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param_style.go
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68 lines (57 loc) · 1.49 KB
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package validate
import (
"fmt"
"github.com/sqlc-dev/sqlc/internal/sql/ast"
"github.com/sqlc-dev/sqlc/internal/sql/astutils"
"github.com/sqlc-dev/sqlc/internal/sql/sqlerr"
)
type sqlcFuncVisitor struct {
err error
}
func (v *sqlcFuncVisitor) Visit(node ast.Node) astutils.Visitor {
if v.err != nil {
return nil
}
call, ok := node.(*ast.FuncCall)
if !ok {
return v
}
fn := call.Func
if fn == nil {
return v
}
// Custom validation for sqlc.arg, sqlc.narg and sqlc.slice
// TODO: Replace this once type-checking is implemented
if fn.Schema == "sqlc" {
if !(fn.Name == "arg" || fn.Name == "narg" || fn.Name == "slice" || fn.Name == "embed") {
v.err = sqlerr.FunctionNotFound("sqlc." + fn.Name)
return nil
}
if len(call.Args.Items) != 1 {
v.err = &sqlerr.Error{
Message: fmt.Sprintf("expected 1 parameter to sqlc.%s; got %d", fn.Name, len(call.Args.Items)),
Location: call.Pos(),
}
return nil
}
switch n := call.Args.Items[0].(type) {
case *ast.A_Const:
case *ast.ColumnRef:
default:
v.err = &sqlerr.Error{
Message: fmt.Sprintf("expected parameter to sqlc.%s to be string or reference; got %T", fn.Name, n),
Location: call.Pos(),
}
return nil
}
// If we have sqlc.arg or sqlc.narg, there is no need to resolve the function call.
// It won't resolve anyway, sinc it is not a real function.
return nil
}
return nil
}
func SqlcFunctions(n ast.Node) error {
visitor := sqlcFuncVisitor{}
astutils.Walk(&visitor, n)
return visitor.err
}