102 lines
1.8 KiB
Go
102 lines
1.8 KiB
Go
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// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sql
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func (p *Parser) parseThings() ([]Expr, error) {
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var ts []Expr
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for {
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t, err := p.parseThing()
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if err != nil {
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return nil, err
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}
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ts = append(ts, t)
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// If the next token is not a comma then break the loop.
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if tok, _ := p.scanIgnoreWhitespace(); tok != COMMA {
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p.unscan()
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break
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}
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}
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return ts, nil
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}
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func (p *Parser) parseThing() (Expr, error) {
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var (
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err error
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tok Token
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lit string
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)
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_, _, exi := p.mightBe(EAT)
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if exi == false {
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t := &Table{}
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// Parse table name
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tok, lit = p.scan()
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if !is(tok, IDENT, NUMBER) {
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p.unscan()
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return nil, &ParseError{Found: lit, Expected: []string{"table name"}}
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}
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t.Name = lit
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return t, nil
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}
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if exi == true {
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t := &Thing{}
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// Parse table name
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tok, lit = p.scan()
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if !is(tok, IDENT, NUMBER) {
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p.unscan()
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return nil, &ParseError{Found: lit, Expected: []string{"table name"}}
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}
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t.Table = lit
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// Next token should be :
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_, _, err = p.shouldBe(COLON)
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if err != nil {
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return nil, err
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}
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// Parse table id
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tok, lit = p.scan()
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if !is(tok, IDENT, NUMBER) {
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p.unscan()
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return nil, &ParseError{Found: lit, Expected: []string{"table id"}}
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}
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t.ID = lit
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return t, nil
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}
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return nil, nil
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}
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