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More improvements to the unmodified variable check

This commit is contained in:
Hackerpilot 2015-01-16 11:10:41 -08:00
parent 235af118d1
commit 5d2aebbf0a
1 changed files with 14 additions and 9 deletions
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23
src/analysis/immutable_finder.d
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@ -10,7 +10,7 @@ import std.d.lexer;
import analysis.base;
/**
* Checks for variables that could have been declared immutable
* Checks for variables that could have been declared const or immutable
*/
class ImmutableFinder:BaseAnalyzer
{
@ -50,7 +50,8 @@ class ImmutableFinder:BaseAnalyzer
override void visit(const VariableDeclaration dec)
{
if (dec.autoDeclaration is null && blockStatementDepth > 0 && isImmutable <= 0 && !canFindImmutable(dec))
if (dec.autoDeclaration is null && blockStatementDepth > 0
&& isImmutable <= 0 && !canFindImmutable(dec))
{
foreach (d; dec.declarators)
{
@ -67,6 +68,7 @@ class ImmutableFinder:BaseAnalyzer
{
if (blockStatementDepth > 0 && isImmutable <= 0
&& (autoDeclaration.storageClass !is null
&& autoDeclaration.storageClass.token != tok!"const"
&& autoDeclaration.storageClass.token != tok!"enum"
&& autoDeclaration.storageClass.token != tok!"immutable"))
{
@ -88,7 +90,7 @@ class ImmutableFinder:BaseAnalyzer
interest++;
assignExpression.ternaryExpression.accept(this);
interest--;
assignExpression.ternaryExpression.accept(this);
assignExpression.assignExpression.accept(this);
}
else
assignExpression.accept(this);
@ -96,7 +98,7 @@ class ImmutableFinder:BaseAnalyzer
override void visit(const Declaration dec)
{
if (canFindImmutable(dec))
if (canFindImmutableOrConst(dec))
{
isImmutable++;
dec.accept(this);
@ -195,10 +197,12 @@ private:
return finder.foundCast;
}
bool canFindImmutable(const Declaration dec)
bool canFindImmutableOrConst(const Declaration dec)
{
import std.algorithm : canFind, map;
return dec.attributes.map!(a => a.attribute).canFind(cast(IdType) tok!"immutable");
import std.algorithm : canFind, map, filter;
return !dec.attributes.map!(a => a.attribute).filter!(
a => a == cast(IdType) tok!"immutable" || a == cast(IdType) tok!"const")
.empty;
}
bool canFindImmutable(const VariableDeclaration dec)
@ -211,7 +215,7 @@ private:
}
foreach (attr; dec.attributes)
{
if (attr.attribute.type == tok!"immutable")
if (attr.attribute.type == tok!"immutable" || attr.attribute.type == tok!"const")
return true;
}
if (dec.type !is null)
@ -234,7 +238,8 @@ private:
foreach (vi; tree[$ - 1])
{
immutable string errorMessage = "Variable " ~ vi.name
~ " is never modified and could have been declared immutable.";
~ " is never modified and could have been declared const"
~ " or immutable.";
addErrorMessage(vi.line, vi.column, "dscanner.suspicious.could_be_immutable",
errorMessage);
}