mirror of
https://github.com/MontFerret/ferret.git
synced 2024-12-14 11:23:02 +02:00
1057 lines
24 KiB
Go
1057 lines
24 KiB
Go
package compiler
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/MontFerret/ferret/pkg/parser/fql"
|
|
"github.com/MontFerret/ferret/pkg/runtime"
|
|
"github.com/MontFerret/ferret/pkg/runtime/collections"
|
|
"github.com/MontFerret/ferret/pkg/runtime/core"
|
|
"github.com/MontFerret/ferret/pkg/runtime/expressions"
|
|
"github.com/MontFerret/ferret/pkg/runtime/expressions/clauses"
|
|
"github.com/MontFerret/ferret/pkg/runtime/expressions/literals"
|
|
"github.com/MontFerret/ferret/pkg/runtime/expressions/operators"
|
|
"github.com/antlr/antlr4/runtime/Go/antlr"
|
|
"github.com/pkg/errors"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
type visitor struct {
|
|
*fql.BaseFqlParserVisitor
|
|
src string
|
|
funcs map[string]core.Function
|
|
}
|
|
|
|
func newVisitor(src string, funcs map[string]core.Function) *visitor {
|
|
return &visitor{
|
|
&fql.BaseFqlParserVisitor{},
|
|
src,
|
|
funcs,
|
|
}
|
|
}
|
|
|
|
func (v *visitor) VisitProgram(ctx *fql.ProgramContext) interface{} {
|
|
return newResultFrom(func() (interface{}, error) {
|
|
rootScope := newRootScope()
|
|
block, err := v.doVisitBody(ctx.Body().(*fql.BodyContext), rootScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return runtime.NewProgram(v.src, block)
|
|
})
|
|
}
|
|
|
|
func (v *visitor) doVisitBody(ctx *fql.BodyContext, scope *scope) (core.Expression, error) {
|
|
statements := ctx.AllBodyStatement()
|
|
body := expressions.NewBlockExpression(len(statements) + 1)
|
|
|
|
for _, stmt := range statements {
|
|
e, err := v.doVisitBodyStatement(stmt.(*fql.BodyStatementContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
body.Add(e)
|
|
}
|
|
|
|
exp := ctx.BodyExpression()
|
|
|
|
if exp != nil {
|
|
e, err := v.doVisitBodyExpression(exp.(*fql.BodyExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if e != nil {
|
|
body.Add(e)
|
|
}
|
|
}
|
|
|
|
return body, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitBodyStatement(ctx *fql.BodyStatementContext, scope *scope) (core.Expression, error) {
|
|
variable := ctx.VariableDeclaration()
|
|
|
|
if variable != nil {
|
|
return v.doVisitVariableDeclaration(variable.(*fql.VariableDeclarationContext), scope)
|
|
}
|
|
|
|
funcCall := ctx.FunctionCallExpression()
|
|
|
|
if funcCall != nil {
|
|
return v.doVisitFunctionCallExpression(funcCall.(*fql.FunctionCallExpressionContext), scope)
|
|
}
|
|
|
|
return nil, errors.Wrap(ErrInvalidToken, ctx.GetText())
|
|
}
|
|
|
|
func (v *visitor) doVisitBodyExpression(ctx *fql.BodyExpressionContext, scope *scope) (core.Expression, error) {
|
|
forIn := ctx.ForExpression()
|
|
|
|
if forIn != nil {
|
|
return v.doVisitForExpression(forIn.(*fql.ForExpressionContext), scope)
|
|
}
|
|
|
|
ret := ctx.ReturnExpression()
|
|
|
|
if ret != nil {
|
|
return v.doVisitReturnExpression(ret.(*fql.ReturnExpressionContext), scope)
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitReturnExpression(ctx *fql.ReturnExpressionContext, scope *scope) (core.Expression, error) {
|
|
var exp core.Expression
|
|
expCtx := ctx.Expression()
|
|
|
|
if expCtx != nil {
|
|
out, err := v.doVisitExpression(expCtx.(*fql.ExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
exp = out
|
|
|
|
return expressions.NewReturnExpression(v.getSourceMap(ctx), exp)
|
|
}
|
|
|
|
forIn := ctx.ForExpression()
|
|
|
|
if forIn != nil {
|
|
out, err := v.doVisitForExpression(ctx.ForExpression().(*fql.ForExpressionContext), scope.Fork())
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
exp = out
|
|
|
|
return expressions.NewReturnExpression(v.getSourceMap(ctx), exp)
|
|
}
|
|
|
|
forInTernary := ctx.ForTernaryExpression()
|
|
|
|
if forInTernary != nil {
|
|
out, err := v.doVisitForTernaryExpression(forInTernary.(*fql.ForTernaryExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return expressions.NewReturnExpression(v.getSourceMap(ctx), out)
|
|
}
|
|
|
|
return nil, ErrNotImplemented
|
|
}
|
|
|
|
func (v *visitor) doVisitForExpression(ctx *fql.ForExpressionContext, scope *scope) (core.Expression, error) {
|
|
var valVarName string
|
|
var keyVarName string
|
|
|
|
valVar := ctx.ForExpressionValueVariable()
|
|
valVarName = valVar.GetText()
|
|
forInScope := scope.Fork()
|
|
forInScope.SetVariable(valVarName)
|
|
|
|
keyVar := ctx.ForExpressionKeyVariable()
|
|
|
|
if keyVar != nil {
|
|
keyVarName = keyVar.GetText()
|
|
forInScope.SetVariable(keyVarName)
|
|
}
|
|
|
|
src, err := v.doVisitForExpressionSource(ctx.ForExpressionSource().(*fql.ForExpressionSourceContext), forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
body := ctx.AllForExpressionBody()
|
|
predicate := expressions.NewBlockExpression(len(body) + 1)
|
|
|
|
for _, el := range body {
|
|
el, err := v.doVisitForExpressionBody(el.(*fql.ForExpressionBodyContext), forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = predicate.Add(el)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
var spread bool
|
|
var distinct bool
|
|
forRetCtx := ctx.ForExpressionReturn().(*fql.ForExpressionReturnContext)
|
|
returnCtx := forRetCtx.ReturnExpression()
|
|
|
|
if returnCtx != nil {
|
|
returnCtx := returnCtx.(*fql.ReturnExpressionContext)
|
|
returnExp, err := v.doVisitReturnExpression(returnCtx, forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
distinct = returnCtx.Distinct() != nil
|
|
|
|
predicate.Add(returnExp)
|
|
} else {
|
|
forInCtx := forRetCtx.ForExpression().(*fql.ForExpressionContext)
|
|
forInExp, err := v.doVisitForExpression(forInCtx, forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
spread = true
|
|
|
|
predicate.Add(forInExp)
|
|
}
|
|
|
|
forExp, err := expressions.NewForExpression(
|
|
v.getSourceMap(ctx),
|
|
valVarName,
|
|
keyVarName,
|
|
src,
|
|
predicate,
|
|
distinct,
|
|
spread,
|
|
)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, clause := range ctx.AllForExpressionClause() {
|
|
clause := clause.(*fql.ForExpressionClauseContext)
|
|
|
|
limitCtx := clause.LimitClause()
|
|
|
|
if limitCtx != nil {
|
|
limit, offset, err := v.createLimit(limitCtx.(*fql.LimitClauseContext))
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
forExp.AddLimit(v.getSourceMap(limitCtx), limit, offset)
|
|
|
|
continue
|
|
}
|
|
|
|
filterCtx := clause.FilterClause()
|
|
|
|
if filterCtx != nil {
|
|
filterExp, err := v.createFilter(filterCtx.(*fql.FilterClauseContext), forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
forExp.AddFilter(v.getSourceMap(filterCtx), filterExp)
|
|
|
|
continue
|
|
}
|
|
|
|
sortCtx := clause.SortClause()
|
|
|
|
if sortCtx != nil {
|
|
sortCtx := sortCtx.(*fql.SortClauseContext)
|
|
sortExps, err := v.createSort(sortCtx, forInScope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
forExp.AddSort(v.getSourceMap(sortCtx), sortExps...)
|
|
}
|
|
}
|
|
|
|
return forExp, nil
|
|
}
|
|
|
|
func (v *visitor) createLimit(ctx *fql.LimitClauseContext) (int, int, error) {
|
|
var limit int
|
|
var offset int
|
|
|
|
intLiterals := ctx.AllIntegerLiteral()
|
|
|
|
limitLiteral := intLiterals[0]
|
|
limit, err := strconv.Atoi(limitLiteral.GetText())
|
|
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
|
|
if len(intLiterals) > 1 {
|
|
offsetLiteral := intLiterals[1]
|
|
|
|
offset, err = strconv.Atoi(offsetLiteral.GetText())
|
|
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
}
|
|
|
|
return limit, offset, nil
|
|
}
|
|
|
|
func (v *visitor) createFilter(ctx *fql.FilterClauseContext, scope *scope) (core.Expression, error) {
|
|
exp := ctx.Expression().(*fql.ExpressionContext)
|
|
|
|
exps, err := v.doVisitAllExpressions(exp.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
left := exps[0]
|
|
right := exps[1]
|
|
|
|
equalityOp := exp.EqualityOperator()
|
|
|
|
if equalityOp != nil {
|
|
return operators.NewEqualityOperator(v.getSourceMap(ctx), left, right, equalityOp.GetText())
|
|
}
|
|
|
|
logicalOp := exp.LogicalOperator()
|
|
|
|
if logicalOp != nil {
|
|
return operators.NewLogicalOperator(v.getSourceMap(ctx), left, right, logicalOp.GetText())
|
|
}
|
|
|
|
return nil, core.Error(ErrInvalidToken, ctx.GetText())
|
|
}
|
|
|
|
func (v *visitor) createSort(ctx *fql.SortClauseContext, scope *scope) ([]*clauses.SorterExpression, error) {
|
|
sortExpCtxs := ctx.AllSortClauseExpression()
|
|
|
|
res := make([]*clauses.SorterExpression, len(sortExpCtxs))
|
|
|
|
for idx, sortExpCtx := range sortExpCtxs {
|
|
sortExpCtx := sortExpCtx.(*fql.SortClauseExpressionContext)
|
|
exp, err := v.doVisitExpression(sortExpCtx.Expression().(*fql.ExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
direction := collections.SortDirectionAsc
|
|
dir := sortExpCtx.SortDirection()
|
|
|
|
if dir != nil {
|
|
direction = collections.SortDirectionFromString(dir.GetText())
|
|
}
|
|
|
|
sorterExp, err := clauses.NewSorterExpression(
|
|
exp,
|
|
direction,
|
|
)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
res[idx] = sorterExp
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitForExpressionSource(ctx *fql.ForExpressionSourceContext, scope *scope) (collections.IterableExpression, error) {
|
|
arr := ctx.ArrayLiteral()
|
|
|
|
if arr != nil {
|
|
return v.doVisitArrayLiteral(arr.(*fql.ArrayLiteralContext), scope)
|
|
}
|
|
|
|
obj := ctx.ObjectLiteral()
|
|
|
|
if obj != nil {
|
|
return v.doVisitObjectLiteral(obj.(*fql.ObjectLiteralContext), scope)
|
|
}
|
|
|
|
variable := ctx.Variable()
|
|
|
|
if variable != nil {
|
|
return v.doVisitVariable(variable.(*fql.VariableContext), scope)
|
|
}
|
|
|
|
funcCall := ctx.FunctionCallExpression()
|
|
|
|
if funcCall != nil {
|
|
return v.doVisitFunctionCallExpression(funcCall.(*fql.FunctionCallExpressionContext), scope)
|
|
}
|
|
|
|
memberExp := ctx.MemberExpression()
|
|
|
|
if memberExp != nil {
|
|
return v.doVisitMemberExpression(memberExp.(*fql.MemberExpressionContext), scope)
|
|
}
|
|
|
|
rangeOp := ctx.RangeOperator()
|
|
|
|
if rangeOp != nil {
|
|
return v.doVisitRangeOperator(rangeOp.(*fql.RangeOperatorContext), scope)
|
|
}
|
|
|
|
param := ctx.Param()
|
|
|
|
if param != nil {
|
|
return v.doVisitParamContext(param.(*fql.ParamContext), scope)
|
|
}
|
|
|
|
return nil, core.Error(ErrInvalidDataSource, ctx.GetText())
|
|
}
|
|
|
|
func (v *visitor) doVisitForExpressionBody(ctx *fql.ForExpressionBodyContext, scope *scope) (core.Expression, error) {
|
|
varDecCtx := ctx.VariableDeclaration()
|
|
|
|
if varDecCtx != nil {
|
|
return v.doVisitVariableDeclaration(varDecCtx.(*fql.VariableDeclarationContext), scope)
|
|
}
|
|
|
|
funcCallCtx := ctx.FunctionCallExpression()
|
|
|
|
if funcCallCtx != nil {
|
|
return v.doVisitFunctionCallExpression(funcCallCtx.(*fql.FunctionCallExpressionContext), scope)
|
|
}
|
|
|
|
return nil, v.unexpectedToken(ctx)
|
|
}
|
|
|
|
func (v *visitor) doVisitMemberExpression(ctx *fql.MemberExpressionContext, scope *scope) (collections.IterableExpression, error) {
|
|
varName := ctx.Identifier().GetText()
|
|
|
|
_, err := scope.GetVariable(varName)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
children := ctx.GetChildren()
|
|
path := make([]core.Expression, 0, len(children))
|
|
|
|
for _, child := range children {
|
|
_, ok := child.(antlr.TerminalNode)
|
|
|
|
if ok {
|
|
continue
|
|
}
|
|
|
|
var exp core.Expression
|
|
var err error
|
|
var parsed bool
|
|
|
|
prop, ok := child.(*fql.PropertyNameContext)
|
|
|
|
if ok {
|
|
exp, err = v.doVisitPropertyNameContext(prop, scope)
|
|
parsed = true
|
|
} else {
|
|
computedProp, ok := child.(*fql.ComputedPropertyNameContext)
|
|
|
|
if ok {
|
|
exp, err = v.doVisitComputedPropertyNameContext(computedProp, scope)
|
|
parsed = true
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if !parsed {
|
|
// TODO: add more contextual information
|
|
return nil, ErrInvalidToken
|
|
}
|
|
|
|
path = append(path, exp)
|
|
}
|
|
|
|
member, err := expressions.NewMemberExpression(
|
|
v.getSourceMap(ctx),
|
|
varName,
|
|
path,
|
|
)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return member, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitObjectLiteral(ctx *fql.ObjectLiteralContext, scope *scope) (collections.IterableExpression, error) {
|
|
assignments := ctx.AllPropertyAssignment()
|
|
props := make([]*literals.ObjectPropertyAssignment, 0, len(assignments))
|
|
|
|
for _, assignment := range assignments {
|
|
var name core.Expression
|
|
var value core.Expression
|
|
var err error
|
|
|
|
assignment := assignment.(*fql.PropertyAssignmentContext)
|
|
|
|
prop := assignment.PropertyName()
|
|
computedProp := assignment.ComputedPropertyName()
|
|
shortHand := assignment.ShorthandPropertyName()
|
|
|
|
if prop != nil {
|
|
name, err = v.doVisitPropertyNameContext(prop.(*fql.PropertyNameContext), scope)
|
|
} else if computedProp != nil {
|
|
name, err = v.doVisitComputedPropertyNameContext(computedProp.(*fql.ComputedPropertyNameContext), scope)
|
|
} else {
|
|
name, err = v.doVisitShorthandPropertyNameContext(shortHand.(*fql.ShorthandPropertyNameContext), scope)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if shortHand == nil {
|
|
value, err = v.visit(assignment.Expression(), scope)
|
|
} else {
|
|
value, err = v.doVisitVariable(shortHand.(*fql.ShorthandPropertyNameContext).Variable().(*fql.VariableContext), scope)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
props = append(props, literals.NewObjectPropertyAssignment(name, value))
|
|
}
|
|
|
|
return literals.NewObjectLiteralWith(props...), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitPropertyNameContext(ctx *fql.PropertyNameContext, scope *scope) (core.Expression, error) {
|
|
return literals.NewStringLiteral(ctx.Identifier().GetText()), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitComputedPropertyNameContext(ctx *fql.ComputedPropertyNameContext, scope *scope) (core.Expression, error) {
|
|
return v.doVisitExpression(ctx.Expression().(*fql.ExpressionContext), scope)
|
|
}
|
|
|
|
func (v *visitor) doVisitShorthandPropertyNameContext(ctx *fql.ShorthandPropertyNameContext, scope *scope) (core.Expression, error) {
|
|
name := ctx.Variable().GetText()
|
|
|
|
_, err := scope.GetVariable(name)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return literals.NewStringLiteral(ctx.Variable().GetText()), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitArrayLiteral(ctx *fql.ArrayLiteralContext, scope *scope) (collections.IterableExpression, error) {
|
|
listCtx := ctx.ArrayElementList()
|
|
|
|
if listCtx == nil {
|
|
return literals.NewArrayLiteral(0), nil
|
|
}
|
|
|
|
list := listCtx.(*fql.ArrayElementListContext)
|
|
exp := list.AllExpression()
|
|
elements := make([]core.Expression, 0, len(exp))
|
|
|
|
for _, e := range exp {
|
|
element, err := v.visit(e, scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
elements = append(elements, element)
|
|
}
|
|
|
|
return literals.NewArrayLiteralWith(elements...), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitFloatLiteral(ctx *fql.FloatLiteralContext) (core.Expression, error) {
|
|
val, err := strconv.ParseFloat(ctx.GetText(), 64)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return literals.NewFloatLiteral(val), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitIntegerLiteral(ctx *fql.IntegerLiteralContext) (core.Expression, error) {
|
|
val, err := strconv.Atoi(ctx.GetText())
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return literals.NewIntLiteral(val), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitStringLiteral(ctx *fql.StringLiteralContext) (core.Expression, error) {
|
|
text := ctx.StringLiteral().GetText()
|
|
|
|
// remove extra quotes
|
|
return literals.NewStringLiteral(text[1 : len(text)-1]), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitBooleanLiteral(ctx *fql.BooleanLiteralContext) (core.Expression, error) {
|
|
return literals.NewBooleanLiteral(strings.ToUpper(ctx.GetText()) == "TRUE"), nil
|
|
}
|
|
|
|
func (v *visitor) doVisitNoneLiteral(ctx *fql.NoneLiteralContext) (core.Expression, error) {
|
|
return literals.None, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitVariable(ctx *fql.VariableContext, scope *scope) (collections.IterableExpression, error) {
|
|
name := ctx.Identifier().GetText()
|
|
|
|
// check whether the variable is defined
|
|
_, err := scope.GetVariable(name)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return expressions.NewVariableExpression(v.getSourceMap(ctx), name)
|
|
}
|
|
|
|
func (v *visitor) doVisitVariableDeclaration(ctx *fql.VariableDeclarationContext, scope *scope) (core.Expression, error) {
|
|
var init core.Expression
|
|
var err error
|
|
|
|
exp := ctx.Expression()
|
|
|
|
if exp != nil {
|
|
init, err = v.doVisitExpression(ctx.Expression().(*fql.ExpressionContext), scope)
|
|
}
|
|
|
|
if init == nil && err == nil {
|
|
forIn := ctx.ForExpression()
|
|
|
|
if forIn != nil {
|
|
init, err = v.doVisitForExpression(forIn.(*fql.ForExpressionContext), scope)
|
|
}
|
|
}
|
|
|
|
if init == nil && err == nil {
|
|
forTer := ctx.ForTernaryExpression()
|
|
|
|
if forTer != nil {
|
|
init, err = v.doVisitForTernaryExpression(forTer.(*fql.ForTernaryExpressionContext), scope)
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
name := ctx.Identifier().GetText()
|
|
|
|
scope.SetVariable(name)
|
|
|
|
return expressions.NewVariableDeclarationExpression(
|
|
v.getSourceMap(ctx),
|
|
name,
|
|
init,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) doVisitRangeOperator(ctx *fql.RangeOperatorContext, scope *scope) (collections.IterableExpression, error) {
|
|
exp, err := v.doVisitChildren(ctx, scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(exp) < 2 {
|
|
return nil, errors.Wrap(ErrInvalidToken, ctx.GetText())
|
|
}
|
|
|
|
left := exp[0]
|
|
right := exp[1]
|
|
|
|
return operators.NewRangeOperator(
|
|
v.getSourceMap(ctx),
|
|
left,
|
|
right,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) doVisitFunctionCallExpression(context *fql.FunctionCallExpressionContext, scope *scope) (collections.IterableExpression, error) {
|
|
args := make([]core.Expression, 0, 5)
|
|
argsCtx := context.Arguments()
|
|
|
|
if argsCtx != nil {
|
|
argsCtx := argsCtx.(*fql.ArgumentsContext)
|
|
|
|
for _, arg := range argsCtx.AllExpression() {
|
|
exp, err := v.doVisitExpression(arg.(*fql.ExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
args = append(args, exp)
|
|
}
|
|
}
|
|
|
|
funcName := context.Identifier().GetText()
|
|
|
|
fun, exists := v.funcs[funcName]
|
|
|
|
if !exists {
|
|
return nil, core.Error(core.ErrNotFound, fmt.Sprintf("function: '%s'", funcName))
|
|
}
|
|
|
|
return expressions.NewFunctionCallExpression(
|
|
v.getSourceMap(context),
|
|
fun,
|
|
args...,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) doVisitParamContext(context *fql.ParamContext, scope *scope) (collections.IterableExpression, error) {
|
|
name := context.Identifier().GetText()
|
|
|
|
return expressions.NewParameterExpression(
|
|
v.getSourceMap(context),
|
|
name,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) doVisitAllExpressions(contexts []fql.IExpressionContext, scope *scope) ([]core.Expression, error) {
|
|
ret := make([]core.Expression, 0, len(contexts))
|
|
|
|
for _, ctx := range contexts {
|
|
exp, err := v.doVisitExpression(ctx.(*fql.ExpressionContext), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ret = append(ret, exp)
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func (v *visitor) doVisitExpression(ctx *fql.ExpressionContext, scope *scope) (core.Expression, error) {
|
|
variable := ctx.Variable()
|
|
|
|
if variable != nil {
|
|
return v.doVisitVariable(variable.(*fql.VariableContext), scope)
|
|
}
|
|
|
|
str := ctx.StringLiteral()
|
|
|
|
if str != nil {
|
|
return v.doVisitStringLiteral(str.(*fql.StringLiteralContext))
|
|
}
|
|
|
|
integ := ctx.IntegerLiteral()
|
|
|
|
if integ != nil {
|
|
return v.doVisitIntegerLiteral(integ.(*fql.IntegerLiteralContext))
|
|
}
|
|
|
|
float := ctx.FloatLiteral()
|
|
|
|
if float != nil {
|
|
return v.doVisitFloatLiteral(float.(*fql.FloatLiteralContext))
|
|
}
|
|
|
|
boolean := ctx.BooleanLiteral()
|
|
|
|
if boolean != nil {
|
|
return v.doVisitBooleanLiteral(boolean.(*fql.BooleanLiteralContext))
|
|
}
|
|
|
|
arr := ctx.ArrayLiteral()
|
|
|
|
if arr != nil {
|
|
return v.doVisitArrayLiteral(arr.(*fql.ArrayLiteralContext), scope)
|
|
}
|
|
|
|
obj := ctx.ObjectLiteral()
|
|
|
|
if obj != nil {
|
|
return v.doVisitObjectLiteral(obj.(*fql.ObjectLiteralContext), scope)
|
|
}
|
|
|
|
funCall := ctx.FunctionCallExpression()
|
|
|
|
if funCall != nil {
|
|
return v.doVisitFunctionCallExpression(funCall.(*fql.FunctionCallExpressionContext), scope)
|
|
}
|
|
|
|
member := ctx.MemberExpression()
|
|
|
|
if member != nil {
|
|
return v.doVisitMemberExpression(member.(*fql.MemberExpressionContext), scope)
|
|
}
|
|
|
|
none := ctx.NoneLiteral()
|
|
|
|
if none != nil {
|
|
return v.doVisitNoneLiteral(none.(*fql.NoneLiteralContext))
|
|
}
|
|
|
|
equalityOp := ctx.EqualityOperator()
|
|
|
|
if equalityOp != nil {
|
|
equalityOp := equalityOp.(*fql.EqualityOperatorContext)
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
left := exps[0]
|
|
right := exps[1]
|
|
|
|
return operators.NewEqualityOperator(v.getSourceMap(equalityOp), left, right, equalityOp.GetText())
|
|
}
|
|
|
|
logicalOp := ctx.LogicalOperator()
|
|
|
|
if logicalOp != nil {
|
|
logicalOp := logicalOp.(*fql.LogicalOperatorContext)
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
left := exps[0]
|
|
right := exps[1]
|
|
|
|
return operators.NewLogicalOperator(v.getSourceMap(logicalOp), left, right, logicalOp.GetText())
|
|
}
|
|
|
|
mathOp := ctx.MathOperator()
|
|
|
|
if mathOp != nil {
|
|
mathOp := mathOp.(*fql.MathOperatorContext)
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
left := exps[0]
|
|
right := exps[1]
|
|
|
|
return operators.NewMathOperator(v.getSourceMap(mathOp), left, right, mathOp.GetText())
|
|
}
|
|
|
|
questionCtx := ctx.QuestionMark()
|
|
|
|
if questionCtx != nil {
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return v.createTernaryOperator(
|
|
v.getSourceMap(ctx),
|
|
exps,
|
|
scope,
|
|
)
|
|
}
|
|
|
|
inOp := ctx.In()
|
|
|
|
if inOp != nil {
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
left := exps[0]
|
|
right := exps[1]
|
|
|
|
return operators.NewInOperator(
|
|
v.getSourceMap(ctx),
|
|
left,
|
|
right,
|
|
ctx.Not() != nil,
|
|
)
|
|
}
|
|
|
|
notOp := ctx.Not()
|
|
|
|
if notOp != nil {
|
|
exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
exp := exps[0]
|
|
|
|
return operators.NewLogicalOperator(
|
|
v.getSourceMap(ctx),
|
|
nil,
|
|
exp,
|
|
"NOT",
|
|
)
|
|
}
|
|
|
|
rangeOp := ctx.RangeOperator()
|
|
|
|
if rangeOp != nil {
|
|
return v.doVisitRangeOperator(rangeOp.(*fql.RangeOperatorContext), scope)
|
|
}
|
|
|
|
param := ctx.Param()
|
|
|
|
if param != nil {
|
|
return v.doVisitParamContext(param.(*fql.ParamContext), scope)
|
|
}
|
|
|
|
// TODO: Complete it
|
|
return nil, ErrNotImplemented
|
|
}
|
|
|
|
func (v *visitor) doVisitChildren(node antlr.RuleNode, scope *scope) ([]core.Expression, error) {
|
|
children := node.GetChildren()
|
|
|
|
if children == nil {
|
|
return make([]core.Expression, 0, 0), nil
|
|
}
|
|
|
|
result := make([]core.Expression, 0, len(children))
|
|
|
|
for _, child := range children {
|
|
_, ok := child.(antlr.TerminalNode)
|
|
|
|
if ok {
|
|
continue
|
|
}
|
|
|
|
out, err := v.visit(child, scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
result = append(result, out)
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func (v *visitor) visit(node antlr.Tree, scope *scope) (core.Expression, error) {
|
|
var out core.Expression
|
|
var err error
|
|
|
|
switch node.(type) {
|
|
case *fql.BodyContext:
|
|
out, err = v.doVisitBody(node.(*fql.BodyContext), scope)
|
|
case *fql.ExpressionContext:
|
|
out, err = v.doVisitExpression(node.(*fql.ExpressionContext), scope)
|
|
case *fql.ForExpressionContext:
|
|
out, err = v.doVisitForExpression(node.(*fql.ForExpressionContext), scope)
|
|
case *fql.ReturnExpressionContext:
|
|
out, err = v.doVisitReturnExpression(node.(*fql.ReturnExpressionContext), scope)
|
|
case *fql.ArrayLiteralContext:
|
|
out, err = v.doVisitArrayLiteral(node.(*fql.ArrayLiteralContext), scope)
|
|
case *fql.ObjectLiteralContext:
|
|
out, err = v.doVisitObjectLiteral(node.(*fql.ObjectLiteralContext), scope)
|
|
case *fql.StringLiteralContext:
|
|
out, err = v.doVisitStringLiteral(node.(*fql.StringLiteralContext))
|
|
case *fql.IntegerLiteralContext:
|
|
out, err = v.doVisitIntegerLiteral(node.(*fql.IntegerLiteralContext))
|
|
case *fql.FloatLiteralContext:
|
|
out, err = v.doVisitFloatLiteral(node.(*fql.FloatLiteralContext))
|
|
case *fql.BooleanLiteralContext:
|
|
out, err = v.doVisitBooleanLiteral(node.(*fql.BooleanLiteralContext))
|
|
case *fql.NoneLiteralContext:
|
|
out, err = v.doVisitNoneLiteral(node.(*fql.NoneLiteralContext))
|
|
case *fql.VariableContext:
|
|
out, err = v.doVisitVariable(node.(*fql.VariableContext), scope)
|
|
case *fql.VariableDeclarationContext:
|
|
out, err = v.doVisitVariableDeclaration(node.(*fql.VariableDeclarationContext), scope)
|
|
case *fql.FunctionCallExpressionContext:
|
|
out, err = v.doVisitFunctionCallExpression(node.(*fql.FunctionCallExpressionContext), scope)
|
|
case *fql.ParamContext:
|
|
out, err = v.doVisitParamContext(node.(*fql.ParamContext), scope)
|
|
default:
|
|
err = v.unexpectedToken(node)
|
|
}
|
|
|
|
return out, err
|
|
}
|
|
|
|
func (v *visitor) doVisitForTernaryExpression(ctx *fql.ForTernaryExpressionContext, scope *scope) (*expressions.ConditionExpression, error) {
|
|
exps, err := v.doVisitChildren(ctx, scope)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return v.createTernaryOperator(
|
|
v.getSourceMap(ctx),
|
|
exps,
|
|
scope,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) createTernaryOperator(src core.SourceMap, exps []core.Expression, scope *scope) (*expressions.ConditionExpression, error) {
|
|
var test core.Expression
|
|
var consequent core.Expression
|
|
var alternate core.Expression
|
|
|
|
if len(exps) == 3 {
|
|
test = exps[0]
|
|
consequent = exps[1]
|
|
alternate = exps[2]
|
|
} else {
|
|
test = exps[0]
|
|
alternate = exps[1]
|
|
}
|
|
|
|
return expressions.NewConditionExpression(
|
|
src,
|
|
test,
|
|
consequent,
|
|
alternate,
|
|
)
|
|
}
|
|
|
|
func (v *visitor) unexpectedToken(node antlr.Tree) error {
|
|
name := "undefined"
|
|
ctx, ok := node.(antlr.RuleContext)
|
|
|
|
if ok {
|
|
name = ctx.GetText()
|
|
}
|
|
|
|
return errors.Errorf("unexpected token: %s", name)
|
|
}
|
|
|
|
func (v *visitor) getSourceMap(rule antlr.ParserRuleContext) core.SourceMap {
|
|
start := rule.GetStart()
|
|
|
|
return core.NewSourceMap(
|
|
rule.GetText(),
|
|
start.GetLine(),
|
|
start.GetColumn(),
|
|
)
|
|
}
|