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compiler: allow to append multiple elements

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This commit is contained in:
Roman Khimov 2020-07-09 13:51:49 +03:00
parent 76925fe3e0
commit bc1d6791b9
2 changed files with 43 additions and 12 deletions
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28
pkg/compiler/codegen.go
View file

@ -1176,25 +1176,29 @@ func (c *codegen) convertBuiltin(expr *ast.CallExpr) {
case "append":
arg := expr.Args[0]
typ := c.typeInfo.Types[arg].Type
emit.Opcode(c.prog.BinWriter, opcode.OVER)
c.emitReverse(len(expr.Args))
emit.Opcode(c.prog.BinWriter, opcode.DUP)
emit.Opcode(c.prog.BinWriter, opcode.ISNULL)
emit.Instruction(c.prog.BinWriter, opcode.JMPIFNOT, []byte{2 + 4})
emit.Instruction(c.prog.BinWriter, opcode.JMPIFNOT, []byte{2 + 3})
if isByteSlice(typ) {
emit.Opcode(c.prog.BinWriter, opcode.NIP)
emit.Opcode(c.prog.BinWriter, opcode.DROP)
emit.Opcode(c.prog.BinWriter, opcode.PUSH0)
emit.Opcode(c.prog.BinWriter, opcode.NEWBUFFER)
emit.Opcode(c.prog.BinWriter, opcode.SWAP)
// Jump target.
emit.Opcode(c.prog.BinWriter, opcode.CAT)
} else {
emit.Opcode(c.prog.BinWriter, opcode.NIP)
emit.Opcode(c.prog.BinWriter, opcode.DROP)
emit.Opcode(c.prog.BinWriter, opcode.NEWARRAY0)
emit.Opcode(c.prog.BinWriter, opcode.SWAP)
emit.Opcode(c.prog.BinWriter, opcode.NOP)
// Jump target.
emit.Opcode(c.prog.BinWriter, opcode.OVER)
emit.Opcode(c.prog.BinWriter, opcode.SWAP)
emit.Opcode(c.prog.BinWriter, opcode.APPEND)
}
// Jump target.
for range expr.Args[1:] {
if isByteSlice(typ) {
emit.Opcode(c.prog.BinWriter, opcode.SWAP)
emit.Opcode(c.prog.BinWriter, opcode.CAT)
} else {
emit.Opcode(c.prog.BinWriter, opcode.DUP)
emit.Opcode(c.prog.BinWriter, opcode.ROT)
emit.Opcode(c.prog.BinWriter, opcode.APPEND)
}
}
case "panic":
arg := expr.Args[0]

27
pkg/compiler/slice_test.go
View file

@ -151,6 +151,33 @@ var sliceTestCases = []testCase{
}`,
[]byte{1, 2},
},
{
"append multiple bytes to a slice",
`package foo
func Main() []byte {
var a []byte
a = append(a, 1, 2)
return a
}`,
[]byte{1, 2},
},
{
"append multiple ints to a slice",
`package foo
func Main() []int {
var a []int
a = append(a, 1, 2, 3)
a = append(a, 4, 5)
return a
}`,
[]stackitem.Item{
stackitem.NewBigInteger(big.NewInt(1)),
stackitem.NewBigInteger(big.NewInt(2)),
stackitem.NewBigInteger(big.NewInt(3)),
stackitem.NewBigInteger(big.NewInt(4)),
stackitem.NewBigInteger(big.NewInt(5)),
},
},
{
"declare compound slice",
`package foo