initial commit

2023-12-30 15:42:23 -05:00 · 2023-12-30 15:42:23 -05:00 · 6824676cb2
commit 6824676cb2
9 changed files with 548 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+/target
--- a/Cargo.lock
+++ b/Cargo.lock
@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "fourth"
+version = "0.1.0"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -0,0 +1,8 @@
+[package]
+name = "fourth"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
--- a/src/backend.rs
+++ b/src/backend.rs
@ -0,0 +1,170 @@
+use std::collections::HashMap;
+use crate::parse::Parser;
+use crate::parse::TokenType::*;
+
+#[derive(Debug)]
+pub struct Vm {
+    stack:      Vec<u64>,
+    dictionary: Dictionary
+}
+
+#[derive(Debug, Default)]
+struct Dictionary {
+    dp:    u64,
+    data:  HashMap<u64, u64>,
+    words: HashMap<String, String>
+}
+
+impl<'a> Vm {
+    pub fn new() -> Self {
+	Self {
+	    stack: Vec::new(),
+	    dictionary: Default::default()
+	}
+    }
+    
+    pub fn vmrun(&mut self, parser: &mut Parser) {
+	macro_rules! unwrap {
+	    () => {
+		match self.stack.pop() {
+		    Some(v) => {
+			v
+		    },
+		    None => {
+			println!("ERROR: stack empty");
+			std::process::exit(1);
+		    }
+		}
+	    }
+	}
+
+	while let Some(item) = parser.next() {
+	    match item {
+		Number(n) => self.stack.push(n),
+		Word(w) => {
+		    match w {
+			"." => {
+			    println!("{:?} ok", unwrap!());
+			},
+			"+" => {
+			    let sum = unwrap!().wrapping_add(unwrap!());
+			    self.stack.push(sum);
+			},
+			"*" => {
+			    let prod = unwrap!().wrapping_mul(unwrap!());
+			    self.stack.push(prod);
+			},
+			"/" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let quo = stack_second.wrapping_div(stack_top);
+			    self.stack.push(quo);
+			},
+			"=" => {
+			    if unwrap!() == unwrap!() {
+				self.stack.push(1);
+			    } else {
+				self.stack.push(0);
+			    }
+			},
+			"MOD"|"mod" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let rem = stack_second.wrapping_rem(stack_top);
+			    self.stack.push(rem);
+			},
+			"TRACE"|"trace" => {
+			    match parser.inner_next() {
+				Some("stack") => {
+				    for item in &self.stack {
+					println!("{:?}", item);
+				    }
+				},
+				Some("data") => {
+				    println!("{:?}", self.dictionary.data);
+				},
+				Some("words") => {
+				    println!("{:?}", self.dictionary.words);
+				},
+
+				subcommand => {
+				    println!("Subcommand {:?} is not supported. Supported subcommands are stack or dataspace.", subcommand); 
+				}
+			    }
+			},
+			"/MOD"|"/mod" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let rem = stack_second.wrapping_rem(stack_top);
+			    let quo = stack_second.wrapping_div(stack_top);
+			    self.stack.push(rem);
+			    self.stack.push(quo);
+			},
+			"SWAP"|"swap" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    self.stack.push(stack_top);
+			    self.stack.push(stack_second);
+			},
+			"HERE"|"here" => {
+			    self.stack.push(self.dictionary.dp);
+			},
+			"@" => {
+			    let addr = unwrap!();
+			    self.stack.push(*self.dictionary.data.get(&addr).unwrap_or(&0));
+			},
+			"!" => {
+			    let addr = unwrap!();
+			    let content = unwrap!();
+			    self.dictionary.data.insert(addr, content);
+			},
+			"," => {
+			    let content = unwrap!();
+			    self.dictionary.dp += 1;
+			    self.dictionary.data.insert(self.dictionary.dp, content);
+			},
+			"ALLOT"|"allot" => {
+			    self.dictionary.dp += unwrap!();
+			},
+			"CREATE"|"create" => {
+			    self.dictionary.dp += 1;
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1) };
+			    self.dictionary.words.insert(word_name.to_string(), self.dictionary.dp.to_string());
+			},
+			"VARIABLE"|"variable" => {
+			    self.dictionary.dp += 1;
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1) };
+			    self.dictionary.words.insert(word_name.to_string(), self.dictionary.dp.to_string());
+			    
+			},
+			"DUP"|"dup" => {
+			    let stack_top = unwrap!();
+			    self.stack.push(stack_top);
+			    self.stack.push(stack_top);
+			},
+			":" => {
+			    let mut word_content = String::new();
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1); };
+			    let mut next = parser.inner_next();
+			    while next != Some(";") && next != None {
+				word_content.push_str(next.unwrap());
+				word_content.push_str(" ");
+				next = parser.inner_next();
+			    }
+
+			    self.dictionary.words.insert(word_name.to_string(), word_content);
+			},
+			word => {
+			    let words = self.dictionary.words.clone();
+			    let Some(word_content) = words.get(word) else {
+				println!("word {:?} does not exist", word);
+				std::process::exit(1);
+			    };
+			    self.vmrun(&mut Parser::new(word_content));
+			}
+		    }
+		}
+	    }
+	}
+    }
+}
--- a/src/backend.rs~
+++ b/src/backend.rs~
@ -0,0 +1,151 @@
+use std::collections::HashMap;
+use crate::parse::Parser;
+use crate::parse::TokenType::*;
+
+#[derive(Debug)]
+pub struct Vm {
+    stack:      Vec<u64>,
+    dictionary: Dictionary
+}
+
+#[derive(Debug, Default)]
+struct Dictionary {
+    dp:    u64,
+    data:  HashMap<u64, u64>,
+    words: HashMap<String, String>
+}
+
+impl<'a> Vm {
+    pub fn new() -> Self {
+	Self {
+	    stack: Vec::new(),
+	    dictionary: Default::default()
+	}
+    }
+    
+    pub fn vmrun(&mut self, parser: &mut Parser) {
+	macro_rules! unwrap {
+	    () => {
+		match self.stack.pop() {
+		    Some(v) => {
+			v
+		    },
+		    None => {
+			println!("ERROR: stack empty");
+			std::process::exit(1);
+		    }
+		}
+	    }
+	}
+
+	while let Some(item) = parser.next() {
+	    match item {
+		Number(n) => self.stack.push(n),
+		Word(w) => {
+		    match w {
+			"." => {
+			    println!("{:?} ok", unwrap!());
+			},
+			"+" => {
+			    let sum = unwrap!().wrapping_add(unwrap!());
+			    self.stack.push(sum);
+			},
+			"*" => {
+			    let prod = unwrap!().wrapping_mul(unwrap!());
+			    self.stack.push(prod);
+			},
+			"/" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let quo = stack_second.wrapping_div(stack_top);
+			    self.stack.push(quo);
+			},
+			"=" => {
+			    if unwrap!() == unwrap!() {
+				self.stack.push(1);
+			    } else {
+				self.stack.push(0);
+			    }
+			},
+			"MOD"|"mod" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let rem = stack_second.wrapping_rem(stack_top);
+			    self.stack.push(rem);
+			},
+			"/MOD"|"/mod" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    let rem = stack_second.wrapping_rem(stack_top);
+			    let quo = stack_second.wrapping_div(stack_top);
+			    self.stack.push(rem);
+			    self.stack.push(quo);
+			},
+			"SWAP"|"swap" => {
+			    let stack_top = unwrap!();
+			    let stack_second = unwrap!();
+			    self.stack.push(stack_top);
+			    self.stack.push(stack_second);
+			},
+			"HERE"|"here" => {
+			    self.stack.push(self.dictionary.dp);
+			},
+			"@" => {
+			    let addr = unwrap!();
+			    self.stack.push(*self.dictionary.data.get(&addr).unwrap_or(&0));
+			},
+			"!" => {
+			    let addr = unwrap!();
+			    let content = unwrap!();
+			    self.dictionary.data.insert(addr, content);
+			},
+			"," => {
+			    let content = unwrap!();
+			    self.dictionary.dp += 1;
+			    self.dictionary.data.insert(self.dictionary.dp, content);
+			},
+			"ALLOT"|"allot" => {
+			    self.dictionary.dp += unwrap!();
+			},
+			"CREATE"|"create" => {
+			    self.dictionary.dp += 1;
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1) };
+			    self.dictionary.words.insert(word_name.to_string(), self.dictionary.dp.to_string());
+			},
+			"VARIABLE"|"variable" => {
+			    self.dictionary.dp += 1;
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1) };
+			    self.dictionary.words.insert(word_name.to_string(), self.dictionary.dp.to_string());
+			    
+			},
+			"DUP"|"dup" => {
+			    let stack_top = unwrap!();
+			    self.stack.push(stack_top);
+			    self.stack.push(stack_top);
+			},
+			":" => {
+			    let mut word_content = String::new();
+			    let Some(Word(word_name)) = parser.next() else { println!("ERROR: Word name not given."); std::process::exit(1); };
+			    let mut next = parser.inner_next();
+			    while next != Some(";") && next != None {
+				word_content.push_str(next.unwrap());
+				word_content.push_str(" ");
+				next = parser.inner_next();
+			    }
+
+			    self.dictionary.words.insert(word_name.to_string(), word_content);
+			},
+			word => {
+			    let words = self.dictionary.words.clone();
+			    let Some(word_content) = words.get(word) else {
+				println!("word {:?} does not exist", word);
+				std::process::exit(1);
+			    };
+			    self.vmrun(&mut Parser::new(word_content));
+			}
+		    }
+		}
+	    }
+	}
+    }
+}
--- a/src/main.rs
+++ b/src/main.rs
@ -0,0 +1,19 @@
+use std::fs::read_to_string;
+pub mod parse;
+pub mod backend;
+use parse::Parser;
+use backend::Vm;
+
+fn main() -> std::io::Result<()> {
+    let mut args = std::env::args();
+    let command = args.next().unwrap();
+    if let Some(filename) = args.next() {
+	let contents = read_to_string(filename)?;
+	let contents = contents.as_str();
+	Vm::new().vmrun(&mut Parser::new(contents));
+    } else {
+	eprintln!("Usage: {} filename", command);
+	std::process::exit(1);
+    }
+    Ok(())
+}
--- a/src/parse.rs
+++ b/src/parse.rs
@ -0,0 +1,37 @@
+use std::str::SplitWhitespace;
+use TokenType::*;
+
+#[derive(Debug)]
+pub enum TokenType<'a> {
+    Number(u64),
+    Word(&'a str),
+}
+
+#[derive(Clone)]
+pub struct Parser<'a> {
+    pub(crate) split_whitespace: SplitWhitespace<'a>
+}
+
+impl<'a> Iterator for Parser<'a> {
+    type Item = TokenType<'a>;
+
+    fn next(&mut self) -> Option<TokenType<'a>> {
+	let item = self.split_whitespace.next()?;
+	if let Ok(number) = item.parse::<u64>() {
+	    return Some(Number(number));
+	} else {
+	    return Some(Word(item));
+	}	
+    }
+}
+
+impl<'a> Parser<'a> {
+    pub fn new(source: &'a str) -> Parser {
+        Parser {
+            split_whitespace: source.split_whitespace(),
+        }
+    }
+    pub fn inner_next(&mut self) -> Option<&'a str> {
+	self.split_whitespace.next()
+    }
+}
--- a/155
+++ b/155
@ -0,0 +1,155 @@
+!_TAG_EXTRA_DESCRIPTION	anonymous	/Include tags for non-named objects like lambda/
+!_TAG_EXTRA_DESCRIPTION	fileScope	/Include tags of file scope/
+!_TAG_EXTRA_DESCRIPTION	pseudo	/Include pseudo tags/
+!_TAG_EXTRA_DESCRIPTION	subparser	/Include tags generated by subparsers/
+!_TAG_FIELD_DESCRIPTION	epoch	/the last modified time of the input file (only for F\/file kind tag)/
+!_TAG_FIELD_DESCRIPTION	file	/File-restricted scoping/
+!_TAG_FIELD_DESCRIPTION	input	/input file/
+!_TAG_FIELD_DESCRIPTION	name	/tag name/
+!_TAG_FIELD_DESCRIPTION	pattern	/pattern/
+!_TAG_FIELD_DESCRIPTION	typeref	/Type and name of a variable or typedef/
+!_TAG_FILE_FORMAT	2	/extended format; --format=1 will not append ;" to lines/
+!_TAG_FILE_SORTED	1	/0=unsorted, 1=sorted, 2=foldcase/
+!_TAG_KIND_DESCRIPTION!D	M,module	/modules/
+!_TAG_KIND_DESCRIPTION!D	T,template	/templates/
+!_TAG_KIND_DESCRIPTION!D	V,version	/version statements/
+!_TAG_KIND_DESCRIPTION!D	X,mixin	/mixins/
+!_TAG_KIND_DESCRIPTION!D	a,alias	/aliases/
+!_TAG_KIND_DESCRIPTION!D	c,class	/classes/
+!_TAG_KIND_DESCRIPTION!D	e,enumerator	/enumerators (values inside an enumeration)/
+!_TAG_KIND_DESCRIPTION!D	f,function	/function definitions/
+!_TAG_KIND_DESCRIPTION!D	g,enum	/enumeration names/
+!_TAG_KIND_DESCRIPTION!D	i,interface	/interfaces/
+!_TAG_KIND_DESCRIPTION!D	m,member	/class, struct, and union members/
+!_TAG_KIND_DESCRIPTION!D	n,namespace	/namespaces/
+!_TAG_KIND_DESCRIPTION!D	s,struct	/structure names/
+!_TAG_KIND_DESCRIPTION!D	u,union	/union names/
+!_TAG_KIND_DESCRIPTION!D	v,variable	/variable definitions/
+!_TAG_KIND_DESCRIPTION!JSON	a,array	/arrays/
+!_TAG_KIND_DESCRIPTION!JSON	b,boolean	/booleans/
+!_TAG_KIND_DESCRIPTION!JSON	n,number	/numbers/
+!_TAG_KIND_DESCRIPTION!JSON	o,object	/objects/
+!_TAG_KIND_DESCRIPTION!JSON	s,string	/strings/
+!_TAG_KIND_DESCRIPTION!JSON	z,null	/nulls/
+!_TAG_KIND_DESCRIPTION!Rust	C,constant	/A constant/
+!_TAG_KIND_DESCRIPTION!Rust	M,macro	/Macro Definition/
+!_TAG_KIND_DESCRIPTION!Rust	P,method	/A method/
+!_TAG_KIND_DESCRIPTION!Rust	c,implementation	/implementation/
+!_TAG_KIND_DESCRIPTION!Rust	e,enumerator	/An enum variant/
+!_TAG_KIND_DESCRIPTION!Rust	f,function	/Function/
+!_TAG_KIND_DESCRIPTION!Rust	g,enum	/Enum/
+!_TAG_KIND_DESCRIPTION!Rust	i,interface	/trait interface/
+!_TAG_KIND_DESCRIPTION!Rust	m,field	/A struct field/
+!_TAG_KIND_DESCRIPTION!Rust	n,module	/module/
+!_TAG_KIND_DESCRIPTION!Rust	s,struct	/structural type/
+!_TAG_KIND_DESCRIPTION!Rust	t,typedef	/Type Alias/
+!_TAG_KIND_DESCRIPTION!Rust	v,variable	/Global variable/
+!_TAG_OUTPUT_EXCMD	mixed	/number, pattern, mixed, or combineV2/
+!_TAG_OUTPUT_FILESEP	slash	/slash or backslash/
+!_TAG_OUTPUT_MODE	u-ctags	/u-ctags or e-ctags/
+!_TAG_OUTPUT_VERSION	0.0	/current.age/
+!_TAG_PARSER_VERSION!D	0.0	/current.age/
+!_TAG_PARSER_VERSION!JSON	0.0	/current.age/
+!_TAG_PARSER_VERSION!Rust	0.0	/current.age/
+!_TAG_PATTERN_LENGTH_LIMIT	96	/0 for no limit/
+!_TAG_PROC_CWD	/home/goren/Code/fourth/	//
+!_TAG_PROGRAM_AUTHOR	Universal Ctags Team	//
+!_TAG_PROGRAM_NAME	Universal Ctags	/Derived from Exuberant Ctags/
+!_TAG_PROGRAM_URL	https://ctags.io/	/official site/
+!_TAG_PROGRAM_VERSION	6.0.0	/p6.0.20221218.0/
+0	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	o	array:local
+0	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	o	array:local
+0	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	o	array:local
+0	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	o	array:local
+15729799797837862367	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	o	object:outputs
+4614504638168534921	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	o	object:outputs
+CheckDepInfo	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	o	object:local.0
+CheckDepInfo	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	o	object:local.0
+CheckDepInfo	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	o	object:local.0
+CheckDepInfo	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	o	object:local.0
+Dictionary	src/backend.rs	/^struct Dictionary {$/;"	s
+Item	src/parse.rs	/^    type Item = TokenType<'a>;$/;"	t	implementation:Parser
+Number	src/parse.rs	/^    Number(u64),$/;"	e	enum:TokenType
+Parser	src/parse.rs	/^impl<'a> Iterator for Parser<'a> {$/;"	c
+Parser	src/parse.rs	/^impl<'a> Parser<'a> {$/;"	c
+Parser	src/parse.rs	/^pub struct Parser<'a> {$/;"	s
+TokenType	src/parse.rs	/^pub enum TokenType<'a> {$/;"	g
+Vm	src/backend.rs	/^impl<'a> Vm {$/;"	c
+Vm	src/backend.rs	/^pub struct Vm {$/;"	s
+Word	src/parse.rs	/^    Word(&'a str),$/;"	e	enum:TokenType
+backend	src/main.rs	/^pub mod backend;$/;"	n
+code	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	n	object:outputs.15729799797837862367
+code	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	n	object:outputs.4614504638168534921
+compile_kind	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+compile_kind	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+compile_kind	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+compile_kind	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+config	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+config	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+config	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+config	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+data	src/backend.rs	/^    data:  HashMap<u64, u64>,$/;"	m	struct:Dictionary
+dep_info	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	s	object:local.0.CheckDepInfo
+dep_info	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	s	object:local.0.CheckDepInfo
+dep_info	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	s	object:local.0.CheckDepInfo
+dep_info	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	s	object:local.0.CheckDepInfo
+deps	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	a
+deps	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	a
+deps	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	a
+deps	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	a
+dictionary	src/backend.rs	/^    dictionary: Dictionary$/;"	m	struct:Vm
+dp	src/backend.rs	/^    dp:    u64,$/;"	m	struct:Dictionary
+features	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	s
+features	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	s
+features	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	s
+features	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	s
+inner_next	src/parse.rs	/^    pub fn inner_next(&mut self) -> Option<&'a str> {$/;"	P	implementation:Parser
+local	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	a
+local	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	a
+local	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	a
+local	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	a
+main	src/main.rs	/^fn main() -> std::io::Result<()> {$/;"	f
+metadata	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+metadata	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+metadata	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+metadata	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+new	src/backend.rs	/^    pub fn new() -> Self {$/;"	P	implementation:Vm
+new	src/parse.rs	/^    pub fn new(source: &'a str) -> Parser {$/;"	P	implementation:Parser
+next	src/parse.rs	/^    fn next(&mut self) -> Option<TokenType<'a>> {$/;"	P	implementation:Parser
+outputs	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	o
+parse	src/main.rs	/^pub mod parse;$/;"	n
+path	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+path	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+path	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+path	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+profile	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+profile	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+profile	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+profile	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+rustc	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+rustc	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+rustc	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+rustc	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+rustc_fingerprint	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	n
+rustflags	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	a
+rustflags	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	a
+rustflags	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	a
+rustflags	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	a
+split_whitespace	src/parse.rs	/^    pub(crate) split_whitespace: SplitWhitespace<'a>$/;"	m	struct:Parser
+stack	src/backend.rs	/^    stack:      Vec<u64>,$/;"	m	struct:Vm
+status	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.15729799797837862367
+status	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.4614504638168534921
+stderr	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.15729799797837862367
+stderr	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.4614504638168534921
+stdout	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.15729799797837862367
+stdout	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	s	object:outputs.4614504638168534921
+success	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	b	object:outputs.15729799797837862367
+success	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	b	object:outputs.4614504638168534921
+successes	target/.rustc_info.json	/^{"rustc_fingerprint":15313746258697816560,"outputs":{"15729799797837862367":{"success":true,"sta/;"	o
+target	target/debug/.fingerprint/fourth-0eb22537b83d0b36/test-bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":183265222628/;"	n
+target	target/debug/.fingerprint/fourth-c58712c3665fe72a/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":110397424744/;"	n
+target	target/debug/.fingerprint/fourth-d5bfd771d6ea8237/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":131263742483/;"	n
+target	target/release/.fingerprint/fourth-96ade2603d15be13/bin-fourth.json	/^{"rustc":3462548589188548201,"features":"[]","target":6449572106981162502,"profile":356732962844/;"	n
+unwrap	src/backend.rs	/^	macro_rules! unwrap {$/;"	M	method:Vm::vmrun
+vmrun	src/backend.rs	/^    pub fn vmrun(&mut self, parser: &mut Parser) {$/;"	P	implementation:Vm
+words	src/backend.rs	/^    words: HashMap<String, String>$/;"	m	struct:Dictionary
--- a/test.fourth
+++ b/test.fourth