From bd07ae3f4e1bcdedc3e373460671ca9713a03de5 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Thu, 2 Jun 2022 21:34:16 -0700
Subject: Changeset: 60 Add struct/class scanning to codegen

---
 source/20-codegen-compiler/CodegenLexer.hpp | 47 +++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 source/20-codegen-compiler/CodegenLexer.hpp

(limited to 'source/20-codegen-compiler/CodegenLexer.hpp')

diff --git a/source/20-codegen-compiler/CodegenLexer.hpp b/source/20-codegen-compiler/CodegenLexer.hpp
new file mode 100644
index 0000000..76adce6
--- /dev/null
+++ b/source/20-codegen-compiler/CodegenLexer.hpp
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <LookupTable.hpp>
+
+#include <stb_c_lexer.h>
+#include <span>
+#include <string>
+#include <string_view>
+#include <vector>
+
+enum {
+	CLEX_ext_single_char = CLEX_first_unused_token,
+	CLEX_ext_double_colon,
+	CLEX_ext_dot_dot_dot,
+	CLEX_ext_COUNT,
+};
+
+struct StbLexerToken {
+	std::string text;
+
+	union {
+		double lexerRealNumber;
+		long lexerIntNumber;
+	};
+
+	// Can either be CLEX_* or CLEX_ext_* values
+	int type;
+};
+
+bool StbTokenIsSingleChar(int lexerToken);
+bool StbTokenIsMultiChar(int lexerToken);
+std::string CombineTokens(std::span<const StbLexerToken> tokens);
+
+struct CodegenLexer {
+	std::vector<StbLexerToken> tokens;
+	size_t idx = 0;
+
+	void InitializeFrom(std::string_view source);
+
+	const StbLexerToken& Current() const;
+
+	const StbLexerToken* TryConsumeToken(int type);
+	const StbLexerToken* TryConsumeSingleCharToken(char c);
+
+    void SkipUntilToken(int type);
+    void SkipUntilTokenSingleChar(char c);
+};
-- 
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