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replace libdparse in alias style visitor (#38)

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lucica28 2022-11-14 13:21:02 +02:00 • committed by Vladiwostok
parent 65720ab41f
commit 07f97fb4c5
2 changed files with 51 additions and 22 deletions
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66
src/dscanner/analysis/alias_syntax_check.d
View file

@ -5,50 +5,80 @@
module dscanner.analysis.alias_syntax_check;
import dparse.ast;
import dparse.lexer;
import dscanner.analysis.base;
import dmd.tokens;
import dmd.lexer : Lexer;
import dmd.location : Loc;
/**
* Checks for uses of the old alias syntax.
*/
final class AliasSyntaxCheck : BaseAnalyzer
extern(C++) class AliasSyntaxCheck(AST) : BaseAnalyzerDmd
{
alias visit = BaseAnalyzer.visit;
mixin AnalyzerInfo!"alias_syntax_check";
alias visit = BaseAnalyzerDmd.visit;
this(BaseAnalyzerArguments args)
extern(D) this(string fileName)
{
super(args);
super(fileName);
}
override void visit(const AliasDeclaration ad)
override void visit(AST.AliasDeclaration ad)
{
if (ad.declaratorIdentifierList is null)
return;
assert(ad.declaratorIdentifierList.identifiers.length > 0,
"Identifier list length is zero, libdparse has a bug");
addErrorMessage(ad, KEY,
"Prefer the new \"'alias' identifier '=' type ';'\" syntax"
~ " to the old \"'alias' type identifier ';'\" syntax.");
import dscanner.utils: readFile;
import dmd.errorsink : ErrorSinkNull;
import dmd.globals : global;
__gshared ErrorSinkNull errorSinkNull;
if (!errorSinkNull)
errorSinkNull = new ErrorSinkNull;
auto bytes = readFile(fileName);
bool foundEq = false;
Loc idLoc;
bytes ~= '\0';
bytes = bytes[ad.loc.fileOffset .. $];
scope lexer = new Lexer(null, cast(char*) bytes, 0, bytes.length, 0, 0, errorSinkNull, &global.compileEnv);
TOK nextTok;
lexer.nextToken();
do
{
if (lexer.token.value == TOK.assign)
foundEq = true;
if (lexer.token.value == TOK.identifier)
idLoc = lexer.token.loc;
nextTok = lexer.nextToken;
}
while(nextTok != TOK.semicolon && nextTok != TOK.endOfFile);
if (!foundEq)
// Re-lexing is done based on offsets, so the alias appears to be at line 1.
// Fix this by computing the initial location.
addErrorMessage(cast(ulong) (ad.loc.linnum + idLoc.linnum - 1), cast(ulong) idLoc.charnum, KEY,
"Prefer the new \"'alias' identifier '=' type ';'\" syntax"
~ " to the old \"'alias' type identifier ';'\" syntax.");
}
private:
enum KEY = "dscanner.style.alias_syntax";
}
unittest
{
import dscanner.analysis.helpers : assertAnalyzerWarnings;
import dscanner.analysis.helpers : assertAnalyzerWarnings = assertAnalyzerWarningsDMD;
import dscanner.analysis.config : StaticAnalysisConfig, Check, disabledConfig;
import std.stdio : stderr;
StaticAnalysisConfig sac = disabledConfig();
sac.alias_syntax_check = Check.enabled;
assertAnalyzerWarnings(q{
alias int abcde; /+
^^^^^^^^^^^^^^^^ [warn]: Prefer the new "'alias' identifier '=' type ';'" syntax to the old "'alias' type identifier ';'" syntax.+/
alias int abcde; // [warn]: Prefer the new "'alias' identifier '=' type ';'" syntax to the old "'alias' type identifier ';'" syntax.
alias abcde = int;
}c, sac);

7
src/dscanner/analysis/run.d
View file

@ -929,10 +929,6 @@ private BaseAnalyzer[] getAnalyzersForModuleAndConfig(string fileName,
checks ~= new UselessAssertCheck(args.setSkipTests(
analysisConfig.useless_assert_check == Check.skipTests && !ut));
if (moduleName.shouldRun!AliasSyntaxCheck(analysisConfig))
checks ~= new AliasSyntaxCheck(args.setSkipTests(
analysisConfig.alias_syntax_check == Check.skipTests && !ut));
if (moduleName.shouldRun!StaticIfElse(analysisConfig))
checks ~= new StaticIfElse(args.setSkipTests(
analysisConfig.static_if_else_check == Check.skipTests && !ut));
@ -1321,6 +1317,9 @@ MessageSet analyzeDmd(string fileName, ASTBase.Module m, const char[] moduleName
if (moduleName.shouldRunDmd!(LengthSubtractionCheck!ASTBase)(config))
visitors ~= new LengthSubtractionCheck!ASTBase(fileName);
if (moduleName.shouldRunDmd!(AliasSyntaxCheck!ASTBase)(config))
visitors ~= new AliasSyntaxCheck!ASTBase(fileName);
if (moduleName.shouldRunDmd!(ExplicitlyAnnotatedUnittestCheck!ASTBase)(config))
visitors ~= new ExplicitlyAnnotatedUnittestCheck!ASTBase(fileName);