forked from AbleScript/ablescript
Divided token types
- Item = Expr | Stmt - Added REPL (AST dump) - Removed operator parsing because it was horrible and I need to redo it
This commit is contained in:
ondra05
parent
c26c4a14bb
commit
d7cf1b013d
156
Cargo.lock
generated
156
Cargo.lock
generated
|
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@ -9,6 +9,7 @@ dependencies = [
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"clap",
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"logos",
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"rand",
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"rustyline",
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]
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[[package]]
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@ -43,6 +44,12 @@ version = "1.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
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[[package]]
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name = "cc"
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version = "1.0.67"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
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[[package]]
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name = "cfg-if"
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version = "1.0.0"
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@ -64,12 +71,49 @@ dependencies = [
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"vec_map",
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]
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[[package]]
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name = "dirs-next"
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version = "2.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
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dependencies = [
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"cfg-if",
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"dirs-sys-next",
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]
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[[package]]
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name = "dirs-sys-next"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
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dependencies = [
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"libc",
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"redox_users",
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"winapi",
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]
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[[package]]
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name = "endian-type"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c34f04666d835ff5d62e058c3995147c06f42fe86ff053337632bca83e42702d"
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[[package]]
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name = "fnv"
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version = "1.0.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
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[[package]]
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name = "fs2"
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version = "0.4.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
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dependencies = [
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"libc",
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"winapi",
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]
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[[package]]
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name = "getrandom"
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version = "0.2.2"
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@ -96,6 +140,15 @@ version = "0.2.93"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
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[[package]]
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name = "log"
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version = "0.4.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
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dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "logos"
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version = "0.12.0"
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@ -120,6 +173,33 @@ dependencies = [
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"utf8-ranges",
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]
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[[package]]
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name = "memchr"
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version = "2.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
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[[package]]
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name = "nibble_vec"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "77a5d83df9f36fe23f0c3648c6bbb8b0298bb5f1939c8f2704431371f4b84d43"
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dependencies = [
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"smallvec",
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]
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[[package]]
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name = "nix"
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version = "0.20.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fa9b4819da1bc61c0ea48b63b7bc8604064dd43013e7cc325df098d49cd7c18a"
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dependencies = [
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"bitflags",
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"cc",
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"cfg-if",
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"libc",
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]
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[[package]]
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name = "ppv-lite86"
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version = "0.2.10"
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@ -144,6 +224,16 @@ dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "radix_trie"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c069c179fcdc6a2fe24d8d18305cf085fdbd4f922c041943e203685d6a1c58fd"
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dependencies = [
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"endian-type",
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"nibble_vec",
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]
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[[package]]
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name = "rand"
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version = "0.8.3"
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@ -184,12 +274,66 @@ dependencies = [
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"rand_core",
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]
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[[package]]
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name = "redox_syscall"
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version = "0.2.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "85dd92e586f7355c633911e11f77f3d12f04b1b1bd76a198bd34ae3af8341ef2"
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dependencies = [
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"bitflags",
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]
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[[package]]
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name = "redox_users"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
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dependencies = [
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"getrandom",
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"redox_syscall",
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]
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[[package]]
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name = "regex-syntax"
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version = "0.6.23"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "24d5f089152e60f62d28b835fbff2cd2e8dc0baf1ac13343bef92ab7eed84548"
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[[package]]
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name = "rustyline"
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version = "8.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b9e1b597fcd1eeb1d6b25b493538e5aa19629eb08932184b85fef931ba87e893"
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dependencies = [
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"bitflags",
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"cfg-if",
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"dirs-next",
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"fs2",
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"libc",
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"log",
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"memchr",
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"nix",
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"radix_trie",
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"scopeguard",
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"smallvec",
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"unicode-segmentation",
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"unicode-width",
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"utf8parse",
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"winapi",
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]
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[[package]]
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name = "scopeguard"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
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[[package]]
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name = "smallvec"
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version = "1.6.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
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[[package]]
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name = "strsim"
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version = "0.8.0"
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@ -216,6 +360,12 @@ dependencies = [
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"unicode-width",
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]
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[[package]]
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name = "unicode-segmentation"
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version = "1.7.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
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[[package]]
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name = "unicode-width"
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version = "0.1.8"
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@ -234,6 +384,12 @@ version = "1.0.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b4ae116fef2b7fea257ed6440d3cfcff7f190865f170cdad00bb6465bf18ecba"
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[[package]]
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name = "utf8parse"
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version = "0.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "936e4b492acfd135421d8dca4b1aa80a7bfc26e702ef3af710e0752684df5372"
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[[package]]
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name = "vec_map"
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version = "0.8.2"
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@ -10,3 +10,4 @@ edition = "2018"
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clap="*"
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logos = "0.12"
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rand = "*"
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rustyline = "8.0.0"
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@ -1 +0,0 @@
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1 + 4
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@ -4,6 +4,7 @@ mod base_55;
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mod error;
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mod lexer;
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mod parser;
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mod repl;
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mod variables;
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use clap::{App, Arg};
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@ -14,7 +15,7 @@ fn main() {
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let matches = App::new("AbleScript")
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.version(env!("CARGO_PKG_VERSION"))
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.author("Able <abl3theabove@gmail.com>")
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.about("Does awesome things")
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.about("AbleScript interpreter")
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.arg(
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Arg::with_name("file")
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.short("f")
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@ -36,8 +37,8 @@ fn main() {
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println!("{:#?}", ast);
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}
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None => {
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println!("hi");
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//start the prompt
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println!("Hi [AbleScript {}] - AST Printer", env!("CARGO_PKG_VERSION"));
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repl::repl();
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}
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}
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}
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@ -1,47 +1,61 @@
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use std::collections::HashMap;
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use crate::variables::Value;
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#[derive(Debug, Clone, Hash, PartialEq, Eq)]
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pub struct Iden(pub String);
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impl From<Iden> for Expr {
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fn from(iden: Iden) -> Self {
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Self::Identifier(iden)
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#[derive(Debug, Clone)]
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pub enum Item {
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Expr(Expr),
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Stmt(Stmt),
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}
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impl From<Expr> for Item {
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fn from(e: Expr) -> Self {
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Item::Expr(e)
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}
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}
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impl From<Stmt> for Item {
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fn from(s: Stmt) -> Self {
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Item::Stmt(s)
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}
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}
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#[derive(Debug, Clone)]
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pub enum Expr {
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Add { left: Box<Expr>, right: Box<Expr> },
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Subtract { left: Box<Expr>, right: Box<Expr> },
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Multiply { left: Box<Expr>, right: Box<Expr> },
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Divide { left: Box<Expr>, right: Box<Expr> },
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FunctionCall { iden: Iden, args: Vec<Expr> },
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Literal(Value),
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Identifier(Iden),
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}
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impl From<Iden> for Expr {
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fn from(i: Iden) -> Self {
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Self::Identifier(i)
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}
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}
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#[derive(Debug, Clone)]
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pub enum Stmt {
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VariableDeclaration {
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iden: String,
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init: Option<Box<Expr>>,
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iden: Iden,
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init: Option<Box<Item>>,
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},
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FunctionDeclaration {
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iden: String,
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iden: Iden,
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args: Vec<Iden>,
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body: Vec<Expr>,
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body: Vec<Item>,
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},
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BfFDeclaration {
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iden: String,
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iden: Iden,
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body: String,
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},
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If {
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cond: Box<Expr>,
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body: Vec<Expr>,
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cond: Box<Item>,
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body: Vec<Item>,
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},
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FunctionCall {
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iden: Iden,
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args: Vec<Expr>,
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},
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Addition {
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left: Box<Expr>,
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right: Box<Expr>,
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},
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Literal(Value),
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Identifier(Iden),
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Melo(Iden),
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}
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@ -2,19 +2,22 @@ mod item;
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mod ops;
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mod utils;
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use item::Expr;
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use item::Item;
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use crate::{
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error::{Error, ErrorKind},
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lexer::PeekableLexer,
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parser::item::{Expr, Stmt},
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variables::Value,
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};
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use crate::{lexer::Token, parser::item::Iden};
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pub type ParseResult = Result<Item, Error>;
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/// Parser structure / state machine
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pub struct Parser<'a> {
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lexer: PeekableLexer<'a>,
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ast: Vec<Expr>,
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ast: Vec<Item>,
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}
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impl<'a> Parser<'a> {
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@ -26,19 +29,19 @@ impl<'a> Parser<'a> {
|
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}
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}
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pub fn init(&mut self) -> Result<Vec<Expr>, Error> {
|
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pub fn init(&mut self) -> Result<Vec<Item>, Error> {
|
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loop {
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let token = self.lexer.next();
|
||||
if token.is_none() {
|
||||
return Ok(self.ast.clone());
|
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};
|
||||
|
||||
let expr = self.parse_expr(token)?;
|
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let expr = self.parse_item(token)?;
|
||||
self.ast.push(expr);
|
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}
|
||||
}
|
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|
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fn parse_expr(&mut self, token: Option<Token>) -> Result<Expr, Error> {
|
||||
fn parse_item(&mut self, token: Option<Token>) -> ParseResult {
|
||||
if matches!(token, None) {
|
||||
return Err(Error {
|
||||
kind: ErrorKind::EndOfTokenStream,
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|
|
@ -50,7 +53,7 @@ impl<'a> Parser<'a> {
|
|||
let start = self.lexer.span().start;
|
||||
|
||||
match token {
|
||||
Token::Identifier(_) => self.parse_ops(token),
|
||||
Token::Identifier(_) => self.parse_ops(token).map(|x| x.into()),
|
||||
// Control flow
|
||||
Token::If => self.if_cond(),
|
||||
|
||||
|
|
@ -60,17 +63,17 @@ impl<'a> Parser<'a> {
|
|||
Token::BfFunction => self.bff_declaration(),
|
||||
|
||||
// Literals
|
||||
Token::String(x) => Ok(Expr::Literal(Value::Str(x))),
|
||||
Token::Integer(x) => Ok(Expr::Literal(Value::Int(x))),
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||||
Token::Boolean(x) => Ok(Expr::Literal(Value::Bool(x))),
|
||||
Token::Aboolean(x) => Ok(Expr::Literal(Value::Abool(x))),
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||||
Token::String(x) => Ok(Expr::Literal(Value::Str(x)).into()),
|
||||
Token::Integer(x) => Ok(Expr::Literal(Value::Int(x)).into()),
|
||||
Token::Boolean(x) => Ok(Expr::Literal(Value::Bool(x)).into()),
|
||||
Token::Aboolean(x) => Ok(Expr::Literal(Value::Abool(x)).into()),
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|
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// Prefix keywords
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// Melo - ban variable from next usage (runtime error)
|
||||
Token::Melo => {
|
||||
let e = self.require_iden()?;
|
||||
self.require(Token::Semicolon)?;
|
||||
Ok(Expr::Melo(Iden(e)))
|
||||
Ok(Stmt::Melo(e).into())
|
||||
}
|
||||
|
||||
_ => Err(Error {
|
||||
|
|
@ -83,14 +86,14 @@ impl<'a> Parser<'a> {
|
|||
/// Parse variable declaration
|
||||
///
|
||||
/// `var [iden] = [literal];`
|
||||
fn variable_declaration(&mut self) -> Result<Expr, Error> {
|
||||
fn variable_declaration(&mut self) -> ParseResult {
|
||||
let iden = self.require_iden()?;
|
||||
|
||||
let init = match self.lexer.next() {
|
||||
Some(Token::Semicolon) => None,
|
||||
Some(Token::Assignment) => {
|
||||
let value = self.lexer.next();
|
||||
let value = self.parse_expr(value)?;
|
||||
let value = self.parse_item(value)?;
|
||||
self.require(Token::Semicolon)?;
|
||||
Some(Box::new(value))
|
||||
}
|
||||
|
|
@ -102,13 +105,13 @@ impl<'a> Parser<'a> {
|
|||
}
|
||||
};
|
||||
|
||||
Ok(Expr::VariableDeclaration { iden, init })
|
||||
Ok(Stmt::VariableDeclaration { iden, init }.into())
|
||||
}
|
||||
|
||||
/// Declare function
|
||||
///
|
||||
/// `functio [iden] ([expr], [expr]) { ... }
|
||||
fn function_declaration(&mut self) -> Result<Expr, Error> {
|
||||
fn function_declaration(&mut self) -> ParseResult {
|
||||
let iden = self.require_iden()?;
|
||||
self.require(Token::LeftParenthesis)?;
|
||||
let args = vec![];
|
||||
|
|
@ -118,13 +121,13 @@ impl<'a> Parser<'a> {
|
|||
// Parse function body
|
||||
let body = self.parse_body()?;
|
||||
|
||||
Ok(Expr::FunctionDeclaration { iden, args, body })
|
||||
Ok(Stmt::FunctionDeclaration { iden, args, body }.into())
|
||||
}
|
||||
|
||||
/// Declare BF FFI Function
|
||||
///
|
||||
/// `bff [iden] { ... }`
|
||||
fn bff_declaration(&mut self) -> Result<Expr, Error> {
|
||||
fn bff_declaration(&mut self) -> ParseResult {
|
||||
let iden = self.require_iden()?;
|
||||
self.require(Token::LeftBrace)?;
|
||||
|
||||
|
|
@ -155,23 +158,24 @@ impl<'a> Parser<'a> {
|
|||
_ => return Err(self.unexpected_token(None)),
|
||||
});
|
||||
}
|
||||
Ok(Expr::BfFDeclaration { iden, body })
|
||||
Ok(Stmt::BfFDeclaration { iden, body }.into())
|
||||
}
|
||||
|
||||
/// Parse If-expression
|
||||
pub fn if_cond(&mut self) -> Result<Expr, Error> {
|
||||
pub fn if_cond(&mut self) -> ParseResult {
|
||||
self.require(Token::LeftParenthesis)?;
|
||||
let cond = self.lexer.next();
|
||||
let cond = self.parse_expr(cond)?;
|
||||
let cond = self.parse_item(cond)?;
|
||||
self.require(Token::RightParenthesis)?;
|
||||
|
||||
self.require(Token::LeftBrace)?;
|
||||
|
||||
let body = self.parse_body()?;
|
||||
|
||||
Ok(Expr::If {
|
||||
Ok(Stmt::If {
|
||||
cond: Box::new(cond),
|
||||
body,
|
||||
})
|
||||
}
|
||||
.into())
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,39 +1,27 @@
|
|||
use super::*;
|
||||
|
||||
type ExprResult = Result<Expr, Error>;
|
||||
|
||||
impl<'a> Parser<'a> {
|
||||
/// Parse operations (got identifier/value)
|
||||
pub(super) fn parse_ops(&mut self, token: Token) -> Result<Expr, Error> {
|
||||
let iden = if let Token::Identifier(i) = token {
|
||||
Iden(i)
|
||||
} else {
|
||||
unimplemented!()
|
||||
};
|
||||
|
||||
let mut buf = Vec::new();
|
||||
|
||||
buf.push(match self.lexer.peek() {
|
||||
Some(Token::LeftParenthesis) => self.fn_call(iden)?,
|
||||
_ => unimplemented!(),
|
||||
});
|
||||
|
||||
Ok(buf[0].clone())
|
||||
pub(super) fn parse_ops(&mut self, token: Token) -> ExprResult {
|
||||
todo!()
|
||||
}
|
||||
|
||||
/// Parse function call
|
||||
fn fn_call(&mut self, iden: Iden) -> Result<Expr, Error> {
|
||||
fn fn_call(&mut self, iden: Iden) -> ExprResult {
|
||||
self.lexer.next();
|
||||
let mut args: Vec<Expr> = Vec::new();
|
||||
|
||||
while let Some(token) = self.lexer.peek() {
|
||||
match token {
|
||||
Token::Identifier(id) => {
|
||||
args.push(Iden(id.clone()).into());
|
||||
args.push(Expr::Identifier(Iden(id.clone())));
|
||||
self.lexer.next();
|
||||
}
|
||||
Token::RightParenthesis => break,
|
||||
_ => {
|
||||
let next = self.lexer.next();
|
||||
args.push(self.parse_expr(next)?)
|
||||
}
|
||||
}
|
||||
self.require(Token::Comma)?;
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@ use crate::error::{Error, ErrorKind};
|
|||
use crate::lexer::Token;
|
||||
use crate::variables::Abool;
|
||||
|
||||
use super::{item::Expr, Parser};
|
||||
use super::{Parser, item::{Iden, Item}};
|
||||
|
||||
pub fn abool2num(abool: Abool) -> i32 {
|
||||
match abool {
|
||||
|
|
@ -31,9 +31,9 @@ impl<'a> Parser<'a> {
|
|||
}
|
||||
|
||||
/// Require an identifier on next and return it
|
||||
pub(super) fn require_iden(&mut self) -> Result<String, Error> {
|
||||
pub(super) fn require_iden(&mut self) -> Result<Iden, Error> {
|
||||
if let Some(Token::Identifier(id)) = self.lexer.next() {
|
||||
Ok(id)
|
||||
Ok(Iden(id))
|
||||
} else {
|
||||
Err(Error {
|
||||
kind: ErrorKind::InvalidIdentifier,
|
||||
|
|
@ -58,7 +58,7 @@ impl<'a> Parser<'a> {
|
|||
}
|
||||
}
|
||||
|
||||
pub(super) fn parse_body(&mut self) -> Result<Vec<Expr>, Error> {
|
||||
pub(super) fn parse_body(&mut self) -> Result<Vec<Item>, Error> {
|
||||
let mut body = Vec::new();
|
||||
loop {
|
||||
let token = {
|
||||
|
|
@ -76,7 +76,7 @@ impl<'a> Parser<'a> {
|
|||
if token == Token::RightBrace {
|
||||
break;
|
||||
}
|
||||
body.push(self.parse_expr(Some(token))?);
|
||||
body.push(self.parse_item(Some(token))?);
|
||||
}
|
||||
Ok(body)
|
||||
}
|
||||
|
|
|
|||
30
src/repl.rs
Normal file
30
src/repl.rs
Normal file
|
|
@ -0,0 +1,30 @@
|
|||
use rustyline::Editor;
|
||||
|
||||
use crate::parser::Parser;
|
||||
|
||||
pub fn repl() {
|
||||
let mut rl = Editor::<()>::new();
|
||||
loop {
|
||||
let readline = rl.readline(":: ");
|
||||
match readline {
|
||||
Ok(line) => {
|
||||
if &line == "exit" {
|
||||
println!("bye");
|
||||
break;
|
||||
}
|
||||
let mut parser = Parser::new(&line);
|
||||
let ast = parser.init();
|
||||
println!("{:#?}", ast);
|
||||
}
|
||||
Err(rustyline::error::ReadlineError::Eof) => {
|
||||
println!("bye");
|
||||
break;
|
||||
}
|
||||
Err(rustyline::error::ReadlineError::Interrupted) => (),
|
||||
Err(e) => {
|
||||
println!("Error: {:?}", e);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue