From 97d36965cbb30108340727a982539e67dafea92d Mon Sep 17 00:00:00 2001
From: Ryo Nihei <nihei.dev@gmail.com>
Date: Thu, 14 Apr 2022 02:11:06 +0900
Subject: Add tests for compiler

---
 spec/parser.go       | 16 ++++++++++------
 spec/parser_test.go  |  5 +++++
 spec/syntax_error.go |  1 +
 3 files changed, 16 insertions(+), 6 deletions(-)

(limited to 'spec')

diff --git a/spec/parser.go b/spec/parser.go
index 2d16614..a1d23f0 100644
--- a/spec/parser.go
+++ b/spec/parser.go
@@ -56,6 +56,7 @@ type DirectiveNode struct {
 
 type ParameterNode struct {
 	ID        string
+	Pattern   string
 	String    string
 	Expansion bool
 	Pos       Position
@@ -197,19 +198,17 @@ func (p *parser) parseMetaData() *DirectiveNode {
 	mdPos := p.lastTok.pos
 
 	if !p.consume(tokenKindID) {
-		raiseSyntaxError(p.pos.Row, synErrNoProductionName)
+		raiseSyntaxError(p.pos.Row, synErrNoMDName)
 	}
 	name := p.lastTok.text
 
 	var params []*ParameterNode
 	for {
-		if !p.consume(tokenKindID) {
+		param := p.parseParameter()
+		if param == nil {
 			break
 		}
-		params = append(params, &ParameterNode{
-			ID:  p.lastTok.text,
-			Pos: p.lastTok.pos,
-		})
+		params = append(params, param)
 	}
 
 	return &DirectiveNode{
@@ -463,6 +462,11 @@ func (p *parser) parseParameter() *ParameterNode {
 			ID:  p.lastTok.text,
 			Pos: p.lastTok.pos,
 		}
+	case p.consume(tokenKindTerminalPattern):
+		param = &ParameterNode{
+			Pattern: p.lastTok.text,
+			Pos:     p.lastTok.pos,
+		}
 	case p.consume(tokenKindStringLiteral):
 		param = &ParameterNode{
 			String: p.lastTok.text,
diff --git a/spec/parser_test.go b/spec/parser_test.go
index 0772dae..2a44acd 100644
--- a/spec/parser_test.go
+++ b/spec/parser_test.go
@@ -183,6 +183,11 @@ c: ;
 				},
 			},
 		},
+		{
+			caption: "`fragment` is a reserved word",
+			src:     `fragment: 'fragment';`,
+			synErr:  synErrNoProductionName,
+		},
 		{
 			caption: "when a source contains an unknown token, the parser raises a syntax error",
 			src:     `a: !;`,
diff --git a/spec/syntax_error.go b/spec/syntax_error.go
index c4e6594..fdf9c40 100644
--- a/spec/syntax_error.go
+++ b/spec/syntax_error.go
@@ -25,6 +25,7 @@ var (
 
 	// syntax errors
 	synErrInvalidToken       = newSyntaxError("invalid token")
+	synErrNoMDName           = newSyntaxError("a metadata name is missing")
 	synErrNoProductionName   = newSyntaxError("a production name is missing")
 	synErrNoColon            = newSyntaxError("the colon must precede alternatives")
 	synErrNoSemicolon        = newSyntaxError("the semicolon is missing at the last of an alternative")
-- 
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