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adjustments for relaxed composite literal syntax

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R=r
DELTA=41  (0 added, 21 deleted, 20 changed)
OCL=29219
CL=29219
This commit is contained in:
Robert Griesemer 2009-05-21 19:50:25 -07:00
parent f4d3d22a94
commit ad8527c4dc
1 changed files with 9 additions and 30 deletions
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39
src/lib/go/parser/parser.go
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@ -984,51 +984,30 @@ func (p *parser) parseCallOrConversion(fun ast.Expr) *ast.CallExpr {
}
func (p *parser) parseKeyValueExpr() ast.Expr {
func (p *parser) parseElement() ast.Expr {
if p.trace {
defer un(trace(p, "KeyValueExpr"));
defer un(trace(p, "Element"));
}
key := p.parseExpression();
x := p.parseExpression();
if p.tok == token.COLON {
colon := p.pos;
p.next();
value := p.parseExpression();
return &ast.KeyValueExpr{key, colon, value};
x = &ast.KeyValueExpr{x, colon, p.parseExpression()};
}
return key;
return x;
}
func isPair(x ast.Expr) bool {
tmp, is_pair := x.(*ast.KeyValueExpr);
return is_pair;
}
func (p *parser) parseExpressionOrKeyValueList() []ast.Expr {
func (p *parser) parseElementList() []ast.Expr {
if p.trace {
defer un(trace(p, "ExpressionOrKeyValueList"));
defer un(trace(p, "ElementList"));
}
var pairs bool;
list := vector.New(0);
for p.tok != token.RBRACE && p.tok != token.EOF {
x := p.parseKeyValueExpr();
if list.Len() == 0 {
pairs = isPair(x);
} else {
// not the first element - check syntax
if pairs != isPair(x) {
p.error_expected(x.Pos(), "all single expressions or all key-value pairs");
}
}
list.Push(x);
list.Push(p.parseElement());
if p.tok == token.COMMA {
p.next();
} else {
@ -1054,7 +1033,7 @@ func (p *parser) parseCompositeLit(typ ast.Expr) ast.Expr {
lbrace := p.expect(token.LBRACE);
var elts []ast.Expr;
if p.tok != token.RBRACE {
elts = p.parseExpressionOrKeyValueList();
elts = p.parseElementList();
}
rbrace := p.expect(token.RBRACE);
return &ast.CompositeLit{typ, lbrace, elts, rbrace};