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mirror of https://github.com/golang/go synced 2024-11-11 22:10:22 -07:00

daily snapshot:

- use explicit expression lists instead of binary trees to represent lists of the form a, b, c
(per discussion w/ Russ)
- use explicit nodes for various language constructs for better readability
- various adjustments in parsing and printing

next steps:
- clean up AST fully so it can be checked in as library

R=r
OCL=26371
CL=26371
This commit is contained in:
Robert Griesemer 2009-03-16 20:29:31 -07:00
parent dea4394a67
commit 3cfd91f85b
3 changed files with 313 additions and 155 deletions

View File

@ -273,37 +273,6 @@ func (x *MapType) Visit(v ExprVisitor) { v.DoMapType(x); }
func (x *ChannelType) Visit(v ExprVisitor) { v.DoChannelType(x); }
// Length of a comma-separated expression list.
func ExprLen(x Expr) int {
if x == nil {
return 0;
}
n := 1;
for {
if p, ok := x.(*BinaryExpr); ok && p.Tok == token.COMMA {
n++;
x = p.Y;
} else {
break;
}
}
return n;
}
func ExprAt(x Expr, i int) Expr {
for j := 0; j < i; j++ {
assert(x.(*BinaryExpr).Tok == token.COMMA);
x = x.(*BinaryExpr).Y;
}
if t, is_binary := x.(*BinaryExpr); is_binary && t.Tok == token.COMMA {
x = t.X;
}
return x;
}
// ----------------------------------------------------------------------------
// Blocks
//
@ -357,6 +326,24 @@ type (
Expr Expr;
};
AssignmentStat struct {
Loc scanner.Location; // location of Tok
Tok int; // assignment token
Lhs, Rhs Expr;
};
TupleAssignStat struct {
Loc scanner.Location; // location of Tok
Tok int; // assignment token
Lhs, Rhs []Expr;
};
IncDecStat struct {
Loc scanner.Location; // location of '++' or '--'
Tok int; // token.INC or token.DEC
Expr Expr;
};
CompositeStat struct {
Body *Block;
};
@ -369,6 +356,13 @@ type (
Else Stat;
};
RangeClause struct { // appears only as Init stat in a ForStat
Loc scanner.Location; // location of "=" or ":="
Tok int; // token.ASSIGN or token.DEFINE
Lhs []Expr;
Rhs Expr;
};
ForStat struct {
Loc scanner.Location; // location of "for"
Init Stat;
@ -377,9 +371,15 @@ type (
Body *Block;
};
TypeSwitchClause struct { // appears only as Init stat in a SwitchStat
Loc scanner.Location; // location of ":="
Lhs *Ident;
Rhs Expr;
};
CaseClause struct {
Loc scanner.Location; // position for "case" or "default"
Expr Expr; // nil means default case
Loc scanner.Location; // location of "case" or "default"
Values []Expr; // nil means default case
Body *Block;
};
@ -389,7 +389,14 @@ type (
Tag Expr;
Body *Block;
};
CommClause struct {
Loc scanner.Location; // location of "case" or "default"
Tok int; // token.ASSIGN, token.DEFINE (valid only if Lhs != nil)
Lhs, Rhs Expr; // Rhs == nil means default case
Body *Block;
};
SelectStat struct {
Loc scanner.Location; // location of "select"
Body *Block;
@ -401,6 +408,11 @@ type (
Label *Ident; // if any, or nil
};
ReturnStat struct {
Loc scanner.Location; // location of "return"
Results []Expr;
};
EmptyStat struct {
Loc scanner.Location; // location of ";"
};
@ -412,13 +424,20 @@ type StatVisitor interface {
DoLabeledStat(s *LabeledStat);
DoDeclarationStat(s *DeclarationStat);
DoExpressionStat(s *ExpressionStat);
DoAssignmentStat(s *AssignmentStat);
DoTupleAssignStat(s *TupleAssignStat);
DoIncDecStat(s *IncDecStat);
DoCompositeStat(s *CompositeStat);
DoIfStat(s *IfStat);
DoRangeClause(s *RangeClause);
DoForStat(s *ForStat);
DoTypeSwitchClause(s *TypeSwitchClause);
DoCaseClause(s *CaseClause);
DoSwitchStat(s *SwitchStat);
DoCommClause(s *CommClause);
DoSelectStat(s *SelectStat);
DoControlFlowStat(s *ControlFlowStat);
DoReturnStat(s *ReturnStat);
DoEmptyStat(s *EmptyStat);
}
@ -427,13 +446,20 @@ func (s *BadStat) Visit(v StatVisitor) { v.DoBadStat(s); }
func (s *LabeledStat) Visit(v StatVisitor) { v.DoLabeledStat(s); }
func (s *DeclarationStat) Visit(v StatVisitor) { v.DoDeclarationStat(s); }
func (s *ExpressionStat) Visit(v StatVisitor) { v.DoExpressionStat(s); }
func (s *AssignmentStat) Visit(v StatVisitor) { v.DoAssignmentStat(s); }
func (s *TupleAssignStat) Visit(v StatVisitor) { v.DoTupleAssignStat(s); }
func (s *IncDecStat) Visit(v StatVisitor) { v.DoIncDecStat(s); }
func (s *CompositeStat) Visit(v StatVisitor) { v.DoCompositeStat(s); }
func (s *IfStat) Visit(v StatVisitor) { v.DoIfStat(s); }
func (s *RangeClause) Visit(v StatVisitor) { v.DoRangeClause(s); }
func (s *ForStat) Visit(v StatVisitor) { v.DoForStat(s); }
func (s *TypeSwitchClause) Visit(v StatVisitor) { v.DoTypeSwitchClause(s); }
func (s *CaseClause) Visit(v StatVisitor) { v.DoCaseClause(s); }
func (s *SwitchStat) Visit(v StatVisitor) { v.DoSwitchStat(s); }
func (s *CommClause) Visit(v StatVisitor) { v.DoCommClause(s); }
func (s *SelectStat) Visit(v StatVisitor) { v.DoSelectStat(s); }
func (s *ControlFlowStat) Visit(v StatVisitor) { v.DoControlFlowStat(s); }
func (s *ReturnStat) Visit(v StatVisitor) { v.DoReturnStat(s); }
func (s *EmptyStat) Visit(v StatVisitor) { v.DoEmptyStat(s); }
@ -461,7 +487,7 @@ type (
Loc scanner.Location; // if > 0: position of "const"
Names []*Ident;
Typ Expr;
Vals Expr;
Values []Expr;
Comment CommentGroup;
};
@ -476,7 +502,7 @@ type (
Loc scanner.Location; // if > 0: position of "var"
Names []*Ident;
Typ Expr;
Vals Expr;
Values []Expr;
Comment CommentGroup;
};

View File

@ -224,33 +224,7 @@ func (P *Parser) parseIdent() *ast.Ident {
}
func (P *Parser) parseIdentList(x ast.Expr) ast.Expr {
if P.trace {
defer un(trace(P, "IdentList"));
}
var last *ast.BinaryExpr;
if x == nil {
x = P.parseIdent();
}
for P.tok == token.COMMA {
loc := P.loc;
P.next();
y := P.parseIdent();
if last == nil {
last = &ast.BinaryExpr{loc, token.COMMA, x, y};
x = last;
} else {
last.Y = &ast.BinaryExpr{loc, token.COMMA, last.Y, y};
last = last.Y.(*ast.BinaryExpr);
}
}
return x;
}
func (P *Parser) parseIdentList2(x ast.Expr) []*ast.Ident {
func (P *Parser) parseIdentList(x ast.Expr) []*ast.Ident {
if P.trace {
defer un(trace(P, "IdentList"));
}
@ -274,6 +248,27 @@ func (P *Parser) parseIdentList2(x ast.Expr) []*ast.Ident {
}
func (P *Parser) parseExpressionList() []ast.Expr {
if P.trace {
defer un(trace(P, "ExpressionList"));
}
list := vector.New(0);
list.Push(P.parseExpression(1)); // TODO should use a const instead of 1
for P.tok == token.COMMA {
P.next();
list.Push(P.parseExpression(1)); // TODO should use a const instead of 1
}
// convert vector
exprs := make([]ast.Expr, list.Len());
for i := 0; i < list.Len(); i++ {
exprs[i] = list.At(i).(ast.Expr);
}
return exprs;
}
// ----------------------------------------------------------------------------
// Types
@ -434,7 +429,7 @@ func (P *Parser) parseParameterList(ellipsis_ok bool) []*ast.Field {
for P.tok == token.COMMA {
P.next();
idents := P.parseIdentList2(nil);
idents := P.parseIdentList(nil);
typ := P.parseParameterType();
list.Push(&ast.Field{idents, typ, nil, nil});
}
@ -536,7 +531,7 @@ func (P *Parser) parseMethodSpec() *ast.Field {
x := P.parseQualifiedIdent();
if tmp, is_ident := x.(*ast.Ident); is_ident && (P.tok == token.COMMA || P.tok == token.LPAREN) {
// method(s)
idents = P.parseIdentList2(x);
idents = P.parseIdentList(x);
typ = &ast.FunctionType{noloc, P.parseSignature()};
} else {
// embedded interface
@ -786,28 +781,6 @@ func (P *Parser) parseBlock(tok int) *ast.Block {
// ----------------------------------------------------------------------------
// Expressions
func (P *Parser) parseExpressionList() ast.Expr {
if P.trace {
defer un(trace(P, "ExpressionList"));
}
x := P.parseExpression(1);
for first := true; P.tok == token.COMMA; {
loc := P.loc;
P.next();
y := P.parseExpression(1);
if first {
x = &ast.BinaryExpr{loc, token.COMMA, x, y};
first = false;
} else {
x.(*ast.BinaryExpr).Y = &ast.BinaryExpr{loc, token.COMMA, x.(*ast.BinaryExpr).Y, y};
}
}
return x;
}
func (P *Parser) parseFunctionLit() ast.Expr {
if P.trace {
defer un(trace(P, "FunctionLit"));
@ -1085,30 +1058,33 @@ func (P *Parser) parseExpression(prec int) ast.Expr {
// ----------------------------------------------------------------------------
// Statements
const /* mode */ (
label_ok = 1 << iota;
range_ok;
)
func (P *Parser) parseSimpleStat(mode int) ast.Stat {
if P.trace {
defer un(trace(P, "SimpleStat"));
}
loc := P.loc;
x := P.parseExpressionList();
switch P.tok {
case token.COLON:
// labeled statement
loc := P.loc;
P.next(); // consume ":"
P.expect(token.COLON);
P.opt_semi = true;
if mode & label_ok != 0 && ast.ExprLen(x) == 1 {
if label, is_ident := x.(*ast.Ident); is_ident {
if mode & label_ok != 0 && len(x) == 1 {
if label, is_ident := x[0].(*ast.Ident); is_ident {
return &ast.LabeledStat{loc, label, P.parseStatement()};
}
}
P.error(x.Loc(), "illegal label declaration");
P.error(loc, "illegal label declaration");
return nil;
case
@ -1116,39 +1092,49 @@ func (P *Parser) parseSimpleStat(mode int) ast.Stat {
token.SUB_ASSIGN, token.MUL_ASSIGN, token.QUO_ASSIGN,
token.REM_ASSIGN, token.AND_ASSIGN, token.OR_ASSIGN,
token.XOR_ASSIGN, token.SHL_ASSIGN, token.SHR_ASSIGN:
// declaration/assignment
// assignment statement or range clause
loc, tok := P.loc, P.tok;
P.next();
var y ast.Expr;
if mode & range_ok != 0 && P.tok == token.RANGE {
range_loc := P.loc;
// range clause
P.next();
y = &ast.UnaryExpr{range_loc, token.RANGE, P.parseExpression(1)};
if len(x) != 1 && len(x) != 2 {
P.error(loc, "expected 1 or 2 expressions on lhs of range clause");
}
if tok != token.DEFINE && tok != token.ASSIGN {
P.error(loc, "expected '=' or ':=', found '" + token.TokenString(tok) + "'");
}
y := P.parseExpression(1);
return &ast.RangeClause{loc, tok, x, y};
} else {
y = P.parseExpressionList();
if xl, yl := ast.ExprLen(x), ast.ExprLen(y); xl > 1 && yl > 1 && xl != yl {
P.error(x.Loc(), "arity of lhs doesn't match rhs");
// assignment statement
y := P.parseExpressionList();
xl, yl := len(x), len(y);
if xl > 1 && yl > 1 && xl != yl {
P.error(loc, "arity of lhs doesn't match rhs"); // TODO use better loc for error
}
if xl == 1 && yl == 1 {
// common case - use smaller node
return &ast.AssignmentStat{loc, tok, x[0], y[0]};
} else {
// general case
return &ast.TupleAssignStat{loc, tok, x, y};
}
}
// TODO changed ILLEGAL -> NONE
return &ast.ExpressionStat{x.Loc(), token.ILLEGAL, &ast.BinaryExpr{loc, tok, x, y}};
default:
if ast.ExprLen(x) != 1 {
P.error(x.Loc(), "only one expression allowed");
if len(x) != 1 {
P.error(loc, "only one expression allowed");
}
if P.tok == token.INC || P.tok == token.DEC {
s := &ast.ExpressionStat{P.loc, P.tok, x};
s := &ast.IncDecStat{P.loc, P.tok, x[0]};
P.next(); // consume "++" or "--"
return s;
}
// TODO changed ILLEGAL -> NONE
return &ast.ExpressionStat{x.Loc(), token.ILLEGAL, x};
// TODO change ILLEGAL -> NONE
return &ast.ExpressionStat{loc, token.ILLEGAL, x[0]};
}
unreachable();
@ -1167,19 +1153,19 @@ func (P *Parser) parseInvocationStat(keyword int) *ast.ExpressionStat {
}
func (P *Parser) parseReturnStat() *ast.ExpressionStat {
func (P *Parser) parseReturnStat() *ast.ReturnStat {
if P.trace {
defer un(trace(P, "ReturnStat"));
}
loc := P.loc;
P.expect(token.RETURN);
var x ast.Expr;
var x []ast.Expr;
if P.tok != token.SEMICOLON && P.tok != token.RBRACE {
x = P.parseExpressionList();
}
return &ast.ExpressionStat{loc, token.RETURN, x};
return &ast.ReturnStat{loc, x};
}
@ -1206,34 +1192,37 @@ func (P *Parser) parseControlClause(isForStat bool) (init ast.Stat, expr ast.Exp
if P.tok != token.LBRACE {
prev_lev := P.expr_lev;
P.expr_lev = -1;
if P.tok != token.SEMICOLON {
mode := 0;
if isForStat {
mode = range_ok;
}
init = P.parseSimpleStat(mode);
// TODO check for range clause and exit if found
}
if P.tok == token.SEMICOLON {
P.next();
if P.tok != token.SEMICOLON && P.tok != token.LBRACE {
expr = P.parseExpression(1);
}
if isForStat {
P.expect(token.SEMICOLON);
if P.tok != token.LBRACE {
post = P.parseSimpleStat(0);
if dummy, is_range := init.(*ast.RangeClause); !is_range {
if P.tok == token.SEMICOLON {
P.next();
if P.tok != token.SEMICOLON && P.tok != token.LBRACE {
expr = P.parseExpression(1);
}
}
} else {
if init != nil { // guard in case of errors
if s, is_expr_stat := init.(*ast.ExpressionStat); is_expr_stat {
expr, init = s.Expr, nil;
} else {
P.error(noloc, "illegal control clause");
if isForStat {
P.expect(token.SEMICOLON);
if P.tok != token.LBRACE {
post = P.parseSimpleStat(0);
}
}
} else {
if init != nil { // guard in case of errors
if s, is_expr_stat := init.(*ast.ExpressionStat); is_expr_stat {
expr, init = s.Expr, nil;
} else {
P.error(noloc, "illegal control clause");
}
}
}
}
P.expr_lev = prev_lev;
}
@ -1274,6 +1263,29 @@ func (P *Parser) parseForStat() *ast.ForStat {
}
func (P *Parser) asIdent(x ast.Expr) *ast.Ident {
if name, ok := x.(*ast.Ident); ok {
return name;
}
P.error(x.Loc(), "identifier expected");
return &ast.Ident{noloc, "BAD"};
}
func (P *Parser) isTypeSwitch(init ast.Stat) (lhs *ast.Ident, rhs ast.Expr) {
if assign, ok := init.(*ast.AssignmentStat); ok {
if guard, ok := assign.Rhs.(*ast.TypeGuard); ok {
if tmp, ok := guard.Typ.(*ast.TypeType); ok {
// we appear to have a type switch
// TODO various error checks
return P.asIdent(assign.Lhs), guard.X;
}
}
}
return nil, nil;
}
func (P *Parser) parseCaseClause() *ast.CaseClause {
if P.trace {
defer un(trace(P, "CaseClause"));
@ -1281,15 +1293,15 @@ func (P *Parser) parseCaseClause() *ast.CaseClause {
// SwitchCase
loc := P.loc;
var expr ast.Expr;
var x []ast.Expr;
if P.tok == token.CASE {
P.next();
expr = P.parseExpressionList();
x = P.parseExpressionList();
} else {
P.expect(token.DEFAULT);
}
return &ast.CaseClause{loc, expr, P.parseBlock(token.COLON)};
return &ast.CaseClause{loc, x, P.parseBlock(token.COLON)};
}
@ -1310,37 +1322,53 @@ func (P *Parser) parseSwitchStat() *ast.SwitchStat {
P.expect(token.RBRACE);
P.opt_semi = true;
if lhs, rhs := P.isTypeSwitch(init); lhs != nil {
if tag != nil {
P.error(loc, "illegal type switch clause");
}
// TODO fix location
init = &ast.TypeSwitchClause{loc, lhs, rhs};
}
return &ast.SwitchStat{loc, init, tag, body};
}
func (P *Parser) parseCommClause() *ast.CaseClause {
func (P *Parser) parseCommClause() *ast.CommClause {
if P.trace {
defer un(trace(P, "CommClause"));
}
// CommCase
loc := P.loc;
var expr ast.Expr;
var tok int;
var lhs, rhs ast.Expr;
if P.tok == token.CASE {
P.next();
x := P.parseExpression(1);
if P.tok == token.ASSIGN || P.tok == token.DEFINE {
loc, tok := P.loc, P.tok;
P.next();
if P.tok == token.ARROW {
y := P.parseExpression(1);
x = &ast.BinaryExpr{loc, tok, x, y};
} else {
P.expect(token.ARROW); // use expect() error handling
if P.tok == token.ARROW {
// RecvExpr without assignment
rhs = P.parseExpression(1);
} else {
// SendExpr or RecvExpr
rhs = P.parseExpression(1);
if P.tok == token.ASSIGN || P.tok == token.DEFINE {
// RecvExpr with assignment
tok = P.tok;
P.next();
lhs = rhs;
if P.tok == token.ARROW {
rhs = P.parseExpression(1);
} else {
P.expect(token.ARROW); // use expect() error handling
}
}
// else SendExpr
}
expr = x;
} else {
P.expect(token.DEFAULT);
}
return &ast.CaseClause{loc, expr, P.parseBlock(token.COLON)};
return &ast.CommClause{loc, tok, lhs, rhs, P.parseBlock(token.COLON)};
}
@ -1437,15 +1465,15 @@ func (P *Parser) parseConstSpec(loc scanner.Location, comment ast.CommentGroup)
defer un(trace(P, "ConstSpec"));
}
idents := P.parseIdentList2(nil);
names := P.parseIdentList(nil);
typ := P.tryType();
var vals ast.Expr;
var values []ast.Expr;
if typ != nil || P.tok == token.ASSIGN {
P.expect(token.ASSIGN);
vals = P.parseExpressionList();
values = P.parseExpressionList();
}
return &ast.ConstDecl{loc, idents, typ, vals, comment};
return &ast.ConstDecl{loc, names, typ, values, comment};
}
@ -1466,15 +1494,15 @@ func (P *Parser) parseVarSpec(loc scanner.Location, comment ast.CommentGroup) *a
defer un(trace(P, "VarSpec"));
}
idents := P.parseIdentList2(nil);
names := P.parseIdentList(nil);
typ := P.tryType();
var vals ast.Expr;
var values []ast.Expr;
if typ == nil || P.tok == token.ASSIGN {
P.expect(token.ASSIGN);
vals = P.parseExpressionList();
values = P.parseExpressionList();
}
return &ast.VarDecl{loc, idents, typ, vals, comment};
return &ast.VarDecl{loc, names, typ, values, comment};
}

View File

@ -463,6 +463,18 @@ func (P *Printer) Idents(list []*ast.Ident, full bool) int {
}
func (P *Printer) Exprs(list []ast.Expr) {
for i, x := range list {
if i > 0 {
P.Token(noloc, token.COMMA);
P.separator = blank;
P.state = inside_list;
}
P.Expr(x);
}
}
func (P *Printer) Parameters(list []*ast.Field) {
P.Token(noloc, token.LPAREN);
if len(list) > 0 {
@ -856,6 +868,30 @@ func (P *Printer) DoExpressionStat(s *ast.ExpressionStat) {
}
func (P *Printer) DoAssignmentStat(s *ast.AssignmentStat) {
P.Expr(s.Lhs);
P.separator = blank;
P.Token(s.Loc, s.Tok);
P.separator = blank;
P.Expr(s.Rhs);
}
func (P *Printer) DoTupleAssignStat(s *ast.TupleAssignStat) {
P.Exprs(s.Lhs);
P.separator = blank;
P.Token(s.Loc, s.Tok);
P.separator = blank;
P.Exprs(s.Rhs);
}
func (P *Printer) DoIncDecStat(s *ast.IncDecStat) {
P.Expr(s.Expr);
P.Token(s.Loc, s.Tok);
}
func (P *Printer) DoCompositeStat(s *ast.CompositeStat) {
P.Block(s.Body, true);
}
@ -868,6 +904,12 @@ func (P *Printer) ControlClause(isForStat bool, init ast.Stat, expr ast.Expr, po
if expr != nil {
P.Expr(expr);
}
} else if range_clause, ok := init.(*ast.RangeClause); ok {
// range clause
P.Stat(range_clause);
} else if typeswitch_clause, ok := init.(*ast.TypeSwitchClause); ok {
// type switch clause
P.Stat(typeswitch_clause);
} else {
// all semicolons required
// (they are not separators, print them explicitly)
@ -906,6 +948,17 @@ func (P *Printer) DoIfStat(s *ast.IfStat) {
}
func (P *Printer) DoRangeClause(s *ast.RangeClause) {
P.Exprs(s.Lhs);
P.separator = blank;
P.Token(s.Loc, s.Tok);
P.separator = blank;
P.Token(noloc, token.RANGE);
P.separator = blank;
P.Expr(s.Rhs);
}
func (P *Printer) DoForStat(s *ast.ForStat) {
P.Token(s.Loc, token.FOR);
P.ControlClause(true, s.Init, s.Cond, s.Post);
@ -913,11 +966,24 @@ func (P *Printer) DoForStat(s *ast.ForStat) {
}
func (P *Printer) DoTypeSwitchClause(s *ast.TypeSwitchClause) {
P.Expr(s.Lhs);
P.separator = blank;
P.Token(s.Loc, token.DEFINE);
P.separator = blank;
P.Expr(s.Rhs);
P.Token(s.Loc, token.PERIOD);
P.Token(s.Loc, token.LPAREN);
P.Token(s.Loc, token.TYPE);
P.Token(s.Loc, token.RPAREN);
}
func (P *Printer) DoCaseClause(s *ast.CaseClause) {
if s.Expr != nil {
if s.Values != nil {
P.Token(s.Loc, token.CASE);
P.separator = blank;
P.Expr(s.Expr);
P.Exprs(s.Values);
} else {
P.Token(s.Loc, token.DEFAULT);
}
@ -938,6 +1004,37 @@ func (P *Printer) DoSwitchStat(s *ast.SwitchStat) {
}
func (P *Printer) DoTypeSwitchStat(s *ast.SwitchStat) {
P.Token(s.Loc, token.SWITCH);
P.ControlClause(false, s.Init, s.Tag, nil);
P.Block(s.Body, false);
}
func (P *Printer) DoCommClause(s *ast.CommClause) {
if s.Rhs != nil {
P.Token(s.Loc, token.CASE);
P.separator = blank;
if s.Lhs != nil {
P.Expr(s.Lhs);
P.separator = blank;
P.Token(noloc, s.Tok);
P.separator = blank;
}
P.Expr(s.Rhs);
} else {
P.Token(s.Loc, token.DEFAULT);
}
// TODO: try to use P.Block instead
// P.Block(s.Body, true);
P.Token(s.Body.Loc, token.COLON);
P.indentation++;
P.StatementList(s.Body.List);
P.indentation--;
P.newlines = 1;
}
func (P *Printer) DoSelectStat(s *ast.SelectStat) {
P.Token(s.Loc, token.SELECT);
P.separator = blank;
@ -954,6 +1051,13 @@ func (P *Printer) DoControlFlowStat(s *ast.ControlFlowStat) {
}
func (P *Printer) DoReturnStat(s *ast.ReturnStat) {
P.Token(s.Loc, token.RETURN);
P.separator = blank;
P.Exprs(s.Results);
}
func (P *Printer) DoEmptyStat(s *ast.EmptyStat) {
P.String(s.Loc, "");
}
@ -999,11 +1103,11 @@ func (P *Printer) DoConstDecl(d *ast.ConstDecl) {
P.separator = blank; // TODO switch to tab? (indentation problem with structs)
P.Expr(d.Typ);
}
if d.Vals != nil {
if d.Values != nil {
P.separator = tab;
P.Token(noloc, token.ASSIGN);
P.separator = blank;
P.Expr(d.Vals);
P.Exprs(d.Values);
}
P.newlines = 2;
}
@ -1032,11 +1136,11 @@ func (P *Printer) DoVarDecl(d *ast.VarDecl) {
P.Expr(d.Typ);
//P.separator = P.Type(d.Typ);
}
if d.Vals != nil {
if d.Values != nil {
P.separator = tab;
P.Token(noloc, token.ASSIGN);
P.separator = blank;
P.Expr(d.Vals);
P.Exprs(d.Values);
}
P.newlines = 2;
}