From cb6d02efd0eca71076e458b890571385f0bf64a4 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Tue, 6 Aug 2024 13:09:38 +0100
Subject: Chapter 14: Narrow types

Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: Dibyendu Majumdar <mobile@majumdar.org.uk>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Robert Obkircher <robert.obkircher@gmail.com>
---
 docs/chapter14/14-grammar.md | 124 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 docs/chapter14/14-grammar.md

(limited to 'docs/chapter14/14-grammar.md')

diff --git a/docs/chapter14/14-grammar.md b/docs/chapter14/14-grammar.md
new file mode 100644
index 00000000..a6d4df42
--- /dev/null
+++ b/docs/chapter14/14-grammar.md
@@ -0,0 +1,124 @@
+# Grammar for Chapter 14
+
+```antlrv4
+grammar SimpleLanguage;
+
+program : block EOF ;
+
+block : statement+ ;
+
+
+statement
+    : '{' block '}'
+    | returnStatement
+    | ifStatement
+    | whileStatement
+    | breakStatement
+    | continueStatement
+    | metaStatement
+    | structDeclaration
+    | expressionStatement
+    ;
+
+
+returnStatement : 'return' expression ';' ;
+
+ifStatement : 'if' '(' expression ')' statement ('else' statement)? ;
+
+whileStatement : 'while' '(' expression ')' statement ;
+
+breakStatement : 'break' ';' ;
+
+continueStatement : 'continue' ';' ;
+
+metaStatement : '#showGraph' ';' ;
+
+structDeclaration : 'struct' IDENTIFIER '{' fields '}'  ;
+
+fields : field+ ;
+
+field : type IDENTIFIER ';'  ;
+
+
+expressionStatement
+    : type IDENTIFIER ';'
+    | type IDENTIFIER '=' expression ';'
+    |      IDENTIFIER '=' expression ';'
+    |                     expression
+    ;
+
+PRIMTYPE
+    : 'int'
+    | 'i8'
+    | 'i16'
+    | 'i32'
+    | 'i64'
+    | 'u8'
+    | 'u16'
+    | 'u32'
+    | 'flt'
+    | 'f32'
+    | 'f64'
+    | 'bool'
+    ;
+
+type
+    : PRIMTYPE
+    | typeName ('?')?
+    ;
+
+typeName : IDENTIFIER ;
+
+
+expression : bitWiseExpression ;
+
+bitWiseExpression
+    : comparisonExpression ( '&' | '|' | '^' ) comparisonExpression)*
+    ;
+    
+comparisonExpression
+    : shiftExpression (('==' | '!='| '>'| '<'| '>='| '<=') shiftExpression)*
+    ;
+
+shiftExpression
+    : additiveExpression ( '<<' | '>>>' | '>>' ) additiveExpression)*
+    ;
+    
+additiveExpression
+    : multiplicativeExpression (('+' | '-') multiplicativeExpression)*
+    ;
+
+multiplicativeExpression
+    : unaryExpression (('*' | '/') unaryExpression)*
+    ;
+
+unaryExpression
+    : ('-') unaryExpression
+    | '!' unaryExpression
+    | primaryExpression postFix*
+    ;
+
+primaryExpression
+    : INTEGER_LITERAL
+    | '(' expression ')'
+    | 'true'
+    | 'false'
+    | 'null'
+    | newExpression
+    | IDENTIFIER
+    ;
+
+newExpression : 'new' IDENTIFIER ;
+
+postFix : '.' IDENTIFIER [ '=' expression ] ;
+
+INTEGER_LITERAL
+    : [1-9]DIGIT*
+    | [0]
+    ;
+
+IDENTIFIER : NON_DIGIT (NON_DIGIT | DIGIT)*  ;
+
+NON_DIGIT: [a-zA-Z_];
+DIGIT: [0-9];
+```
-- 
cgit v1.2.3