From 1b5c0f43171820812f09b71fa0512c0025d2d187 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Thu, 12 Sep 2024 11:13:31 -0700
Subject: Ch15 initial push

---
 chapter15/docs/15-grammar.md | 157 +++++++++++++++++++++++++++++++++++++++++++
 chapter15/docs/Makefile      |  12 ++++
 2 files changed, 169 insertions(+)
 create mode 100644 chapter15/docs/15-grammar.md
 create mode 100644 chapter15/docs/Makefile

(limited to 'chapter15/docs')

diff --git a/chapter15/docs/15-grammar.md b/chapter15/docs/15-grammar.md
new file mode 100644
index 00000000..ec9ac123
--- /dev/null
+++ b/chapter15/docs/15-grammar.md
@@ -0,0 +1,157 @@
+# Grammar for Chapter 14
+
+```antlrv4
+grammar SimpleLanguage;
+
+program
+    : statement+ EOF
+    ;
+
+statement
+    : returnStatement
+    | structDeclaration
+    | declStatement
+    | blockStatment
+    | expressionStatement
+    | ifStatement
+    | whileStatement
+    | breakStatement
+    | continueStatment
+    | metaStatement
+    ;
+
+type
+    : 'int'
+    | 'i8'
+    | 'i16'
+    | 'i32'
+    | 'i64'
+    | 'u8'
+    | 'u16'
+    | 'u32'
+    | 'flt'
+    | 'f32'
+    | 'f64'
+    | 'bool'
+    ;
+    
+field
+    : type IDENTIFIER ';'
+    ;
+
+fields
+    : field+
+    ;
+
+structDeclaration
+    : 'struct' IDENTIFIER '{' fields '}'
+    ;
+
+whileStatement
+    : 'while' '(' expression ')' statement
+    ;
+
+breakStatement
+    : 'break' ';'
+    ;
+
+continueStatement
+    : 'continue' ';'
+    ;
+
+ifStatement
+    : 'if' '(' expression ')' statement ('else' statement)?
+    ;
+
+metaStatement
+    : '#showGraph' ';'
+    ;
+
+expressionStatement
+    : IDENTIFIER '=' expression ';'
+    | fieldExpression '=' expression ';'
+    ;
+
+blockStatement
+    : '{' statement+ '}'
+    ;
+
+structName
+    : IDENTIFIER
+    ;
+
+declStatement
+    : type IDENTIFIER '=' expression ';'
+    | structName IDENTIFIER ('?')? '=' expression ';'
+    ;
+
+returnStatement
+    : 'return' expression ';'
+    ;
+
+expression
+    : bitWiseExpression
+    ;
+
+bitWiseExpression
+    : comparisonExpression ( '&' | '|' | '^' ) comparisonExpression)*
+    ;
+    
+comparisonExpression
+    : shiftExpression (('==' | '!='| '>'| '<'| '>='| '<=') shiftExpression)*
+    ;
+
+shiftExpression
+    : additiveExpression ( '<<' | '>>>' | '>>' ) additiveExpression)*
+    ;
+    
+additiveExpression
+    : multiplicativeExpression (('+' | '-') multiplicativeExpression)*
+    ;
+
+multiplicativeExpression
+    : unaryExpression (('*' | '|') unaryExpression)*
+    ;
+
+unaryExpression
+    : ('-') unaryExpression
+    | '!' unaryExpression
+    | primaryExpression
+    ;
+
+arrayExpression
+    : XXX '[' expression ']'
+    | primaryExpression
+    ;
+
+newExpression
+    : 'new' IDENTIFIER
+    ;
+
+fieldExpression
+    : primaryExpresson '.' IDENTIFIER
+    ;
+
+primaryExpression
+    : IDENTIFIER
+    | INTEGER_LITERAL
+    | 'true'
+    | 'false'
+    | 'null'
+    | newExpression
+    | '(' expression ')'
+    | fieldExpression
+    ;
+
+INTEGER_LITERAL
+    : [1-9][0-9]*
+    | [0]
+    ;
+
+IDENTIFIER
+    : NON_DIGIT (NON_DIGIT | DIGIT)*
+    ;
+
+NON_DIGIT: [a-zA-Z_];
+DEC_DIGIT: [0-9];
+```
diff --git a/chapter15/docs/Makefile b/chapter15/docs/Makefile
new file mode 100644
index 00000000..12659b8f
--- /dev/null
+++ b/chapter15/docs/Makefile
@@ -0,0 +1,12 @@
+GV := $(wildcard *.gv)
+SVG := $(patsubst %.gv,%.svg,$(GV))
+
+.PHONY: all
+all: $(SVG)
+
+%.svg: %.gv
+	dot -Tsvg $< > $@
+
+.PHONY: clean
+clean:
+	@rm -f $(SVG)
-- 
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