undefined);
+        }
+
+        // TODO!!!!! Call getter from here
+        Gc::new(ValueData::Undefined)
+    }
 }
 
 #[derive(Trace, Finalize, Clone, Debug)]

src/lib/js/property.rs

@@ -106,6 +106,29 @@ impl Property {
     pub fn is_generic_descriptor(&self) -> bool {
         !self.is_accessor_descriptor() && !self.is_data_descriptor()
     }
+
+    /// This copies only present property fields from B to A
+    pub fn assign(a: &mut Property, b: &Property) {
+        if b.get.is_some() {
+            a.get = b.get.clone();
+        }
+
+        if b.set.is_some() {
+            a.set = b.set.clone();
+        }
+
+        if b.configurable.is_some() {
+            a.configurable = b.configurable;
+        }
+
+        if b.writable.is_some() {
+            a.writable = b.writable;
+        }
+
+        if b.enumerable.is_some() {
+            a.enumerable = b.enumerable;
+        }
+    }
 }
 
 impl Default for Property {

src/lib/js/regexp.rs

@@ -7,7 +7,7 @@ use crate::{
     exec::Interpreter,
     js::{
         function::NativeFunctionData,
-        object::{InternalState, ObjectKind, PROTOTYPE},
+        object::{InternalState, Object, ObjectKind, PROTOTYPE},
         property::Property,
         value::{from_value, to_value, FromValue, ResultValue, Value, ValueData},
     },
@@ -258,8 +258,15 @@ pub fn to_string(this: &Value, _: &[Value], _: &mut Interpreter) -> ResultValue
 }
 
 /// Create a new `RegExp` object
-pub fn _create(global: &Value) -> Value {
+pub fn create_constructor(global: &Value) -> Value {
-    let regexp = to_value(make_regexp as NativeFunctionData);
+    // Create constructor function
+    let mut regexp_constructor = Object::default();
+    regexp_constructor.kind = ObjectKind::Function;
+    regexp_constructor.set_internal_method("construct", make_regexp);
+    // Todo: add call function, currently call points to contructor, this is wrong
+    regexp_constructor.set_internal_method("call", make_regexp);
+
+    // Create prototype
     let proto = ValueData::new_obj(Some(global));
     proto.set_field_slice("test", to_value(test as NativeFunctionData));
     proto.set_field_slice("exec", to_value(exec as NativeFunctionData));
@@ -273,17 +280,16 @@ pub fn _create(global: &Value) -> Value {
     proto.set_prop_slice("source", _make_prop(get_source));
     proto.set_prop_slice("sticky", _make_prop(get_sticky));
     proto.set_prop_slice("unicode", _make_prop(get_unicode));
-    regexp.set_field_slice(PROTOTYPE, proto);
-    regexp
-}
 
-/// Initialise the `RegExp` object on the global object
+    let regexp = to_value(regexp_constructor);
-pub fn init(global: &Value) {
+    regexp.set_field_slice(PROTOTYPE, proto.clone());
-    global.set_field_slice("RegExp", _create(global));
+    proto.set_field_slice("constructor", regexp.clone());
+    regexp
 }
 
 #[cfg(test)]
 mod tests {
+    use super::*;
     use crate::exec::Executor;
     use crate::forward;
 
@@ -302,6 +308,13 @@ mod tests {
         assert_eq!(forward(&mut engine, "ctor_literal.test('1.0')"), "true");
     }
 
+    #[test]
+    fn check_regexp_constructor_is_function() {
+        let global = ValueData::new_obj(None);
+        let regexp_constructor = create_constructor(&global);
+        assert_eq!(regexp_constructor.is_function(), true);
+    }
+
     // TODO: uncomment this test when property getters are supported
 
     //    #[test]

src/lib/js/string.rs

@@ -2,12 +2,11 @@ use crate::{
     exec::Interpreter,
     js::{
         function::NativeFunctionData,
-        object::{ObjectKind, PROTOTYPE},
+        object::{Object, ObjectKind, PROTOTYPE},
         property::Property,
         value::{from_value, to_value, ResultValue, Value, ValueData},
     },
 };
-use gc::Gc;
 use std::{
     cmp::{max, min},
     f64::NAN,
@@ -522,8 +521,17 @@ pub fn trim_end(this: &Value, _: &[Value], ctx: &mut Interpreter) -> ResultValue
 }
 
 /// Create a new `String` object
-pub fn _create(global: &Value) -> Value {
+pub fn create_constructor(global: &Value) -> Value {
-    let string = to_value(make_string as NativeFunctionData);
+    // Create constructor function object
+    let mut string_constructor = Object::default();
+    string_constructor.kind = ObjectKind::Function;
+
+    string_constructor.set_internal_method("construct", make_string);
+    // Todo: add call internal method (should be easy)
+    // Currently call points to the constructor function, this is wrong
+    string_constructor.set_internal_method("call", make_string);
+
+    // Create prototype
     let proto = ValueData::new_obj(Some(global));
     let prop = Property::default().get(to_value(get_string_length as NativeFunctionData));
 
@@ -543,13 +551,16 @@ pub fn _create(global: &Value) -> Value {
     proto.set_field_slice("padStart", to_value(pad_start as NativeFunctionData));
     proto.set_field_slice("trim", to_value(trim as NativeFunctionData));
     proto.set_field_slice("trimStart", to_value(trim_start as NativeFunctionData));
+
+    let string = to_value(string_constructor);
+    proto.set_field_slice("constructor", string.clone());
     string.set_field_slice(PROTOTYPE, proto);
     string
 }
 
 /// Initialise the `String` object on the global object
 pub fn init(global: &Value) {
-    global.set_field_slice("String", _create(global));
+    global.set_field_slice("String", create_constructor(global));
 }
 
 #[cfg(test)]
@@ -561,7 +572,7 @@ mod tests {
     #[test]
     fn check_string_constructor_is_function() {
         let global = ValueData::new_obj(None);
-        let string_constructor = _create(&global);
+        let string_constructor = create_constructor(&global);
         assert_eq!(string_constructor.is_function(), true);
     }
 

src/lib/js/value.rs

@@ -94,6 +94,7 @@ impl ValueData {
     pub fn is_function(&self) -> bool {
         match *self {
             ValueData::Function(_) => true,
+            ValueData::Object(ref o) => o.deref().borrow().get_internal_slot("call").is_function(),
             _ => false,
         }
     }
@@ -524,6 +525,7 @@ impl ValueData {
     }
 
     /// Get the type of the value
+    /// https://tc39.es/ecma262/#sec-typeof-operator
     pub fn get_type(&self) -> &'static str {
         match *self {
             ValueData::Number(_) | ValueData::Integer(_) => "number",
@@ -531,7 +533,14 @@ impl ValueData {
             ValueData::Boolean(_) => "boolean",
             ValueData::Null => "null",
             ValueData::Undefined => "undefined",
-            _ => "object",
+            ValueData::Function(_) => "function",
+            ValueData::Object(ref o) => {
+                if o.deref().borrow().get_internal_slot("call").is_null() {
+                    "object"
+                } else {
+                    "function"
+                }
+            }
         }
     }
 }
@@ -559,37 +568,7 @@ impl Display for ValueData {
                     _ => v.to_string(),
                 }
             ),
-            ValueData::Object(ref v) => {
+            ValueData::Object(_) => write!(f, "{{}}"),
-                write!(f, "{{")?;
-                // Print public properties
-                if let Some((last_key, _)) = v.borrow().properties.iter().last() {
-                    for (key, val) in v.borrow().properties.iter() {
-                        write!(
-                            f,
-                            "{}: {}",
-                            key,
-                            val.value
-                                .as_ref()
-                                .unwrap_or(&Gc::new(ValueData::Undefined))
-                                .clone()
-                        )?;
-                        if key != last_key {
-                            write!(f, ", ")?;
-                        }
-                    }
-                };
-
-                // Print internal slots
-                if let Some((last_key, _)) = v.borrow().internal_slots.iter().last() {
-                    for (key, val) in v.borrow().internal_slots.iter() {
-                        write!(f, "[[{}]]: {}", key, &val)?;
-                        if key != last_key {
-                            write!(f, ", ")?;
-                        }
-                    }
-                };
-                write!(f, "}}")
-            }
             ValueData::Integer(v) => write!(f, "{}", v),
             ValueData::Function(ref v) => match *v.borrow() {
                 Function::NativeFunc(_) => write!(f, "function() {{ [native code] }}"),
@@ -919,7 +898,15 @@ pub fn to_value<A: ToValue>(v: A) -> Value {
 /// Such a comparison is performed as follows:
 ///
 /// https://tc39.es/ecma262/#sec-samevalue
-pub fn same_value(x: &Value, y: &Value) -> bool {
+/// strict mode currently compares the pointers
+pub fn same_value(x: &Value, y: &Value, strict: bool) -> bool {
+    if strict {
+        // Do both Values point to the same underlying valueData?
+        let x_ptr = Gc::into_raw(x.clone());
+        let y_ptr = Gc::into_raw(y.clone());
+        return x_ptr == y_ptr;
+    }
+
     if x.get_type() != y.get_type() {
         return false;
     }
@@ -948,6 +935,11 @@ pub fn same_value_non_number(x: &Value, y: &Value) -> bool {
             from_value::<bool>(x.clone()).expect("failed to get value")
                 == from_value::<bool>(y.clone()).expect("failed to get value")
         }
+        "object" => {
+            let b = ValueData::new_obj(None);
+            dbg!(b == b);
+            *x == *y
+        }
         _ => false,
     }
 }

src/lib/lib.rs

@@ -40,6 +40,7 @@ pub mod syntax;
 
 use crate::{
     exec::{Executor, Interpreter},
+    js::value::ResultValue,
     syntax::{ast::expr::Expr, lexer::Lexer, parser::Parser},
 };
 use wasm_bindgen::prelude::*;
@@ -71,6 +72,16 @@ pub fn forward(engine: &mut Interpreter, src: &str) -> String {
     }
 }
 
+/// Execute the code using an existing Interpreter
+/// The str is consumed and the state of the Interpreter is changed
+/// Similar to `forward`, except the current value is returned instad of the string
+/// If the interpreter fails parsing an error value is returned instead (error object)
+pub fn forward_val(engine: &mut Interpreter, src: &str) -> ResultValue {
+    // Setup executor
+    let expr = parser_expr(src);
+    engine.run(&expr)
+}
+
 /// Create a clean Interpreter and execute the code
 pub fn exec(src: &str) -> String {
     let mut engine: Interpreter = Executor::new();

tests/js/test.js

@@ -1 +1,2 @@
-("Jason").charAt(2);
+let a = "hello";
+print(a);