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Address code review; check class heritage clause into its own function

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This commit is contained in:
Yui T 2014-12-12 15:10:35 -08:00
parent 56cf566f89
commit 5b98eba3d8
1 changed files with 41 additions and 37 deletions
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78
src/compiler/checker.ts
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@ -8263,43 +8263,7 @@ module ts {
function checkClassDeclaration(node: ClassDeclaration) {
// Grammar checking
var seenExtendsClause = false;
var seenImplementsClause = false;
if (!checkGrammarModifiers(node) && node.heritageClauses) {
for (var i = 0, n = node.heritageClauses.length; i < n; i++) {
Debug.assert(i <= 2);
var heritageClause = node.heritageClauses[i];
if (heritageClause.token === SyntaxKind.ExtendsKeyword) {
if (seenExtendsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.extends_clause_already_seen)
break;
}
if (seenImplementsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.extends_clause_must_precede_implements_clause);
break;
}
if (heritageClause.types.length > 1) {
grammarErrorOnFirstToken(heritageClause.types[1], Diagnostics.Classes_can_only_extend_a_single_class);
break;
}
seenExtendsClause = true;
}
else {
Debug.assert(heritageClause.token === SyntaxKind.ImplementsKeyword);
if (seenImplementsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.implements_clause_already_seen);
break;
}
seenImplementsClause = true;
}
}
}
checkGrammarClassDeclarationHeritageClauses(node);
checkTypeNameIsReserved(node.name, Diagnostics.Class_name_cannot_be_0);
checkTypeParameters(node.typeParameters);
@ -10044,6 +10008,46 @@ module ts {
}
}
function checkGrammarClassDeclarationHeritageClauses(node: ClassDeclaration) {
var seenExtendsClause = false;
var seenImplementsClause = false;
if (!checkGrammarModifiers(node) && node.heritageClauses) {
for (var i = 0, n = node.heritageClauses.length; i < n; i++) {
Debug.assert(i <= 2);
var heritageClause = node.heritageClauses[i];
if (heritageClause.token === SyntaxKind.ExtendsKeyword) {
if (seenExtendsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.extends_clause_already_seen)
break;
}
if (seenImplementsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.extends_clause_must_precede_implements_clause);
break;
}
if (heritageClause.types.length > 1) {
grammarErrorOnFirstToken(heritageClause.types[1], Diagnostics.Classes_can_only_extend_a_single_class);
break;
}
seenExtendsClause = true;
}
else {
Debug.assert(heritageClause.token === SyntaxKind.ImplementsKeyword);
if (seenImplementsClause) {
grammarErrorOnFirstToken(heritageClause, Diagnostics.implements_clause_already_seen);
break;
}
seenImplementsClause = true;
}
}
}
}
function checkGrammarComputedPropertyName(node: ComputedPropertyName): void {
// Since computed properties are not supported in the type checker, disallow them in TypeScript 1.4
// Once full support is added, remove this error.