daviddoji/example-code-2e
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

2e reviewed manuscript

Browse Source
This commit is contained in:
Luciano Ramalho
2021-11-12 11:33:12 -03:00
parent f5e3cb8ad3
commit 80f7f84274
32 changed files with 323 additions and 156 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
02-array-seq/lispy/py3.10/lis.py
View File

@@ -84,7 +84,7 @@ def standard_env() -> Environment:
'-': op.sub,
'*': op.mul,
'/': op.truediv,
'//': op.floordiv,
'quotient': op.floordiv,
'>': op.gt,
'<': op.lt,
'>=': op.ge,
@@ -149,7 +149,7 @@ def evaluate(exp: Expression, env: Environment) -> Any:
# end::EVAL_MATCH_TOP[]
case int(x) | float(x):
return x
case Symbol(name):
case Symbol() as name:
return env[name]
# tag::EVAL_MATCH_MIDDLE[]
case ['quote', x]: # <1>
@@ -161,12 +161,12 @@ def evaluate(exp: Expression, env: Environment) -> Any:
return evaluate(alternative, env)
case ['lambda', [*parms], *body] if body: # <3>
return Procedure(parms, body, env)
case ['define', Symbol(name), value_exp]: # <4>
case ['define', Symbol() as name, value_exp]: # <4>
env[name] = evaluate(value_exp, env)
# end::EVAL_MATCH_MIDDLE[]
case ['define', [Symbol(name), *parms], *body] if body:
case ['define', [Symbol() as name, *parms], *body] if body:
env[name] = Procedure(parms, body, env)
case ['set!', Symbol(name), value_exp]:
case ['set!', Symbol() as name, value_exp]:
env.change(name, evaluate(value_exp, env))
case [func_exp, *args] if func_exp not in KEYWORDS:
proc = evaluate(func_exp, env)