func generateTypeDef(first bool, typeDef expressionParsing.TypeDefinition) string {
if ftd, ok := typeDef.(expressionParsing.FuncTypeDefinition); ok {
s := fmt.Sprintf("(%s %s) %s", ftd.ArgumentName(), ftd.ArgumentType().GenerateGo(), generateTypeDef(false, ftd.ReturnType()))
if !first {
return "func " + s
}
return s
} else {
return string(typeDef.GenerateGo())
}
}
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("LambdaStatement", func() {
var statementParser StatementParser
var factory *StatementFactory
BeforeEach(func() {
retParser := NewReturnStatementParser()
declParser := NewLetParser()
statementParser = NewLambdaStatementParser()
factory = NewStatementFactory(declParser, statementParser, retParser)
})
Context("Parse", func() {
var expectedType expressionParsing.TypeDefinition
BeforeEach(func() {
expectedType, _, _ = expressionParsing.ParseTypeDef("func a A -> b B -> int32")
})
It("Should distinguish a lambda statement", func() {
code := "func a A -> b B -> int32\n\t5+9"
f, err := statementParser.Parse(code, 0, nil, factory)
Expect(f).ToNot(BeNil())
fs := f.(*LambdaStatement)
Expect(err).To(BeNil())
Expect(fs).ToNot(BeNil())
Expect(fs.TypeDef.GenerateGo()).To(Equal(expectedType.GenerateGo()))
Expect(fs.InnerStatements).ToNot(BeNil())
Expect(fs.InnerStatements).To(HaveLen(1))
})
It("Should distinguish a single line lambda statement", func() {
Expect(returnType.GenerateGo()).To(Equal(intType.GenerateGo()))
Expect(genGo).To(Equal("((1+11)-(10/2))"))
})
It("Should generate the proper Go code with proper numeric types", func() {
code := "( 1b + 11b ) - 10b / 2b"
r, err := statementParser.Parse(code, 0, nil, factory)
Expect(err).To(BeNil())
genGo, returnType, err := r.GenerateGo(funcMap)
Expect(err).To(BeNil())
intType, _, _ := expressionParsing.ParseTypeDef("int8")
Expect(returnType.GenerateGo()).To(Equal(intType.GenerateGo()))
Expect(genGo).To(Equal("((int8(1)+int8(11))-(int8(10)/int8(2)))"))
})
})
Context("With functions", func() {
var intType expressionParsing.TypeDefinition
var funcType expressionParsing.TypeDefinition
var twoArgFunc expressionParsing.TypeDefinition
BeforeEach(func() {
intType, _, _ = expressionParsing.ParseTypeDef("int32")
funcType, _, _ = expressionParsing.ParseTypeDef("func a int32 -> int32")
twoArgFunc, _, _ = expressionParsing.ParseTypeDef("func a int32 -> b int32 -> int32")
})
It("Should generate the proper Go code with a definition", func() {
code := "( 1 + 11 ) - a / 2"
r, err := statementParser.Parse(code, 0, nil, factory)
Expect(err).To(BeNil())
fm := expressionParsing.NewFunctionMap()
name, _ := fm.AddFunction("a", intType)
genGo, returnType, err := r.GenerateGo(fm)
Expect(err).To(BeNil())