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Diffstat (limited to 'compiler/nimfix/pretty.nim')
| -rw-r--r-- | compiler/nimfix/pretty.nim | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/compiler/nimfix/pretty.nim b/compiler/nimfix/pretty.nim new file mode 100644 index 000000000..acac574af --- /dev/null +++ b/compiler/nimfix/pretty.nim @@ -0,0 +1,152 @@ +# +# +# The Nim Compiler +# (c) Copyright 2014 Andreas Rumpf +# +# See the file "copying.txt", included in this +# distribution, for details about the copyright. +# + +## This module implements the code "prettifier". This is part of the toolchain +## to convert Nim code into a consistent style. + +import + strutils, os, options, ast, astalgo, msgs, ropes, idents, + intsets, strtabs, semdata, prettybase + +type + StyleCheck* {.pure.} = enum None, Warn, Auto + +var + gOverWrite* = true + gStyleCheck*: StyleCheck + gCheckExtern*, gOnlyMainfile*: bool + +proc overwriteFiles*() = + let doStrip = options.getConfigVar("pretty.strip").normalize == "on" + for i in 0 .. high(gSourceFiles): + if gSourceFiles[i].dirty and not gSourceFiles[i].isNimfixFile and + (not gOnlyMainfile or gSourceFiles[i].fileIdx == gProjectMainIdx): + let newFile = if gOverWrite: gSourceFiles[i].fullpath + else: gSourceFiles[i].fullpath.changeFileExt(".pretty.nim") + try: + var f = open(newFile, fmWrite) + for line in gSourceFiles[i].lines: + if doStrip: + f.write line.strip(leading = false, trailing = true) + else: + f.write line + f.write(gSourceFiles[i].newline) + f.close + except IOError: + rawMessage(errCannotOpenFile, newFile) + +proc `=~`(s: string, a: openArray[string]): bool = + for x in a: + if s.startsWith(x): return true + +proc beautifyName(s: string, k: TSymKind): string = + # minimal set of rules here for transition: + # GC_ is allowed + + let allUpper = allCharsInSet(s, {'A'..'Z', '0'..'9', '_'}) + if allUpper and k in {skConst, skEnumField, skType}: return s + result = newStringOfCap(s.len) + var i = 0 + case k + of skType, skGenericParam: + # Types should start with a capital unless builtins like 'int' etc.: + if s =~ ["int", "uint", "cint", "cuint", "clong", "cstring", "string", + "char", "byte", "bool", "openArray", "seq", "array", "void", + "pointer", "float", "csize", "cdouble", "cchar", "cschar", + "cshort", "cu", "nil", "expr", "stmt", "typedesc", "auto", "any", + "range", "openarray", "varargs", "set", "cfloat" + ]: + result.add s[i] + else: + result.add toUpper(s[i]) + of skConst, skEnumField: + # for 'const' we keep how it's spelt; either upper case or lower case: + result.add s[0] + else: + # as a special rule, don't transform 'L' to 'l' + if s.len == 1 and s[0] == 'L': result.add 'L' + elif '_' in s: result.add(s[i]) + else: result.add toLower(s[0]) + inc i + while i < s.len: + if s[i] == '_': + if i > 0 and s[i-1] in {'A'..'Z'}: + # don't skip '_' as it's essential for e.g. 'GC_disable' + result.add('_') + inc i + result.add s[i] + else: + inc i + result.add toUpper(s[i]) + elif allUpper: + result.add toLower(s[i]) + else: + result.add s[i] + inc i + +proc replaceInFile(info: TLineInfo; newName: string) = + loadFile(info) + + let line = gSourceFiles[info.fileIndex].lines[info.line-1] + var first = min(info.col.int, line.len) + if first < 0: return + #inc first, skipIgnoreCase(line, "proc ", first) + while first > 0 and line[first-1] in prettybase.Letters: dec first + if first < 0: return + if line[first] == '`': inc first + + let last = first+identLen(line, first)-1 + if differ(line, first, last, newName): + # last-first+1 != newName.len or + var x = line.substr(0, first-1) & newName & line.substr(last+1) + system.shallowCopy(gSourceFiles[info.fileIndex].lines[info.line-1], x) + gSourceFiles[info.fileIndex].dirty = true + +proc checkStyle(info: TLineInfo, s: string, k: TSymKind; sym: PSym) = + let beau = beautifyName(s, k) + if s != beau: + if gStyleCheck == StyleCheck.Auto: + sym.name = getIdent(beau) + replaceInFile(info, beau) + else: + message(info, hintName, beau) + +proc styleCheckDefImpl(info: TLineInfo; s: PSym; k: TSymKind) = + # operators stay as they are: + if k in {skResult, skTemp} or s.name.s[0] notin prettybase.Letters: return + if k in {skType, skGenericParam} and sfAnon in s.flags: return + if {sfImportc, sfExportc} * s.flags == {} or gCheckExtern: + checkStyle(info, s.name.s, k, s) + +template styleCheckDef*(info: TLineInfo; s: PSym; k: TSymKind) = + when defined(nimfix): + if gStyleCheck != StyleCheck.None: styleCheckDefImpl(info, s, k) + +template styleCheckDef*(info: TLineInfo; s: PSym) = + styleCheckDef(info, s, s.kind) +template styleCheckDef*(s: PSym) = + styleCheckDef(s.info, s, s.kind) + +proc styleCheckUseImpl(info: TLineInfo; s: PSym) = + if info.fileIndex < 0: return + # we simply convert it to what it looks like in the definition + # for consistency + + # operators stay as they are: + if s.kind in {skResult, skTemp} or s.name.s[0] notin prettybase.Letters: + return + if s.kind in {skType, skGenericParam} and sfAnon in s.flags: return + let newName = s.name.s + + replaceInFile(info, newName) + #if newName == "File": writeStackTrace() + +template styleCheckUse*(info: TLineInfo; s: PSym) = + when defined(nimfix): + if gStyleCheck != StyleCheck.None: styleCheckUseImpl(info, s) |