smolscript / completion.py
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"""Fixed base-model code completion. No reference/test fields are read."""
import io
import re
import tokenize
PROMPT_VERSION='smolscript-base-completion-v3'
SIGNATURES={
'python':{'scalar':'def solve(n):','string':'def solve(s):','array':'def solve(values):'},
'javascript':{'scalar':'function solve(n)','string':'function solve(s)','array':'function solve(values)','dom':'function setup()'},
'cpp':{'scalar':'long long solve(long long n)','string':'std::string solve(std::string s)','array':'long long solve(const std::vector<long long>& values)'},
'c':{'scalar':'long long solve(long long n)','string':'const char *solve(const char *input)','array':'long long solve(const long long *values, int length)'},
'lua':{'scalar':'function solve(n)','string':'function solve(s)','array':'function solve(values)'},
'csharp':{'scalar':'public static long Solve(long n)','string':'public static string Solve(string s)','array':'public static long Solve(long[] values)'},
'rust':{'scalar':'fn solve(mut n: i64) -> i64','string':'fn solve(mut s: String) -> String','array':'fn solve(values: Vec<i64>) -> i64'},
}
def prefix(row):
lang=row['language'];kind=row['metadata']['family']
if lang=='html':return '<'
if lang=='css':return ''
header=SIGNATURES[lang][kind]
if lang=='python':return header+'\n'
if lang=='lua':return header+'\n'
if kind=='dom':return header+' {\n'
if lang=='csharp':return 'public class Solution {\n'+header+' {\n'
return header+' {\n'
def prompt(row):
from runners.protocol import HEADERS
lang=row['language'];meta=row['metadata']
task=re.sub(r'^In [^,]+,\s*','',row['prompt'])
task=task.replace(' Return CSS only.','').replace(' Return an HTML fragment.','')
task=task.removeprefix('Implement setup(). ')
details=[task]
if meta.get('input_domain'):details.append(meta['input_domain'])
context=[]
if meta.get('fixture'):context.append('HTML fixture: '+meta['fixture'])
if meta.get('base_css'):context.append('Existing CSS: '+meta['base_css'])
details=context+details
if lang=='html':comment='<!-- '+ ' '.join(details).replace('-->','-- >')+' -->\n'
elif lang=='css':comment='/* '+ ' '.join(details).replace('*/','* /')+' */\n'
else:
marker='#' if lang=='python' else '--' if lang=='lua' else '//'
comment='\n'.join(marker+' '+line for line in details)+'\n'
return comment+HEADERS.get(lang,'')+prefix(row)
def _brace_end(source):
"""First complete braced function/class, ignoring quoted strings/comments.
Lexer-only delimiting: never evaluate, fix or choose code by test success.
"""
depth=0;opened=False;i=0;previous=''
while i<len(source):
if source.startswith('//',i):
end=source.find('\n',i);i=len(source) if end<0 else end+1;continue
if source.startswith('/*',i):
end=source.find('*/',i+2)
if end<0:return len(source)
i=end+2;continue
# C/C++/C#/JS/Rust strings and character literals; Rust lifetimes are
# identifiers, not single-quoted characters.
ch=source[i]
raw=re.match(r'(?:u8|u|U|L)?R"([^\s()\\]{0,16})\(',source[i:])
if raw:
end=source.find(')'+raw.group(1)+'"',i+raw.end())
if end<0:return len(source)
i=end+len(raw.group(1))+2;previous='v';continue
word=re.match(r'[A-Za-z_$][\w$]*',source[i:])
if word:
previous=word.group();i+=len(previous);continue
if ch in ('"','`') or (ch=="'" and re.match(r"'(?:\\.|[^'\\\n])'",source[i:])):
quote=ch;verbatim=quote=='"' and i>0 and source[i-1]=='@';i+=1
while i<len(source):
if source[i]=='\\' and not verbatim:i+=2;continue
if source[i]==quote:
if quote=='"' and i+1<len(source) and source[i+1]=='"' and verbatim:
i+=2;continue
i+=1;break
i+=1
previous='v';continue
# JS regular-expression literals occurring where an expression begins.
if ch=='/' and previous in ('=', '(', ',', ':', '[', '!', '?', 'return', 'throw', 'case', '=>'):
j=i+1;inside=False
while j<len(source) and source[j]!='\n':
if source[j]=='\\':j+=2;continue
if source[j]=='[':inside=True
if source[j]==']':inside=False
if source[j]=='/' and not inside:i=j+1;break
j+=1
else:i+=1
previous='v';continue
if ch=='{':depth+=1;opened=True
elif ch=='}':
depth-=1
if opened and depth==0:return i+1
if not ch.isspace():previous='=>' if ch=='>' and previous=='=' else ch
i+=1
return len(source)
def _python_end(source):
depth=0;body=False
try:
for token in tokenize.generate_tokens(io.StringIO(source).readline):
if token.type==tokenize.INDENT:depth+=1;body=True
elif token.type==tokenize.DEDENT:
depth-=1
if body and depth==0:return sum(len(x) for x in source.splitlines(keepends=True)[:token.start[0]-1])
except (tokenize.TokenError,IndentationError):pass
return len(source)
def _lua_end(source):
# Tokenize strings/comments first, then count Lua's block delimiters.
pattern=r'--\[\[.*?\]\]|--[^\n]*|\[(=*)\[.*?\]\1\]|"(?:\\.|[^"\\])*"|\'(?:\\.|[^\'\\])*\'|\b(?:function|if|for|while|do|repeat|end|until)\b'
depth=0;loops=0
for match in re.finditer(pattern,source,re.S):
word=match.group()
if word in ('function','if','repeat'):depth+=1
elif word in ('for','while'):depth+=1;loops+=1
elif word=='do':
if loops:loops-=1
else:depth+=1
elif word in ('end','until'):
depth-=1
if depth==0:return match.end()
return len(source)
def assemble(row,continuation):
"""Attach the supplied header; keep the first completed entry-point scope.
No indentation, expressions, missing delimiters or return values are repaired.
A complete function emitted from scratch is accepted as a format alternative.
"""
lang=row['language']
text=continuation
if text.lstrip().startswith('```'):
from runners.common import extract_code
text=extract_code(text,preserve_indentation=True)
expected=prefix(row)
starts={
'python':r'^def\s+solve\s*\(', 'javascript':r'^(?:async\s+)?function\s+(?:solve|setup)\s*\(',
'lua':r'^function\s+solve\s*\(', 'csharp':r'^public\s+class\s+Solution\b',
'rust':r'^fn\s+solve\s*\(', 'cpp':r'^(?:long\s+long|std::string)\s+solve\s*\(',
'c':r'^(?:long\s+long|const\s+char\s*\*)\s*solve\s*\(',
}
complete_python=False
if lang=='python':
import ast
try:complete_python=any(isinstance(n,ast.FunctionDef) and n.name=='solve' for n in ast.parse(text).body)
except SyntaxError:pass
if complete_python:code=text.lstrip()
elif lang in starts and re.match(starts[lang],text.lstrip()):code=text.lstrip()
elif lang=='html' and text.lstrip().startswith('<'):code=text.lstrip()
else:code=expected+text
if lang=='python' and not complete_python:
import ast
try:ast.parse(code)
except SyntaxError:code=code[:_python_end(code)]
elif lang=='lua':code=code[:_lua_end(code)]
elif lang not in ('html','css','python'):code=code[:_brace_end(code)]
return code.rstrip()+'\n'