1 files changed, 112 insertions, 0 deletions
diff --git a/vendor/github.com/vektah/gqlparser/parser/parser.go b/vendor/github.com/vektah/gqlparser/parser/parser.go
new file mode 100644
index 00000000..f3648cb3
--- /dev/null
+++ b/vendor/github.com/vektah/gqlparser/parser/parser.go
@@ -0,0 +1,112 @@
+package parser
+
+import (
+	"strconv"
+
+	"github.com/vektah/gqlparser/ast"
+	"github.com/vektah/gqlparser/gqlerror"
+	"github.com/vektah/gqlparser/lexer"
+)
+
+type parser struct {
+	lexer lexer.Lexer
+	err   *gqlerror.Error
+
+	peeked    bool
+	peekToken lexer.Token
+	peekError *gqlerror.Error
+
+	prev lexer.Token
+}
+
+func (p *parser) peekPos() *ast.Position {
+	if p.err != nil {
+		return nil
+	}
+
+	peek := p.peek()
+	return &peek.Pos
+}
+
+func (p *parser) peek() lexer.Token {
+	if p.err != nil {
+		return p.prev
+	}
+
+	if !p.peeked {
+		p.peekToken, p.peekError = p.lexer.ReadToken()
+		p.peeked = true
+	}
+
+	return p.peekToken
+}
+
+func (p *parser) error(tok lexer.Token, format string, args ...interface{}) {
+	if p.err != nil {
+		return
+	}
+	p.err = gqlerror.ErrorLocf(tok.Pos.Src.Name, tok.Pos.Line, tok.Pos.Column, format, args...)
+}
+
+func (p *parser) next() lexer.Token {
+	if p.err != nil {
+		return p.prev
+	}
+	if p.peeked {
+		p.peeked = false
+		p.prev, p.err = p.peekToken, p.peekError
+	} else {
+		p.prev, p.err = p.lexer.ReadToken()
+	}
+	return p.prev
+}
+
+func (p *parser) expectKeyword(value string) lexer.Token {
+	tok := p.peek()
+	if tok.Kind == lexer.Name && tok.Value == value {
+		return p.next()
+	}
+
+	p.error(tok, "Expected %s, found %s", strconv.Quote(value), tok.String())
+	return tok
+}
+
+func (p *parser) expect(kind lexer.Type) lexer.Token {
+	tok := p.peek()
+	if tok.Kind == kind {
+		return p.next()
+	}
+
+	p.error(tok, "Expected %s, found %s", kind, tok.Kind.String())
+	return tok
+}
+
+func (p *parser) skip(kind lexer.Type) bool {
+	tok := p.peek()
+
+	if tok.Kind != kind {
+		return false
+	}
+	p.next()
+	return true
+}
+
+func (p *parser) unexpectedError() {
+	p.unexpectedToken(p.peek())
+}
+
+func (p *parser) unexpectedToken(tok lexer.Token) {
+	p.error(tok, "Unexpected %s", tok.String())
+}
+
+func (p *parser) many(start lexer.Type, end lexer.Type, cb func()) {
+	hasDef := p.skip(start)
+	if !hasDef {
+		return
+	}
+
+	for p.peek().Kind != end && p.err == nil {
+		cb()
+	}
+	p.next()
+}