From 8f4eb9fc953512365f9258ffd5d11ed8950f77a9 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Tue, 13 Jun 2023 01:23:42 -0700
Subject: added indentation support for |as rule

---
 lexer.c    | 13 +++++++------
 lexer.h    |  1 +
 operetta.c |  3 +++
 parse.c    | 21 ++++++++++++++-------
 parse.h    |  3 ++-
 testfile   |  5 +++--
 6 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/lexer.c b/lexer.c
index 5df1103..c6c4ffe 100644
--- a/lexer.c
+++ b/lexer.c
@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include <stdio.h>
 #include <string.h>
 #include "lexer.h"
 
@@ -21,6 +20,8 @@ char* tttos(tokenType_t tokenType) {
 			return "ERR";
 		case EOL:
 			return "EOL";
+		case INDENT:
+			return "INDENT";
 		case STRING:
 			return "STRING";
 		case INT:
@@ -53,7 +54,7 @@ char* tttos(tokenType_t tokenType) {
 }
 int advance_whitespace(char** linePointer) {
 	int64_t a = (int64_t)linePointer;
-	while (**linePointer == ' ' || **linePointer == '	') {
+	while (**linePointer == ' ') {
 		(*linePointer)++;
 	}
 	return (int)((int64_t)linePointer - a);
@@ -67,13 +68,11 @@ tokenSet_t lex_line(char* line) {
 	while (1) {
 		token_t t = lex_first_token(p);
 		if (t.type == EOL) {
-			printf("eol\n");
 			break;
 		}
 		if (t.type == ERR) {
 			exit(1);
 		}
-		printf("good\n");
 		tokens[i] = t;
 		i++;
 	}
@@ -89,7 +88,6 @@ token_t lex_first_token(char** content) {
 		s[c] = **content;
 		s[c+1] = '\0';
 		(*content)++;
-		printf("lexing: %c\n", s[c]);
 		/* check if we need to parse a string or an int */
 		if (s[c] >= 65 && s[c] <= 90) {
 			free(s);
@@ -114,6 +112,10 @@ token_t lex_first_token(char** content) {
 			free(s);
 			return init_token(START_COMMENT, NULL);
 		}
+		else if (strcmp(s, "	") == 0) {
+			free(s);
+			return init_token(INDENT, NULL);
+		}
 		else if (strcmp(s, "|") == 0) {
 			free(s);
 			return init_token(JUSTIFICATION, NULL);
@@ -155,7 +157,6 @@ token_t lex_first_token(char** content) {
 			return init_token(BI_IMPLICATION, NULL);
 		}
 		else if (c <= m) {
-			printf("c: %d\n", c);
 			c++;
 			continue;
 		}
diff --git a/lexer.h b/lexer.h
index ff7ab85..e5d64dc 100644
--- a/lexer.h
+++ b/lexer.h
@@ -3,6 +3,7 @@
 typedef enum TokenType {
 	ERR,
 	EOL,
+	INDENT,
 	STRING,
 	INT,
 	OPEN_PAREN,
diff --git a/operetta.c b/operetta.c
index f399093..2c4f555 100644
--- a/operetta.c
+++ b/operetta.c
@@ -12,6 +12,9 @@ int main(int argc, char** argv) {
 	int lineCount = count_lines(content);
 	lineSet_t lines = parse_lines(content, lineCount);
 	for (int i = 0; i < lines.count; i++) {
+		for (int j = 0; j < lines.lines[i].aLevel; j++) {
+			printf(" > ");
+		}
 		write_prop(lines.lines[i].proposition);
 		printf(" BECAUSE: ");
 		write_just(lines.lines[i].justification);
diff --git a/parse.c b/parse.c
index 6bea4af..75be330 100644
--- a/parse.c
+++ b/parse.c
@@ -1,9 +1,11 @@
 #include <stdlib.h>
 #include "parse.h"
 #include "lexer.h"
+#include "stdio.h"
 
-line_t init_line(prop_t proposition, just_t justification) {
+line_t init_line(int aLevel, prop_t proposition, just_t justification) {
 	line_t line;
+	line.aLevel = aLevel;
 	line.proposition = proposition;
 	line.justification = justification;
 	return line;
@@ -39,14 +41,19 @@ lineSet_t parse_lines(char* content, int lineCount) {
 }
 line_t parse_line(char* content) {
 	tokenSet_t ts = lex_line(content);
-	int i = 0;
-	while (ts.tokens[i].type != JUSTIFICATION) {
-		i++;
+	int c = 0;
+	int indent = 0;
+	while (ts.tokens[c].type != JUSTIFICATION) {
+		if (ts.tokens[c].type == INDENT) {
+			indent++;
+		}
+		c++;
 	}
 	int* seek = calloc(sizeof(int), 1);
-	prop_t prop = parse_proposition(init_tokenset(ts.tokens, i), seek, 0);
-	just_t just = parse_justification(init_tokenset(ts.tokens + i + 1, ts.count - (i + 1)));
-	return init_line(prop, just);
+	prop_t prop = parse_proposition(init_tokenset(ts.tokens + indent, c - indent), seek, 0);
+	just_t just = parse_justification(init_tokenset(ts.tokens + c + 1, ts.count - (c + 1)));
+	free(seek);
+	return init_line(indent, prop, just);
 }
 prop_t parse_proposition(tokenSet_t tokenSet, int* seek, char isNegative) {
 	prop_t prop;
diff --git a/parse.h b/parse.h
index 80f92e2..320ca45 100644
--- a/parse.h
+++ b/parse.h
@@ -2,6 +2,7 @@
 #define PARSE
 #include "proposition.h"
 typedef struct Line {
+	int aLevel;
 	prop_t proposition;
 	just_t justification;
 } line_t;
@@ -9,7 +10,7 @@ typedef struct LineSet {
 	line_t* lines;
 	int count;
 } lineSet_t;
-line_t init_line(prop_t proposition, just_t justification);
+line_t init_line(int aLevel, prop_t proposition, just_t justification);
 lineSet_t init_lineset(line_t* lines, int count);
 int count_lines(char* content);
 lineSet_t parse_lines(char* content, int lineCount);
diff --git a/testfile b/testfile
index af46bfb..5f07502 100644
--- a/testfile
+++ b/testfile
@@ -1,3 +1,4 @@
 Q | pr
-KAI^PRESTON | as
-~CAT->(DOG^~RABBIT) | ^e 1 2
+	KAI^PRESTON | as
+	~CAT->(DOG^~RABBIT) | ^e 1 2
+V | pr
-- 
cgit v1.3.1