func TestProperty(t *testing.T) {
testStr := `<?
$res = $var->go;
$var->go = $res;`
p := NewParser(testStr)
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse()
if len(a) != 2 {
t.Fatalf("Property did not correctly parse")
}
tree := ast.ExpressionStmt{ast.AssignmentExpression{
Assignee: ast.NewVariable("res"),
Operator: "=",
Value: &ast.PropertyExpression{
Receiver: ast.NewVariable("var"),
Name: ast.Identifier{Value: "go"},
},
}}
if !assertEquals(a[0], tree) {
t.Fatalf("Property did not correctly parse")
}
tree = ast.ExpressionStmt{ast.AssignmentExpression{
Assignee: &ast.PropertyExpression{
Receiver: ast.NewVariable("var"),
Name: ast.Identifier{Value: "go"},
},
Operator: "=",
Value: ast.NewVariable("res"),
}}
if !assertEquals(a[1], tree) {
t.Fatalf("Property did not correctly parse")
}
}
func TestForeachLoop(t *testing.T) {
testStr := `<?
foreach ($arr as $key => $val) {
echo $key . $val;
} ?>`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) == 0 {
t.Fatalf("While loop did not correctly parse")
}
tree := &ast.ForeachStmt{
Source: ast.NewVariable("arr"),
Key: ast.NewVariable("key"),
Value: ast.NewVariable("val"),
LoopBlock: &ast.Block{
Statements: []ast.Statement{ast.Echo(ast.BinaryExpr{
Operator: ".",
Antecedent: ast.NewVariable("key"),
Subsequent: ast.NewVariable("val"),
Type: ast.String,
})},
},
}
if !assertEquals(a.Nodes[0], tree) {
t.Fatalf("Foreach did not correctly parse")
}
}
func TestWhileLoopWithAssignment(t *testing.T) {
testStr := `<?
while ($var = mysql_assoc()) {
echo $var;
}`
p := NewParser(testStr)
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("While loop did not correctly parse")
}
tree := &ast.WhileStmt{
Termination: ast.AssignmentExpression{
Assignee: ast.NewVariable("var"),
Value: &ast.FunctionCallExpression{
FunctionName: ast.Identifier{Value: "mysql_assoc"},
Arguments: make([]ast.Expression, 0),
},
Operator: "=",
},
LoopBlock: &ast.Block{
Statements: []ast.Statement{
ast.Echo(ast.NewVariable("var")),
},
},
}
if !assertEquals(a[0], tree) {
t.Fatalf("While loop with assignment did not correctly parse")
}
}
func TestForeachLoop(t *testing.T) {
testStr := `<?
foreach ($arr as $key => $val) {
echo $key . $val;
} ?>`
p := NewParser(testStr)
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("While loop did not correctly parse")
}
tree := &ast.ForeachStmt{
Source: ast.NewVariable("arr"),
Key: ast.NewVariable("key"),
Value: ast.NewVariable("val"),
LoopBlock: &ast.Block{
Statements: []ast.Statement{ast.Echo(ast.OperatorExpression{
Operator: ".",
Operand1: ast.NewVariable("key"),
Operand2: ast.NewVariable("val"),
Type: ast.String,
})},
},
}
if !assertEquals(a[0], tree) {
t.Fatalf("Foreach did not correctly parse")
}
}
func (p *Parser) parseForeach() ast.Statement {
stmt := &ast.ForeachStmt{}
p.expect(token.OpenParen)
stmt.Source = p.parseNextExpression()
p.expect(token.AsOperator)
if p.peek().typ == token.AmpersandOperator {
p.expect(token.AmpersandOperator)
}
p.expect(token.VariableOperator)
p.next()
first := ast.NewVariable(p.current.val)
if p.peek().typ == token.ArrayKeyOperator {
stmt.Key = first
p.expect(token.ArrayKeyOperator)
if p.peek().typ == token.AmpersandOperator {
p.expect(token.AmpersandOperator)
}
p.expect(token.VariableOperator)
p.next()
stmt.Value = ast.NewVariable(p.current.val)
} else {
stmt.Value = first
}
p.expect(token.CloseParen)
p.next()
stmt.LoopBlock = p.parseControlBlock(token.EndForeach)
return stmt
}
func TestInstantiation(t *testing.T) {
testStr := `<?
$obj = new Obj::$classes['obj']($arg);`
p := NewParser(testStr)
a, errs := p.Parse()
if len(errs) != 0 {
t.Fatalf("Did not parse instantiation correctly: %s", errs)
}
tree := ast.ExpressionStmt{ast.AssignmentExpression{
Operator: "=",
Assignee: ast.NewVariable("obj"),
Value: &ast.NewExpression{
Class: ast.NewClassExpression("Obj", &ast.ArrayLookupExpression{
Array: ast.NewVariable("classes"),
Index: &ast.Literal{Type: ast.String, Value: `'obj'`},
}),
Arguments: []ast.Expression{
ast.NewVariable("arg"),
},
},
}}
if !assertEquals(a[0], tree) {
t.Fatalf("Instantiation did not parse correctly")
}
}
func TestMethodCall(t *testing.T) {
testStr := `<?
$res = $var->go();`
p := NewParser(testStr)
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("Method call did not correctly parse")
}
tree := ast.ExpressionStmt{ast.AssignmentExpression{
Assignee: ast.NewVariable("res"),
Operator: "=",
Value: &ast.MethodCallExpression{
Receiver: ast.NewVariable("var"),
FunctionCallExpression: &ast.FunctionCallExpression{
FunctionName: ast.Identifier{Value: "go"},
Arguments: make([]ast.Expression, 0),
},
},
}}
if !assertEquals(a[0], tree) {
t.Fatalf("Method call did not correctly parse")
}
}
func TestList(t *testing.T) {
testStr := `<?
list($one, $two) = array(1, 2);`
p := NewParser()
a, err := p.Parse("test.php", testStr)
if err != nil {
t.Fatalf("Did not parse list correctly: %s", err)
}
tree := ast.ExpressionStmt{&ast.ListStatement{
Operator: "=",
Assignees: []ast.Assignable{
ast.NewVariable("one"),
ast.NewVariable("two"),
},
Value: &ast.ArrayExpression{
Pairs: []ast.ArrayPair{
{Key: nil, Value: &ast.Literal{Value: "1", Type: ast.Float}},
{Key: nil, Value: &ast.Literal{Value: "2", Type: ast.Float}},
},
},
}}
if !assertEquals(a.Nodes[0], tree) {
t.Fatalf("Array bracked did not parse correctly")
}
}
func TestGlobal(t *testing.T) {
testStr := `<?
global $var, $otherVar;`
p := NewParser(testStr)
a, _ := p.Parse()
tree := &ast.GlobalDeclaration{
Identifiers: []*ast.Variable{
ast.NewVariable("var"),
ast.NewVariable("otherVar"),
},
}
if !assertEquals(a[0], tree) {
t.Fatalf("Global did not parse correctly")
}
}
func TestArray(t *testing.T) {
testStr := `<?
$var = array("one", "two", "three");`
p := NewParser(testStr)
p.Debug = true
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("Array did not correctly parse")
}
tree := ast.ExpressionStmt{
ast.AssignmentExpression{
Assignee: ast.NewVariable("var"),
Operator: "=",
Value: &ast.ArrayExpression{
ast.BaseNode{},
ast.ArrayType{},
[]ast.ArrayPair{
{Value: &ast.Literal{Type: ast.String, Value: `"one"`}},
{Value: &ast.Literal{Type: ast.String, Value: `"two"`}},
{Value: &ast.Literal{Type: ast.String, Value: `"three"`}},
},
},
},
}
if !reflect.DeepEqual(a[0], tree) {
fmt.Printf("Found: %+v\n", a[0])
fmt.Printf("Expected: %+v\n", tree)
t.Fatalf("Array did not correctly parse")
}
}
func (p *Parser) parseIdentifier() (expr ast.Expr) {
switch typ := p.peek().Typ; {
case typ == token.OpenParen && !p.instantiation:
// Function calls are okay here because we know they came with
// a non-dynamic identifier.
expr = p.parseFunctionCall(&ast.Identifier{Value: p.current.Val})
p.next()
case typ == token.ScopeResolutionOperator:
classIdent := p.current.Val
p.next() // get onto ::, then we get to the next expr
p.next()
expr = ast.NewClassExpression(classIdent, p.parseOperand())
p.next()
case p.instantiation:
defer p.next()
return &ast.Identifier{Value: p.current.Val}
default:
name := p.current.Val
v := ast.NewVariable(p.current.Val)
expr = ast.ConstantExpr{
Variable: v,
}
p.namespace.Constants[name] = append(p.namespace.Constants[name], v)
p.next()
}
return expr
}
func TestArrayKeys(t *testing.T) {
testStr := `<?
$var = array(1 => "one", 2 => "two", 3 => "three");`
p := NewParser(testStr)
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("Array did not correctly parse")
}
tree := ast.ExpressionStmt{ast.AssignmentExpression{
Assignee: ast.NewVariable("var"),
Operator: "=",
Value: &ast.ArrayExpression{
ast.BaseNode{},
ast.ArrayType{},
[]ast.ArrayPair{
{Key: &ast.Literal{Type: ast.Float, Value: "1"}, Value: &ast.Literal{Type: ast.String, Value: `"one"`}},
{Key: &ast.Literal{Type: ast.Float, Value: "2"}, Value: &ast.Literal{Type: ast.String, Value: `"two"`}},
{Key: &ast.Literal{Type: ast.Float, Value: "3"}, Value: &ast.Literal{Type: ast.String, Value: `"three"`}},
},
},
}}
if !assertEquals(a[0], tree) {
t.Fatalf("Array did not correctly parse")
}
}
func TestArrayBracket(t *testing.T) {
testStr := `<?
$arr = ["one", "two"];
$arr2 = ["one" => 1, "two" => 2];`
p := NewParser()
a, err := p.Parse("test.php", testStr)
if err != nil {
t.Fatalf("Did not parse array bracket correctly: %s", err)
}
tree := []ast.Statement{
ast.ExpressionStmt{ast.AssignmentExpression{
Operator: "=",
Assignee: ast.NewVariable("arr"),
Value: &ast.ArrayExpression{
Pairs: []ast.ArrayPair{
{Key: nil, Value: &ast.Literal{Value: `"one"`, Type: ast.String}},
{Key: nil, Value: &ast.Literal{Value: `"two"`, Type: ast.String}},
},
},
}},
ast.ExpressionStmt{ast.AssignmentExpression{
Operator: "=",
Assignee: ast.NewVariable("arr2"),
Value: &ast.ArrayExpression{
Pairs: []ast.ArrayPair{
{
Key: &ast.Literal{Value: `"one"`, Type: ast.String},
Value: &ast.Literal{Value: "1", Type: ast.Float},
},
{
Key: &ast.Literal{Value: `"two"`, Type: ast.String},
Value: &ast.Literal{Value: "2", Type: ast.Float},
},
},
},
}},
}
if !assertEquals(a.Nodes[0], tree[0]) {
t.Fatalf("Array bracked did not parse correctly")
}
if !assertEquals(a.Nodes[1], tree[1]) {
t.Fatalf("Array bracked did not parse correctly")
}
}
func TestFunction(t *testing.T) {
testStr := `<?php
function TestFn($arg) {
echo $arg;
}
$var = TestFn("world", 0);`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
tree := []ast.Node{
&ast.FunctionStmt{
FunctionDefinition: &ast.FunctionDefinition{
Name: "TestFn",
Arguments: []*ast.FunctionArgument{
{
Variable: ast.NewVariable("arg"),
},
},
},
Body: &ast.Block{
Statements: []ast.Statement{ast.Echo(ast.NewVariable("arg"))},
},
},
ast.ExprStmt{
ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: &ast.FunctionCallExpr{
FunctionName: &ast.Identifier{Value: "TestFn"},
Arguments: []ast.Expr{
&ast.Literal{Type: ast.String, Value: `"world"`},
&ast.Literal{Type: ast.Float, Value: "0"},
},
},
Operator: "=",
},
},
}
if len(a.Nodes) != 2 {
t.Fatalf("Function did not correctly parse")
}
if !assertEquals(a.Nodes[0], tree[0]) {
t.Fatalf("Function did not correctly parse")
}
if !assertEquals(a.Nodes[1], tree[1]) {
t.Fatalf("Function assignment did not correctly parse")
}
}
func TestScopeResolutionOperator(t *testing.T) {
testStr := `<?
MyClass::myfunc($var);
echo MyClass::myconst;
echo $var::myfunc();`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
tree := []ast.Node{
ast.ExprStmt{
&ast.ClassExpr{
Receiver: &ast.Identifier{Value: "MyClass"},
Expr: &ast.FunctionCallExpr{
FunctionName: &ast.Identifier{Value: "myfunc"},
Arguments: []ast.Expr{
ast.NewVariable("var"),
},
},
},
},
ast.Echo(&ast.ClassExpr{
Receiver: &ast.Identifier{Value: "MyClass"},
Expr: ast.ConstantExpr{
ast.NewVariable("myconst"),
},
}),
ast.Echo(&ast.ClassExpr{
Receiver: ast.NewVariable("var"),
Expr: &ast.FunctionCallExpr{
FunctionName: &ast.Identifier{Value: "myfunc"},
Arguments: []ast.Expr{},
},
}),
}
if !assertEquals(a.Nodes[0], tree[0]) {
t.Fatalf("Scope resolution operator function call did not correctly parse")
}
if !assertEquals(a.Nodes[1], tree[1]) {
t.Fatalf("Scope resolution operator expression did not correctly parse")
}
if !assertEquals(a.Nodes[2], tree[2]) {
t.Fatalf("Scope resolution operator function call on identifier did not correctly parse")
}
}
func TestArrayLookup(t *testing.T) {
testStr := `<?
echo $arr['one'][$two];
$var->arr[] = 2;
echo $arr[2 + 1];`
p := NewParser()
p.disableScoping = true
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) == 0 {
t.Fatalf("Array lookup did not correctly parse")
}
tree := []ast.Node{
ast.EchoStmt{
Expressions: []ast.Expr{&ast.ArrayLookupExpr{
Array: &ast.ArrayLookupExpr{
Array: ast.NewVariable("arr"),
Index: &ast.Literal{Type: ast.String, Value: `'one'`},
},
Index: ast.NewVariable("two"),
}},
},
ast.ExprStmt{
ast.AssignmentExpr{
Assignee: ast.ArrayAppendExpr{
Array: &ast.PropertyCallExpr{
Receiver: ast.NewVariable("var"),
Name: &ast.Identifier{Value: "arr"},
},
},
Operator: "=",
Value: &ast.Literal{Type: ast.Float, Value: "2"},
},
},
}
if !assertEquals(a.Nodes[0], tree[0]) {
t.Fatalf("Array lookup did not correctly parse")
}
if !assertEquals(a.Nodes[1], tree[1]) {
t.Fatalf("Array append expression did not correctly parse")
}
}
func TestForLoop(t *testing.T) {
testStr := `<?
for ($i = 0; $i < 10; $i++) {
echo $i;
}`
p := NewParser()
p.disableScoping = true
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) == 0 {
t.Fatalf("For loop did not correctly parse")
}
tree := &ast.ForStmt{
Initialization: []ast.Expr{ast.AssignmentExpr{
Assignee: ast.NewVariable("i"),
Value: &ast.Literal{Type: ast.Float, Value: "0"},
Operator: "=",
}},
Termination: []ast.Expr{ast.BinaryExpr{
Antecedent: ast.NewVariable("i"),
Subsequent: &ast.Literal{Type: ast.Float, Value: "10"},
Operator: "<",
Type: ast.Boolean,
}},
Iteration: []ast.Expr{ast.UnaryCallExpr{
Operator: "++",
Operand: ast.NewVariable("i"),
Preceding: false,
}},
LoopBlock: &ast.Block{
Statements: []ast.Statement{
ast.Echo(ast.NewVariable("i")),
},
},
}
if !assertEquals(a.Nodes[0], tree) {
t.Fatalf("For did not correctly parse")
}
}
func TestLiterals(t *testing.T) {
testStr := `<?
$var = "one";
$var = 2;
$var = true;
$var = null;`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) != 4 {
t.Fatalf("Literals did not correctly parse")
}
tree := []ast.Node{
ast.ExprStmt{ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: &ast.Literal{Type: ast.String, Value: `"one"`},
Operator: "=",
}},
ast.ExprStmt{ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: &ast.Literal{Type: ast.Float, Value: "2"},
Operator: "=",
}},
ast.ExprStmt{ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: &ast.Literal{Type: ast.Boolean, Value: "true"},
Operator: "=",
}},
ast.ExprStmt{ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: &ast.Literal{Type: ast.Null, Value: "null"},
Operator: "=",
}},
}
if !reflect.DeepEqual(a.Nodes, tree) {
fmt.Printf("Found: %+v\n", a)
fmt.Printf("Expected: %+v\n", tree)
t.Fatalf("Literals did not correctly parse")
}
}
func TestForLoop(t *testing.T) {
testStr := `<?
for ($i = 0; $i < 10; $i++) {
echo $i;
}`
p := NewParser(testStr)
p.Debug = true
p.MaxErrors = 0
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("For loop did not correctly parse")
}
tree := &ast.ForStmt{
Initialization: []ast.Expression{ast.AssignmentExpression{
Assignee: ast.NewVariable("i"),
Value: &ast.Literal{Type: ast.Float, Value: "0"},
Operator: "=",
}},
Termination: []ast.Expression{ast.OperatorExpression{
Operand1: ast.NewVariable("i"),
Operand2: &ast.Literal{Type: ast.Float, Value: "10"},
Operator: "<",
Type: ast.Boolean,
}},
Iteration: []ast.Expression{ast.OperatorExpression{
Operator: "++",
Operand1: ast.NewVariable("i"),
Type: ast.Numeric,
}},
LoopBlock: &ast.Block{
Statements: []ast.Statement{
ast.Echo(ast.NewVariable("i")),
},
},
}
if !assertEquals(a[0], tree) {
t.Fatalf("For did not correctly parse")
}
}
func TestWhileLoop(t *testing.T) {
testStr := `<?
while ($otherVar) {
echo $var;
}`
p := NewParser(testStr)
a, _ := p.Parse()
if len(a) == 0 {
t.Fatalf("While loop did not correctly parse")
}
tree := &ast.WhileStmt{
Termination: ast.NewVariable("otherVar"),
LoopBlock: &ast.Block{
Statements: []ast.Statement{
ast.Echo(ast.NewVariable("var")),
},
},
}
if !assertEquals(a[0], tree) {
t.Fatalf("TestLoop did not correctly parse")
}
}
func (p *Parser) parseInterface() *ast.Interface {
i := &ast.Interface{
Inherits: make([]string, 0),
}
p.expect(token.Identifier)
i.Name = p.current.val
if p.peek().typ == token.Extends {
p.expect(token.Extends)
for {
p.expect(token.Identifier)
i.Inherits = append(i.Inherits, p.current.val)
if p.peek().typ != token.Comma {
break
}
p.expect(token.Comma)
}
}
p.expect(token.BlockBegin)
for p.peek().typ != token.BlockEnd {
vis, _ := p.parseVisibility()
if p.peek().typ == token.Static {
p.next()
}
p.next()
switch p.current.typ {
case token.Function:
f := p.parseFunctionDefinition()
m := ast.Method{
Visibility: vis,
FunctionStmt: &ast.FunctionStmt{FunctionDefinition: f},
}
i.Methods = append(i.Methods, m)
p.expect(token.StatementEnd)
case token.Const:
constant := ast.Constant{}
p.expect(token.Identifier)
constant.Variable = ast.NewVariable(p.current.val)
if p.peek().typ == token.AssignmentOperator {
p.expect(token.AssignmentOperator)
constant.Value = p.parseNextExpression()
}
i.Constants = append(i.Constants, constant)
p.expect(token.StatementEnd)
default:
p.errorf("unexpected interface member %v", p.current)
}
}
p.expect(token.BlockEnd)
return i
}
func TestDoLoop(t *testing.T) {
testStr := `<?
do {
echo $var;
} while ($otherVar);`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) == 0 {
t.Fatalf("Do loop did not correctly parse")
}
tree := &ast.DoWhileStmt{
Termination: ast.NewVariable("otherVar"),
LoopBlock: &ast.Block{
Statements: []ast.Statement{
ast.Echo(ast.NewVariable("var")),
},
},
}
if !assertEquals(a.Nodes[0], tree) {
t.Fatalf("TestLoop did not correctly parse")
}
}
func TestSwitch(t *testing.T) {
testStr := `<?
switch ($var) {
case 1:
echo "one";
case 2: {
echo "two";
}
default:
echo "def";
}`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
if len(a.Nodes) == 0 {
t.Fatalf("Array lookup did not correctly parse")
}
tree := ast.SwitchStmt{
Expr: ast.NewVariable("var"),
Cases: []*ast.SwitchCase{
{
Expr: &ast.Literal{Type: ast.Float, Value: "1"},
Block: ast.Block{
Statements: []ast.Statement{
ast.Echo(&ast.Literal{Type: ast.String, Value: `"one"`}),
},
},
},
{
Expr: &ast.Literal{Type: ast.Float, Value: "2"},
Block: ast.Block{
Statements: []ast.Statement{
ast.Echo(&ast.Literal{Type: ast.String, Value: `"two"`}),
},
},
},
},
DefaultCase: &ast.Block{
Statements: []ast.Statement{
ast.Echo(&ast.Literal{Type: ast.String, Value: `"def"`}),
},
},
}
if !assertEquals(a.Nodes[0], tree) {
t.Fatalf("Switch did not correctly parse")
}
}
func (p *Parser) parseVariable() ast.Expression {
p.expectCurrent(token.VariableOperator)
switch p.next(); {
case isKeyword(p.current.typ, p.current.val):
// keywords are all valid variable names
fallthrough
case p.current.typ == token.Identifier:
expr := ast.NewVariable(p.current.val)
return expr
case p.current.typ == token.BlockBegin:
expr := &ast.Variable{Name: p.parseNextExpression()}
p.expect(token.BlockEnd)
return expr
case p.current.typ == token.VariableOperator:
return &ast.Variable{Name: p.parseVariable()}
default:
p.errorf("unexpected variable operand %s", p.current)
return nil
}
}
func (p *Parser) parseFunctionArgument() *ast.FunctionArgument {
arg := &ast.FunctionArgument{}
switch p.peek().Typ {
case token.Identifier, token.Array, token.Self:
p.next()
arg.TypeHint = p.current.Val
}
if p.peek().Typ == token.AmpersandOperator {
p.next()
}
p.expect(token.VariableOperator)
p.next()
arg.Variable = ast.NewVariable(p.current.Val)
if p.peek().Typ == token.AssignmentOperator {
p.expect(token.AssignmentOperator)
p.next()
arg.Default = p.parseExpression()
}
return arg
}
func TestCastOperator(t *testing.T) {
testStr := `<?
$var = (double) 1.0; ?>`
p := NewParser(testStr)
a, _ := p.Parse()
tree := []ast.Node{
ast.ExpressionStmt{ast.AssignmentExpression{
Assignee: ast.NewVariable("var"),
Value: ast.OperatorExpression{
Operand1: &ast.Literal{Type: ast.Float, Value: "1.0"},
Operator: "(double)",
Type: ast.Numeric,
},
Operator: "=",
}},
}
if !assertEquals(a[0], tree[0]) {
t.Fatalf("Cast operator parsing failed")
}
}
func TestCastOperator(t *testing.T) {
testStr := `<?
$var = (double) 1.0; ?>`
p := NewParser()
p.disableScoping = true
a, _ := p.Parse("test.php", testStr)
tree := []ast.Node{
ast.ExprStmt{ast.AssignmentExpr{
Assignee: ast.NewVariable("var"),
Value: ast.UnaryCallExpr{
Operand: &ast.Literal{Type: ast.Float, Value: "1.0"},
Operator: "(double)",
Preceding: false,
},
Operator: "=",
}},
}
if !assertEquals(a.Nodes[0], tree[0]) {
t.Fatalf("Cast operator parsing failed")
}
}
func (p *Parser) parseIdentifier() (expr ast.Expression) {
switch p.peek().typ {
case token.OpenParen:
// Function calls are okay here because we know they came with
// a non-dynamic identifier.
expr = p.parseFunctionCall(ast.Identifier{Value: p.current.val})
p.next()
case token.ScopeResolutionOperator:
classIdent := p.current.val
p.next() // get onto ::, then we get to the next expr
p.next()
expr = ast.NewClassExpression(classIdent, p.parseOperand())
p.next()
default:
expr = ast.ConstantExpression{
Variable: ast.NewVariable(p.current.val),
}
p.next()
}
return expr
}
func (p *Parser) parseStmt() ast.Statement {
switch p.current.Typ {
case token.BlockBegin:
p.backup()
return p.parseBlock()
case token.Global:
p.next()
g := &ast.GlobalDeclaration{
Identifiers: make([]*ast.Variable, 0, 1),
}
for p.current.Typ == token.VariableOperator {
variable, ok := p.parseVariable().(*ast.Variable)
if !ok {
p.errorf("global declarations must be of standard variables")
break
}
g.Identifiers = append(g.Identifiers, variable)
if p.peek().Typ != token.Comma {
break
}
p.expect(token.Comma)
p.next()
}
p.expectStmtEnd()
return g
case token.Static:
if p.peek().Typ == token.ScopeResolutionOperator {
p.errorf("static keyword outside of class context")
expr := p.parseExpression()
p.expectStmtEnd()
return expr
}
s := &ast.StaticVariableDeclaration{Declarations: make([]ast.Dynamic, 0)}
for {
p.next()
v, ok := p.parseVariable().(*ast.Variable)
if !ok {
p.errorf("global static declaration must be a variable")
return nil
}
if _, ok := v.Name.(*ast.Identifier); !ok {
p.errorf("static variable declarations must not be dynamic")
}
// check if there's an initial assignment
if p.peek().Typ == token.AssignmentOperator {
p.expect(token.AssignmentOperator)
op := p.current.Val
p.expect(token.Null, token.StringLiteral, token.BooleanLiteral, token.NumberLiteral, token.Array)
switch p.current.Typ {
case token.Array:
s.Declarations = append(s.Declarations, &ast.AssignmentExpr{Assignee: v, Value: p.parseArrayDeclaration(), Operator: op})
default:
s.Declarations = append(s.Declarations, &ast.AssignmentExpr{Assignee: v, Value: p.parseLiteral(), Operator: op})
}
} else {
s.Declarations = append(s.Declarations, v)
}
if p.peek().Typ != token.Comma {
break
}
p.next()
}
p.expectStmtEnd()
return s
case token.VariableOperator, token.UnaryOperator:
expr := ast.ExprStmt{p.parseExpression()}
p.expectStmtEnd()
return expr
case token.Print:
requireParen := false
if p.peek().Typ == token.OpenParen {
p.expect(token.OpenParen)
requireParen = true
}
stmt := ast.Echo(p.parseNextExpression())
if requireParen {
p.expect(token.CloseParen)
}
p.expectStmtEnd()
return stmt
case token.Function:
return p.parseFunctionStmt(false)
case token.PHPEnd:
if p.peek().Typ == token.EOF {
return nil
}
var expr ast.Statement
if p.accept(token.HTML) {
expr = ast.Echo(&ast.Literal{Type: ast.String, Value: p.current.Val})
}
p.next()
if p.current.Typ != token.EOF {
p.expectCurrent(token.PHPBegin)
}
return expr
case token.Echo:
exprs := []ast.Expr{
p.parseNextExpression(),
}
for p.peek().Typ == token.Comma {
p.expect(token.Comma)
exprs = append(exprs, p.parseNextExpression())
}
p.expectStmtEnd()
echo := ast.Echo(exprs...)
return echo
case token.If:
return p.parseIf()
case token.While:
return p.parseWhile()
case token.Do:
return p.parseDo()
case token.For:
return p.parseFor()
case token.Foreach:
return p.parseForeach()
case token.Switch:
return p.parseSwitch()
case token.Abstract, token.Final, token.Class:
return p.parseClass()
case token.Interface:
return p.parseInterface()
case token.Return:
p.next()
stmt := &ast.ReturnStmt{}
if p.current.Typ != token.StatementEnd {
stmt.Expr = p.parseExpression()
p.expectStmtEnd()
}
return stmt
case token.Break:
p.next()
stmt := &ast.BreakStmt{}
if p.current.Typ != token.StatementEnd {
stmt.Expr = p.parseExpression()
p.expectStmtEnd()
}
return stmt
case token.Continue:
p.next()
stmt := &ast.ContinueStmt{}
if p.current.Typ != token.StatementEnd {
stmt.Expr = p.parseExpression()
p.expectStmtEnd()
}
return stmt
case token.Throw:
stmt := ast.ThrowStmt{Expr: p.parseNextExpression()}
p.expectStmtEnd()
return stmt
case token.Exit:
stmt := &ast.ExitStmt{}
if p.peek().Typ == token.OpenParen {
p.expect(token.OpenParen)
if p.peek().Typ != token.CloseParen {
stmt.Expr = p.parseNextExpression()
}
p.expect(token.CloseParen)
}
p.expectStmtEnd()
return stmt
case token.Try:
stmt := &ast.TryStmt{}
stmt.TryBlock = p.parseBlock()
for p.expect(token.Catch); p.current.Typ == token.Catch; p.next() {
caught := &ast.CatchStmt{}
p.expect(token.OpenParen)
p.expect(token.Identifier)
caught.CatchType = p.current.Val
p.expect(token.VariableOperator)
p.expect(token.Identifier)
caught.CatchVar = ast.NewVariable(p.current.Val)
p.expect(token.CloseParen)
caught.CatchBlock = p.parseBlock()
stmt.CatchStmts = append(stmt.CatchStmts, caught)
}
p.backup()
return stmt
case token.IgnoreErrorOperator:
// Ignore this operator
p.next()
return p.parseStmt()
case token.StatementEnd:
// this is an empty statement
return &ast.EmptyStatement{}
default:
expr := p.parseExpression()
if expr != nil {
p.expectStmtEnd()
return ast.ExprStmt{expr}
}
p.errorf("Found %s, statement or expression", p.current)
return nil
}
}
func (p *Parser) parseClassFields(c ast.Class) ast.Class {
// Starting on BlockBegin
c.Methods = make([]ast.Method, 0)
c.Properties = make([]ast.Property, 0)
for p.peek().typ != token.BlockEnd {
vis, _, _, abstract := p.parseClassMemberSettings()
p.next()
switch p.current.typ {
case token.Function:
if abstract {
f := p.parseFunctionDefinition()
m := ast.Method{
Visibility: vis,
FunctionStmt: &ast.FunctionStmt{FunctionDefinition: f},
}
c.Methods = append(c.Methods, m)
p.expect(token.StatementEnd)
} else {
c.Methods = append(c.Methods, ast.Method{
Visibility: vis,
FunctionStmt: p.parseFunctionStmt(),
})
}
case token.Var:
p.expect(token.VariableOperator)
fallthrough
case token.VariableOperator:
for {
p.expect(token.Identifier)
prop := ast.Property{
Visibility: vis,
Name: "$" + p.current.val,
}
if p.peek().typ == token.AssignmentOperator {
p.expect(token.AssignmentOperator)
prop.Initialization = p.parseNextExpression()
}
c.Properties = append(c.Properties, prop)
if p.accept(token.StatementEnd) {
break
}
p.expect(token.Comma)
p.expect(token.VariableOperator)
}
case token.Const:
constant := ast.Constant{}
p.expect(token.Identifier)
constant.Variable = ast.NewVariable(p.current.val)
if p.peek().typ == token.AssignmentOperator {
p.expect(token.AssignmentOperator)
constant.Value = p.parseNextExpression()
}
c.Constants = append(c.Constants, constant)
p.expect(token.StatementEnd)
default:
p.errorf("unexpected class member %v", p.current)
return c
}
}
p.expect(token.BlockEnd)
return c
}