From c313f7870bd547534c7c7bb0ad01003ab9983b34 Mon Sep 17 00:00:00 2001
From: Ryo Nihei <nihei.dev@gmail.com>
Date: Tue, 16 Feb 2021 00:07:40 +0900
Subject: Add types of lexical specifications

APIs of compiler and driver packages use these types. Because CompiledLexSpec struct a lexer takes has kind names of lexical specification entries, the lexer sets them to tokens.
---
 spec/spec.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 spec/spec.go

(limited to 'spec/spec.go')

diff --git a/spec/spec.go b/spec/spec.go
new file mode 100644
index 0000000..d827b68
--- /dev/null
+++ b/spec/spec.go
@@ -0,0 +1,28 @@
+package spec
+
+type LexEntry struct {
+	Kind    string `json:"kind"`
+	Pattern string `json:"pattern"`
+}
+
+func NewLexEntry(kind string, pattern string) *LexEntry {
+	return &LexEntry{
+		Kind:    kind,
+		Pattern: pattern,
+	}
+}
+
+type LexSpec struct {
+	Entries []*LexEntry `json:"entries"`
+}
+
+type TransitionTable struct {
+	InitialState    int         `json:"initial_state"`
+	AcceptingStates map[int]int `json:"accepting_states"`
+	Transition      [][]int     `json:"transition"`
+}
+
+type CompiledLexSpec struct {
+	Kinds []string         `json:"kinds"`
+	DFA   *TransitionTable `json:"dfa"`
+}
-- 
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