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General cleanup, use single quotes in Python, added single quoted strings to SallyForth.

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This commit is contained in:
Russ Olsen 2020-04-17 13:44:18 -04:00
parent 8785b97f03
commit 0f63796331
4 changed files with 46 additions and 38 deletions
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18
sallyforth/kernel.py
View file

@ -24,7 +24,7 @@ class Forth:
def __init__(self, startup=None): def __init__(self, startup=None):
self.stack = Stack() self.stack = Stack()
self.dictionary = { self.dictionary = {
'*prompt*': const_f("SallyForth>> "), '*prompt*': const_f('SallyForth>> '),
'true': const_f(True), 'true': const_f(True),
'false': const_f(False), 'false': const_f(False),
'nil': const_f(None), 'nil': const_f(None),
@ -108,9 +108,9 @@ class Forth:
if token in self.dictionary: if token in self.dictionary:
word = self.dictionary[token] word = self.dictionary[token]
if 'immediate' in word.__dict__: if 'immediate' in word.__dict__:
#print("before immediate word:", self, self.dictionary) #print('before immediate word:', self, self.dictionary)
word(self) word(self)
#print("after immediate word:", self, self.dictionary) #print('after immediate word:', self, self.dictionary)
else: else:
self.compiler.add_instruction(self.dictionary[token]) self.compiler.add_instruction(self.dictionary[token])
return return
@ -118,7 +118,7 @@ class Forth:
n = to_number(token) n = to_number(token)
if n == None: if n == None:
self.compiler = None self.compiler = None
print(token, "? Compile terminated.") print(f'{token}? Compile terminated.')
else: else:
self.compiler.add_instruction(push_value_f(n)) self.compiler.add_instruction(push_value_f(n))
@ -133,12 +133,12 @@ class Forth:
n = to_number(token) n = to_number(token)
if n == None: if n == None:
print(token, "?") print(f'{token}?')
else: else:
self.stack.push(n) self.stack.push(n)
def dump(self): def dump(self):
print("Forth:", self) print('Forth:', self)
print("Stack:", self.stack) print('Stack:', self.stack)
print("Dictionary:", self.dictionary) print('Dictionary:', self.dictionary)
print("Compiler:", self.compiler) print('Compiler:', self.compiler)

16
sallyforth/lex.py
View file

@ -3,11 +3,10 @@ import readline
from os import path from os import path
def is_string(token): def is_string(token):
#print("is string:", token, token[0], token[0] == '"') return token[0] == '"' or token[0] == "'"
return token[0] == '"'
def is_space(ch): def is_space(ch):
return ch == " " or ch == "\t" or ch == "\n" return ch == ' ' or ch == '\t' or ch == '\n'
def tokenize(s): def tokenize(s):
state = 'start' state = 'start'
@ -23,12 +22,19 @@ def tokenize(s):
continue continue
elif state == 'start' and is_space(ch): elif state == 'start' and is_space(ch):
continue continue
elif state == 'start' and ch == "'":
token = ch
state = 's_string'
elif state == 'start' and ch == '"': elif state == 'start' and ch == '"':
token = ch token = ch
state = 'string' state = 'string'
elif state == 'start': elif state == 'start':
token = ch token = ch
state = 'word' state = 'word'
elif state == 's_string' and ch == "'":
tokens.append(token)
state = 'start'
token = ''
elif state == 'string' and ch == '"': elif state == 'string' and ch == '"':
tokens.append(token) tokens.append(token)
state = 'start' state = 'start'
@ -37,7 +43,7 @@ def tokenize(s):
tokens.append(token) tokens.append(token)
state = 'start' state = 'start'
token = '' token = ''
elif state == 'word' or state == 'string': elif state == 'word' or state == 'string' or state == 's_string':
token += ch token += ch
else: else:
print(f'State: [{state}] token: [{token}] ch: [{ch}]???') print(f'State: [{state}] token: [{token}] ch: [{ch}]???')
@ -51,7 +57,7 @@ def read_tokens(read_f):
return tokenize(line) return tokenize(line)
def forth_prompt(): def forth_prompt():
return input("SallyForth>> ") return input('SallyForth>> ')
def file_read_f(f): def file_read_f(f):
def read_it(): def read_it():

3
sallyforth/startup.sf
View file

@ -1,5 +1,6 @@
"Executing " . *source* . nl "Executing " . *source* . nl
"builtins" require
"time" require "time" require
"math" require "math" require
"sys" require "sys" require
@ -35,3 +36,5 @@
; ;
"init.sf" source-if-exists "init.sf" source-if-exists

47
sallyforth/words.py
View file

@ -23,7 +23,7 @@ def import_native_module(forth, m, alias=None, excludes=[]):
names = [x for x in raw_names if x not in excludes] names = [x for x in raw_names if x not in excludes]
for name in names: for name in names:
localname = f'{alias}.{name}' localname = f'{alias}.{name}'
print(localname) #print(localname)
val = m.__getattribute__(name) val = m.__getattribute__(name)
if isfunction(val) or isbuiltin(val): if isfunction(val) or isbuiltin(val):
forth.dictionary[localname] = native_function_handler(val) forth.dictionary[localname] = native_function_handler(val)
@ -42,13 +42,13 @@ def w_source(f):
return 1 return 1
def execute_f(name, instructions): def execute_f(name, instructions):
# print("execute_f:", len(instructions)) # print('execute_f:', len(instructions))
def inner(forth, debug=False): def inner(forth, debug=False):
# print("inner f:", name) # print('inner f:', name)
# print("inner f:", len(instructions)) # print('inner f:', len(instructions))
i = 0 i = 0
while i >= 0: while i >= 0:
# print(i, "=>", instructions[i]) # print(i, '=>', instructions[i])
delta = instructions[i](forth) delta = instructions[i](forth)
i += delta i += delta
return 1 return 1
@ -56,14 +56,14 @@ def execute_f(name, instructions):
def ifnot_jump_f(n): def ifnot_jump_f(n):
def ifnot_jump(forth): def ifnot_jump(forth):
# print("If not jump:") # print('If not jump:')
x = forth.stack.pop() x = forth.stack.pop()
# print("==>value:", x) # print('==>value:', x)
if not x: if not x:
# print("==>", x, " is false") # print('==>', x, ' is false')
# print("==>returning", n) # print('==>returning', n)
return n return n
# print("==>returning 1") # print('==>returning 1')
return 1 return 1
return ifnot_jump return ifnot_jump
@ -80,15 +80,15 @@ def w_import(f):
def w_px(f): def w_px(f):
args = f.stack.pop() args = f.stack.pop()
print("args", args) #print('args', args)
name = f.stack.pop() name = f.stack.pop()
print("name", name) #print('name', name)
m = f.stack.pop() m = f.stack.pop()
print("mod:", m) #print('mod:', m)
func = m.__dict__[name] func = m.__dict__[name]
print("f:", f); #print('f:', f);
result = func(*args) result = func(*args)
print("result", result) #print('result', result)
f.stack.push(result) f.stack.push(result)
return 1 return 1
@ -97,7 +97,7 @@ def w_list(f):
l = [] l = []
for i in range(n): for i in range(n):
l.append(f.stack.pop()) l.append(f.stack.pop())
print(l) #print(l)
f.stack.push(l) f.stack.push(l)
return 1 return 1
@ -130,7 +130,7 @@ def w_endmap(f): # }
l.append(x) l.append(x)
x = f.stack.pop() x = f.stack.pop()
if (len(l) % 2) != 0: if (len(l) % 2) != 0:
print("Maps need even number of entries.") print('Maps need even number of entries.')
return 1 return 1
l.reverse() l.reverse()
result = {} result = {}
@ -157,7 +157,7 @@ def w_def(f):
value = f.stack.pop() value = f.stack.pop()
name = f.stack.pop() name = f.stack.pop()
f.defvar(name, value) f.defvar(name, value)
print('name', name, 'value', value) #print('name', name, 'value', value)
return 1 return 1
def w_gt(f): def w_gt(f):
@ -265,11 +265,11 @@ def w_semi(forth):
w_semi.__dict__['immediate'] = True w_semi.__dict__['immediate'] = True
def w_should_not_happen(forth): def w_should_not_happen(forth):
print("Should not execute this word!") print('Should not execute this word!')
raise ValueError raise ValueError
def w_if(forth): def w_if(forth):
print("w_if") #print('w_if')
compiler = forth.compiler compiler = forth.compiler
compiler.push_offset() compiler.push_offset()
compiler.push_offset() compiler.push_offset()
@ -306,7 +306,7 @@ def w_else(forth):
w_else.__dict__['immediate'] = True w_else.__dict__['immediate'] = True
def w_do(forth): def w_do(forth):
print("w_do") #print('w_do')
compiler = forth.compiler compiler = forth.compiler
compiler.push_offset() compiler.push_offset()
compiler.add_instruction(w_should_not_happen) compiler.add_instruction(w_should_not_happen)
@ -336,7 +336,7 @@ def w_until(forth):
begin_offset = compiler.pop_offset() begin_offset = compiler.pop_offset()
until_offset = compiler.offset() until_offset = compiler.offset()
delta = begin_offset - until_offset delta = begin_offset - until_offset
print("Delta:", delta) #print('Delta:', delta)
compiler.instructions.append(ifnot_jump_f(delta)) compiler.instructions.append(ifnot_jump_f(delta))
return 1 return 1
@ -355,6 +355,5 @@ def w_idump(f):
w_idump.__dict__['immediate'] = True w_idump.__dict__['immediate'] = True
def w_stack(f): def w_stack(f):
print(f.stack) print(f'Stack: <B[{f.stack}]T>')
return 1 return 1