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Introduction
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In this chapter we will be covering following topics in detail. |
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- White Space
- Comments
- Vera Identifiers
- Vera Reserved Names
- String Constants
- Numbers
- Statements
- Statements Blocks
- Assignment
- Compound Assignment
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White Space
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White space is any sequence of spaces, tabs, newlines, and formfeeds. White space is used in Vera as a token separator. Except within a string, white space is ignored. |
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Comments
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Vera supports two types of comments as in Verilog and C language. |
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- Single line comment
- Multi line comment
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Single Line Comment |
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A single-line comment starts with a double slash (//) and finishes out the line. |
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Multi Line Comment |
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A block statement starts with a /* and ends with a */. Everything between the start and end tags is a comment. |
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Example - Comments
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1 program comments {
2 // This is single line comment
3 integer i ; // This is another comment
4
5 /* This is multi
6 line comments,
7 like in Verilog */
8
9 }
You could download file comments.vr here
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Identifiers
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An identifier is a user selected name used in an Vera language. It is composed of a sequence of letters [a-zA-Z], digits[0-9] and underscores[_]. Identifiers are case-sensitive and cannot begin with a digit. |
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Example - Identifiers
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1 program identifiers {
2 // Valid identiers
3 integer valid_name_2;
4 integer address_Bus;
5 // Invalid identifiers
6 bit [7:0] 9_addr_bit;
7 }
You could download file identifiers.vr here
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Copyright © 1998-2014 |
Deepak Kumar Tala - All rights reserved |
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Do you have any Comment? mail me at:deepak@asic-world.com
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