@ -1,26 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def read(x) | |||
x | |||
end | |||
def eval(x) | |||
x | |||
end | |||
def print(x) | |||
x | |||
end | |||
def rep(x) | |||
read(eval(print(x))) | |||
end | |||
while line = my_readline("user> ") | |||
puts rep(line) | |||
end |
@ -1,32 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def read(str) | |||
read_str str | |||
end | |||
def eval(x) | |||
x | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str))) | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,90 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def eval_error(msg) | |||
raise Mal::EvalException.new msg | |||
end | |||
def num_func(func) | |||
-> (args : Array(Mal::Type)) { | |||
x, y = args[0].unwrap, args[1].unwrap | |||
eval_error "invalid arguments" unless x.is_a?(Int32) && y.is_a?(Int32) | |||
Mal::Type.new func.call(x, y) | |||
} | |||
end | |||
$repl_env = { | |||
"+" => num_func(->(x : Int32, y : Int32){ x + y }), | |||
"-" => num_func(->(x : Int32, y : Int32){ x - y }), | |||
"*" => num_func(->(x : Int32, y : Int32){ x * y }), | |||
"/" => num_func(->(x : Int32, y : Int32){ x / y }), | |||
} of String => Mal::Func | |||
def eval_ast(a, env) | |||
return a.map{|n| eval(n, env) as Mal::Type} if a.is_a? Mal::List | |||
return a unless a | |||
ast = a.unwrap | |||
case ast | |||
when Mal::Symbol | |||
if env.has_key? ast.str | |||
env[ast.str] | |||
else | |||
eval_error "'#{ast.str}' not found" | |||
end | |||
when Mal::List | |||
ast.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
ast.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Mal::HashMap | |||
ast.each{|k, v| ast[k] = eval(v, env)} | |||
else | |||
ast | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
def eval(t, env) | |||
Mal::Type.new case ast = t.unwrap | |||
when Mal::List | |||
eval_error "empty list" if ast.empty? | |||
f = eval_ast(ast.first, env) | |||
ast.shift(1) | |||
args = eval_ast(ast, env) | |||
if f.is_a?(Mal::Func) | |||
f.call(args) | |||
else | |||
eval_error "expected function symbol as the first symbol of list" | |||
end | |||
else | |||
eval_ast(t, env) | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,115 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def eval_error(msg) | |||
raise Mal::EvalException.new msg | |||
end | |||
def num_func(func) | |||
-> (args : Array(Mal::Type)) { | |||
x, y = args[0].unwrap, args[1].unwrap | |||
eval_error "invalid arguments" unless x.is_a?(Int32) && y.is_a?(Int32) | |||
Mal::Type.new func.call(x, y) | |||
} | |||
end | |||
$repl_env = Mal::Env.new nil | |||
$repl_env.set("+", Mal::Type.new num_func(->(x : Int32, y : Int32){ x + y })) | |||
$repl_env.set("-", Mal::Type.new num_func(->(x : Int32, y : Int32){ x - y })) | |||
$repl_env.set("*", Mal::Type.new num_func(->(x : Int32, y : Int32){ x * y })) | |||
$repl_env.set("/", Mal::Type.new num_func(->(x : Int32, y : Int32){ x / y })) | |||
def eval_ast(a, env) | |||
return a.map{|n| eval(n, env) } if a.is_a? Array | |||
Mal::Type.new case ast = a.unwrap | |||
when Mal::Symbol | |||
if e = env.get(ast.str) | |||
e | |||
else | |||
eval_error "'#{ast.str}' not found" | |||
end | |||
when Mal::List | |||
ast.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
ast.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Mal::HashMap | |||
new_map = Mal::HashMap.new | |||
ast.each{|k, v| new_map[k] = eval(v, env)} | |||
new_map | |||
else | |||
ast | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
def eval(t, env) | |||
ast = t.unwrap | |||
return eval_ast(t, env) unless ast.is_a?(Mal::List) | |||
eval_error "empty list" if ast.empty? | |||
sym = ast.first.unwrap | |||
eval_error "first element of list must be a symbol" unless sym.is_a?(Mal::Symbol) | |||
Mal::Type.new case sym.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless ast.size == 3 | |||
a1 = ast[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol" unless a1.is_a?(Mal::Symbol) | |||
env.set(a1.str, eval(ast[2], env) as Mal::Type) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless ast.size == 3 | |||
bindings = ast[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a?(Array) | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
name, value = binding[0].unwrap, binding[1] | |||
eval_error "name of binding must be specified as symbol" unless name.is_a?(Mal::Symbol) | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
eval(ast[2], new_env) | |||
else | |||
f = eval_ast(ast.first, env) | |||
ast.shift(1) | |||
args = eval_ast(ast, env) | |||
if f.is_a?(Mal::Type) && (f2 = f.unwrap).is_a?(Mal::Func) | |||
f2.call(args as Array(Mal::Type)) | |||
else | |||
eval_error "expected function symbol as the first symbol of list" | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,130 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def eval_invocation(list, env) | |||
f = eval(list.first, env).unwrap | |||
eval_error "expected function symbol as the first symbol of list" unless f.is_a? Mal::Func | |||
f.call eval_ast(list[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
def eval(ast, env) | |||
list = ast.unwrap | |||
return eval_ast(ast, env) unless list.is_a? Mal::List | |||
return gen_type Mal::List if list.empty? | |||
head = list.first.unwrap | |||
Mal::Type.new case head | |||
when Mal::Symbol | |||
case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
eval(list[2], new_env) | |||
when "do" | |||
list.shift 1 | |||
eval_ast(list, env).last | |||
when "if" | |||
cond = eval(list[1], env).unwrap | |||
case cond | |||
when Nil | |||
list.size >= 4 ? eval(list[3], env) : nil | |||
when false | |||
list.size >= 4 ? eval(list[3], env) : nil | |||
else | |||
eval(list[2], env) | |||
end | |||
when "fn*" | |||
# Note: | |||
# If writing lambda expression here directly, compiler will fail to infer type of 'list'. (Error 'Nil for empty?') | |||
func_of(env, list[1].unwrap, list[2]) | |||
else | |||
eval_invocation(list, env) | |||
end | |||
else | |||
eval_invocation(list, env) | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,164 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Array(Mal::Type) | |||
val.map{|n| eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def eval_invocation(list, env) | |||
f = eval(list.first, env).unwrap | |||
case f | |||
when Mal::Closure | |||
f.fn.call eval_ast(list[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
when Mal::Func | |||
f.call eval_ast(list[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
else | |||
eval_error "expected function as the first argument" | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
macro invoke_list(l) | |||
f = eval({{l}}.first, env).unwrap | |||
args = eval_ast({{l}}[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
case f | |||
when Mal::Closure | |||
ast = f.ast | |||
env = Mal::Env.new(f.env, f.params, args) | |||
next # TCO | |||
when Mal::Func | |||
return f.call args | |||
else | |||
eval_error "expected function as the first argument" | |||
end | |||
end | |||
def eval(ast, env) | |||
# 'next' in 'do...end' has a bug in crystal 0.7.1 | |||
# https://github.com/manastech/crystal/issues/659 | |||
while true | |||
list = ast.unwrap | |||
return eval_ast(ast, env) unless list.is_a? Mal::List | |||
return gen_type Mal::List if list.empty? | |||
head = list.first.unwrap | |||
unless head.is_a? Mal::Symbol | |||
invoke_list list | |||
end | |||
return Mal::Type.new case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
ast, env = list[2], new_env | |||
next # TCO | |||
when "do" | |||
if list.empty? | |||
ast = Mal::Type.new nil | |||
next | |||
end | |||
eval_ast(list[1..-2].each_with_object(Mal::List.new){|i,l| l << i}, env) | |||
ast = list.last | |||
next # TCO | |||
when "if" | |||
ast = unless eval(list[1], env).unwrap | |||
list.size >= 4 ? list[3] : Mal::Type.new(nil) | |||
else | |||
list[2] | |||
end | |||
next # TCO | |||
when "fn*" | |||
# Note: | |||
# If writing lambda expression here directly, compiler will fail to infer type of 'list'. (Error 'Nil for empty?') | |||
params = list[1].unwrap | |||
unless params.is_a?(Mal::List) || params.is_a?(Mal::Vector) | |||
eval_error "'fn*' parameters must be list" | |||
end | |||
Mal::Closure.new(list[2], params, env, func_of(env, list[1].unwrap, list[2])) | |||
else | |||
invoke_list list | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,177 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Array(Mal::Type) | |||
val.map{|n| eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def eval_invocation(list, env) | |||
f = eval(list.first, env).unwrap | |||
case f | |||
when Mal::Closure | |||
f.fn.call eval_ast(list[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
when Mal::Func | |||
f.call eval_ast(list[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, env) | |||
else | |||
eval_error "expected function as the first argument" | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
macro invoke_list(l, env) | |||
f = eval({{l}}.first, {{env}}).unwrap | |||
args = eval_ast({{l}}[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, {{env}}) | |||
case f | |||
when Mal::Closure | |||
ast = f.ast | |||
{{env}} = Mal::Env.new(f.env, f.params, args) | |||
next # TCO | |||
when Mal::Func | |||
return f.call args | |||
else | |||
eval_error "expected function as the first argument" | |||
end | |||
end | |||
def eval(ast, env) | |||
# 'next' in 'do...end' has a bug in crystal 0.7.1 | |||
# https://github.com/manastech/crystal/issues/659 | |||
while true | |||
list = ast.unwrap | |||
return eval_ast(ast, env) unless list.is_a? Mal::List | |||
return gen_type Mal::List if list.empty? | |||
head = list.first.unwrap | |||
unless head.is_a? Mal::Symbol | |||
invoke_list(list, env) | |||
end | |||
return Mal::Type.new case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
ast, env = list[2], new_env | |||
next # TCO | |||
when "do" | |||
if list.empty? | |||
ast = Mal::Type.new nil | |||
next | |||
end | |||
eval_ast(list[1..-2].each_with_object(Mal::List.new){|i,l| l << i}, env) | |||
ast = list.last | |||
next # TCO | |||
when "if" | |||
ast = unless eval(list[1], env).unwrap | |||
list.size >= 4 ? list[3] : Mal::Type.new(nil) | |||
else | |||
list[2] | |||
end | |||
next # TCO | |||
when "fn*" | |||
params = list[1].unwrap | |||
unless params.is_a?(Mal::List) || params.is_a?(Mal::Vector) | |||
eval_error "'fn*' parameters must be list" | |||
end | |||
Mal::Closure.new(list[2], params, env, func_of(env, params, list[2])) | |||
else | |||
invoke_list(list, env) | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
$repl_env.set("eval", Mal::Type.new -> (args: Array(Mal::Type)){ eval(args[0], $repl_env) }) | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
rep "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))" | |||
$argv = Mal::List.new | |||
$repl_env.set("*ARGV*", Mal::Type.new $argv) | |||
unless ARGV.empty? | |||
if ARGV.size > 1 | |||
ARGV[1..-1].each do |a| | |||
$argv << Mal::Type.new(a) | |||
end | |||
end | |||
rep "(load-file \"#{ARGV[0]}\")" | |||
exit | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,207 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Array(Mal::Type) | |||
val.map{|n| eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
macro is_pair(list) | |||
{{list}}.is_a?(Array) && !{{list}}.empty? | |||
end | |||
def quasiquote(ast) | |||
list = ast.unwrap | |||
unless is_pair(list) | |||
return Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "quote") << ast | |||
) | |||
end | |||
head = list.first.unwrap | |||
case | |||
# ("unquote" ...) | |||
when head.is_a?(Mal::Symbol) && head.str == "unquote" | |||
list[1] | |||
# (("splice-unquote" ...) ...) | |||
when is_pair(head) && (arg0 = head.first.unwrap).is_a?(Mal::Symbol) && arg0.str == "splice-unquote" | |||
tail = Mal::Type.new list[1..-1].each_with_object(Mal::List.new){|e,l| l << e} | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "concat") << head[1] << quasiquote(tail) | |||
) | |||
else | |||
tail = Mal::Type.new list[1..-1].each_with_object(Mal::List.new){|e,l| l << e} | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "cons") << quasiquote(list.first) << quasiquote(tail) | |||
) | |||
end | |||
end | |||
macro invoke_list(l, env) | |||
f = eval({{l}}.first, {{env}}).unwrap | |||
args = eval_ast({{l}}[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, {{env}}) | |||
case f | |||
when Mal::Closure | |||
ast = f.ast | |||
{{env}} = Mal::Env.new(f.env, f.params, args) | |||
next # TCO | |||
when Mal::Func | |||
return f.call args | |||
else | |||
eval_error "expected function as the first argument" | |||
end | |||
end | |||
def eval(ast, env) | |||
# 'next' in 'do...end' has a bug in crystal 0.7.1 | |||
# https://github.com/manastech/crystal/issues/659 | |||
while true | |||
list = ast.unwrap | |||
return eval_ast(ast, env) unless list.is_a? Mal::List | |||
return gen_type Mal::List if list.empty? | |||
head = list.first.unwrap | |||
unless head.is_a? Mal::Symbol | |||
return invoke_list(list, env) | |||
end | |||
return Mal::Type.new case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
ast, env = list[2], new_env | |||
next # TCO | |||
when "do" | |||
if list.empty? | |||
ast = Mal::Type.new nil | |||
next | |||
end | |||
eval_ast(list[1..-2].each_with_object(Mal::List.new){|i,l| l << i}, env) | |||
ast = list.last | |||
next # TCO | |||
when "if" | |||
ast = unless eval(list[1], env).unwrap | |||
list.size >= 4 ? list[3] : Mal::Type.new(nil) | |||
else | |||
list[2] | |||
end | |||
next # TCO | |||
when "fn*" | |||
params = list[1].unwrap | |||
unless params.is_a?(Mal::List) || params.is_a?(Mal::Vector) | |||
eval_error "'fn*' parameters must be list" | |||
end | |||
Mal::Closure.new(list[2], params, env, func_of(env, params, list[2])) | |||
when "quote" | |||
list[1] | |||
when "quasiquote" | |||
ast = quasiquote list[1] | |||
next # TCO | |||
else | |||
invoke_list(list, env) | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
$repl_env.set("eval", Mal::Type.new -> (args: Array(Mal::Type)){ eval(args[0], $repl_env) }) | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
rep "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))" | |||
$argv = Mal::List.new | |||
$repl_env.set("*ARGV*", Mal::Type.new $argv) | |||
unless ARGV.empty? | |||
if ARGV.size > 1 | |||
ARGV[1..-1].each do |a| | |||
$argv << Mal::Type.new(a) | |||
end | |||
end | |||
begin | |||
rep "(load-file \"#{ARGV[0]}\")" | |||
rescue e | |||
STDERR.puts e | |||
end | |||
exit | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,253 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Array(Mal::Type) | |||
val.map{|n| eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
macro pair?(list) | |||
{{list}}.is_a?(Array) && !{{list}}.empty? | |||
end | |||
def quasiquote(ast) | |||
list = ast.unwrap | |||
unless pair?(list) | |||
return Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "quote") << ast | |||
) | |||
end | |||
head = list.first.unwrap | |||
case | |||
# ("unquote" ...) | |||
when head.is_a?(Mal::Symbol) && head.str == "unquote" | |||
list[1] | |||
# (("splice-unquote" ...) ...) | |||
when pair?(head) && (arg0 = head.first.unwrap).is_a?(Mal::Symbol) && arg0.str == "splice-unquote" | |||
tail = Mal::Type.new list[1..-1].each_with_object(Mal::List.new){|e,l| l << e} | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "concat") << head[1] << quasiquote(tail) | |||
) | |||
else | |||
tail = Mal::Type.new list[1..-1].each_with_object(Mal::List.new){|e,l| l << e} | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "cons") << quasiquote(list.first) << quasiquote(tail) | |||
) | |||
end | |||
end | |||
def macro_call?(ast, env) | |||
list = ast.unwrap | |||
return false unless list.is_a? Mal::List | |||
sym = list.first.unwrap | |||
return false unless sym.is_a? Mal::Symbol | |||
func = env.find(sym.str).try(&.data[sym.str]) | |||
return false unless func && func.macro? | |||
true | |||
end | |||
def macroexpand(ast, env) | |||
while macro_call?(ast, env) | |||
# Already checked in macro_call? | |||
list = ast.unwrap as Mal::List | |||
func_sym = list[0].unwrap as Mal::Symbol | |||
func = env.get(func_sym.str).unwrap | |||
case func | |||
when Mal::Func | |||
ast = func.call(list[1..-1]) | |||
when Mal::Closure | |||
ast = func.fn.call(list[1..-1]) | |||
else | |||
eval_error "macro '#{func_sym.str}' must be function: #{ast}" | |||
end | |||
end | |||
ast | |||
end | |||
macro invoke_list(l, env) | |||
f = eval({{l}}.first, {{env}}).unwrap | |||
args = eval_ast({{l}}[1..-1].each_with_object(Mal::List.new){|i, l| l << i}, {{env}}) | |||
case f | |||
when Mal::Closure | |||
ast = f.ast | |||
{{env}} = Mal::Env.new(f.env, f.params, args) | |||
next # TCO | |||
when Mal::Func | |||
return f.call args | |||
else | |||
eval_error "expected function as the first argument: #{f}" | |||
end | |||
end | |||
def eval(ast, env) | |||
# 'next' in 'do...end' has a bug in crystal 0.7.1 | |||
# https://github.com/manastech/crystal/issues/659 | |||
while true | |||
return eval_ast(ast, env) unless ast.unwrap.is_a? Mal::List | |||
ast = macroexpand(ast, env) | |||
list = ast.unwrap | |||
return ast unless list.is_a? Mal::List | |||
return ast if list.empty? | |||
head = list.first.unwrap | |||
return invoke_list(list, env) unless head.is_a? Mal::Symbol | |||
return Mal::Type.new case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol: #{a1}" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol #{name}" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
ast, env = list[2], new_env | |||
next # TCO | |||
when "do" | |||
if list.empty? | |||
ast = Mal::Type.new nil | |||
next | |||
end | |||
eval_ast(list[1..-2].each_with_object(Mal::List.new){|i,l| l << i}, env) | |||
ast = list.last | |||
next # TCO | |||
when "if" | |||
ast = unless eval(list[1], env).unwrap | |||
list.size >= 4 ? list[3] : Mal::Type.new(nil) | |||
else | |||
list[2] | |||
end | |||
next # TCO | |||
when "fn*" | |||
params = list[1].unwrap | |||
unless params.is_a? Array | |||
eval_error "'fn*' parameters must be list or vector: #{params}" | |||
end | |||
Mal::Closure.new(list[2], params, env, func_of(env, params, list[2])) | |||
when "quote" | |||
list[1] | |||
when "quasiquote" | |||
ast = quasiquote list[1] | |||
next # TCO | |||
when "defmacro!" | |||
eval_error "wrong number of argument for 'defmacro!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'defmacro!' must be symbol: #{a1}" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env).tap{|n| n.is_macro = true}) | |||
when "macroexpand" | |||
macroexpand(list[1], env) | |||
else | |||
invoke_list(list, env) | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
$repl_env.set("eval", Mal::Type.new -> (args: Array(Mal::Type)){ eval(args[0], $repl_env) }) | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
rep "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))" | |||
rep "(defmacro! cond (fn* (& xs) (if (> (count xs) 0) (list 'if (first xs) (if (> (count xs) 1) (nth xs 1) (throw \"odd number of forms to cond\")) (cons 'cond (rest (rest xs)))))))" | |||
rep "(defmacro! or (fn* (& xs) (if (empty? xs) nil (if (= 1 (count xs)) (first xs) `(let* (or_FIXME ~(first xs)) (if or_FIXME or_FIXME (or ~@(rest xs))))))))" | |||
$argv = Mal::List.new | |||
$repl_env.set("*ARGV*", Mal::Type.new $argv) | |||
unless ARGV.empty? | |||
if ARGV.size > 1 | |||
ARGV[1..-1].each do |a| | |||
$argv << Mal::Type.new(a) | |||
end | |||
end | |||
begin | |||
rep "(load-file \"#{ARGV[0]}\")" | |||
rescue e | |||
STDERR.puts e | |||
end | |||
exit | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |
@ -1,270 +0,0 @@ | |||
#! /usr/bin/env crystal run | |||
require "./readline" | |||
require "./reader" | |||
require "./printer" | |||
require "./types" | |||
require "./env" | |||
require "./core" | |||
require "./error" | |||
# Note: | |||
# Employed downcase names because Crystal prohibits uppercase names for methods | |||
def func_of(env, binds, body) | |||
-> (args : Array(Mal::Type)) { | |||
new_env = Mal::Env.new(env, binds, args) | |||
eval(body, new_env) | |||
} as Mal::Func | |||
end | |||
def eval_ast(ast, env) | |||
return ast.map{|n| eval(n, env) as Mal::Type} if ast.is_a? Mal::List | |||
val = ast.unwrap | |||
Mal::Type.new case val | |||
when Mal::Symbol | |||
if e = env.get(val.str) | |||
e | |||
else | |||
eval_error "'#{val.str}' not found" | |||
end | |||
when Mal::List | |||
val.each_with_object(Mal::List.new){|n, l| l << eval(n, env)} | |||
when Mal::Vector | |||
val.each_with_object(Mal::Vector.new){|n, l| l << eval(n, env)} | |||
when Array(Mal::Type) | |||
val.map{|n| eval(n, env)} | |||
when Mal::HashMap | |||
val.each{|k, v| val[k] = eval(v, env)} | |||
val | |||
else | |||
val | |||
end | |||
end | |||
def read(str) | |||
read_str str | |||
end | |||
macro pair?(list) | |||
{{list}}.is_a?(Array) && !{{list}}.empty? | |||
end | |||
def quasiquote(ast) | |||
list = ast.unwrap | |||
unless pair?(list) | |||
return Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "quote") << ast | |||
) | |||
end | |||
head = list.first.unwrap | |||
case | |||
# ("unquote" ...) | |||
when head.is_a?(Mal::Symbol) && head.str == "unquote" | |||
list[1] | |||
# (("splice-unquote" ...) ...) | |||
when pair?(head) && (arg0 = head.first.unwrap).is_a?(Mal::Symbol) && arg0.str == "splice-unquote" | |||
tail = Mal::Type.new list[1..-1].to_mal | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "concat") << head[1] << quasiquote(tail) | |||
) | |||
else | |||
tail = Mal::Type.new list[1..-1].to_mal | |||
Mal::Type.new( | |||
Mal::List.new << gen_type(Mal::Symbol, "cons") << quasiquote(list.first) << quasiquote(tail) | |||
) | |||
end | |||
end | |||
def macro_call?(ast, env) | |||
list = ast.unwrap | |||
return false unless list.is_a? Mal::List | |||
sym = list.first.unwrap | |||
return false unless sym.is_a? Mal::Symbol | |||
func = env.find(sym.str).try(&.data[sym.str]) | |||
return false unless func && func.macro? | |||
true | |||
end | |||
def macroexpand(ast, env) | |||
while macro_call?(ast, env) | |||
# Already checked in macro_call? | |||
list = ast.unwrap as Mal::List | |||
func_sym = list[0].unwrap as Mal::Symbol | |||
func = env.get(func_sym.str).unwrap | |||
case func | |||
when Mal::Func | |||
ast = func.call(list[1..-1]) | |||
when Mal::Closure | |||
ast = func.fn.call(list[1..-1]) | |||
else | |||
eval_error "macro '#{func_sym.str}' must be function: #{ast}" | |||
end | |||
end | |||
ast | |||
end | |||
macro invoke_list(l, env) | |||
f = eval({{l}}.first, {{env}}).unwrap | |||
args = eval_ast({{l}}[1..-1].to_mal, {{env}}) | |||
case f | |||
when Mal::Closure | |||
ast = f.ast | |||
{{env}} = Mal::Env.new(f.env, f.params, args) | |||
next # TCO | |||
when Mal::Func | |||
return f.call args | |||
else | |||
eval_error "expected function as the first argument: #{f}" | |||
end | |||
end | |||
def eval(ast, env) | |||
# 'next' in 'do...end' has a bug in crystal 0.7.1 | |||
# https://github.com/manastech/crystal/issues/659 | |||
while true | |||
return eval_ast(ast, env) unless ast.unwrap.is_a? Mal::List | |||
ast = macroexpand(ast, env) | |||
list = ast.unwrap | |||
return ast unless list.is_a? Mal::List | |||
return ast if list.empty? | |||
head = list.first.unwrap | |||
return invoke_list(list, env) unless head.is_a? Mal::Symbol | |||
return Mal::Type.new case head.str | |||
when "def!" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'def!' must be symbol: #{a1}" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env)) | |||
when "let*" | |||
eval_error "wrong number of argument for 'def!'" unless list.size == 3 | |||
bindings = list[1].unwrap | |||
eval_error "1st argument of 'let*' must be list or vector" unless bindings.is_a? Array | |||
eval_error "size of binding list must be even" unless bindings.size.even? | |||
new_env = Mal::Env.new env | |||
bindings.each_slice(2) do |binding| | |||
key, value = binding | |||
name = key.unwrap | |||
eval_error "name of binding must be specified as symbol #{name}" unless name.is_a? Mal::Symbol | |||
new_env.set(name.str, eval(value, new_env)) | |||
end | |||
ast, env = list[2], new_env | |||
next # TCO | |||
when "do" | |||
if list.empty? | |||
ast = Mal::Type.new nil | |||
next | |||
end | |||
eval_ast(list[1..-2].to_mal, env) | |||
ast = list.last | |||
next # TCO | |||
when "if" | |||
ast = unless eval(list[1], env).unwrap | |||
list.size >= 4 ? list[3] : Mal::Type.new(nil) | |||
else | |||
list[2] | |||
end | |||
next # TCO | |||
when "fn*" | |||
params = list[1].unwrap | |||
unless params.is_a? Array | |||
eval_error "'fn*' parameters must be list or vector: #{params}" | |||
end | |||
Mal::Closure.new(list[2], params, env, func_of(env, params, list[2])) | |||
when "quote" | |||
list[1] | |||
when "quasiquote" | |||
ast = quasiquote list[1] | |||
next # TCO | |||
when "defmacro!" | |||
eval_error "wrong number of argument for 'defmacro!'" unless list.size == 3 | |||
a1 = list[1].unwrap | |||
eval_error "1st argument of 'defmacro!' must be symbol: #{a1}" unless a1.is_a? Mal::Symbol | |||
env.set(a1.str, eval(list[2], env).tap{|n| n.is_macro = true}) | |||
when "macroexpand" | |||
macroexpand(list[1], env) | |||
when "try*" | |||
catch_list = list[2].unwrap | |||
return eval(list[1], env) unless catch_list.is_a? Mal::List | |||
catch_head = catch_list.first.unwrap | |||
return eval(list[1], env) unless catch_head.is_a? Mal::Symbol | |||
return eval(list[1], env) unless catch_head.str == "catch*" | |||
begin | |||
eval(list[1], env) | |||
rescue e : Mal::RuntimeException | |||
new_env = Mal::Env.new(env, [catch_list[1]], [e.thrown]) | |||
eval(catch_list[2], new_env) | |||
rescue e | |||
new_env = Mal::Env.new(env, [catch_list[1]], [Mal::Type.new e.message]) | |||
eval(catch_list[2], new_env) | |||
end | |||
else | |||
invoke_list(list, env) | |||
end | |||
end | |||
end | |||
def print(result) | |||
pr_str(result, true) | |||
end | |||
def rep(str) | |||
print(eval(read(str), $repl_env)) | |||
end | |||
$repl_env = Mal::Env.new nil | |||
Mal::NS.each{|k,v| $repl_env.set(k, Mal::Type.new(v))} | |||
$repl_env.set("eval", Mal::Type.new -> (args: Array(Mal::Type)){ eval(args[0], $repl_env) }) | |||
rep "(def! not (fn* (a) (if a false true)))" | |||
rep "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))" | |||
rep "(defmacro! cond (fn* (& xs) (if (> (count xs) 0) (list 'if (first xs) (if (> (count xs) 1) (nth xs 1) (throw \"odd number of forms to cond\")) (cons 'cond (rest (rest xs)))))))" | |||
rep "(defmacro! or (fn* (& xs) (if (empty? xs) nil (if (= 1 (count xs)) (first xs) `(let* (or_FIXME ~(first xs)) (if or_FIXME or_FIXME (or ~@(rest xs))))))))" | |||
$argv = Mal::List.new | |||
$repl_env.set("*ARGV*", Mal::Type.new $argv) | |||
unless ARGV.empty? | |||
if ARGV.size > 1 | |||
ARGV[1..-1].each do |a| | |||
$argv << Mal::Type.new(a) | |||
end | |||
end | |||
begin | |||
rep "(load-file \"#{ARGV[0]}\")" | |||
rescue e | |||
STDERR.puts e | |||
end | |||
exit | |||
end | |||
while line = my_readline("user> ") | |||
begin | |||
puts rep(line) | |||
rescue e | |||
STDERR.puts e | |||
end | |||
end |